Mercurial > sdl-ios-xcode
view src/timer/nds/SDL_systimer.c @ 4441:e3033ab628a1
Fixed bug 978
Yann Leprince 2010-03-31 11:07:53 PDT
Please add a #serial line as below to sdl.m4 and increase the serial number
with each revision of this file. This allows using aclocal --install, thereby
enabling automatic updating of sdl.m4 in SDL-based packages that distribute it.
# serial 1
The complete documentation and rationale for #serial can be found in the
Automake documentation:
<http://www.gnu.org/software/automake/manual/html_node/Serials.html>.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Fri, 23 Apr 2010 02:19:34 -0700 |
parents | f7b03b6838cb |
children | 481dabb098ef |
line wrap: on
line source
/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2010 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" #ifdef SDL_TIMER_NDS #include <nds.h> #include <nds/timers.h> #include "SDL_timer.h" #include "../SDL_timer_c.h" #include "../SDL_systimer.h" /* Data to handle a single periodic alarm */ static int timer_alive = 0; static Uint32 timer_ticks; void SDL_StartTicks(void) { if (!timer_alive) { SDL_SYS_TimerInit(); SDL_SYS_StartTimer(); } timer_ticks = 0; } Uint32 SDL_GetTicks(void) { return timer_ticks; } void SDL_Delay(Uint32 ms) { Uint32 start = SDL_GetTicks(); while (timer_alive) { if ((SDL_GetTicks() - start) >= ms) break; } } static int RunTimer(void *unused) { while (timer_alive) { if (SDL_timer_running) { } SDL_Delay(1); } return (0); } void NDS_TimerInterrupt(void) { timer_ticks++; } /* This is only called if the event thread is not running */ int SDL_SYS_TimerInit(void) { timer_alive = 1; timer_ticks = 0; TIMER_CR(3) = TIMER_DIV_1024 | TIMER_IRQ_REQ; TIMER_DATA(3) = TIMER_FREQ_1024(1000); irqSet(IRQ_TIMER3, NDS_TimerInterrupt); irqEnable(IRQ_TIMER3); return 0; } void SDL_SYS_TimerQuit(void) { if (timer_alive) { TIMER_CR(3) = 0; } timer_alive = 0; irqDisable(IRQ_TIMER3); } int SDL_SYS_StartTimer(void) { TIMER_CR(3) |= TIMER_ENABLE; return 0; } void SDL_SYS_StopTimer(void) { TIMER_CR(3) &= ~TIMER_ENABLE; return; } #endif /* SDL_TIMER_NDS */ /* vi: set ts=4 sw=4 expandtab: */