blob: b6a4802b48728e8e186ae1b2e3f04248a969000a [file] [log] [blame]
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#define FML_USED_ON_EMBEDDER
#include "flutter/fml/thread.h"
#include "flutter/fml/build_config.h"
#if defined(OS_WIN)
#include <windows.h>
#else
#include <pthread.h>
#endif
#include <memory>
#include <string>
#include "flutter/fml/message_loop.h"
#include "flutter/fml/synchronization/waitable_event.h"
namespace fml {
Thread::Thread(const std::string& name) : joined_(false) {
fml::AutoResetWaitableEvent latch;
fml::RefPtr<fml::TaskRunner> runner;
thread_ = std::make_unique<std::thread>([&latch, &runner, name]() -> void {
SetCurrentThreadName(name);
fml::MessageLoop::EnsureInitializedForCurrentThread();
auto& loop = MessageLoop::GetCurrent();
runner = loop.GetTaskRunner();
latch.Signal();
loop.Run();
});
latch.Wait();
task_runner_ = runner;
}
Thread::~Thread() {
Join();
}
fml::RefPtr<fml::TaskRunner> Thread::GetTaskRunner() const {
return task_runner_;
}
void Thread::Join() {
if (joined_) {
return;
}
joined_ = true;
task_runner_->PostTask([]() { MessageLoop::GetCurrent().Terminate(); });
thread_->join();
}
#if defined(OS_WIN)
// The information on how to set the thread name comes from
// a MSDN article: http://msdn2.microsoft.com/en-us/library/xcb2z8hs.aspx
const DWORD kVCThreadNameException = 0x406D1388;
typedef struct tagTHREADNAME_INFO {
DWORD dwType; // Must be 0x1000.
LPCSTR szName; // Pointer to name (in user addr space).
DWORD dwThreadID; // Thread ID (-1=caller thread).
DWORD dwFlags; // Reserved for future use, must be zero.
} THREADNAME_INFO;
#endif
void Thread::SetCurrentThreadName(const std::string& name) {
if (name == "") {
return;
}
#if OS_MACOSX
pthread_setname_np(name.c_str());
#elif OS_LINUX || OS_ANDROID
pthread_setname_np(pthread_self(), name.c_str());
#elif OS_WIN
THREADNAME_INFO info;
info.dwType = 0x1000;
info.szName = name.c_str();
info.dwThreadID = GetCurrentThreadId();
info.dwFlags = 0;
__try {
RaiseException(kVCThreadNameException, 0, sizeof(info) / sizeof(DWORD),
reinterpret_cast<DWORD_PTR*>(&info));
} __except (EXCEPTION_CONTINUE_EXECUTION) {
}
#else
FML_DLOG(INFO) << "Could not set the thread name to '" << name
<< "' on this platform.";
#endif
}
} // namespace fml