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57 lines
1.5 KiB
57 lines
1.5 KiB
4 months ago
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/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkMutex_DEFINED
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#define SkMutex_DEFINED
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#include "include/core/SkTypes.h"
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#include "include/private/SkMacros.h"
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#include "include/private/SkSemaphore.h"
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#include "include/private/SkThreadAnnotations.h"
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#include "include/private/SkThreadID.h"
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class SK_CAPABILITY("mutex") SkMutex {
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public:
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constexpr SkMutex() = default;
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void acquire() SK_ACQUIRE() {
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fSemaphore.wait();
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SkDEBUGCODE(fOwner = SkGetThreadID();)
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}
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void release() SK_RELEASE_CAPABILITY() {
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this->assertHeld();
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SkDEBUGCODE(fOwner = kIllegalThreadID;)
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fSemaphore.signal();
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}
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void assertHeld() SK_ASSERT_CAPABILITY(this) {
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SkASSERT(fOwner == SkGetThreadID());
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}
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private:
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SkSemaphore fSemaphore{1};
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SkDEBUGCODE(SkThreadID fOwner{kIllegalThreadID};)
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};
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class SK_SCOPED_CAPABILITY SkAutoMutexExclusive {
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public:
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SkAutoMutexExclusive(SkMutex& mutex) SK_ACQUIRE(mutex) : fMutex(mutex) { fMutex.acquire(); }
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~SkAutoMutexExclusive() SK_RELEASE_CAPABILITY() { fMutex.release(); }
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SkAutoMutexExclusive(const SkAutoMutexExclusive&) = delete;
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SkAutoMutexExclusive(SkAutoMutexExclusive&&) = delete;
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SkAutoMutexExclusive& operator=(const SkAutoMutexExclusive&) = delete;
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SkAutoMutexExclusive& operator=(SkAutoMutexExclusive&&) = delete;
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private:
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SkMutex& fMutex;
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};
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#endif // SkMutex_DEFINED
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