| /* |
| * Copyright (C) 2008, 2009 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS 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. |
| */ |
| |
| #include "config.h" |
| #include "Threading.h" |
| #include <wtf/OwnPtr.h> |
| #include <wtf/PassOwnPtr.h> |
| |
| #include <string.h> |
| |
| namespace WTF { |
| |
| struct NewThreadContext { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| NewThreadContext(ThreadFunction entryPoint, void* data, const char* name) |
| : entryPoint(entryPoint) |
| , data(data) |
| , name(name) |
| { |
| } |
| |
| ThreadFunction entryPoint; |
| void* data; |
| const char* name; |
| |
| Mutex creationMutex; |
| }; |
| |
| static void threadEntryPoint(void* contextData) |
| { |
| NewThreadContext* context = reinterpret_cast<NewThreadContext*>(contextData); |
| |
| // Block until our creating thread has completed any extra setup work, including |
| // establishing ThreadIdentifier. |
| { |
| MutexLocker locker(context->creationMutex); |
| } |
| |
| initializeCurrentThreadInternal(context->name); |
| |
| // Grab the info that we need out of the context, then deallocate it. |
| ThreadFunction entryPoint = context->entryPoint; |
| void* data = context->data; |
| delete context; |
| |
| entryPoint(data); |
| } |
| |
| ThreadIdentifier createThread(ThreadFunction entryPoint, void* data, const char* name) |
| { |
| // Visual Studio has a 31-character limit on thread names. Longer names will |
| // be truncated silently, but we'd like callers to know about the limit. |
| #if !LOG_DISABLED |
| if (strlen(name) > 31) |
| LOG_ERROR("Thread name \"%s\" is longer than 31 characters and will be truncated by Visual Studio", name); |
| #endif |
| |
| NewThreadContext* context = new NewThreadContext(entryPoint, data, name); |
| |
| // Prevent the thread body from executing until we've established the thread identifier. |
| MutexLocker locker(context->creationMutex); |
| |
| return createThreadInternal(threadEntryPoint, context, name); |
| } |
| |
| #if PLATFORM(MAC) || PLATFORM(WIN) |
| |
| // For ABI compatibility with Safari on Mac / Windows: Safari uses the private |
| // createThread() and waitForThreadCompletion() functions directly and we need |
| // to keep the old ABI compatibility until it's been rebuilt. |
| |
| typedef void* (*ThreadFunctionWithReturnValue)(void* argument); |
| |
| WTF_EXPORT_PRIVATE ThreadIdentifier createThread(ThreadFunctionWithReturnValue entryPoint, void* data, const char* name); |
| |
| struct ThreadFunctionWithReturnValueInvocation { |
| ThreadFunctionWithReturnValueInvocation(ThreadFunctionWithReturnValue function, void* data) |
| : function(function) |
| , data(data) |
| { |
| } |
| |
| ThreadFunctionWithReturnValue function; |
| void* data; |
| }; |
| |
| static void compatEntryPoint(void* param) |
| { |
| // Balanced by .leakPtr() in createThread. |
| OwnPtr<ThreadFunctionWithReturnValueInvocation> invocation = adoptPtr(static_cast<ThreadFunctionWithReturnValueInvocation*>(param)); |
| invocation->function(invocation->data); |
| } |
| |
| ThreadIdentifier createThread(ThreadFunctionWithReturnValue entryPoint, void* data, const char* name) |
| { |
| OwnPtr<ThreadFunctionWithReturnValueInvocation> invocation = adoptPtr(new ThreadFunctionWithReturnValueInvocation(entryPoint, data)); |
| |
| // Balanced by adoptPtr() in compatEntryPoint. |
| return createThread(compatEntryPoint, invocation.leakPtr(), name); |
| } |
| |
| WTF_EXPORT_PRIVATE int waitForThreadCompletion(ThreadIdentifier, void**); |
| |
| int waitForThreadCompletion(ThreadIdentifier threadID, void**) |
| { |
| return waitForThreadCompletion(threadID); |
| } |
| |
| // This function is deprecated but needs to be kept around for backward |
| // compatibility. Use the 3-argument version of createThread above. |
| |
| WTF_EXPORT_PRIVATE ThreadIdentifier createThread(ThreadFunctionWithReturnValue entryPoint, void* data); |
| |
| ThreadIdentifier createThread(ThreadFunctionWithReturnValue entryPoint, void* data) |
| { |
| OwnPtr<ThreadFunctionWithReturnValueInvocation> invocation = adoptPtr(new ThreadFunctionWithReturnValueInvocation(entryPoint, data)); |
| |
| // Balanced by adoptPtr() in compatEntryPoint. |
| return createThread(compatEntryPoint, invocation.leakPtr(), 0); |
| } |
| #endif |
| |
| } // namespace WTF |