155 lines
5.6 KiB
C++
155 lines
5.6 KiB
C++
// Copyright (c) 2011 Marshall A. Greenblatt. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the name Chromium Embedded
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// Framework nor the names of its contributors may be used to endorse
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// or promote products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// ---------------------------------------------------------------------------
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//
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// The contents of this file must follow a specific format in order to
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// support the CEF translator tool. See the translator.README.txt file in the
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// tools directory for more information.
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//
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#ifndef CEF_INCLUDE_CEF_BASE_H_
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#define CEF_INCLUDE_CEF_BASE_H_
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#pragma once
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#include "include/internal/cef_build.h"
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#include "include/internal/cef_ptr.h"
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#include "include/internal/cef_types_wrappers.h"
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// Bring in platform-specific definitions.
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#if defined(OS_WIN)
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#include "include/internal/cef_win.h"
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#elif defined(OS_MACOSX)
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#include "include/internal/cef_mac.h"
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#elif defined(OS_LINUX)
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#include "include/internal/cef_linux.h"
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#endif
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///
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// Interface defining the reference count implementation methods. All framework
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// classes must extend the CefBase class.
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///
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class CefBase {
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public:
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///
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// The AddRef method increments the reference count for the object. It should
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// be called for every new copy of a pointer to a given object. The resulting
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// reference count value is returned and should be used for diagnostic/testing
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// purposes only.
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///
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virtual int AddRef() =0;
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///
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// The Release method decrements the reference count for the object. If the
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// reference count on the object falls to 0, then the object should free
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// itself from memory. The resulting reference count value is returned and
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// should be used for diagnostic/testing purposes only.
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///
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virtual int Release() =0;
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///
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// Return the current number of references.
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///
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virtual int GetRefCt() =0;
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protected:
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virtual ~CefBase() {}
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};
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///
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// Class that implements atomic reference counting.
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///
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class CefRefCount {
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public:
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CefRefCount() : refct_(0) {}
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///
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// Atomic reference increment.
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///
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int AddRef() {
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return CefAtomicIncrement(&refct_);
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}
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///
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// Atomic reference decrement. Delete the object when no references remain.
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///
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int Release() {
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return CefAtomicDecrement(&refct_);
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}
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///
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// Return the current number of references.
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///
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int GetRefCt() { return refct_; }
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private:
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long refct_; // NOLINT(runtime/int)
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};
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///
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// Macro that provides a reference counting implementation for classes extending
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// CefBase.
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///
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#define IMPLEMENT_REFCOUNTING(ClassName) \
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public: \
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int AddRef() { return refct_.AddRef(); } \
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int Release() { \
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int retval = refct_.Release(); \
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if (retval == 0) \
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delete this; \
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return retval; \
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} \
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int GetRefCt() { return refct_.GetRefCt(); } \
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private: \
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CefRefCount refct_;
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///
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// Macro that provides a locking implementation. Use the Lock() and Unlock()
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// methods to protect a section of code from simultaneous access by multiple
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// threads. The AutoLock class is a helper that will hold the lock while in
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// scope.
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///
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#define IMPLEMENT_LOCKING(ClassName) \
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public: \
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class AutoLock { \
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public: \
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explicit AutoLock(ClassName* base) : base_(base) { base_->Lock(); } \
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~AutoLock() { base_->Unlock(); } \
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private: \
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ClassName* base_; \
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}; \
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void Lock() { critsec_.Lock(); } \
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void Unlock() { critsec_.Unlock(); } \
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private: \
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CefCriticalSection critsec_;
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#endif // CEF_INCLUDE_CEF_BASE_H_
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