mirror of
https://github.com/Atmosphere-NX/Atmosphere-libs.git
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106 lines
3.3 KiB
C++
106 lines
3.3 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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#include "os_interrupt_event_target_impl.os.windows.hpp"
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#include "os_timeout_helper.hpp"
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#include "os_giant_lock.hpp"
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namespace ams::os::impl {
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InterruptEventWindowsImpl::InterruptEventWindowsImpl(InterruptName name, EventClearMode clear_mode) {
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const NativeHandle handle = ::OpenEvent(EVENT_MODIFY_STATE | SYNCHRONIZE, FALSE, reinterpret_cast<LPCTSTR>(name));
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AMS_ASSERT(handle != InvalidNativeHandle);
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m_handle = handle;
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m_manual_clear = (clear_mode == EventClearMode_ManualClear);
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}
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InterruptEventWindowsImpl::~InterruptEventWindowsImpl() {
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const auto ret = ::CloseHandle(m_handle);
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AMS_ASSERT(ret != 0);
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AMS_UNUSED(ret);
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}
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bool InterruptEventWindowsImpl::ResetEventSignal() {
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std::scoped_lock lk(GetGiantLock());
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if (auto ret = ::WaitForSingleObject(m_handle, 0); ret == WAIT_OBJECT_0) {
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::ResetEvent(m_handle);
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return true;
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} else {
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return false;
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}
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}
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void InterruptEventWindowsImpl::Clear() {
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const auto ret = ::ResetEvent(m_handle);
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AMS_ASSERT(ret != 0);
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AMS_UNUSED(ret);
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}
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void InterruptEventWindowsImpl::Wait() {
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while (true) {
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/* Continuously wait, until success. */
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auto ret = ::WaitForSingleObject(m_handle, INFINITE);
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AMS_ASSERT(ret == WAIT_OBJECT_0);
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AMS_UNUSED(ret);
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/* If we're not obligated to clear, we're done. */
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if (m_manual_clear) {
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return;
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}
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/* Try to reset. */
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if (this->ResetEventSignal()) {
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return;
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}
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}
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}
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bool InterruptEventWindowsImpl::TryWait() {
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/* If we're auto clear, just try to reset. */
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if (!m_manual_clear) {
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return this->ResetEventSignal();
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}
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const auto ret = ::WaitForSingleObject(m_handle, 0);
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AMS_ASSERT((ret == WAIT_OBJECT_0) || (ret == WAIT_TIMEOUT));
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return ret == WAIT_OBJECT_0;
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}
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bool InterruptEventWindowsImpl::TimedWait(TimeSpan timeout) {
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TimeoutHelper timeout_helper(timeout);
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do {
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if (const auto res = ::WaitForSingleObject(m_handle, timeout_helper.GetTimeLeftOnTarget()); res == WAIT_OBJECT_0) {
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/* If we're not obligated to clear, we're done. */
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if (m_manual_clear) {
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return true;
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}
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/* Try to reset. */
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if (this->ResetEventSignal()) {
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return true;
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}
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}
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} while (!timeout_helper.TimedOut());
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return false;
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}
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}
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