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timer.cpp
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timer.cpp
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#include "r-tech1/system/timer.h"
#include "r-tech1/init.h"
#ifdef USE_ALLEGRO5
#include <allegro5/allegro.h>
using std::vector;
namespace System{
struct TimerInfo{
TimerInfo(void (*x)(), ALLEGRO_TIMER * y):
tick(x), timer(y){}
void (*tick)();
ALLEGRO_TIMER * timer;
};
static void * do_timer(void * info){
TimerInfo * timerInfo = (TimerInfo*) info;
ALLEGRO_EVENT_SOURCE * source = al_get_timer_event_source(timerInfo->timer);
ALLEGRO_EVENT_QUEUE * queue = al_create_event_queue();
al_register_event_source(queue, source);
while (run_timer_guard.get()){
ALLEGRO_EVENT event;
/* Wait a maximum of 50ms in case we need to restart the timers */
if (al_wait_for_event_timed(queue, &event, 0.05)){
timerInfo->tick();
}
}
al_destroy_event_queue(queue);
al_destroy_timer(timerInfo->timer);
delete timerInfo;
return NULL;
}
static Util::Thread::Id start_timer(void (*func)(), int frequency){
ALLEGRO_TIMER * timer = al_create_timer(ALLEGRO_BPS_TO_SECS(frequency));
if (timer == NULL){
Global::debug(0) << "Could not create timer" << std::endl;
}
al_start_timer(timer);
TimerInfo * info = new TimerInfo(func, timer);
Util::Thread::Id thread;
Util::Thread::createThread(&thread, NULL, (Util::Thread::ThreadFunction) do_timer, (void*) info);
return thread;
}
static void inc_speed_counter(){
/* probably put input polling here, InputManager::poll(). no, don't do that.
* polling is done in the standardLoop now.
*/
Global::speed_counter4 += 1;
}
/* if you need to count seconds for some reason.. */
static void inc_second_counter() {
Global::second_counter += 1;
}
void startTimers(){
run_timer_guard.set(true);
running_timers.push_back(start_timer(inc_speed_counter, Global::TICS_PER_SECOND));
running_timers.push_back(start_timer(inc_second_counter, 1));
}
}
#endif

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