File: | src/gnu/usr.bin/clang/libclangCodeGen/../../../llvm/clang/lib/CodeGen/CGCoroutine.cpp |
Warning: | line 95, column 21 Called C++ object pointer is null |
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1 | //===----- CGCoroutine.cpp - Emit LLVM Code for C++ coroutines ------------===// | |||
2 | // | |||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |||
4 | // See https://llvm.org/LICENSE.txt for license information. | |||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |||
6 | // | |||
7 | //===----------------------------------------------------------------------===// | |||
8 | // | |||
9 | // This contains code dealing with C++ code generation of coroutines. | |||
10 | // | |||
11 | //===----------------------------------------------------------------------===// | |||
12 | ||||
13 | #include "CGCleanup.h" | |||
14 | #include "CodeGenFunction.h" | |||
15 | #include "llvm/ADT/ScopeExit.h" | |||
16 | #include "clang/AST/StmtCXX.h" | |||
17 | #include "clang/AST/StmtVisitor.h" | |||
18 | ||||
19 | using namespace clang; | |||
20 | using namespace CodeGen; | |||
21 | ||||
22 | using llvm::Value; | |||
23 | using llvm::BasicBlock; | |||
24 | ||||
25 | namespace { | |||
26 | enum class AwaitKind { Init, Normal, Yield, Final }; | |||
27 | static constexpr llvm::StringLiteral AwaitKindStr[] = {"init", "await", "yield", | |||
28 | "final"}; | |||
29 | } | |||
30 | ||||
31 | struct clang::CodeGen::CGCoroData { | |||
32 | // What is the current await expression kind and how many | |||
33 | // await/yield expressions were encountered so far. | |||
34 | // These are used to generate pretty labels for await expressions in LLVM IR. | |||
35 | AwaitKind CurrentAwaitKind = AwaitKind::Init; | |||
36 | unsigned AwaitNum = 0; | |||
37 | unsigned YieldNum = 0; | |||
38 | ||||
39 | // How many co_return statements are in the coroutine. Used to decide whether | |||
40 | // we need to add co_return; equivalent at the end of the user authored body. | |||
41 | unsigned CoreturnCount = 0; | |||
42 | ||||
43 | // A branch to this block is emitted when coroutine needs to suspend. | |||
44 | llvm::BasicBlock *SuspendBB = nullptr; | |||
45 | ||||
46 | // The promise type's 'unhandled_exception' handler, if it defines one. | |||
47 | Stmt *ExceptionHandler = nullptr; | |||
48 | ||||
49 | // A temporary i1 alloca that stores whether 'await_resume' threw an | |||
50 | // exception. If it did, 'true' is stored in this variable, and the coroutine | |||
51 | // body must be skipped. If the promise type does not define an exception | |||
52 | // handler, this is null. | |||
53 | llvm::Value *ResumeEHVar = nullptr; | |||
54 | ||||
55 | // Stores the jump destination just before the coroutine memory is freed. | |||
56 | // This is the destination that every suspend point jumps to for the cleanup | |||
57 | // branch. | |||
58 | CodeGenFunction::JumpDest CleanupJD; | |||
59 | ||||
60 | // Stores the jump destination just before the final suspend. The co_return | |||
61 | // statements jumps to this point after calling return_xxx promise member. | |||
62 | CodeGenFunction::JumpDest FinalJD; | |||
63 | ||||
64 | // Stores the llvm.coro.id emitted in the function so that we can supply it | |||
65 | // as the first argument to coro.begin, coro.alloc and coro.free intrinsics. | |||
66 | // Note: llvm.coro.id returns a token that cannot be directly expressed in a | |||
67 | // builtin. | |||
68 | llvm::CallInst *CoroId = nullptr; | |||
69 | ||||
70 | // Stores the llvm.coro.begin emitted in the function so that we can replace | |||
71 | // all coro.frame intrinsics with direct SSA value of coro.begin that returns | |||
72 | // the address of the coroutine frame of the current coroutine. | |||
73 | llvm::CallInst *CoroBegin = nullptr; | |||
74 | ||||
75 | // Stores the last emitted coro.free for the deallocate expressions, we use it | |||
76 | // to wrap dealloc code with if(auto mem = coro.free) dealloc(mem). | |||
77 | llvm::CallInst *LastCoroFree = nullptr; | |||
78 | ||||
79 | // If coro.id came from the builtin, remember the expression to give better | |||
80 | // diagnostic. If CoroIdExpr is nullptr, the coro.id was created by | |||
81 | // EmitCoroutineBody. | |||
82 | CallExpr const *CoroIdExpr = nullptr; | |||
83 | }; | |||
84 | ||||
85 | // Defining these here allows to keep CGCoroData private to this file. | |||
86 | clang::CodeGen::CodeGenFunction::CGCoroInfo::CGCoroInfo() {} | |||
87 | CodeGenFunction::CGCoroInfo::~CGCoroInfo() {} | |||
88 | ||||
89 | static void createCoroData(CodeGenFunction &CGF, | |||
90 | CodeGenFunction::CGCoroInfo &CurCoro, | |||
91 | llvm::CallInst *CoroId, | |||
92 | CallExpr const *CoroIdExpr = nullptr) { | |||
93 | if (CurCoro.Data) { | |||
94 | if (CurCoro.Data->CoroIdExpr) | |||
95 | CGF.CGM.Error(CoroIdExpr->getBeginLoc(), | |||
| ||||
96 | "only one __builtin_coro_id can be used in a function"); | |||
97 | else if (CoroIdExpr) | |||
98 | CGF.CGM.Error(CoroIdExpr->getBeginLoc(), | |||
99 | "__builtin_coro_id shall not be used in a C++ coroutine"); | |||
100 | else | |||
101 | llvm_unreachable("EmitCoroutineBodyStatement called twice?")__builtin_unreachable(); | |||
102 | ||||
103 | return; | |||
104 | } | |||
105 | ||||
106 | CurCoro.Data = std::unique_ptr<CGCoroData>(new CGCoroData); | |||
107 | CurCoro.Data->CoroId = CoroId; | |||
108 | CurCoro.Data->CoroIdExpr = CoroIdExpr; | |||
109 | } | |||
110 | ||||
111 | // Synthesize a pretty name for a suspend point. | |||
112 | static SmallString<32> buildSuspendPrefixStr(CGCoroData &Coro, AwaitKind Kind) { | |||
113 | unsigned No = 0; | |||
114 | switch (Kind) { | |||
115 | case AwaitKind::Init: | |||
116 | case AwaitKind::Final: | |||
117 | break; | |||
118 | case AwaitKind::Normal: | |||
119 | No = ++Coro.AwaitNum; | |||
120 | break; | |||
121 | case AwaitKind::Yield: | |||
122 | No = ++Coro.YieldNum; | |||
123 | break; | |||
124 | } | |||
125 | SmallString<32> Prefix(AwaitKindStr[static_cast<unsigned>(Kind)]); | |||
126 | if (No > 1) { | |||
127 | Twine(No).toVector(Prefix); | |||
128 | } | |||
129 | return Prefix; | |||
130 | } | |||
131 | ||||
132 | static bool memberCallExpressionCanThrow(const Expr *E) { | |||
133 | if (const auto *CE = dyn_cast<CXXMemberCallExpr>(E)) | |||
134 | if (const auto *Proto = | |||
135 | CE->getMethodDecl()->getType()->getAs<FunctionProtoType>()) | |||
136 | if (isNoexceptExceptionSpec(Proto->getExceptionSpecType()) && | |||
137 | Proto->canThrow() == CT_Cannot) | |||
138 | return false; | |||
139 | return true; | |||
140 | } | |||
141 | ||||
142 | // Emit suspend expression which roughly looks like: | |||
143 | // | |||
144 | // auto && x = CommonExpr(); | |||
145 | // if (!x.await_ready()) { | |||
146 | // llvm_coro_save(); | |||
147 | // x.await_suspend(...); (*) | |||
148 | // llvm_coro_suspend(); (**) | |||
149 | // } | |||
150 | // x.await_resume(); | |||
151 | // | |||
152 | // where the result of the entire expression is the result of x.await_resume() | |||
153 | // | |||
154 | // (*) If x.await_suspend return type is bool, it allows to veto a suspend: | |||
155 | // if (x.await_suspend(...)) | |||
156 | // llvm_coro_suspend(); | |||
157 | // | |||
158 | // (**) llvm_coro_suspend() encodes three possible continuations as | |||
159 | // a switch instruction: | |||
160 | // | |||
161 | // %where-to = call i8 @llvm.coro.suspend(...) | |||
162 | // switch i8 %where-to, label %coro.ret [ ; jump to epilogue to suspend | |||
163 | // i8 0, label %yield.ready ; go here when resumed | |||
164 | // i8 1, label %yield.cleanup ; go here when destroyed | |||
165 | // ] | |||
166 | // | |||
167 | // See llvm's docs/Coroutines.rst for more details. | |||
168 | // | |||
169 | namespace { | |||
170 | struct LValueOrRValue { | |||
171 | LValue LV; | |||
172 | RValue RV; | |||
173 | }; | |||
174 | } | |||
175 | static LValueOrRValue emitSuspendExpression(CodeGenFunction &CGF, CGCoroData &Coro, | |||
176 | CoroutineSuspendExpr const &S, | |||
177 | AwaitKind Kind, AggValueSlot aggSlot, | |||
178 | bool ignoreResult, bool forLValue) { | |||
179 | auto *E = S.getCommonExpr(); | |||
180 | ||||
181 | auto Binder = | |||
