--- /dev/null
+// Copyright (c) 2012 Marshall A. Greenblatt. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the name Chromium Embedded
+// Framework nor the names of its contributors may be used to endorse
+// or promote products derived from this software without specific prior
+// written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+#ifndef CEF_INCLUDE_CEF_BASE_H_
+#define CEF_INCLUDE_CEF_BASE_H_
+#pragma once
+
+#include "include/base/cef_atomic_ref_count.h"
+#include "include/base/cef_build.h"
+#include "include/base/cef_macros.h"
+
+// Bring in common C++ type definitions used by CEF consumers.
+#include "include/internal/cef_ptr.h"
+#include "include/internal/cef_types_wrappers.h"
+#if defined(OS_WIN)
+#include "include/internal/cef_win.h"
+#elif defined(OS_MACOSX)
+#include "include/internal/cef_mac.h"
+#elif defined(OS_LINUX)
+#include "include/internal/cef_linux.h"
+#endif
+
+///
+// All ref-counted framework classes must extend this class.
+///
+class CefBaseRefCounted {
+ public:
+ ///
+ // Called to increment the reference count for the object. Should be called
+ // for every new copy of a pointer to a given object.
+ ///
+ virtual void AddRef() const =0;
+
+ ///
+ // Called to decrement the reference count for the object. Returns true if
+ // the reference count is 0, in which case the object should self-delete.
+ ///
+ virtual bool Release() const =0;
+
+ ///
+ // Returns true if the reference count is 1.
+ ///
+ virtual bool HasOneRef() const =0;
+
+ protected:
+ virtual ~CefBaseRefCounted() {}
+};
+
+///
+// All scoped framework classes must extend this class.
+///
+class CefBaseScoped {
+ public:
+ virtual ~CefBaseScoped() {}
+};
+
+///
+// Class that implements atomic reference counting.
+///
+class CefRefCount {
+ public:
+ CefRefCount() : ref_count_(0) {}
+
+ ///
+ // Increment the reference count.
+ ///
+ void AddRef() const {
+ base::AtomicRefCountInc(&ref_count_);
+ }
+
+ ///
+ // Decrement the reference count. Returns true if the reference count is 0.
+ ///
+ bool Release() const {
+ return !base::AtomicRefCountDec(&ref_count_);
+ }
+
+ ///
+ // Returns true if the reference count is 1.
+ ///
+ bool HasOneRef() const {
+ return base::AtomicRefCountIsOne(&ref_count_);
+ }
+
+ private:
+ mutable base::AtomicRefCount ref_count_;
+ DISALLOW_COPY_AND_ASSIGN(CefRefCount);
+};
+
+///
+// Macro that provides a reference counting implementation for classes extending
+// CefBase.
+///
+#define IMPLEMENT_REFCOUNTING(ClassName) \
+ public: \
+ void AddRef() const OVERRIDE { \
+ ref_count_.AddRef(); \
+ } \
+ bool Release() const OVERRIDE { \
+ if (ref_count_.Release()) { \
+ delete static_cast<const ClassName*>(this); \
+ return true; \
+ } \
+ return false; \
+ } \
+ bool HasOneRef() const OVERRIDE { \
+ return ref_count_.HasOneRef(); \
+ } \
+ private: \
+ CefRefCount ref_count_;
+
+///
+// Macro that provides a locking implementation. Use the Lock() and Unlock()
+// methods to protect a section of code from simultaneous access by multiple
+// threads. The AutoLock class is a helper that will hold the lock while in
+// scope.
+//
+// THIS MACRO IS DEPRECATED. Use an explicit base::Lock member variable and
+// base::AutoLock instead. For example:
+//
+// #include "include/base/cef_lock.h"
+//
+// // Class declaration.
+// class MyClass : public CefBaseRefCounted {
+// public:
+// MyClass() : value_(0) {}
+// // Method that may be called on multiple threads.
+// void IncrementValue();
+// private:
+// // Value that may be accessed on multiple theads.
+// int value_;
+// // Lock used to protect access to |value_|.
+// base::Lock lock_;
+// IMPLEMENT_REFCOUNTING(MyClass);
+// };
+//
+// // Class implementation.
+// void MyClass::IncrementValue() {
+// // Acquire the lock for the scope of this method.
+// base::AutoLock lock_scope(lock_);
+// // |value_| can now be modified safely.
+// value_++;
+// }
+///
+#define IMPLEMENT_LOCKING(ClassName) \
+ public: \
+ class AutoLock { \
+ public: \
+ explicit AutoLock(ClassName* base) : base_(base) { base_->Lock(); } \
+ ~AutoLock() { base_->Unlock(); } \
+ private: \
+ ClassName* base_; \
+ DISALLOW_COPY_AND_ASSIGN(AutoLock); \
+ }; \
+ void Lock() { lock_.Acquire(); } \
+ void Unlock() { lock_.Release(); } \
+ private: \
+ base::Lock lock_;
+
+#endif // CEF_INCLUDE_CEF_BASE_H_
projects / casparcg / blobdiff