зеркало из https://github.com/mozilla/gecko-dev.git
106 строки
3.1 KiB
C++
106 строки
3.1 KiB
C++
// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/platform_thread.h"
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#include "base/logging.h"
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#include "base/win_util.h"
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namespace {
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// The information on how to set the thread name comes from
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// a MSDN article: http://msdn2.microsoft.com/en-us/library/xcb2z8hs.aspx
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const DWORD kVCThreadNameException = 0x406D1388;
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typedef struct tagTHREADNAME_INFO {
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DWORD dwType; // Must be 0x1000.
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LPCSTR szName; // Pointer to name (in user addr space).
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DWORD dwThreadID; // Thread ID (-1=caller thread).
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DWORD dwFlags; // Reserved for future use, must be zero.
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} THREADNAME_INFO;
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DWORD __stdcall ThreadFunc(void* closure) {
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PlatformThread::Delegate* delegate =
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static_cast<PlatformThread::Delegate*>(closure);
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delegate->ThreadMain();
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return 0;
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}
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} // namespace
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// static
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PlatformThreadId PlatformThread::CurrentId() {
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return GetCurrentThreadId();
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}
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// static
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void PlatformThread::YieldCurrentThread() {
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::Sleep(0);
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}
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// static
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void PlatformThread::Sleep(int duration_ms) {
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::Sleep(duration_ms);
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}
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// static
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void PlatformThread::SetName(const char* name) {
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// The debugger needs to be around to catch the name in the exception. If
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// there isn't a debugger, we are just needlessly throwing an exception.
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if (!::IsDebuggerPresent())
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return;
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THREADNAME_INFO info;
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info.dwType = 0x1000;
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info.szName = name;
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info.dwThreadID = CurrentId();
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info.dwFlags = 0;
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MOZ_SEH_TRY {
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RaiseException(kVCThreadNameException, 0, sizeof(info)/sizeof(DWORD),
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reinterpret_cast<DWORD_PTR*>(&info));
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} MOZ_SEH_EXCEPT(EXCEPTION_CONTINUE_EXECUTION) {
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}
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}
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// static
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bool PlatformThread::Create(size_t stack_size, Delegate* delegate,
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PlatformThreadHandle* thread_handle) {
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unsigned int flags = 0;
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if (stack_size > 0 && win_util::GetWinVersion() >= win_util::WINVERSION_XP) {
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flags = STACK_SIZE_PARAM_IS_A_RESERVATION;
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} else {
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stack_size = 0;
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}
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// Using CreateThread here vs _beginthreadex makes thread creation a bit
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// faster and doesn't require the loader lock to be available. Our code will
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// have to work running on CreateThread() threads anyway, since we run code
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// on the Windows thread pool, etc. For some background on the difference:
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// http://www.microsoft.com/msj/1099/win32/win321099.aspx
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*thread_handle = CreateThread(
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NULL, stack_size, ThreadFunc, delegate, flags, NULL);
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return *thread_handle != NULL;
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}
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// static
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bool PlatformThread::CreateNonJoinable(size_t stack_size, Delegate* delegate) {
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PlatformThreadHandle thread_handle;
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bool result = Create(stack_size, delegate, &thread_handle);
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CloseHandle(thread_handle);
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return result;
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}
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// static
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void PlatformThread::Join(PlatformThreadHandle thread_handle) {
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DCHECK(thread_handle);
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// Wait for the thread to exit. It should already have terminated but make
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// sure this assumption is valid.
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DWORD result = WaitForSingleObject(thread_handle, INFINITE);
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DCHECK_EQ(WAIT_OBJECT_0, result);
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CloseHandle(thread_handle);
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}
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