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/*
* Copyright 2017 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/thread.h"
#import <Foundation/Foundation.h>
#include "rtc_base/platform_thread.h"
/*
* This file contains platform-specific implementations for several
* methods in rtc::Thread.
*/
namespace {
void InitCocoaMultiThreading() {
if ([NSThread isMultiThreaded] == NO) {
// The sole purpose of this autorelease pool is to avoid a console
// message on Leopard that tells us we're autoreleasing the thread
// with no autorelease pool in place.
@autoreleasepool {
[NSThread detachNewThreadSelector:@selector(class)
toTarget:[NSObject class]
withObject:nil];
}
}
RTC_DCHECK([NSThread isMultiThreaded]);
}
}
namespace rtc {
ThreadManager::ThreadManager() {
main_thread_ref_ = CurrentThreadRef();
pthread_key_create(&key_, nullptr);
// This is necessary to alert the cocoa runtime of the fact that
// we are running in a multithreaded environment.
InitCocoaMultiThreading();
}
// static
void* Thread::PreRun(void* pv) {
ThreadInit* init = static_cast<ThreadInit*>(pv);
ThreadManager::Instance()->SetCurrentThread(init->thread);
rtc::SetCurrentThreadName(init->thread->name_.c_str());
@autoreleasepool {
if (init->runnable) {
init->runnable->Run(init->thread);
} else {
init->thread->Run();
}
}
delete init;
return nullptr;
}
bool Thread::ProcessMessages(int cmsLoop) {
int64_t msEnd = (kForever == cmsLoop) ? 0 : TimeAfter(cmsLoop);
int cmsNext = cmsLoop;
while (true) {
@autoreleasepool {
Message msg;
if (!Get(&msg, cmsNext))
return !IsQuitting();
Dispatch(&msg);
if (cmsLoop != kForever) {
cmsNext = static_cast<int>(TimeUntil(msEnd));
if (cmsNext < 0)
return true;
}
}
}
}
} // namespace rtc
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