mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-24 04:42:11 +00:00
105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
/*
|
|
* Copyright (c) 2018-2019 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include "impl/os_waitable_object_list.hpp"
|
|
|
|
namespace ams::os {
|
|
|
|
Event::Event(bool a, bool s) : auto_clear(a), signaled(s) {
|
|
new (GetPointer(this->waitable_object_list_storage)) impl::WaitableObjectList();
|
|
}
|
|
|
|
Event::~Event() {
|
|
GetReference(this->waitable_object_list_storage).~WaitableObjectList();
|
|
}
|
|
|
|
void Event::Signal() {
|
|
std::scoped_lock lk(this->lock);
|
|
|
|
/* If we're already signaled, nothing more to do. */
|
|
if (this->signaled) {
|
|
return;
|
|
}
|
|
|
|
this->signaled = true;
|
|
|
|
/* Signal! */
|
|
if (this->auto_clear) {
|
|
/* If we're auto clear, signal one thread, which will clear. */
|
|
this->cv.Signal();
|
|
} else {
|
|
/* If we're manual clear, increment counter and wake all. */
|
|
this->counter++;
|
|
this->cv.Broadcast();
|
|
}
|
|
|
|
/* Wake up whatever manager, if any. */
|
|
GetReference(this->waitable_object_list_storage).SignalAllThreads();
|
|
}
|
|
|
|
void Event::Reset() {
|
|
std::scoped_lock lk(this->lock);
|
|
this->signaled = false;
|
|
}
|
|
|
|
void Event::Wait() {
|
|
std::scoped_lock lk(this->lock);
|
|
|
|
u64 cur_counter = this->counter;
|
|
while (!this->signaled) {
|
|
if (this->counter != cur_counter) {
|
|
break;
|
|
}
|
|
this->cv.Wait(&this->lock);
|
|
}
|
|
|
|
if (this->auto_clear) {
|
|
this->signaled = false;
|
|
}
|
|
}
|
|
|
|
bool Event::TryWait() {
|
|
std::scoped_lock lk(this->lock);
|
|
|
|
const bool success = this->signaled;
|
|
if (this->auto_clear) {
|
|
this->signaled = false;
|
|
}
|
|
|
|
return success;
|
|
}
|
|
|
|
bool Event::TimedWait(u64 ns) {
|
|
TimeoutHelper timeout_helper(ns);
|
|
std::scoped_lock lk(this->lock);
|
|
|
|
u64 cur_counter = this->counter;
|
|
while (!this->signaled) {
|
|
if (this->counter != cur_counter) {
|
|
break;
|
|
}
|
|
if (this->cv.TimedWait(&this->lock, timeout_helper.NsUntilTimeout()) == ConditionVariableStatus::TimedOut) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (this->auto_clear) {
|
|
this->signaled = false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
}
|