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Fix potential use of freed memory in the threaded timer system

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This commit is contained in:
Sam Lantinga 2005-01-04 19:05:32 +00:00
parent 0c5e110baf
commit 7e956b2b3d
1 changed files with 8 additions and 2 deletions
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10
src/timer/SDL_timer.c
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@ -45,7 +45,7 @@ int SDL_timer_running = 0;
Uint32 SDL_alarm_interval = 0;
SDL_TimerCallback SDL_alarm_callback;
static SDL_bool list_changed = SDL_FALSE;
static volatile SDL_bool list_changed = SDL_FALSE;
/* Data used for a thread-based timer */
static int SDL_timer_threaded = 0;
@ -114,6 +114,9 @@ void SDL_ThreadedTimerCheck(void)
Uint32 now, ms;
SDL_TimerID t, prev, next;
int removed;
SDL_NewTimerCallback callback;
Uint32 interval;
void *param;
now = SDL_GetTicks();
@ -133,8 +136,11 @@ void SDL_ThreadedTimerCheck(void)
printf("Executing timer %p (thread = %d)\n",
t, SDL_ThreadID());
#endif
callback = t->cb;
interval = t->interval;
param = t->param;
SDL_mutexV(SDL_timer_mutex);
ms = t->cb(t->interval, t->param);
ms = callback(interval, param);
SDL_mutexP(SDL_timer_mutex);
if ( list_changed ) {
/* Abort, list of timers has been modified */