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// 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.

// WARNING: You should *NOT* be using this class directly. PlatformThread is

// the low-level platform-specific abstraction to the OS's threading interface.

// You should instead be using a message-loop driven Thread, see thread.h.

#ifndef CEF_INCLUDE_BASE_PLATFORM_THREAD_H_

#define CEF_INCLUDE_BASE_PLATFORM_THREAD_H_

#if defined(BASE_THREADING_PLATFORM_THREAD_H_)

// Do nothing if the Chromium header has already been included.

// This can happen in cases where Chromium code is used directly by the

// client application. When using Chromium code directly always include

// the Chromium header first to avoid type conflicts.

#elif defined(USING_CHROMIUM_INCLUDES)

// When building CEF include the Chromium header directly.

#include "base/threading/platform_thread.h"

#else // !USING_CHROMIUM_INCLUDES

// The following is substantially similar to the Chromium implementation.

// If the Chromium implementation diverges the below implementation should be

// updated to match.

#include "include/base/cef_basictypes.h"

#include "include/base/cef_build.h"

#include "include/internal/cef_thread_internal.h"

namespace base {

// Used for logging. Always an integer value.

typedef cef_platform_thread_id_t PlatformThreadId;

// Used for thread checking and debugging.

// Meant to be as fast as possible.

// These are produced by PlatformThread::CurrentRef(), and used to later

// check if we are on the same thread or not by using ==. These are safe

// to copy between threads, but can't be copied to another process as they

// have no meaning there. Also, the internal identifier can be re-used

// after a thread dies, so a PlatformThreadRef cannot be reliably used

// to distinguish a new thread from an old, dead thread.

class PlatformThreadRef {

public:

typedef cef_platform_thread_handle_t RefType;

PlatformThreadRef()

: id_(0) {

}

explicit PlatformThreadRef(RefType id)

: id_(id) {

}

bool operator==(PlatformThreadRef other) const {

return id_ == other.id_;

}

bool is_null() const {

return id_ == 0;

}

private:

RefType id_;

};

// A namespace for low-level thread functions.

// Chromium uses a class with static methods but CEF uses an actual namespace

// to avoid linker problems with the sandbox libaries on Windows.

namespace PlatformThread {

// Gets the current thread id, which may be useful for logging purposes.

inline PlatformThreadId CurrentId() {

return cef_get_current_platform_thread_id();

}

// Gets the current thread reference, which can be used to check if

// we're on the right thread quickly.

inline PlatformThreadRef CurrentRef() {

return PlatformThreadRef(cef_get_current_platform_thread_handle());

}

} // namespace PlatformThread

} // namespace base

#endif // !USING_CHROMIUM_INCLUDES

#endif // CEF_INCLUDE_BASE_PLATFORM_THREAD_H_

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