+++ /dev/null
-/*
- Simple DirectMedia Layer
- Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
-
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the authors be held liable for any damages
- arising from the use of this software.
-
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute it
- freely, subject to the following restrictions:
-
- 1. The origin of this software must not be misrepresented; you must not
- claim that you wrote the original software. If you use this software
- in a product, an acknowledgment in the product documentation would be
- appreciated but is not required.
- 2. Altered source versions must be plainly marked as such, and must not be
- misrepresented as being the original software.
- 3. This notice may not be removed or altered from any source distribution.
-*/
-
-#ifndef SDL_timer_h_
-#define SDL_timer_h_
-
-/**
- * \file SDL_timer.h
- *
- * Header for the SDL time management routines.
- */
-
-#include "SDL_stdinc.h"
-#include "SDL_error.h"
-
-#include "begin_code.h"
-/* Set up for C function definitions, even when using C++ */
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * Get the number of milliseconds since SDL library initialization.
- *
- * This value wraps if the program runs for more than ~49 days.
- *
- * This function is not recommended as of SDL 2.0.18; use SDL_GetTicks64()
- * instead, where the value doesn't wrap every ~49 days. There are places in
- * SDL where we provide a 32-bit timestamp that can not change without
- * breaking binary compatibility, though, so this function isn't officially
- * deprecated.
- *
- * \returns an unsigned 32-bit value representing the number of milliseconds
- * since the SDL library initialized.
- *
- * \since This function is available since SDL 2.0.0.
- *
- * \sa SDL_TICKS_PASSED
- */
-extern DECLSPEC Uint32 SDLCALL SDL_GetTicks(void);
-
-/**
- * Get the number of milliseconds since SDL library initialization.
- *
- * Note that you should not use the SDL_TICKS_PASSED macro with values
- * returned by this function, as that macro does clever math to compensate for
- * the 32-bit overflow every ~49 days that SDL_GetTicks() suffers from. 64-bit
- * values from this function can be safely compared directly.
- *
- * For example, if you want to wait 100 ms, you could do this:
- *
- * ```c
- * const Uint64 timeout = SDL_GetTicks64() + 100;
- * while (SDL_GetTicks64() < timeout) {
- * // ... do work until timeout has elapsed
- * }
- * ```
- *
- * \returns an unsigned 64-bit value representing the number of milliseconds
- * since the SDL library initialized.
- *
- * \since This function is available since SDL 2.0.18.
- */
-extern DECLSPEC Uint64 SDLCALL SDL_GetTicks64(void);
-
-/**
- * Compare 32-bit SDL ticks values, and return true if `A` has passed `B`.
- *
- * This should be used with results from SDL_GetTicks(), as this macro
- * attempts to deal with the 32-bit counter wrapping back to zero every ~49
- * days, but should _not_ be used with SDL_GetTicks64(), which does not have
- * that problem.
- *
- * For example, with SDL_GetTicks(), if you want to wait 100 ms, you could
- * do this:
- *
- * ```c
- * const Uint32 timeout = SDL_GetTicks() + 100;
- * while (!SDL_TICKS_PASSED(SDL_GetTicks(), timeout)) {
- * // ... do work until timeout has elapsed
- * }
- * ```
- *
- * Note that this does not handle tick differences greater
- * than 2^31 so take care when using the above kind of code
- * with large timeout delays (tens of days).
- */
-#define SDL_TICKS_PASSED(A, B) ((Sint32)((B) - (A)) <= 0)
-
-/**
- * Get the current value of the high resolution counter.
- *
- * This function is typically used for profiling.
- *
- * The counter values are only meaningful relative to each other. Differences
- * between values can be converted to times by using
- * SDL_GetPerformanceFrequency().
- *
- * \returns the current counter value.
- *
- * \since This function is available since SDL 2.0.0.
- *
- * \sa SDL_GetPerformanceFrequency
- */
-extern DECLSPEC Uint64 SDLCALL SDL_GetPerformanceCounter(void);
-
-/**
- * Get the count per second of the high resolution counter.
- *
- * \returns a platform-specific count per second.
- *
- * \since This function is available since SDL 2.0.0.
- *
- * \sa SDL_GetPerformanceCounter
- */
-extern DECLSPEC Uint64 SDLCALL SDL_GetPerformanceFrequency(void);
-
-/**
- * Wait a specified number of milliseconds before returning.
- *
- * This function waits a specified number of milliseconds before returning. It
- * waits at least the specified time, but possibly longer due to OS
- * scheduling.
- *
- * \param ms the number of milliseconds to delay
- *
- * \since This function is available since SDL 2.0.0.
- */
-extern DECLSPEC void SDLCALL SDL_Delay(Uint32 ms);
-
-/**
- * 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.
- */
-typedef Uint32 (SDLCALL * SDL_TimerCallback) (Uint32 interval, void *param);
-
-/**
- * Definition of the timer ID type.
- */
-typedef int SDL_TimerID;
-
-/**
- * Call a callback function at a future time.
- *
- * If you use this function, you must pass `SDL_INIT_TIMER` to SDL_Init().
- *
- * The callback function is passed the current timer interval and the user
- * supplied parameter from the SDL_AddTimer() call and should return the next
- * timer interval. If the value returned from the callback is 0, the timer is
- * canceled.
- *
- * The callback is run on a separate thread.
- *
- * Timers take into account the amount of time it took to execute the
- * callback. For example, if the callback took 250 ms to execute and returned
- * 1000 (ms), the timer would only wait another 750 ms before its next
- * iteration.
- *
- * Timing may be inexact due to OS scheduling. Be sure to note the current
- * time with SDL_GetTicks() or SDL_GetPerformanceCounter() in case your
- * callback needs to adjust for variances.
- *
- * \param interval the timer delay, in milliseconds, passed to `callback`
- * \param callback the SDL_TimerCallback function to call when the specified
- * `interval` elapses
- * \param param a pointer that is passed to `callback`
- * \returns a timer ID or 0 if an error occurs; call SDL_GetError() for more
- * information.
- *
- * \since This function is available since SDL 2.0.0.
- *
- * \sa SDL_RemoveTimer
- */
-extern DECLSPEC SDL_TimerID SDLCALL SDL_AddTimer(Uint32 interval,
- SDL_TimerCallback callback,
- void *param);
-
-/**
- * Remove a timer created with SDL_AddTimer().
- *
- * \param id the ID of the timer to remove
- * \returns SDL_TRUE if the timer is removed or SDL_FALSE if the timer wasn't
- * found.
- *
- * \since This function is available since SDL 2.0.0.
- *
- * \sa SDL_AddTimer
- */
-extern DECLSPEC SDL_bool SDLCALL SDL_RemoveTimer(SDL_TimerID id);
-
-
-/* Ends C function definitions when using C++ */
-#ifdef __cplusplus
-}
-#endif
-#include "close_code.h"
-
-#endif /* SDL_timer_h_ */
-
-/* vi: set ts=4 sw=4 expandtab: */
projects / xonotic / darkplaces.git / blobdiff