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add throttling from x48(ng)

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Gwenhael Le Moine 2023-10-03 14:45:57 +02:00
parent af509f1394
commit 9b953e44b6
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GPG key ID: FDFE3669426707A7
1 changed files with 30 additions and 8 deletions
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38
src/emulator.c
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@ -1,5 +1,8 @@
#include <SDL2/SDL.h>
#include <stdlib.h>
#include <sys/time.h>
#include <SDL2/SDL.h>
#include "types.h"
#include "cpu.h"
#include "bus.h"
@ -129,6 +132,25 @@ void emulator_exit( void )
bus_exit();
}
void throttle( bool is_needed )
{
if ( !is_needed )
return;
struct timeval tv;
struct timeval tv2;
struct timezone tz;
/* Throttling speed */
gettimeofday( &tv, &tz );
gettimeofday( &tv2, &tz );
while ( ( tv.tv_sec == tv2.tv_sec ) && ( ( tv.tv_usec - tv2.tv_usec ) < 2 ) )
gettimeofday( &tv, &tz );
tv2.tv_usec = tv.tv_usec;
tv2.tv_sec = tv.tv_sec;
}
bool emulator_run( void )
{
CycleEvent* cep;
@ -155,6 +177,8 @@ bool emulator_run( void )
if ( !cpu.shutdown ) {
execute_instruction();
throttle( true );
if ( emulator_state == EMULATOR_STEP ) {
emulator_set_state( EMULATOR_STOP );
}
@ -192,13 +216,11 @@ bool emulator_run( void )
}
}
//
// #ifdef true_TIMER2
// if (emulator_state != EMULATOR_STOP) {
// stop_timer_proc(timer2_update);
// }
// #endif
//
#ifdef true_TIMER2
if ( emulator_state != EMULATOR_STOP ) {
stop_timer_proc( timer2_update );
}
#endif
if ( first_run == true && emulator_state == EMULATOR_STOP ) {
#ifdef true_TIMER2