182 | CodeGenFunction::OpaqueValueMappingData::bind(CGF, S.getOpaqueValue(), E); | |||
183 | auto UnbindOnExit = llvm::make_scope_exit([&] { Binder.unbind(CGF); }); | |||
184 | ||||
185 | auto Prefix = buildSuspendPrefixStr(Coro, Kind); | |||
186 | BasicBlock *ReadyBlock = CGF.createBasicBlock(Prefix + Twine(".ready")); | |||
187 | BasicBlock *SuspendBlock = CGF.createBasicBlock(Prefix + Twine(".suspend")); | |||
188 | BasicBlock *CleanupBlock = CGF.createBasicBlock(Prefix + Twine(".cleanup")); | |||
189 | ||||
190 | // If expression is ready, no need to suspend. | |||
191 | CGF.EmitBranchOnBoolExpr(S.getReadyExpr(), ReadyBlock, SuspendBlock, 0); | |||
192 | ||||
193 | // Otherwise, emit suspend logic. | |||
194 | CGF.EmitBlock(SuspendBlock); | |||
195 | ||||
196 | auto &Builder = CGF.Builder; | |||
197 | llvm::Function *CoroSave = CGF.CGM.getIntrinsic(llvm::Intrinsic::coro_save); | |||
198 | auto *NullPtr = llvm::ConstantPointerNull::get(CGF.CGM.Int8PtrTy); | |||
199 | auto *SaveCall = Builder.CreateCall(CoroSave, {NullPtr}); | |||
200 | ||||
201 | auto *SuspendRet = CGF.EmitScalarExpr(S.getSuspendExpr()); | |||
202 | if (SuspendRet != nullptr && SuspendRet->getType()->isIntegerTy(1)) { | |||
203 | // Veto suspension if requested by bool returning await_suspend. | |||
204 | BasicBlock *RealSuspendBlock = | |||
205 | CGF.createBasicBlock(Prefix + Twine(".suspend.bool")); | |||
206 | CGF.Builder.CreateCondBr(SuspendRet, RealSuspendBlock, ReadyBlock); | |||
207 | CGF.EmitBlock(RealSuspendBlock); | |||
208 | } | |||
209 | ||||
210 | // Emit the suspend point. | |||
211 | const bool IsFinalSuspend = (Kind == AwaitKind::Final); | |||
212 | llvm::Function *CoroSuspend = | |||
213 | CGF.CGM.getIntrinsic(llvm::Intrinsic::coro_suspend); | |||
214 | auto *SuspendResult = Builder.CreateCall( | |||
215 | CoroSuspend, {SaveCall, Builder.getInt1(IsFinalSuspend)}); | |||
216 | ||||
217 | // Create a switch capturing three possible continuations. | |||
218 | auto *Switch = Builder.CreateSwitch(SuspendResult, Coro.SuspendBB, 2); | |||
219 | Switch->addCase(Builder.getInt8(0), ReadyBlock); | |||
220 | Switch->addCase(Builder.getInt8(1), CleanupBlock); | |||
221 | ||||
222 | // Emit cleanup for this suspend point. | |||
223 | CGF.EmitBlock(CleanupBlock); | |||
224 | CGF.EmitBranchThroughCleanup(Coro.CleanupJD); | |||
225 | ||||
226 | // Emit await_resume expression. | |||
227 | CGF.EmitBlock(ReadyBlock); | |||
228 | ||||
229 | // Exception handling requires additional IR. If the 'await_resume' function | |||
230 | // is marked as 'noexcept', we avoid generating this additional IR. | |||
231 | CXXTryStmt *TryStmt = nullptr; | |||
232 | if (Coro.ExceptionHandler && Kind == AwaitKind::Init && | |||
233 | memberCallExpressionCanThrow(S.getResumeExpr())) { | |||
234 | Coro.ResumeEHVar = | |||
235 | CGF.CreateTempAlloca(Builder.getInt1Ty(), Prefix + Twine("resume.eh")); | |||
236 | Builder.CreateFlagStore(true, Coro.ResumeEHVar); | |||
237 | ||||
238 | auto Loc = S.getResumeExpr()->getExprLoc(); | |||
239 | auto *Catch = new (CGF.getContext()) | |||
240 | CXXCatchStmt(Loc, /*exDecl=*/nullptr, Coro.ExceptionHandler); | |||
241 | auto *TryBody = | |||
242 | CompoundStmt::Create(CGF.getContext(), S.getResumeExpr(), Loc, Loc); | |||
243 | TryStmt = CXXTryStmt::Create(CGF.getContext(), Loc, TryBody, Catch); | |||
244 | CGF.EnterCXXTryStmt(*TryStmt); | |||
245 | } | |||
246 | ||||
247 | LValueOrRValue Res; | |||
248 | if (forLValue) | |||
249 | Res.LV = CGF.EmitLValue(S.getResumeExpr()); | |||
250 | else | |||
251 | Res.RV = CGF.EmitAnyExpr(S.getResumeExpr(), aggSlot, ignoreResult); | |||
252 | ||||
253 | if (TryStmt) { | |||
254 | Builder.CreateFlagStore(false, Coro.ResumeEHVar); | |||
255 | CGF.ExitCXXTryStmt(*TryStmt); | |||
256 | } | |||
257 | ||||
258 | return Res; | |||
259 | } | |||
260 | ||||
261 | RValue CodeGenFunction::EmitCoawaitExpr(const CoawaitExpr &E, | |||
262 | AggValueSlot aggSlot, | |||
263 | bool ignoreResult) { | |||
264 | return emitSuspendExpression(*this, *CurCoro.Data, E, | |||
265 | CurCoro.Data->CurrentAwaitKind, aggSlot, | |||
266 | ignoreResult, /*forLValue*/false).RV; | |||
267 | } | |||
268 | RValue CodeGenFunction::EmitCoyieldExpr(const CoyieldExpr &E, | |||
269 | AggValueSlot aggSlot, | |||
270 | bool ignoreResult) { | |||
271 | return emitSuspendExpression(*this, *CurCoro.Data, E, AwaitKind::Yield, | |||
272 | aggSlot, ignoreResult, /*forLValue*/false).RV; | |||
273 | } | |||
274 | ||||
275 | void CodeGenFunction::EmitCoreturnStmt(CoreturnStmt const &S) { | |||
276 | ++CurCoro.Data->CoreturnCount; | |||
277 | const Expr *RV = S.getOperand(); | |||
278 | if (RV && RV->getType()->isVoidType() && !isa<InitListExpr>(RV)) { | |||
279 | // Make sure to evaluate the non initlist expression of a co_return | |||
280 | // with a void expression for side effects. | |||
281 | RunCleanupsScope cleanupScope(*this); | |||
282 | EmitIgnoredExpr(RV); | |||
283 | } | |||
284 | EmitStmt(S.getPromiseCall()); | |||
285 | EmitBranchThroughCleanup(CurCoro.Data->FinalJD); | |||
286 | } | |||
287 | ||||
288 | ||||
289 | #ifndef NDEBUG1 | |||
290 | static QualType getCoroutineSuspendExprReturnType(const ASTContext &Ctx, | |||
291 | const CoroutineSuspendExpr *E) { | |||
292 | const auto *RE = E->getResumeExpr(); | |||
293 | // Is it possible for RE to be a CXXBindTemporaryExpr wrapping | |||
294 | // a MemberCallExpr? | |||
295 | assert(isa<CallExpr>(RE) && "unexpected suspend expression type")((void)0); | |||
296 | return cast<CallExpr>(RE)->getCallReturnType(Ctx); | |||
297 | } | |||
298 | #endif | |||
299 | ||||
300 | LValue | |||
301 | CodeGenFunction::EmitCoawaitLValue(const CoawaitExpr *E) { | |||
302 | assert(getCoroutineSuspendExprReturnType(getContext(), E)->isReferenceType() &&((void)0) | |||
303 | "Can't have a scalar return unless the return type is a "((void)0) | |||
304 | "reference type!")((void)0); | |||
305 | return emitSuspendExpression(*this, *CurCoro.Data, *E, | |||
306 | CurCoro.Data->CurrentAwaitKind, AggValueSlot::ignored(), | |||
307 | /*ignoreResult*/false, /*forLValue*/true).LV; | |||
308 | } | |||
309 | ||||
310 | LValue | |||
311 | CodeGenFunction::EmitCoyieldLValue(const CoyieldExpr *E) { | |||
312 | assert(getCoroutineSuspendExprReturnType(getContext(), E)->isReferenceType() &&((void)0) | |||
313 | "Can't have a scalar return unless the return type is a "((void)0) | |||
314 | "reference type!")((void)0); | |||
315 | return emitSuspendExpression(*this, *CurCoro.Data, *E, | |||
316 | AwaitKind::Yield, AggValueSlot::ignored(), | |||
317 | /*ignoreResult*/false, /*forLValue*/true).LV; | |||
318 | } | |||
319 | ||||
320 | // Hunts for the parameter reference in the parameter copy/move declaration. | |||
321 | namespace { | |||
322 | struct GetParamRef : public StmtVisitor<GetParamRef> { | |||
323 | public: | |||
324 | DeclRefExpr *Expr = nullptr; | |||
325 | GetParamRef() {} | |||
326 | void VisitDeclRefExpr(DeclRefExpr *E) { | |||
327 | assert(Expr == nullptr && "multilple declref in param move")((void)0); | |||
328 | Expr = E; | |||
329 | } | |||
330 | void VisitStmt(Stmt *S) { | |||
331 | for (auto *C : S->children()) { | |||
332 | if (C) | |||
333 | Visit(C); | |||
334 | } | |||
335 | } | |||
336 | }; | |||
337 | } | |||
338 | ||||
339 | // This class replaces references to parameters to their copies by changing | |||
340 | // the addresses in CGF.LocalDeclMap and restoring back the original values in | |||
341 | // its destructor. | |||
342 | ||||
343 | namespace { | |||
344 | struct ParamReferenceReplacerRAII { | |||
345 | CodeGenFunction::DeclMapTy SavedLocals; | |||
346 | CodeGenFunction::DeclMapTy& LocalDeclMap; | |||
347 | ||||
348 | ParamReferenceReplacerRAII(CodeGenFunction::DeclMapTy &LocalDeclMap) | |||
349 | : LocalDeclMap(LocalDeclMap) {} | |||
350 | ||||
351 | void addCopy(DeclStmt const *PM) { | |||
352 | // Figure out what param it refers to. | |||
353 | ||||
354 | assert(PM->isSingleDecl())((void)0); | |||
355 | VarDecl const*VD = static_cast<VarDecl const*>(PM->getSingleDecl()); | |||
356 | Expr const *InitExpr = VD->getInit(); | |||
357 | GetParamRef Visitor; | |||
358 | Visitor.Visit(const_cast<Expr*>(InitExpr)); | |||
