mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-24 12:52:07 +00:00
96f95b9f95
* result: try out some experimental shenanigans * result: sketch out some more shenanigans * result: see what it looks like to convert kernel to use result conds instead of guards * make rest of kernel use experimental new macro-ing
102 lines
3.9 KiB
C++
102 lines
3.9 KiB
C++
/*
|
|
* Copyright (c) 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 <mesosphere.hpp>
|
|
|
|
namespace ams::kern {
|
|
|
|
namespace {
|
|
|
|
class ThreadQueueImplForKWaitObjectSynchronize final : public KThreadQueueWithoutEndWait {
|
|
private:
|
|
KThread::WaiterList *m_wait_list;
|
|
KThread **m_thread;
|
|
public:
|
|
constexpr ThreadQueueImplForKWaitObjectSynchronize(KThread::WaiterList *wl, KThread **t) : KThreadQueueWithoutEndWait(), m_wait_list(wl), m_thread(t) { /* ... */ }
|
|
|
|
virtual void CancelWait(KThread *waiting_thread, Result wait_result, bool cancel_timer_task) override {
|
|
/* Remove the thread from the wait list. */
|
|
m_wait_list->erase(m_wait_list->iterator_to(*waiting_thread));
|
|
|
|
/* If the result was a timeout and the thread is our wait object thread, cancel recursively. */
|
|
if (svc::ResultTimedOut::Includes(wait_result) && waiting_thread == *m_thread) {
|
|
for (auto &thread : *m_wait_list) {
|
|
thread.CancelWait(svc::ResultTimedOut(), false);
|
|
}
|
|
}
|
|
|
|
/* If the thread is our wait object thread, clear it. */
|
|
if (*m_thread == waiting_thread) {
|
|
*m_thread = nullptr;
|
|
}
|
|
|
|
/* Invoke the base cancel wait handler. */
|
|
KThreadQueue::CancelWait(waiting_thread, wait_result, cancel_timer_task);
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
Result KWaitObject::Synchronize(s64 timeout) {
|
|
/* Perform the wait. */
|
|
KHardwareTimer *timer;
|
|
KThread *cur_thread = GetCurrentThreadPointer();
|
|
ThreadQueueImplForKWaitObjectSynchronize wait_queue(std::addressof(m_wait_list), std::addressof(m_next_thread));
|
|
|
|
{
|
|
KScopedSchedulerLockAndSleep slp(std::addressof(timer), cur_thread, timeout);
|
|
|
|
/* Check that the thread isn't terminating. */
|
|
if (cur_thread->IsTerminationRequested()) {
|
|
slp.CancelSleep();
|
|
R_THROW(svc::ResultTerminationRequested());
|
|
}
|
|
|
|
/* Handle the case where timeout is non-negative/infinite. */
|
|
if (timeout >= 0) {
|
|
/* Check if we're already waiting. */
|
|
if (m_next_thread != nullptr) {
|
|
slp.CancelSleep();
|
|
R_THROW(svc::ResultBusy());
|
|
}
|
|
|
|
/* If timeout is zero, handle the special case by canceling all waiting threads. */
|
|
if (timeout == 0) {
|
|
for (auto &thread : m_wait_list) {
|
|
thread.CancelWait(svc::ResultTimedOut(), false);
|
|
}
|
|
|
|
slp.CancelSleep();
|
|
R_SUCCEED();
|
|
}
|
|
}
|
|
|
|
/* If the timeout isn't infinite, register it as our next timeout. */
|
|
if (timeout > 0) {
|
|
wait_queue.SetHardwareTimer(timer);
|
|
m_next_thread = cur_thread;
|
|
}
|
|
|
|
/* Add the current thread to our wait list. */
|
|
m_wait_list.push_back(*cur_thread);
|
|
|
|
/* Wait until the timeout occurs. */
|
|
cur_thread->BeginWait(std::addressof(wait_queue));
|
|
}
|
|
|
|
R_SUCCEED();
|
|
}
|
|
|
|
}
|