159 lines
4.2 KiB
C++
159 lines
4.2 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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 <https://www.gnu.org/licenses/>.
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*/
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/** Timer management system. */
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#include <loguru.hpp>
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#include "timermanager.h"
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#include <cinttypes>
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#include <memory>
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#include <mutex>
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TimerManager* TimerManager::timer_manager;
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uint32_t TimerManager::add_oneshot_timer(uint64_t timeout, timer_cb cb)
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{
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TimerInfo* ti = new TimerInfo;
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ti->id = ++this->id;
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ti->timeout_ns = this->get_time_now() + timeout;
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ti->interval_ns = 0;
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ti->cb = cb;
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std::shared_ptr<TimerInfo> timer_desc(ti);
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// add new timer to the timer queue
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this->timer_queue.push(timer_desc);
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// notify listeners about changes in the timer queue
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if (!this->cb_active) {
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this->notify_timer_changes();
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}
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return ti->id;
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}
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uint32_t TimerManager::add_immediate_timer(timer_cb cb) {
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TimerInfo* ti = new TimerInfo;
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ti->id = ++this->id;
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ti->timeout_ns = this->get_time_now();
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ti->interval_ns = 0;
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ti->cb = cb;
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std::shared_ptr<TimerInfo> timer_desc(ti);
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// add new timer to the timer queue
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this->timer_queue.push(timer_desc);
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// notify listeners about changes in the timer queue
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if (!this->cb_active) {
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this->notify_timer_changes();
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}
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return ti->id;
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}
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uint32_t TimerManager::add_cyclic_timer(uint64_t interval, uint64_t delay, timer_cb cb)
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{
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TimerInfo* ti = new TimerInfo;
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ti->id = ++this->id;
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ti->timeout_ns = this->get_time_now() + delay;
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ti->interval_ns = interval;
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ti->cb = cb;
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std::shared_ptr<TimerInfo> timer_desc(ti);
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// add new timer to the timer queue
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this->timer_queue.push(timer_desc);
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// notify listeners about changes in the timer queue
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if (!this->cb_active) {
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this->notify_timer_changes();
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}
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return ti->id;
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}
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uint32_t TimerManager::add_cyclic_timer(uint64_t interval, timer_cb cb) {
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return this->add_cyclic_timer(interval, interval, cb);
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}
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void TimerManager::cancel_timer(uint32_t id)
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{
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this->timer_queue.remove_by_id(id);
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if (!this->cb_active) {
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this->notify_timer_changes();
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}
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}
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uint64_t TimerManager::process_timers()
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{
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std::shared_ptr<TimerInfo> cur_timer;
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uint64_t time_now = get_time_now();
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{ // mtx scope
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std::lock_guard<std::recursive_mutex> lk(this->timer_queue.get_mtx());
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if (this->timer_queue.empty()) {
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return 0ULL;
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}
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// scan for expired timers
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cur_timer = this->timer_queue.top();
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} // ] mtx scope
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while (cur_timer->timeout_ns <= time_now) {
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timer_cb cb = cur_timer->cb;
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// re-arm cyclic timers
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if (cur_timer->interval_ns) {
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std::lock_guard<std::recursive_mutex> lk(this->timer_queue.get_mtx());
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cur_timer->timeout_ns = time_now + cur_timer->interval_ns;
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this->timer_queue.remove_by_id(cur_timer->id);
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this->timer_queue.push(cur_timer);
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} else {
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// remove one-shot timers from queue
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this->timer_queue.pop();
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}
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this->cb_active = true;
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// invoke timer callback
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cb();
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this->cb_active = false;
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// process next timer
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{ // [ mtx scope
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std::lock_guard<std::recursive_mutex> lk(this->timer_queue.get_mtx());
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if (this->timer_queue.empty()) {
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return 0ULL;
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}
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cur_timer = this->timer_queue.top();
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} // ] mtx scope
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}
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// return time slice in nanoseconds until next timer's expiry
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return cur_timer->timeout_ns - time_now;
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}
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