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https://github.com/Atmosphere-NX/Atmosphere.git
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84 lines
3 KiB
C++
84 lines
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 <mesosphere.hpp>
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namespace ams::kern {
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namespace {
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class ThreadQueueImplForKLightConditionVariable final : public KThreadQueue {
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private:
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KThread::WaiterList *m_wait_list;
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bool m_allow_terminating_thread;
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public:
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constexpr ThreadQueueImplForKLightConditionVariable(KThread::WaiterList *wl, bool term) : KThreadQueue(), m_wait_list(wl), m_allow_terminating_thread(term) { /* ... */ }
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virtual void CancelWait(KThread *waiting_thread, Result wait_result, bool cancel_timer_task) override {
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/* Only process waits if we're allowed to. */
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if (svc::ResultTerminationRequested::Includes(wait_result) && m_allow_terminating_thread) {
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return;
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}
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/* Remove the thread from the waiting thread from the light condition variable. */
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m_wait_list->erase(m_wait_list->iterator_to(*waiting_thread));
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/* Invoke the base cancel wait handler. */
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KThreadQueue::CancelWait(waiting_thread, wait_result, cancel_timer_task);
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}
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};
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}
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void KLightConditionVariable::Wait(KLightLock *lock, s64 timeout, bool allow_terminating_thread) {
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/* Create thread queue. */
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KThread *owner = GetCurrentThreadPointer();
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KHardwareTimer *timer;
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ThreadQueueImplForKLightConditionVariable wait_queue(std::addressof(m_wait_list), allow_terminating_thread);
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/* Sleep the thread. */
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{
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KScopedSchedulerLockAndSleep lk(&timer, owner, timeout);
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if (!allow_terminating_thread && owner->IsTerminationRequested()) {
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lk.CancelSleep();
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return;
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}
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lock->Unlock();
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/* Add the thread to the queue. */
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m_wait_list.push_back(*owner);
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/* Begin waiting. */
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wait_queue.SetHardwareTimer(timer);
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owner->BeginWait(std::addressof(wait_queue));
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}
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/* Re-acquire the lock. */
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lock->Lock();
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}
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void KLightConditionVariable::Broadcast() {
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KScopedSchedulerLock lk;
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/* Signal all threads. */
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for (auto it = m_wait_list.begin(); it != m_wait_list.end(); it = m_wait_list.erase(it)) {
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it->EndWait(ResultSuccess());
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}
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}
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}
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