src/timer/dummy/SDL_systimer.c
author Edward Rudd
Sat, 17 Aug 2013 18:07:29 -0400
changeset 7649 4f801cd08f3f
parent 6885 700f1b25f77f
child 8093 b43765095a6f
permissions -rw-r--r--
auto init the ticks if the GetTicks and the like methods are called before SDL_Init().. This prevents annoying game bugs such as caching SDL_GetPerformanceFrequency in a static initializer
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 #include "SDL_config.h"
    22 
    23 #if defined(SDL_TIMER_DUMMY) || defined(SDL_TIMERS_DISABLED)
    24 
    25 #include "SDL_timer.h"
    26 
    27 static SDL_bool ticks_started = SDL_FALSE;
    28 
    29 void
    30 SDL_InitTicks(void)
    31 {
    32     if (ticks_started) {
    33         return;
    34     }
    35     ticks_started = SDL_TRUE;
    36 }
    37 
    38 Uint32
    39 SDL_GetTicks(void)
    40 {
    41     if (!ticks_started) {
    42         SDL_InitTicks();
    43     }
    44 
    45     SDL_Unsupported();
    46     return 0;
    47 }
    48 
    49 Uint64
    50 SDL_GetPerformanceCounter(void)
    51 {
    52     return SDL_GetTicks();
    53 }
    54 
    55 Uint64
    56 SDL_GetPerformanceFrequency(void)
    57 {
    58     return 1000;
    59 }
    60 
    61 void
    62 SDL_Delay(Uint32 ms)
    63 {
    64     SDL_Unsupported();
    65 }
    66 
    67 #endif /* SDL_TIMER_DUMMY || SDL_TIMERS_DISABLED */
    68 
    69 /* vi: set ts=4 sw=4 expandtab: */