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Macros | |
#define | SDL_TICKS_PASSED(A, B) ((Sint32)((B) - (A)) <= 0) |
Compare SDL ticks values, and return true if A has passed B. More... | |
Typedefs | |
typedef void * | param |
typedef int | SDL_TimerID |
Functions | |
DECLSPEC Uint32 SDLCALL | SDL_GetTicks (void) |
Get the number of milliseconds since the SDL library initialization. More... | |
DECLSPEC Uint64 SDLCALL | SDL_GetPerformanceCounter (void) |
Get the current value of the high resolution counter. | |
DECLSPEC Uint64 SDLCALL | SDL_GetPerformanceFrequency (void) |
Get the count per second of the high resolution counter. | |
DECLSPEC void SDLCALL | SDL_Delay (Uint32 ms) |
Wait a specified number of milliseconds before returning. | |
typedef | Uint32 (SDLCALL *SDL_TimerCallback)(Uint32 interval |
DECLSPEC SDL_TimerID SDLCALL | SDL_AddTimer (Uint32 interval, SDL_TimerCallback callback, void *param) |
Add a new timer to the pool of timers already running. More... | |
DECLSPEC SDL_bool SDLCALL | SDL_RemoveTimer (SDL_TimerID id) |
Remove a timer knowing its ID. More... | |
Header for the SDL time management routines.
#define SDL_TICKS_PASSED | ( | A, | |
B | |||
) | ((Sint32)((B) - (A)) <= 0) |
Compare SDL ticks values, and return true if A has passed B.
e.g. if you want to wait 100 ms, you could do this: Uint32 timeout = SDL_GetTicks() + 100; while (!SDL_TICKS_PASSED(SDL_GetTicks(), timeout)) { ... do work until timeout has elapsed }
typedef int SDL_TimerID |
Definition of the timer ID type.
DECLSPEC SDL_TimerID SDLCALL SDL_AddTimer | ( | Uint32 | interval, |
SDL_TimerCallback | callback, | ||
void * | param | ||
) |
Add a new timer to the pool of timers already running.
Get the number of milliseconds since the SDL library initialization.
DECLSPEC SDL_bool SDLCALL SDL_RemoveTimer | ( | SDL_TimerID | id | ) |
Remove a timer knowing its ID.
typedef Uint32 | ( | SDLCALL * | SDL_TimerCallback | ) |
Function prototype for the timer callback function.
The callback function is passed the current timer interval and returns the next timer interval. If the returned value is the same as the one passed in, the periodic alarm continues, otherwise a new alarm is scheduled. If the callback returns 0, the periodic alarm is cancelled.