359 | assert(Visitor.Expr)((void)0); | |||
360 | DeclRefExpr *DREOrig = Visitor.Expr; | |||
361 | auto *PD = DREOrig->getDecl(); | |||
362 | ||||
363 | auto it = LocalDeclMap.find(PD); | |||
364 | assert(it != LocalDeclMap.end() && "parameter is not found")((void)0); | |||
365 | SavedLocals.insert({ PD, it->second }); | |||
366 | ||||
367 | auto copyIt = LocalDeclMap.find(VD); | |||
368 | assert(copyIt != LocalDeclMap.end() && "parameter copy is not found")((void)0); | |||
369 | it->second = copyIt->getSecond(); | |||
370 | } | |||
371 | ||||
372 | ~ParamReferenceReplacerRAII() { | |||
373 | for (auto&& SavedLocal : SavedLocals) { | |||
374 | LocalDeclMap.insert({SavedLocal.first, SavedLocal.second}); | |||
375 | } | |||
376 | } | |||
377 | }; | |||
378 | } | |||
379 | ||||
380 | // For WinEH exception representation backend needs to know what funclet coro.end | |||
381 | // belongs to. That information is passed in a funclet bundle. | |||
382 | static SmallVector<llvm::OperandBundleDef, 1> | |||
383 | getBundlesForCoroEnd(CodeGenFunction &CGF) { | |||
384 | SmallVector<llvm::OperandBundleDef, 1> BundleList; | |||
385 | ||||
386 | if (llvm::Instruction *EHPad = CGF.CurrentFuncletPad) | |||
387 | BundleList.emplace_back("funclet", EHPad); | |||
388 | ||||
389 | return BundleList; | |||
390 | } | |||
391 | ||||
392 | namespace { | |||
393 | // We will insert coro.end to cut any of the destructors for objects that | |||
394 | // do not need to be destroyed once the coroutine is resumed. | |||
395 | // See llvm/docs/Coroutines.rst for more details about coro.end. | |||
396 | struct CallCoroEnd final : public EHScopeStack::Cleanup { | |||
397 | void Emit(CodeGenFunction &CGF, Flags flags) override { | |||
398 | auto &CGM = CGF.CGM; | |||
399 | auto *NullPtr = llvm::ConstantPointerNull::get(CGF.Int8PtrTy); | |||
400 | llvm::Function *CoroEndFn = CGM.getIntrinsic(llvm::Intrinsic::coro_end); | |||
401 | // See if we have a funclet bundle to associate coro.end with. (WinEH) | |||
402 | auto Bundles = getBundlesForCoroEnd(CGF); | |||
403 | auto *CoroEnd = CGF.Builder.CreateCall( | |||
404 | CoroEndFn, {NullPtr, CGF.Builder.getTrue()}, Bundles); | |||
405 | if (Bundles.empty()) { | |||
406 | // Otherwise, (landingpad model), create a conditional branch that leads | |||
407 | // either to a cleanup block or a block with EH resume instruction. | |||
408 | auto *ResumeBB = CGF.getEHResumeBlock(/*isCleanup=*/true); | |||
409 | auto *CleanupContBB = CGF.createBasicBlock("cleanup.cont"); | |||
410 | CGF.Builder.CreateCondBr(CoroEnd, ResumeBB, CleanupContBB); | |||
411 | CGF.EmitBlock(CleanupContBB); | |||
412 | } | |||
413 | } | |||
414 | }; | |||
415 | } | |||
416 | ||||
417 | namespace { | |||
418 | // Make sure to call coro.delete on scope exit. | |||
419 | struct CallCoroDelete final : public EHScopeStack::Cleanup { | |||
420 | Stmt *Deallocate; | |||
421 | ||||
422 | // Emit "if (coro.free(CoroId, CoroBegin)) Deallocate;" | |||
423 | ||||
424 | // Note: That deallocation will be emitted twice: once for a normal exit and | |||
425 | // once for exceptional exit. This usage is safe because Deallocate does not | |||
426 | // contain any declarations. The SubStmtBuilder::makeNewAndDeleteExpr() | |||
427 | // builds a single call to a deallocation function which is safe to emit | |||
428 | // multiple times. | |||
429 | void Emit(CodeGenFunction &CGF, Flags) override { | |||
430 | // Remember the current point, as we are going to emit deallocation code | |||
431 | // first to get to coro.free instruction that is an argument to a delete | |||
432 | // call. | |||
433 | BasicBlock *SaveInsertBlock = CGF.Builder.GetInsertBlock(); | |||
434 | ||||
435 | auto *FreeBB = CGF.createBasicBlock("coro.free"); | |||
436 | CGF.EmitBlock(FreeBB); | |||
437 | CGF.EmitStmt(Deallocate); | |||
438 | ||||
439 | auto *AfterFreeBB = CGF.createBasicBlock("after.coro.free"); | |||
440 | CGF.EmitBlock(AfterFreeBB); | |||
441 | ||||
442 | // We should have captured coro.free from the emission of deallocate. | |||
443 | auto *CoroFree = CGF.CurCoro.Data->LastCoroFree; | |||
444 | if (!CoroFree) { | |||
445 | CGF.CGM.Error(Deallocate->getBeginLoc(), | |||
446 | "Deallocation expressoin does not refer to coro.free"); | |||
447 | return; | |||
448 | } | |||
449 | ||||
450 | // Get back to the block we were originally and move coro.free there. | |||
451 | auto *InsertPt = SaveInsertBlock->getTerminator(); | |||
452 | CoroFree->moveBefore(InsertPt); | |||
453 | CGF.Builder.SetInsertPoint(InsertPt); | |||
454 | ||||
455 | // Add if (auto *mem = coro.free) Deallocate; | |||
456 | auto *NullPtr = llvm::ConstantPointerNull::get(CGF.Int8PtrTy); | |||
457 | auto *Cond = CGF.Builder.CreateICmpNE(CoroFree, NullPtr); | |||
458 | CGF.Builder.CreateCondBr(Cond, FreeBB, AfterFreeBB); | |||
459 | ||||
460 | // No longer need old terminator. | |||
461 | InsertPt->eraseFromParent(); | |||
462 | CGF.Builder.SetInsertPoint(AfterFreeBB); | |||
463 | } | |||
464 | explicit CallCoroDelete(Stmt *DeallocStmt) : Deallocate(DeallocStmt) {} | |||
465 | }; | |||
466 | } | |||
467 | ||||
468 | namespace { | |||
469 | struct GetReturnObjectManager { | |||
470 | CodeGenFunction &CGF; | |||
471 | CGBuilderTy &Builder; | |||
472 | const CoroutineBodyStmt &S; | |||
473 | ||||
474 | Address GroActiveFlag; | |||
475 | CodeGenFunction::AutoVarEmission GroEmission; | |||
476 | ||||
477 | GetReturnObjectManager(CodeGenFunction &CGF, const CoroutineBodyStmt &S) | |||
478 | : CGF(CGF), Builder(CGF.Builder), S(S), GroActiveFlag(Address::invalid()), | |||
479 | GroEmission(CodeGenFunction::AutoVarEmission::invalid()) {} | |||
480 | ||||
481 | // The gro variable has to outlive coroutine frame and coroutine promise, but, | |||
482 | // it can only be initialized after coroutine promise was created, thus, we | |||
483 | // split its emission in two parts. EmitGroAlloca emits an alloca and sets up | |||
484 | // cleanups. Later when coroutine promise is available we initialize the gro | |||
485 | // and sets the flag that the cleanup is now active. | |||
486 | ||||
487 | void EmitGroAlloca() { | |||
488 | auto *GroDeclStmt = dyn_cast<DeclStmt>(S.getResultDecl()); | |||
489 | if (!GroDeclStmt) { | |||
490 | // If get_return_object returns void, no need to do an alloca. | |||
491 | return; | |||
492 | } | |||
493 | ||||
494 | auto *GroVarDecl = cast<VarDecl>(GroDeclStmt->getSingleDecl()); | |||
495 | ||||
496 | // Set GRO flag that it is not initialized yet | |||
497 | GroActiveFlag = | |||
498 | CGF.CreateTempAlloca(Builder.getInt1Ty(), CharUnits::One(), "gro.active"); | |||
499 | Builder.CreateStore(Builder.getFalse(), GroActiveFlag); | |||
500 | ||||
501 | GroEmission = CGF.EmitAutoVarAlloca(*GroVarDecl); | |||
502 | ||||
503 | // Remember the top of EHStack before emitting the cleanup. | |||
504 | auto old_top = CGF.EHStack.stable_begin(); | |||
505 | CGF.EmitAutoVarCleanups(GroEmission); | |||
506 | auto top = CGF.EHStack.stable_begin(); | |||
507 | ||||
508 | // Make the cleanup conditional on gro.active | |||
509 | for (auto b = CGF.EHStack.find(top), e = CGF.EHStack.find(old_top); | |||
510 | b != e; b++) { | |||
511 | if (auto *Cleanup = dyn_cast<EHCleanupScope>(&*b)) { | |||
512 | assert(!Cleanup->hasActiveFlag() && "cleanup already has active flag?")((void)0); | |||
513 | Cleanup->setActiveFlag(GroActiveFlag); | |||
514 | Cleanup->setTestFlagInEHCleanup(); | |||
515 | Cleanup->setTestFlagInNormalCleanup(); | |||
516 | } | |||
517 | } | |||
518 | } | |||
519 | ||||
520 | void EmitGroInit() { | |||
521 | if (!GroActiveFlag.isValid()) { | |||
522 | // No Gro variable was allocated. Simply emit the call to | |||
523 | // get_return_object. | |||
524 | CGF.EmitStmt(S.getResultDecl()); | |||
525 | return; | |||
526 | } | |||
527 | ||||
528 | CGF.EmitAutoVarInit(GroEmission); | |||
529 | Builder.CreateStore(Builder.getTrue(), GroActiveFlag); | |||
530 | } | |||
531 | }; | |||
532 | } | |||
533 | ||||
534 | static void emitBodyAndFallthrough(CodeGenFunction &CGF, | |||
535 | const CoroutineBodyStmt &S, Stmt *Body) { | |||
536 | CGF.EmitStmt(Body); | |||
537 | const bool CanFallthrough = CGF.Builder.GetInsertBlock(); | |||
