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/*
* Copyright (C) 2008, 2009, 2014 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 <string.h>
namespace WTF {
struct NewThreadContext {
WTF_MAKE_FAST_ALLOCATED;
public:
const char* name;
std::function<void()> entryPoint;
Mutex creationMutex;
};
static void threadEntryPoint(void* contextData)
{
NewThreadContext* context = static_cast<NewThreadContext*>(contextData);
// Block until our creating thread has completed any extra setup work, including
// establishing ThreadIdentifier.
{
MutexLocker locker(context->creationMutex);
}
initializeCurrentThreadInternal(context->name);
auto entryPoint = WTFMove(context->entryPoint);
// Delete the context before starting the thread.
delete context;
entryPoint();
}
ThreadIdentifier createThread(const char* name, std::function<void()> entryPoint)
{
// 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 && PLATFORM(WIN)
if (name && 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 { name, WTFMove(entryPoint), { } };
// Prevent the thread body from executing until we've established the thread identifier.
MutexLocker locker(context->creationMutex);
return createThreadInternal(threadEntryPoint, context, name);
}
ThreadIdentifier createThread(ThreadFunction entryPoint, void* data, const char* name)
{
return createThread(name, [entryPoint, data] {
entryPoint(data);
});
}
void setCurrentThreadIsUserInteractive()
{
#if HAVE(QOS_CLASSES)
pthread_set_qos_class_self_np(QOS_CLASS_USER_INTERACTIVE, 0);
#endif
}
void setCurrentThreadIsUserInitiated()
{
#if HAVE(QOS_CLASSES)
pthread_set_qos_class_self_np(QOS_CLASS_USER_INITIATED, 0);
#endif
}
} // namespace WTF
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