зеркало из https://github.com/mozilla/gecko-dev.git
92 строки
3.8 KiB
C++
92 строки
3.8 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef THREADSAFEREFCOUNTINGWITHMAINTHREADDESTRUCTION_H_
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#define THREADSAFEREFCOUNTINGWITHMAINTHREADDESTRUCTION_H_
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#include "base/message_loop.h"
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#include "MainThreadUtils.h"
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#include "nsThreadUtils.h"
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namespace mozilla {
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namespace layers {
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inline MessageLoop* GetMainLoopAssertingMainThread()
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{
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MOZ_ASSERT(NS_IsMainThread());
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return MessageLoop::current();
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}
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inline MessageLoop* GetMainLoop()
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{
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static MessageLoop* sMainLoop = GetMainLoopAssertingMainThread();
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return sMainLoop;
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}
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struct HelperForMainThreadDestruction
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{
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HelperForMainThreadDestruction()
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{
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MOZ_ASSERT(NS_IsMainThread());
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GetMainLoop();
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}
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~HelperForMainThreadDestruction()
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{
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MOZ_ASSERT(NS_IsMainThread());
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}
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};
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template<typename T>
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struct DeleteOnMainThreadTask: public nsRunnable
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{
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T* mToDelete;
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explicit DeleteOnMainThreadTask(T* aToDelete) : mToDelete(aToDelete) {}
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NS_IMETHOD Run() {
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MOZ_ASSERT(NS_IsMainThread());
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mToDelete->DeleteToBeCalledOnMainThread();
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return NS_OK;
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}
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};
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} // namespace layers
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} // namespace mozilla
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#define NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_MAIN_THREAD_DESTRUCTION(_class) \
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public: \
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NS_METHOD_(MozExternalRefCountType) AddRef(void) { \
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MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \
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MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
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nsrefcnt count = ++mRefCnt; \
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NS_LOG_ADDREF(this, count, #_class, sizeof(*this)); \
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return (nsrefcnt) count; \
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} \
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void DeleteToBeCalledOnMainThread() { \
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MOZ_ASSERT(NS_IsMainThread()); \
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NS_LOG_RELEASE(this, 0, #_class); \
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delete this; \
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} \
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NS_METHOD_(MozExternalRefCountType) Release(void) { \
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MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
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nsrefcnt count = --mRefCnt; \
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if (count == 0) { \
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if (NS_IsMainThread()) { \
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DeleteToBeCalledOnMainThread(); \
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} else { \
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NS_DispatchToMainThread( \
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new mozilla::layers::DeleteOnMainThreadTask<_class>(this)); \
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} \
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} else { \
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NS_LOG_RELEASE(this, count, #_class); \
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} \
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return count; \
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} \
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protected: \
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::mozilla::ThreadSafeAutoRefCnt mRefCnt; \
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private: \
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::mozilla::layers::HelperForMainThreadDestruction mHelperForMainThreadDestruction; \
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public:
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#endif
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