Add m-esr52 at 52.6.0

1 files changed, 196 insertions, 0 deletions

diff --git a/gfx/layers/AtomicRefCountedWithFinalize.h b/gfx/layers/AtomicRefCountedWithFinalize.h
new file mode 100644
index 000000000..7bd8f0203
--- /dev/null
+++ b/gfx/layers/AtomicRefCountedWithFinalize.h
@@ -0,0 +1,196 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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)
+      , 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.");
+      mRefCount++;
+      NS_LOG_ADDREF(this, mRefCount, mName, sizeof(*this));
+    }
+
+    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;
+      }
+      NS_LOG_RELEASE(this, currCount, mName);
+
+      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;
+    }
+
+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