538 | if (CanFallthrough) | |||
539 | if (Stmt *OnFallthrough = S.getFallthroughHandler()) | |||
540 | CGF.EmitStmt(OnFallthrough); | |||
541 | } | |||
542 | ||||
543 | void CodeGenFunction::EmitCoroutineBody(const CoroutineBodyStmt &S) { | |||
544 | auto *NullPtr = llvm::ConstantPointerNull::get(Builder.getInt8PtrTy()); | |||
545 | auto &TI = CGM.getContext().getTargetInfo(); | |||
546 | unsigned NewAlign = TI.getNewAlign() / TI.getCharWidth(); | |||
547 | ||||
548 | auto *EntryBB = Builder.GetInsertBlock(); | |||
549 | auto *AllocBB = createBasicBlock("coro.alloc"); | |||
550 | auto *InitBB = createBasicBlock("coro.init"); | |||
551 | auto *FinalBB = createBasicBlock("coro.final"); | |||
552 | auto *RetBB = createBasicBlock("coro.ret"); | |||
553 | ||||
554 | auto *CoroId = Builder.CreateCall( | |||
555 | CGM.getIntrinsic(llvm::Intrinsic::coro_id), | |||
556 | {Builder.getInt32(NewAlign), NullPtr, NullPtr, NullPtr}); | |||
557 | createCoroData(*this, CurCoro, CoroId); | |||
| ||||
558 | CurCoro.Data->SuspendBB = RetBB; | |||
559 | assert(ShouldEmitLifetimeMarkers &&((void)0) | |||
560 | "Must emit lifetime intrinsics for coroutines")((void)0); | |||
561 | ||||
562 | // Backend is allowed to elide memory allocations, to help it, emit | |||
563 | // auto mem = coro.alloc() ? 0 : ... allocation code ...; | |||
564 | auto *CoroAlloc = Builder.CreateCall( | |||
565 | CGM.getIntrinsic(llvm::Intrinsic::coro_alloc), {CoroId}); | |||
566 | ||||
567 | Builder.CreateCondBr(CoroAlloc, AllocBB, InitBB); | |||
568 | ||||
569 | EmitBlock(AllocBB); | |||
570 | auto *AllocateCall = EmitScalarExpr(S.getAllocate()); | |||
571 | auto *AllocOrInvokeContBB = Builder.GetInsertBlock(); | |||
572 | ||||
573 | // Handle allocation failure if 'ReturnStmtOnAllocFailure' was provided. | |||
574 | if (auto *RetOnAllocFailure = S.getReturnStmtOnAllocFailure()) { | |||
575 | auto *RetOnFailureBB = createBasicBlock("coro.ret.on.failure"); | |||
576 | ||||
577 | // See if allocation was successful. | |||
578 | auto *NullPtr = llvm::ConstantPointerNull::get(Int8PtrTy); | |||
579 | auto *Cond = Builder.CreateICmpNE(AllocateCall, NullPtr); | |||
580 | Builder.CreateCondBr(Cond, InitBB, RetOnFailureBB); | |||
581 | ||||
582 | // If not, return OnAllocFailure object. | |||
583 | EmitBlock(RetOnFailureBB); | |||
584 | EmitStmt(RetOnAllocFailure); | |||
585 | } | |||
586 | else { | |||
587 | Builder.CreateBr(InitBB); | |||
588 | } | |||
589 | ||||
590 | EmitBlock(InitBB); | |||
591 | ||||
592 | // Pass the result of the allocation to coro.begin. | |||
593 | auto *Phi = Builder.CreatePHI(VoidPtrTy, 2); | |||
594 | Phi->addIncoming(NullPtr, EntryBB); | |||
595 | Phi->addIncoming(AllocateCall, AllocOrInvokeContBB); | |||
596 | auto *CoroBegin = Builder.CreateCall( | |||
597 | CGM.getIntrinsic(llvm::Intrinsic::coro_begin), {CoroId, Phi}); | |||
598 | CurCoro.Data->CoroBegin = CoroBegin; | |||
599 | ||||
600 | GetReturnObjectManager GroManager(*this, S); | |||
601 | GroManager.EmitGroAlloca(); | |||
602 | ||||
603 | CurCoro.Data->CleanupJD = getJumpDestInCurrentScope(RetBB); | |||
604 | { | |||
605 | CGDebugInfo *DI = getDebugInfo(); | |||
606 | ParamReferenceReplacerRAII ParamReplacer(LocalDeclMap); | |||
607 | CodeGenFunction::RunCleanupsScope ResumeScope(*this); | |||
608 | EHStack.pushCleanup<CallCoroDelete>(NormalAndEHCleanup, S.getDeallocate()); | |||
609 | ||||
610 | // Create mapping between parameters and copy-params for coroutine function. | |||
611 | auto ParamMoves = S.getParamMoves(); | |||
612 | assert(((void)0) | |||
613 | (ParamMoves.size() == 0 || (ParamMoves.size() == FnArgs.size())) &&((void)0) | |||
614 | "ParamMoves and FnArgs should be the same size for coroutine function")((void)0); | |||
615 | if (ParamMoves.size() == FnArgs.size() && DI) | |||
616 | for (const auto Pair : llvm::zip(FnArgs, ParamMoves)) | |||
617 | DI->getCoroutineParameterMappings().insert( | |||
618 | {std::get<0>(Pair), std::get<1>(Pair)}); | |||
619 | ||||
620 | // Create parameter copies. We do it before creating a promise, since an | |||
621 | // evolution of coroutine TS may allow promise constructor to observe | |||
622 | // parameter copies. | |||
623 | for (auto *PM : S.getParamMoves()) { | |||
624 | EmitStmt(PM); | |||
625 | ParamReplacer.addCopy(cast<DeclStmt>(PM)); | |||
626 | // TODO: if(CoroParam(...)) need to surround ctor and dtor | |||
627 | // for the copy, so that llvm can elide it if the copy is | |||
628 | // not needed. | |||
629 | } | |||
630 | ||||
631 | EmitStmt(S.getPromiseDeclStmt()); | |||
632 | ||||
633 | Address PromiseAddr = GetAddrOfLocalVar(S.getPromiseDecl()); | |||
634 | auto *PromiseAddrVoidPtr = | |||
635 | new llvm::BitCastInst(PromiseAddr.getPointer(), VoidPtrTy, "", CoroId); | |||
636 | // Update CoroId to refer to the promise. We could not do it earlier because | |||
637 | // promise local variable was not emitted yet. | |||
638 | CoroId->setArgOperand(1, PromiseAddrVoidPtr); | |||
639 | ||||
640 | // Now we have the promise, initialize the GRO | |||
641 | GroManager.EmitGroInit(); | |||
642 | ||||
643 | EHStack.pushCleanup<CallCoroEnd>(EHCleanup); | |||
644 | ||||
645 | CurCoro.Data->CurrentAwaitKind = AwaitKind::Init; | |||
646 | CurCoro.Data->ExceptionHandler = S.getExceptionHandler(); | |||
647 | EmitStmt(S.getInitSuspendStmt()); | |||
648 | CurCoro.Data->FinalJD = getJumpDestInCurrentScope(FinalBB); | |||
649 | ||||
650 | CurCoro.Data->CurrentAwaitKind = AwaitKind::Normal; | |||
651 | ||||
652 | if (CurCoro.Data->ExceptionHandler) { | |||
653 | // If we generated IR to record whether an exception was thrown from | |||
654 | // 'await_resume', then use that IR to determine whether the coroutine | |||
655 | // body should be skipped. | |||
656 | // If we didn't generate the IR (perhaps because 'await_resume' was marked | |||
657 | // as 'noexcept'), then we skip this check. | |||
658 | BasicBlock *ContBB = nullptr; | |||
659 | if (CurCoro.Data->ResumeEHVar) { | |||
660 | BasicBlock *BodyBB = createBasicBlock("coro.resumed.body"); | |||
661 | ContBB = createBasicBlock("coro.resumed.cont"); | |||
662 | Value *SkipBody = Builder.CreateFlagLoad(CurCoro.Data->ResumeEHVar, | |||
663 | "coro.resumed.eh"); | |||
664 | Builder.CreateCondBr(SkipBody, ContBB, BodyBB); | |||
665 | EmitBlock(BodyBB); | |||
666 | } | |||
667 | ||||
668 | auto Loc = S.getBeginLoc(); | |||
669 | CXXCatchStmt Catch(Loc, /*exDecl=*/nullptr, | |||
670 | CurCoro.Data->ExceptionHandler); | |||
671 | auto *TryStmt = | |||
672 | CXXTryStmt::Create(getContext(), Loc, S.getBody(), &Catch); | |||
673 | ||||
674 | EnterCXXTryStmt(*TryStmt); | |||
675 | emitBodyAndFallthrough(*this, S, TryStmt->getTryBlock()); | |||
676 | ExitCXXTryStmt(*TryStmt); | |||
677 | ||||
678 | if (ContBB) | |||
679 | EmitBlock(ContBB); | |||
680 | } | |||
681 | else { | |||
682 | emitBodyAndFallthrough(*this, S, S.getBody()); | |||
683 | } | |||
684 | ||||
685 | // See if we need to generate final suspend. | |||
686 | const bool CanFallthrough = Builder.GetInsertBlock(); | |||
687 | const bool HasCoreturns = CurCoro.Data->CoreturnCount > 0; | |||
688 | if (CanFallthrough || HasCoreturns) { | |||
689 | EmitBlock(FinalBB); | |||
690 | CurCoro.Data->CurrentAwaitKind = AwaitKind::Final; | |||
691 | EmitStmt(S.getFinalSuspendStmt()); | |||
692 | } else { | |||
693 | // We don't need FinalBB. Emit it to make sure the block is deleted. | |||
694 | EmitBlock(FinalBB, /*IsFinished=*/true); | |||
695 | } | |||
696 | } | |||
697 | ||||
698 | EmitBlock(RetBB); | |||
699 | // Emit coro.end before getReturnStmt (and parameter destructors), since | |||
700 | // resume and destroy parts of the coroutine should not include them. | |||
701 | llvm::Function *CoroEnd = CGM.getIntrinsic(llvm::Intrinsic::coro_end); | |||
702 | Builder.CreateCall(CoroEnd, {NullPtr, Builder.getFalse()}); | |||
703 | ||||
704 | if (Stmt *Ret = S.getReturnStmt()) | |||
705 | EmitStmt(Ret); | |||
706 | } | |||
707 | ||||
708 | // Emit coroutine intrinsic and patch up arguments of the token type. | |||
709 | RValue CodeGenFunction::EmitCoroutineIntrinsic(const CallExpr *E, | |||
710 | unsigned int IID) { | |||
