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windows_thread_pool.cpp
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windows_thread_pool.cpp
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/*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* Licensed under the Apache License Version 2.0 with LLVM Exceptions
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* https://llvm.org/LICENSE.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <unifex/win32/windows_thread_pool.hpp>
#include <unifex/exception.hpp>
#include <windows.h>
namespace unifex::win32 {
windows_thread_pool::windows_thread_pool() noexcept : threadPool_(nullptr) {
}
windows_thread_pool::windows_thread_pool(
std::uint32_t minThreadCount, std::uint32_t maxThreadCount)
: threadPool_(::CreateThreadpool(nullptr)) {
if (threadPool_ == nullptr) {
DWORD errorCode = ::GetLastError();
throw_(std::system_error{
static_cast<int>(errorCode),
std::system_category(),
"CreateThreadPool()"});
}
::SetThreadpoolThreadMaximum(threadPool_, maxThreadCount);
if (!::SetThreadpoolThreadMinimum(threadPool_, minThreadCount)) {
DWORD errorCode = ::GetLastError();
::CloseThreadpool(threadPool_);
throw_(std::system_error{
static_cast<int>(errorCode),
std::system_category(),
"SetThreadpoolThreadMinimum()"});
}
}
windows_thread_pool::~windows_thread_pool() {
if (threadPool_ != nullptr) {
::CloseThreadpool(threadPool_);
}
}
windows_thread_pool::schedule_op_base::~schedule_op_base() {
::CloseThreadpoolWork(work_);
::DestroyThreadpoolEnvironment(&environ_);
}
void windows_thread_pool::schedule_op_base::start() & noexcept {
::SubmitThreadpoolWork(work_);
}
windows_thread_pool::schedule_op_base::schedule_op_base(
windows_thread_pool& pool, PTP_WORK_CALLBACK workCallback) {
::InitializeThreadpoolEnvironment(&environ_);
::SetThreadpoolCallbackPool(&environ_, pool.threadPool_);
work_ = ::CreateThreadpoolWork(workCallback, this, &environ_);
if (work_ == nullptr) {
// TODO: Should we just cache the error and deliver via set_error(receiver_,
// std::error_code{}) upon start()?
DWORD errorCode = ::GetLastError();
::DestroyThreadpoolEnvironment(&environ_);
throw_(std::system_error{
static_cast<int>(errorCode),
std::system_category(),
"CreateThreadpoolWork()"});
}
}
} // namespace unifex::win32