src/timer/dummy/SDL_systimer.c
author Sam Lantinga
Thu, 16 Feb 2006 10:11:48 +0000
changeset 1361 19418e4422cb
child 1402 d910939febfa
permissions -rw-r--r--
New configure-based build system. Still work in progress, but much improved
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2006 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Lesser General Public
     7     License as published by the Free Software Foundation; either
     8     version 2.1 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Lesser General Public License for more details.
    14 
    15     You should have received a copy of the GNU Lesser General Public
    16     License along with this library; if not, write to the Free Software
    17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 
    23 void SDL_StartTicks(void)
    24 {
    25 }
    26 
    27 Uint32 SDL_GetTicks (void)
    28 {
    29 	SDL_Unsupported();
    30 	return 0;
    31 }
    32 
    33 void SDL_Delay (Uint32 ms)
    34 {
    35 	SDL_Unsupported();
    36 }
    37 
    38 #include "SDL_thread.h"
    39 
    40 /* Data to handle a single periodic alarm */
    41 static int timer_alive = 0;
    42 static SDL_Thread *timer = NULL;
    43 
    44 static int RunTimer(void *unused)
    45 {
    46 	while ( timer_alive ) {
    47 		if ( SDL_timer_running ) {
    48 			SDL_ThreadedTimerCheck();
    49 		}
    50 		SDL_Delay(1);
    51 	}
    52 	return(0);
    53 }
    54 
    55 /* This is only called if the event thread is not running */
    56 int SDL_SYS_TimerInit(void)
    57 {
    58 	timer_alive = 1;
    59 	timer = SDL_CreateThread(RunTimer, NULL);
    60 	if ( timer == NULL )
    61 		return(-1);
    62 	return(SDL_SetTimerThreaded(1));
    63 }
    64 
    65 void SDL_SYS_TimerQuit(void)
    66 {
    67 	timer_alive = 0;
    68 	if ( timer ) {
    69 		SDL_WaitThread(timer, NULL);
    70 		timer = NULL;
    71 	}
    72 }
    73 
    74 int SDL_SYS_StartTimer(void)
    75 {
    76 	SDL_SetError("Internal logic error: threaded timer in use");
    77 	return(-1);
    78 }
    79 
    80 void SDL_SYS_StopTimer(void)
    81 {
    82 	return;
    83 }