711 | SmallVector<llvm::Value *, 8> Args; | |||
712 | switch (IID) { | |||
713 | default: | |||
714 | break; | |||
715 | // The coro.frame builtin is replaced with an SSA value of the coro.begin | |||
716 | // intrinsic. | |||
717 | case llvm::Intrinsic::coro_frame: { | |||
718 | if (CurCoro.Data && CurCoro.Data->CoroBegin) { | |||
719 | return RValue::get(CurCoro.Data->CoroBegin); | |||
720 | } | |||
721 | CGM.Error(E->getBeginLoc(), "this builtin expect that __builtin_coro_begin " | |||
722 | "has been used earlier in this function"); | |||
723 | auto NullPtr = llvm::ConstantPointerNull::get(Builder.getInt8PtrTy()); | |||
724 | return RValue::get(NullPtr); | |||
725 | } | |||
726 | // The following three intrinsics take a token parameter referring to a token | |||
727 | // returned by earlier call to @llvm.coro.id. Since we cannot represent it in | |||
728 | // builtins, we patch it up here. | |||
729 | case llvm::Intrinsic::coro_alloc: | |||
730 | case llvm::Intrinsic::coro_begin: | |||
731 | case llvm::Intrinsic::coro_free: { | |||
732 | if (CurCoro.Data && CurCoro.Data->CoroId) { | |||
733 | Args.push_back(CurCoro.Data->CoroId); | |||
734 | break; | |||
735 | } | |||
736 | CGM.Error(E->getBeginLoc(), "this builtin expect that __builtin_coro_id has" | |||
737 | " been used earlier in this function"); | |||
738 | // Fallthrough to the next case to add TokenNone as the first argument. | |||
739 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
740 | } | |||
741 | // @llvm.coro.suspend takes a token parameter. Add token 'none' as the first | |||
742 | // argument. | |||
743 | case llvm::Intrinsic::coro_suspend: | |||
744 | Args.push_back(llvm::ConstantTokenNone::get(getLLVMContext())); | |||
745 | break; | |||
746 | } | |||
747 | for (const Expr *Arg : E->arguments()) | |||
748 | Args.push_back(EmitScalarExpr(Arg)); | |||
749 | ||||
750 | llvm::Function *F = CGM.getIntrinsic(IID); | |||
751 | llvm::CallInst *Call = Builder.CreateCall(F, Args); | |||
752 | ||||
753 | // Note: The following code is to enable to emit coro.id and coro.begin by | |||
754 | // hand to experiment with coroutines in C. | |||
755 | // If we see @llvm.coro.id remember it in the CoroData. We will update | |||
756 | // coro.alloc, coro.begin and coro.free intrinsics to refer to it. | |||
757 | if (IID == llvm::Intrinsic::coro_id) { | |||
758 | createCoroData(*this, CurCoro, Call, E); | |||
759 | } | |||
760 | else if (IID == llvm::Intrinsic::coro_begin) { | |||
761 | if (CurCoro.Data) | |||
762 | CurCoro.Data->CoroBegin = Call; | |||
763 | } | |||
764 | else if (IID == llvm::Intrinsic::coro_free) { | |||
765 | // Remember the last coro_free as we need it to build the conditional | |||
766 | // deletion of the coroutine frame. | |||
767 | if (CurCoro.Data) | |||
768 | CurCoro.Data->LastCoroFree = Call; | |||
769 | } | |||
770 | return RValue::get(Call); | |||
771 | } |
1 | // -*- C++ -*- |
2 | //===----------------------------------------------------------------------===// |
3 | // |
4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
5 | // See https://llvm.org/LICENSE.txt for license information. |
6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
7 | // |
8 | //===----------------------------------------------------------------------===// |
9 | |
10 | #ifndef _LIBCPP___MEMORY_UNIQUE_PTR_H |
11 | #define _LIBCPP___MEMORY_UNIQUE_PTR_H |
12 | |
13 | #include <__config> |
14 | #include <__functional_base> |
15 | #include <__functional/hash.h> |
16 | #include <__functional/operations.h> |
17 | #include <__memory/allocator_traits.h> // __pointer |
18 | #include <__memory/compressed_pair.h> |
19 | #include <__utility/forward.h> |
20 | #include <cstddef> |
21 | #include <type_traits> |
22 | #include <utility> |
23 | |
24 | #if _LIBCPP_STD_VER14 <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) |
25 | # include <__memory/auto_ptr.h> |
26 | #endif |
27 | |
28 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
29 | #pragma GCC system_header |
30 | #endif |
31 | |
32 | _LIBCPP_PUSH_MACROSpush_macro("min") push_macro("max") |
33 | #include <__undef_macros> |
34 | |
35 | _LIBCPP_BEGIN_NAMESPACE_STDnamespace std { inline namespace __1 { |
36 | |
37 | template <class _Tp> |
38 | struct _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) default_delete { |
39 | static_assert(!is_function<_Tp>::value, |
40 | "default_delete cannot be instantiated for function types"); |
41 | #ifndef _LIBCPP_CXX03_LANG |
42 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) constexpr default_delete() _NOEXCEPTnoexcept = default; |
43 | #else |
44 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) default_delete() {} |
45 | #endif |
46 | template <class _Up> |
47 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
48 | default_delete(const default_delete<_Up>&, |
49 | typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* = |
50 | 0) _NOEXCEPTnoexcept {} |
51 | |
52 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) void operator()(_Tp* __ptr) const _NOEXCEPTnoexcept { |
53 | static_assert(sizeof(_Tp) > 0, |
54 | "default_delete can not delete incomplete type"); |
55 | static_assert(!is_void<_Tp>::value, |
56 | "default_delete can not delete incomplete type"); |
57 | delete __ptr; |
58 | } |
59 | }; |
60 | |
61 | template <class _Tp> |
62 | struct _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) default_delete<_Tp[]> { |
63 | private: |
64 | template <class _Up> |
65 | struct _EnableIfConvertible |
66 | : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {}; |
67 | |
68 | public: |
69 | #ifndef _LIBCPP_CXX03_LANG |
70 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) constexpr default_delete() _NOEXCEPTnoexcept = default; |
71 | #else |
72 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) default_delete() {} |
73 | #endif |
74 | |
75 | template <class _Up> |
76 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
77 | default_delete(const default_delete<_Up[]>&, |
78 | typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPTnoexcept {} |
79 | |
80 | template <class _Up> |
81 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
82 | typename _EnableIfConvertible<_Up>::type |
83 | operator()(_Up* __ptr) const _NOEXCEPTnoexcept { |
84 | static_assert(sizeof(_Tp) > 0, |
85 | "default_delete can not delete incomplete type"); |
86 | static_assert(!is_void<_Tp>::value, |
87 | "default_delete can not delete void type"); |
88 | delete[] __ptr; |
89 | } |
90 | }; |
91 | |
92 | template <class _Deleter> |
93 | struct __unique_ptr_deleter_sfinae { |
94 | static_assert(!is_reference<_Deleter>::value, "incorrect specialization"); |
95 | typedef const _Deleter& __lval_ref_type; |
96 | typedef _Deleter&& __good_rval_ref_type; |
97 | typedef true_type __enable_rval_overload; |
98 | }; |
99 | |
100 | template <class _Deleter> |
101 | struct __unique_ptr_deleter_sfinae<_Deleter const&> { |
102 | typedef const _Deleter& __lval_ref_type; |
103 | typedef const _Deleter&& __bad_rval_ref_type; |
104 | typedef false_type __enable_rval_overload; |
105 | }; |
106 | |
107 | template <class _Deleter> |
108 | struct __unique_ptr_deleter_sfinae<_Deleter&> { |
109 | typedef _Deleter& __lval_ref_type; |
110 | typedef _Deleter&& __bad_rval_ref_type; |
111 | typedef false_type __enable_rval_overload; |
112 | }; |
113 | |
114 | #if defined(_LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI) |
115 | # define _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI __attribute__((trivial_abi)) |
116 | #else |
117 | # define _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI |
118 | #endif |
119 | |
120 | template <class _Tp, class _Dp = default_delete<_Tp> > |
121 | class _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) unique_ptr { |
122 | public: |
123 | typedef _Tp element_type; |
124 | typedef _Dp deleter_type; |
125 | typedef _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) typename __pointer<_Tp, deleter_type>::type pointer; |
126 | |
127 | static_assert(!is_rvalue_reference<deleter_type>::value, |
128 | "the specified deleter type cannot be an rvalue reference"); |
129 | |
130 | private: |
131 | __compressed_pair<pointer, deleter_type> __ptr_; |
