| // |
| // detail/impl/win_thread.ipp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2015 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 |