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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /gfx/layers/AtomicRefCountedWithFinalize.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/layers/AtomicRefCountedWithFinalize.h')
-rw-r--r--gfx/layers/AtomicRefCountedWithFinalize.h207
1 files changed, 207 insertions, 0 deletions
diff --git a/gfx/layers/AtomicRefCountedWithFinalize.h b/gfx/layers/AtomicRefCountedWithFinalize.h
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+++ b/gfx/layers/AtomicRefCountedWithFinalize.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MOZILLA_ATOMICREFCOUNTEDWITHFINALIZE_H_
+#define MOZILLA_ATOMICREFCOUNTEDWITHFINALIZE_H_
+
+#include "mozilla/RefPtr.h"
+#include "mozilla/Likely.h"
+#include "MainThreadUtils.h"
+#include "base/message_loop.h"
+#include "base/task.h"
+#include "mozilla/gfx/Logging.h"
+
+#define ADDREF_MANUALLY(obj) \
+ (obj)->AddRefManually(__FUNCTION__, __FILE__, __LINE__)
+#define RELEASE_MANUALLY(obj) \
+ (obj)->ReleaseManually(__FUNCTION__, __FILE__, __LINE__)
+
+namespace mozilla {
+
+template <class U>
+class StaticRefPtr;
+
+namespace gl {
+template <typename T>
+class RefSet;
+
+template <typename T>
+class RefQueue;
+} // namespace gl
+
+template <typename T>
+class AtomicRefCountedWithFinalize {
+ protected:
+ explicit AtomicRefCountedWithFinalize(const char* aName)
+ : mRecycleCallback(nullptr),
+ mClosure(nullptr),
+ mRefCount(0)
+#ifdef DEBUG
+ ,
+ mSpew(false),
+ mManualAddRefs(0),
+ mManualReleases(0)
+#endif
+#ifdef NS_BUILD_REFCNT_LOGGING
+ ,
+ mName(aName)
+#endif
+ {
+ }
+
+ ~AtomicRefCountedWithFinalize() {
+ if (mRefCount >= 0) {
+ gfxCriticalError() << "Deleting referenced object? " << mRefCount;
+ }
+ }
+
+ public:
+ // Mark user classes that are considered flawless.
+ template <class U>
+ friend class ::mozilla::StaticRefPtr;
+
+ template <class U>
+ friend struct mozilla::RefPtrTraits;
+
+ template <typename U>
+ friend class ::mozilla::gl::RefSet;
+
+ template <typename U>
+ friend class ::mozilla::gl::RefQueue;
+
+ // friend class mozilla::gl::SurfaceFactory;
+
+ void AddRefManually(const char* funcName, const char* fileName,
+ uint32_t lineNum) {
+#ifdef DEBUG
+ uint32_t count = ++mManualAddRefs;
+ if (mSpew) {
+ printf_stderr("AddRefManually() #%u in %s at %s:%u\n", count, funcName,
+ fileName, lineNum);
+ }
+#else
+ (void)funcName;
+ (void)fileName;
+ (void)lineNum;
+#endif
+ AddRef();
+ }
+
+ void ReleaseManually(const char* funcName, const char* fileName,
+ uint32_t lineNum) {
+#ifdef DEBUG
+ uint32_t count = ++mManualReleases;
+ if (mSpew) {
+ printf_stderr("ReleaseManually() #%u in %s at %s:%u\n", count, funcName,
+ fileName, lineNum);
+ }
+#else
+ (void)funcName;
+ (void)fileName;
+ (void)lineNum;
+#endif
+ Release();
+ }
+
+ private:
+ void AddRef() {
+ MOZ_ASSERT(mRefCount >= 0, "AddRef() during/after Finalize()/dtor.");
+#ifdef NS_BUILD_REFCNT_LOGGING
+ int currCount = ++mRefCount;
+ NS_LOG_ADDREF(this, currCount, mName, sizeof(*this));
+#else
+ ++mRefCount;
+#endif
+ }
+
+ void Release() {
+ MOZ_ASSERT(mRefCount > 0, "Release() during/after Finalize()/dtor.");
+ // Read mRecycleCallback early so that it does not get set to
+ // deleted memory, if the object is goes away. See bug 994903.
+ // This saves us in the case where there is no callback, so that
+ // we can do the "else if" below.
+ RecycleCallback recycleCallback = mRecycleCallback;
+ int currCount = --mRefCount;
+ if (currCount < 0) {
+ gfxCriticalError() << "Invalid reference count release" << currCount;
+ ++mRefCount;
+ return;
+ }
+#ifdef NS_BUILD_REFCNT_LOGGING
+ NS_LOG_RELEASE(this, currCount, mName);
+#endif
+
+ if (0 == currCount) {
+ mRefCount = detail::DEAD;
+ MOZ_ASSERT(IsDead());
+
+ // Recycle listeners must call ClearRecycleCallback
+ // before releasing their strong reference.
+ if (mRecycleCallback) {
+ gfxCriticalError() << "About to release with valid callback";
+ mRecycleCallback = nullptr;
+ }
+
+ MOZ_ASSERT(mManualAddRefs == mManualReleases);
+
+ T* derived = static_cast<T*>(this);
+ derived->Finalize();
+ delete derived;
+ } else if (1 == currCount && recycleCallback) {
+ // There is nothing enforcing this in the code, except how the callers
+ // are being careful to never let the reference count go down if there
+ // is a callback.
+ MOZ_ASSERT(!IsDead());
+ T* derived = static_cast<T*>(this);
+ recycleCallback(derived, mClosure);
+ }
+ }
+
+ public:
+ typedef void (*RecycleCallback)(T* aObject, void* aClosure);
+ /**
+ * Set a callback responsible for recycling this object
+ * before it is finalized.
+ */
+ void SetRecycleCallback(RecycleCallback aCallback, void* aClosure) {
+ MOZ_ASSERT(!IsDead());
+ mRecycleCallback = aCallback;
+ mClosure = aClosure;
+ }
+ void ClearRecycleCallback() {
+ MOZ_ASSERT(!IsDead());
+ SetRecycleCallback(nullptr, nullptr);
+ }
+
+ bool HasRecycleCallback() const {
+ MOZ_ASSERT(!IsDead());
+ return !!mRecycleCallback;
+ }
+
+ bool IsDead() const { return mRefCount < 0; }
+
+ bool HasOneRef() const { return mRefCount == 1; }
+
+ private:
+ RecycleCallback mRecycleCallback;
+ void* mClosure;
+ Atomic<int> mRefCount;
+#ifdef DEBUG
+ public:
+ bool mSpew;
+
+ private:
+ Atomic<uint32_t> mManualAddRefs;
+ Atomic<uint32_t> mManualReleases;
+#endif
+#ifdef NS_BUILD_REFCNT_LOGGING
+ const char* mName;
+#endif
+};
+
+} // namespace mozilla
+
+#endif