132 | |
133 | struct __nat { int __for_bool_; }; |
134 | |
135 | typedef _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; |
136 | |
137 | template <bool _Dummy> |
138 | using _LValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
139 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; |
140 | |
141 | template <bool _Dummy> |
142 | using _GoodRValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
143 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; |
144 | |
145 | template <bool _Dummy> |
146 | using _BadRValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
147 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; |
148 | |
149 | template <bool _Dummy, class _Deleter = typename __dependent_type< |
150 | __identity<deleter_type>, _Dummy>::type> |
151 | using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
152 | typename enable_if<is_default_constructible<_Deleter>::value && |
153 | !is_pointer<_Deleter>::value>::type; |
154 | |
155 | template <class _ArgType> |
156 | using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
157 | typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; |
158 | |
159 | template <class _UPtr, class _Up> |
160 | using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
161 | is_convertible<typename _UPtr::pointer, pointer>::value && |
162 | !is_array<_Up>::value |
163 | >::type; |
164 | |
165 | template <class _UDel> |
166 | using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
167 | (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || |
168 | (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) |
169 | >::type; |
170 | |
171 | template <class _UDel> |
172 | using _EnableIfDeleterAssignable = typename enable_if< |
173 | is_assignable<_Dp&, _UDel&&>::value |
174 | >::type; |
175 | |
176 | public: |
177 | template <bool _Dummy = true, |
178 | class = _EnableIfDeleterDefaultConstructible<_Dummy> > |
179 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
180 | _LIBCPP_CONSTEXPRconstexpr unique_ptr() _NOEXCEPTnoexcept : __ptr_(pointer(), __default_init_tag()) {} |
181 | |
182 | template <bool _Dummy = true, |
183 | class = _EnableIfDeleterDefaultConstructible<_Dummy> > |
184 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
185 | _LIBCPP_CONSTEXPRconstexpr unique_ptr(nullptr_t) _NOEXCEPTnoexcept : __ptr_(pointer(), __default_init_tag()) {} |
186 | |
187 | template <bool _Dummy = true, |
188 | class = _EnableIfDeleterDefaultConstructible<_Dummy> > |
189 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
190 | explicit unique_ptr(pointer __p) _NOEXCEPTnoexcept : __ptr_(__p, __default_init_tag()) {} |
191 | |
192 | template <bool _Dummy = true, |
193 | class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > |
194 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
195 | unique_ptr(pointer __p, _LValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
196 | : __ptr_(__p, __d) {} |
197 | |
198 | template <bool _Dummy = true, |
199 | class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > |
200 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
201 | unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
202 | : __ptr_(__p, _VSTDstd::__1::move(__d)) { |
203 | static_assert(!is_reference<deleter_type>::value, |
204 | "rvalue deleter bound to reference"); |
205 | } |
206 | |
207 | template <bool _Dummy = true, |
208 | class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> > > |
209 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
210 | unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete; |
211 | |
212 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
213 | unique_ptr(unique_ptr&& __u) _NOEXCEPTnoexcept |
214 | : __ptr_(__u.release(), _VSTDstd::__1::forward<deleter_type>(__u.get_deleter())) { |
215 | } |
216 | |
217 | template <class _Up, class _Ep, |
218 | class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, |
219 | class = _EnableIfDeleterConvertible<_Ep> |
220 | > |
221 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
222 | unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPTnoexcept |
223 | : __ptr_(__u.release(), _VSTDstd::__1::forward<_Ep>(__u.get_deleter())) {} |
224 | |
225 | #if _LIBCPP_STD_VER14 <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) |
226 | template <class _Up> |
227 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
228 | unique_ptr(auto_ptr<_Up>&& __p, |
229 | typename enable_if<is_convertible<_Up*, _Tp*>::value && |
230 | is_same<_Dp, default_delete<_Tp> >::value, |
231 | __nat>::type = __nat()) _NOEXCEPTnoexcept |
232 | : __ptr_(__p.release(), __default_init_tag()) {} |
233 | #endif |
234 | |
235 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
236 | unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPTnoexcept { |
237 | reset(__u.release()); |
238 | __ptr_.second() = _VSTDstd::__1::forward<deleter_type>(__u.get_deleter()); |
239 | return *this; |
240 | } |
241 | |
242 | template <class _Up, class _Ep, |
243 | class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, |
244 | class = _EnableIfDeleterAssignable<_Ep> |
245 | > |
246 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
247 | unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPTnoexcept { |
248 | reset(__u.release()); |
249 | __ptr_.second() = _VSTDstd::__1::forward<_Ep>(__u.get_deleter()); |
250 | return *this; |
251 | } |
252 | |
253 | #if _LIBCPP_STD_VER14 <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) |
254 | template <class _Up> |
255 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
256 | typename enable_if<is_convertible<_Up*, _Tp*>::value && |
257 | is_same<_Dp, default_delete<_Tp> >::value, |
258 | unique_ptr&>::type |
259 | operator=(auto_ptr<_Up> __p) { |
260 | reset(__p.release()); |
261 | return *this; |
262 | } |
263 | #endif |
264 | |
265 | #ifdef _LIBCPP_CXX03_LANG |
266 | unique_ptr(unique_ptr const&) = delete; |
267 | unique_ptr& operator=(unique_ptr const&) = delete; |
268 | #endif |
269 | |
270 | |
271 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
272 | ~unique_ptr() { reset(); } |
273 | |
274 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
275 | unique_ptr& operator=(nullptr_t) _NOEXCEPTnoexcept { |
276 | reset(); |
277 | return *this; |
278 | } |
279 | |
280 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
281 | typename add_lvalue_reference<_Tp>::type |
282 | operator*() const { |
283 | return *__ptr_.first(); |
284 | } |
285 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
286 | pointer operator->() const _NOEXCEPTnoexcept { |
287 | return __ptr_.first(); |
288 | } |
289 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
290 | pointer get() const _NOEXCEPTnoexcept { |
291 | return __ptr_.first(); |
292 | } |
293 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
294 | deleter_type& get_deleter() _NOEXCEPTnoexcept { |
295 | return __ptr_.second(); |
296 | } |
297 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
298 | const deleter_type& get_deleter() const _NOEXCEPTnoexcept { |
299 | return __ptr_.second(); |
300 | } |
301 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
302 | explicit operator bool() const _NOEXCEPTnoexcept { |
303 | return __ptr_.first() != nullptr; |
304 | } |
305 | |
306 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
307 | pointer release() _NOEXCEPTnoexcept { |
308 | pointer __t = __ptr_.first(); |
309 | __ptr_.first() = pointer(); |
310 | return __t; |
311 | } |
312 | |
313 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
314 | void reset(pointer __p = pointer()) _NOEXCEPTnoexcept { |
315 | pointer __tmp = __ptr_.first(); |
316 | __ptr_.first() = __p; |
317 | if (__tmp) |
318 | __ptr_.second()(__tmp); |
319 | } |
320 | |
321 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
322 | void swap(unique_ptr& __u) _NOEXCEPTnoexcept { |
323 | __ptr_.swap(__u.__ptr_); |
324 | } |
325 | }; |
326 | |
327 | |
328 | template <class _Tp, class _Dp> |
329 | class _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) unique_ptr<_Tp[], _Dp> { |
330 | public: |
331 | typedef _Tp element_type; |
332 | typedef _Dp deleter_type; |
333 | typedef typename __pointer<_Tp, deleter_type>::type pointer; |
