151 lines
3.8 KiB
C++
151 lines
3.8 KiB
C++
//
|
|
// detail/impl/win_thread.ipp
|
|
// ~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
//
|
|
// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
|
|
#ifndef ASIO_DETAIL_IMPL_WIN_THREAD_IPP
|
|
#define ASIO_DETAIL_IMPL_WIN_THREAD_IPP
|
|
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
|
|
# pragma once
|
|
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
|
|
|
|
#include "asio/detail/config.hpp"
|
|
|
|
#if defined(ASIO_WINDOWS) \
|
|
&& !defined(ASIO_WINDOWS_APP) \
|
|
&& !defined(UNDER_CE)
|
|
|
|
#include <process.h>
|
|
#include "asio/detail/throw_error.hpp"
|
|
#include "asio/detail/win_thread.hpp"
|
|
#include "asio/error.hpp"
|
|
|
|
#include "asio/detail/push_options.hpp"
|
|
|
|
namespace asio {
|
|
namespace detail {
|
|
|
|
win_thread::~win_thread()
|
|
{
|
|
::CloseHandle(thread_);
|
|
|
|
// The exit_event_ handle is deliberately allowed to leak here since it
|
|
// is an error for the owner of an internal thread not to join() it.
|
|
}
|
|
|
|
void win_thread::join()
|
|
{
|
|
HANDLE handles[2] = { exit_event_, thread_ };
|
|
::WaitForMultipleObjects(2, handles, FALSE, INFINITE);
|
|
::CloseHandle(exit_event_);
|
|
if (terminate_threads())
|
|
{
|
|
::TerminateThread(thread_, 0);
|
|
}
|
|
else
|
|
{
|
|
::QueueUserAPC(apc_function, thread_, 0);
|
|
::WaitForSingleObject(thread_, INFINITE);
|
|
}
|
|
}
|
|
|
|
std::size_t win_thread::hardware_concurrency()
|
|
{
|
|
SYSTEM_INFO system_info;
|
|
::GetSystemInfo(&system_info);
|
|
return system_info.dwNumberOfProcessors;
|
|
}
|
|
|
|
void win_thread::start_thread(func_base* arg, unsigned int stack_size)
|
|
{
|
|
::HANDLE entry_event = 0;
|
|
arg->entry_event_ = entry_event = ::CreateEventW(0, true, false, 0);
|
|
if (!entry_event)
|
|
{
|
|
DWORD last_error = ::GetLastError();
|
|
delete arg;
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
asio::detail::throw_error(ec, "thread.entry_event");
|
|
}
|
|
|
|
arg->exit_event_ = exit_event_ = ::CreateEventW(0, true, false, 0);
|
|
if (!exit_event_)
|
|
{
|
|
DWORD last_error = ::GetLastError();
|
|
delete arg;
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
asio::detail::throw_error(ec, "thread.exit_event");
|
|
}
|
|
|
|
unsigned int thread_id = 0;
|
|
thread_ = reinterpret_cast<HANDLE>(::_beginthreadex(0,
|
|
stack_size, win_thread_function, arg, 0, &thread_id));
|
|
if (!thread_)
|
|
{
|
|
DWORD last_error = ::GetLastError();
|
|
delete arg;
|
|
if (entry_event)
|
|
::CloseHandle(entry_event);
|
|
if (exit_event_)
|
|
::CloseHandle(exit_event_);
|
|
asio::error_code ec(last_error,
|
|
asio::error::get_system_category());
|
|
asio::detail::throw_error(ec, "thread");
|
|
}
|
|
|
|
if (entry_event)
|
|
{
|
|
::WaitForSingleObject(entry_event, INFINITE);
|
|
::CloseHandle(entry_event);
|
|
}
|
|
}
|
|
|
|
unsigned int __stdcall win_thread_function(void* arg)
|
|
{
|
|
win_thread::auto_func_base_ptr func = {
|
|
static_cast<win_thread::func_base*>(arg) };
|
|
|
|
::SetEvent(func.ptr->entry_event_);
|
|
|
|
func.ptr->run();
|
|
|
|
// Signal that the thread has finished its work, but rather than returning go
|
|
// to sleep to put the thread into a well known state. If the thread is being
|
|
// joined during global object destruction then it may be killed using
|
|
// TerminateThread (to avoid a deadlock in DllMain). Otherwise, the SleepEx
|
|
// call will be interrupted using QueueUserAPC and the thread will shut down
|
|
// cleanly.
|
|
HANDLE exit_event = func.ptr->exit_event_;
|
|
delete func.ptr;
|
|
func.ptr = 0;
|
|
::SetEvent(exit_event);
|
|
::SleepEx(INFINITE, TRUE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(WINVER) && (WINVER < 0x0500)
|
|
void __stdcall apc_function(ULONG) {}
|
|
#else
|
|
void __stdcall apc_function(ULONG_PTR) {}
|
|
#endif
|
|
|
|
} // namespace detail
|
|
} // namespace asio
|
|
|
|
#include "asio/detail/pop_options.hpp"
|
|
|
|
#endif // defined(ASIO_WINDOWS)
|
|
// && !defined(ASIO_WINDOWS_APP)
|
|
// && !defined(UNDER_CE)
|
|
|
|
#endif // ASIO_DETAIL_IMPL_WIN_THREAD_IPP
|