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// Copyright (c) 2011 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.
//
// ---------------------------------------------------------------------------
//
// The contents of this file must follow a specific format in order to
// support the CEF translator tool. See the translator.README.txt file in the
// tools directory for more information.
//
#ifndef CEF_INCLUDE_CEF_BASE_H_
#define CEF_INCLUDE_CEF_BASE_H_
#pragma once
#include "include/internal/cef_build.h"
#include "include/internal/cef_ptr.h"
#include "include/internal/cef_types_wrappers.h"
// Bring in platform-specific definitions.
#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
///
// Interface defining the reference count implementation methods. All framework
// classes must extend the CefBase class.
///
class CefBase {
public:
///
// The AddRef method increments the reference count for the object. It should
// be called for every new copy of a pointer to a given object. The resulting
// reference count value is returned and should be used for diagnostic/testing
// purposes only.
///
virtual int AddRef() =0;
///
// The Release method decrements the reference count for the object. If the
// reference count on the object falls to 0, then the object should free
// itself from memory. The resulting reference count value is returned and
// should be used for diagnostic/testing purposes only.
///
virtual int Release() =0;
///
// Return the current number of references.
///
virtual int GetRefCt() =0;
protected:
virtual ~CefBase() {}
};
///
// Class that implements atomic reference counting.
///
class CefRefCount {
public:
CefRefCount() : refct_(0) {}
///
// Atomic reference increment.
///
int AddRef() {
return CefAtomicIncrement(&refct_);
}
///
// Atomic reference decrement. Delete the object when no references remain.
///
int Release() {
return CefAtomicDecrement(&refct_);
}
///
// Return the current number of references.
///
int GetRefCt() { return refct_; }
private:
long refct_; // NOLINT(runtime/int)
};
///
// Macro that provides a reference counting implementation for classes extending
// CefBase.
///
#define IMPLEMENT_REFCOUNTING(ClassName) \
public: \
int AddRef() { return refct_.AddRef(); } \
int Release() { \
int retval = refct_.Release(); \
if (retval == 0) \
delete this; \
return retval; \
} \
int GetRefCt() { return refct_.GetRefCt(); } \
private: \
CefRefCount refct_;
///
// 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.
///
#define IMPLEMENT_LOCKING(ClassName) \
public: \
class AutoLock { \
public: \
explicit AutoLock(ClassName* base) : base_(base) { base_->Lock(); } \
~AutoLock() { base_->Unlock(); } \
private: \
ClassName* base_; \
}; \
void Lock() { critsec_.Lock(); } \
void Unlock() { critsec_.Unlock(); } \
private: \
CefCriticalSection critsec_;
#endif // CEF_INCLUDE_CEF_BASE_H_