334 | |
335 | private: |
336 | __compressed_pair<pointer, deleter_type> __ptr_; |
337 | |
338 | template <class _From> |
339 | struct _CheckArrayPointerConversion : is_same<_From, pointer> {}; |
340 | |
341 | template <class _FromElem> |
342 | struct _CheckArrayPointerConversion<_FromElem*> |
343 | : integral_constant<bool, |
344 | is_same<_FromElem*, pointer>::value || |
345 | (is_same<pointer, element_type*>::value && |
346 | is_convertible<_FromElem(*)[], element_type(*)[]>::value) |
347 | > |
348 | {}; |
349 | |
350 | typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; |
351 | |
352 | template <bool _Dummy> |
353 | using _LValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
354 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; |
355 | |
356 | template <bool _Dummy> |
357 | using _GoodRValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
358 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; |
359 | |
360 | template <bool _Dummy> |
361 | using _BadRValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
362 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; |
363 | |
364 | template <bool _Dummy, class _Deleter = typename __dependent_type< |
365 | __identity<deleter_type>, _Dummy>::type> |
366 | using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
367 | typename enable_if<is_default_constructible<_Deleter>::value && |
368 | !is_pointer<_Deleter>::value>::type; |
369 | |
370 | template <class _ArgType> |
371 | using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
372 | typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; |
373 | |
374 | template <class _Pp> |
375 | using _EnableIfPointerConvertible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
376 | _CheckArrayPointerConversion<_Pp>::value |
377 | >::type; |
378 | |
379 | template <class _UPtr, class _Up, |
380 | class _ElemT = typename _UPtr::element_type> |
381 | using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
382 | is_array<_Up>::value && |
383 | is_same<pointer, element_type*>::value && |
384 | is_same<typename _UPtr::pointer, _ElemT*>::value && |
385 | is_convertible<_ElemT(*)[], element_type(*)[]>::value |
386 | >::type; |
387 | |
388 | template <class _UDel> |
389 | using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
390 | (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || |
391 | (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) |
392 | >::type; |
393 | |
394 | template <class _UDel> |
395 | using _EnableIfDeleterAssignable _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
396 | is_assignable<_Dp&, _UDel&&>::value |
397 | >::type; |
398 | |
399 | public: |
400 | template <bool _Dummy = true, |
401 | class = _EnableIfDeleterDefaultConstructible<_Dummy> > |
402 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
403 | _LIBCPP_CONSTEXPRconstexpr unique_ptr() _NOEXCEPTnoexcept : __ptr_(pointer(), __default_init_tag()) {} |
404 | |
405 | template <bool _Dummy = true, |
406 | class = _EnableIfDeleterDefaultConstructible<_Dummy> > |
407 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
408 | _LIBCPP_CONSTEXPRconstexpr unique_ptr(nullptr_t) _NOEXCEPTnoexcept : __ptr_(pointer(), __default_init_tag()) {} |
409 | |
410 | template <class _Pp, bool _Dummy = true, |
411 | class = _EnableIfDeleterDefaultConstructible<_Dummy>, |
412 | class = _EnableIfPointerConvertible<_Pp> > |
413 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
414 | explicit unique_ptr(_Pp __p) _NOEXCEPTnoexcept |
415 | : __ptr_(__p, __default_init_tag()) {} |
416 | |
417 | template <class _Pp, bool _Dummy = true, |
418 | class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> >, |
419 | class = _EnableIfPointerConvertible<_Pp> > |
420 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
421 | unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
422 | : __ptr_(__p, __d) {} |
423 | |
424 | template <bool _Dummy = true, |
425 | class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > |
426 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
427 | unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
428 | : __ptr_(nullptr, __d) {} |
429 | |
430 | template <class _Pp, bool _Dummy = true, |
431 | class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> >, |
432 | class = _EnableIfPointerConvertible<_Pp> > |
433 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
434 | unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
435 | : __ptr_(__p, _VSTDstd::__1::move(__d)) { |
436 | static_assert(!is_reference<deleter_type>::value, |
437 | "rvalue deleter bound to reference"); |
438 | } |
439 | |
440 | template <bool _Dummy = true, |
441 | class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > |
442 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
443 | unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
444 | : __ptr_(nullptr, _VSTDstd::__1::move(__d)) { |
445 | static_assert(!is_reference<deleter_type>::value, |
446 | "rvalue deleter bound to reference"); |
447 | } |
448 | |
449 | template <class _Pp, bool _Dummy = true, |
450 | class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> >, |
451 | class = _EnableIfPointerConvertible<_Pp> > |
452 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
453 | unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete; |
454 | |
455 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
456 | unique_ptr(unique_ptr&& __u) _NOEXCEPTnoexcept |
457 | : __ptr_(__u.release(), _VSTDstd::__1::forward<deleter_type>(__u.get_deleter())) { |
458 | } |
459 | |
460 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
461 | unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPTnoexcept { |
462 | reset(__u.release()); |
463 | __ptr_.second() = _VSTDstd::__1::forward<deleter_type>(__u.get_deleter()); |
464 | return *this; |
465 | } |
466 | |
467 | template <class _Up, class _Ep, |
468 | class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, |
469 | class = _EnableIfDeleterConvertible<_Ep> |
470 | > |
471 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
472 | unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPTnoexcept |
473 | : __ptr_(__u.release(), _VSTDstd::__1::forward<_Ep>(__u.get_deleter())) { |
474 | } |
475 | |
476 | template <class _Up, class _Ep, |
477 | class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, |
478 | class = _EnableIfDeleterAssignable<_Ep> |
479 | > |
480 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
481 | unique_ptr& |
482 | operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPTnoexcept { |
483 | reset(__u.release()); |
484 | __ptr_.second() = _VSTDstd::__1::forward<_Ep>(__u.get_deleter()); |
485 | return *this; |
486 | } |
487 | |
488 | #ifdef _LIBCPP_CXX03_LANG |
489 | unique_ptr(unique_ptr const&) = delete; |
490 | unique_ptr& operator=(unique_ptr const&) = delete; |
491 | #endif |
492 | |
493 | public: |
494 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
495 | ~unique_ptr() { reset(); } |
496 | |
497 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
498 | unique_ptr& operator=(nullptr_t) _NOEXCEPTnoexcept { |
499 | reset(); |
500 | return *this; |
501 | } |
502 | |
503 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
504 | typename add_lvalue_reference<_Tp>::type |
505 | operator[](size_t __i) const { |
506 | return __ptr_.first()[__i]; |
507 | } |
508 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
509 | pointer get() const _NOEXCEPTnoexcept { |
510 | return __ptr_.first(); |
511 | } |
512 | |
513 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
514 | deleter_type& get_deleter() _NOEXCEPTnoexcept { |
515 | return __ptr_.second(); |
516 | } |
517 | |
518 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
519 | const deleter_type& get_deleter() const _NOEXCEPTnoexcept { |
520 | return __ptr_.second(); |
521 | } |
522 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
523 | explicit operator bool() const _NOEXCEPTnoexcept { |
524 | return __ptr_.first() != nullptr; |
525 | } |
526 | |
527 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
528 | pointer release() _NOEXCEPTnoexcept { |
529 | pointer __t = __ptr_.first(); |
530 | __ptr_.first() = pointer(); |
