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111 lines
4.0 KiB
C++
111 lines
4.0 KiB
C++
// Copyright (c) 2014 Marshall A. Greenblatt. Portions copyright (c) 2011
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// Google Inc. 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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// WARNING: You should *NOT* be using this class directly. PlatformThread is
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// the low-level platform-specific abstraction to the OS's threading interface.
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// You should instead be using a message-loop driven Thread, see thread.h.
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#ifndef CEF_INCLUDE_BASE_PLATFORM_THREAD_H_
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#define CEF_INCLUDE_BASE_PLATFORM_THREAD_H_
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#if defined(USING_CHROMIUM_INCLUDES)
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// When building CEF include the Chromium header directly.
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#include "base/threading/platform_thread.h"
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#else // !USING_CHROMIUM_INCLUDES
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// The following is substantially similar to the Chromium implementation.
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// If the Chromium implementation diverges the below implementation should be
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// updated to match.
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#include "include/base/cef_build.h"
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#include "include/internal/cef_thread_internal.h"
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namespace base {
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///
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/// Used for logging. Always an integer value.
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///
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typedef cef_platform_thread_id_t PlatformThreadId;
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///
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/// Used for thread checking and debugging.
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/// Meant to be as fast as possible.
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/// These are produced by PlatformThread::CurrentRef(), and used to later
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/// check if we are on the same thread or not by using ==. These are safe
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/// to copy between threads, but can't be copied to another process as they
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/// have no meaning there. Also, the internal identifier can be re-used
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/// after a thread dies, so a PlatformThreadRef cannot be reliably used
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/// to distinguish a new thread from an old, dead thread.
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///
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class PlatformThreadRef {
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public:
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typedef cef_platform_thread_handle_t RefType;
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PlatformThreadRef() : id_(0) {}
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explicit PlatformThreadRef(RefType id) : id_(id) {}
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bool operator==(PlatformThreadRef other) const { return id_ == other.id_; }
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bool is_null() const { return id_ == 0; }
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private:
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RefType id_;
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};
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///
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/// A namespace for low-level thread functions.
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/// Chromium uses a class with static methods but CEF uses an actual namespace
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/// to avoid linker problems with the sandbox libaries on Windows.
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///
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namespace PlatformThread {
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///
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/// Gets the current thread id, which may be useful for logging purposes.
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///
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inline PlatformThreadId CurrentId() {
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return cef_get_current_platform_thread_id();
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}
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///
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/// Gets the current thread reference, which can be used to check if
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/// we're on the right thread quickly.
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///
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inline PlatformThreadRef CurrentRef() {
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return PlatformThreadRef(cef_get_current_platform_thread_handle());
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}
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} // namespace PlatformThread
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} // namespace base
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#endif // !USING_CHROMIUM_INCLUDES
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#endif // CEF_INCLUDE_BASE_PLATFORM_THREAD_H_
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