531 | return __t; |
532 | } |
533 | |
534 | template <class _Pp> |
535 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
536 | typename enable_if< |
537 | _CheckArrayPointerConversion<_Pp>::value |
538 | >::type |
539 | reset(_Pp __p) _NOEXCEPTnoexcept { |
540 | pointer __tmp = __ptr_.first(); |
541 | __ptr_.first() = __p; |
542 | if (__tmp) |
543 | __ptr_.second()(__tmp); |
544 | } |
545 | |
546 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
547 | void reset(nullptr_t = nullptr) _NOEXCEPTnoexcept { |
548 | pointer __tmp = __ptr_.first(); |
549 | __ptr_.first() = nullptr; |
550 | if (__tmp) |
551 | __ptr_.second()(__tmp); |
552 | } |
553 | |
554 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
555 | void swap(unique_ptr& __u) _NOEXCEPTnoexcept { |
556 | __ptr_.swap(__u.__ptr_); |
557 | } |
558 | |
559 | }; |
560 | |
561 | template <class _Tp, class _Dp> |
562 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
563 | typename enable_if< |
564 | __is_swappable<_Dp>::value, |
565 | void |
566 | >::type |
567 | swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPTnoexcept {__x.swap(__y);} |
568 | |
569 | template <class _T1, class _D1, class _T2, class _D2> |
570 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
571 | bool |
572 | operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();} |
573 | |
574 | template <class _T1, class _D1, class _T2, class _D2> |
575 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
576 | bool |
577 | operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);} |
578 | |
579 | template <class _T1, class _D1, class _T2, class _D2> |
580 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
581 | bool |
582 | operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) |
583 | { |
584 | typedef typename unique_ptr<_T1, _D1>::pointer _P1; |
585 | typedef typename unique_ptr<_T2, _D2>::pointer _P2; |
586 | typedef typename common_type<_P1, _P2>::type _Vp; |
587 | return less<_Vp>()(__x.get(), __y.get()); |
588 | } |
589 | |
590 | template <class _T1, class _D1, class _T2, class _D2> |
591 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
592 | bool |
593 | operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;} |
594 | |
595 | template <class _T1, class _D1, class _T2, class _D2> |
596 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
597 | bool |
598 | operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);} |
599 | |
600 | template <class _T1, class _D1, class _T2, class _D2> |
601 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
602 | bool |
603 | operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);} |
604 | |
605 | template <class _T1, class _D1> |
606 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
607 | bool |
608 | operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPTnoexcept |
609 | { |
610 | return !__x; |
611 | } |
612 | |
613 | template <class _T1, class _D1> |
614 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
615 | bool |
616 | operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPTnoexcept |
617 | { |
618 | return !__x; |
619 | } |
620 | |
621 | template <class _T1, class _D1> |
622 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
623 | bool |
624 | operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPTnoexcept |
625 | { |
626 | return static_cast<bool>(__x); |
627 | } |
628 | |
629 | template <class _T1, class _D1> |
630 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
631 | bool |
632 | operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPTnoexcept |
633 | { |
634 | return static_cast<bool>(__x); |
635 | } |
636 | |
637 | template <class _T1, class _D1> |
638 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
639 | bool |
640 | operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t) |
641 | { |
642 | typedef typename unique_ptr<_T1, _D1>::pointer _P1; |
643 | return less<_P1>()(__x.get(), nullptr); |
644 | } |
645 | |
646 | template <class _T1, class _D1> |
647 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
648 | bool |
649 | operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x) |
650 | { |
651 | typedef typename unique_ptr<_T1, _D1>::pointer _P1; |
652 | return less<_P1>()(nullptr, __x.get()); |
653 | } |
654 | |
655 | template <class _T1, class _D1> |
656 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
657 | bool |
658 | operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t) |
659 | { |
660 | return nullptr < __x; |
661 | } |
662 | |
663 | template <class _T1, class _D1> |
664 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
665 | bool |
666 | operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x) |
667 | { |
668 | return __x < nullptr; |
669 | } |
670 | |
671 | template <class _T1, class _D1> |
672 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
673 | bool |
674 | operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t) |
675 | { |
676 | return !(nullptr < __x); |
677 | } |
678 | |
679 | template <class _T1, class _D1> |
680 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
681 | bool |
682 | operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x) |
683 | { |
684 | return !(__x < nullptr); |
685 | } |
686 | |
687 | template <class _T1, class _D1> |
688 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
689 | bool |
690 | operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t) |
691 | { |
692 | return !(__x < nullptr); |
693 | } |
694 | |
695 | template <class _T1, class _D1> |
696 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
697 | bool |
698 | operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x) |
699 | { |
700 | return !(nullptr < __x); |
701 | } |
702 | |
703 | #if _LIBCPP_STD_VER14 > 11 |
704 | |
705 | template<class _Tp> |
706 | struct __unique_if |
707 | { |
708 | typedef unique_ptr<_Tp> __unique_single; |
709 | }; |
710 | |
711 | template<class _Tp> |
712 | struct __unique_if<_Tp[]> |
713 | { |
714 | typedef unique_ptr<_Tp[]> __unique_array_unknown_bound; |
715 | }; |
716 | |
717 | template<class _Tp, size_t _Np> |
718 | struct __unique_if<_Tp[_Np]> |
719 | { |
720 | typedef void __unique_array_known_bound; |
721 | }; |
722 | |
723 | template<class _Tp, class... _Args> |
724 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
725 | typename __unique_if<_Tp>::__unique_single |
726 | make_unique(_Args&&... __args) |
727 | { |
728 | return unique_ptr<_Tp>(new _Tp(_VSTDstd::__1::forward<_Args>(__args)...)); |
729 | } |
730 | |
731 | template<class _Tp> |
732 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
733 | typename __unique_if<_Tp>::__unique_array_unknown_bound |
734 | make_unique(size_t __n) |
735 | { |
736 | typedef typename remove_extent<_Tp>::type _Up; |
737 | return unique_ptr<_Tp>(new _Up[__n]()); |
738 | } |
739 | |
740 | template<class _Tp, class... _Args> |
741 | typename __unique_if<_Tp>::__unique_array_known_bound |
742 | make_unique(_Args&&...) = delete; |
743 | |
744 | #endif // _LIBCPP_STD_VER > 11 |
745 | |
746 | template <class _Tp> struct _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) hash; |
747 | |
748 | template <class _Tp, class _Dp> |
749 | #ifdef _LIBCPP_CXX03_LANG |
750 | struct _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) hash<unique_ptr<_Tp, _Dp> > |
751 | #else |
752 | struct _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) hash<__enable_hash_helper< |
753 | unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer> > |
754 | #endif |
755 | { |
756 | #if _LIBCPP_STD_VER14 <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS) |
757 | _LIBCPP_DEPRECATED_IN_CXX17 typedef unique_ptr<_Tp, _Dp> argument_type; |
758 | _LIBCPP_DEPRECATED_IN_CXX17 typedef size_t result_type; |
759 | #endif |
760 | |
761 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
762 | size_t operator()(const unique_ptr<_Tp, _Dp>& __ptr) const |
763 | { |
764 | typedef typename unique_ptr<_Tp, _Dp>::pointer pointer; |
765 | return hash<pointer>()(__ptr.get()); |
766 | } |
767 | }; |
768 | |
769 | _LIBCPP_END_NAMESPACE_STD} } |
770 | |
771 | _LIBCPP_POP_MACROSpop_macro("min") pop_macro("max") |
772 | |
773 | #endif // _LIBCPP___MEMORY_UNIQUE_PTR_H |