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-rw-r--r--distrib/sdl-1.2.15/src/thread/riscos/SDL_syscond.c160
1 files changed, 160 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/thread/riscos/SDL_syscond.c b/distrib/sdl-1.2.15/src/thread/riscos/SDL_syscond.c
new file mode 100644
index 0000000..ee55666
--- /dev/null
+++ b/distrib/sdl-1.2.15/src/thread/riscos/SDL_syscond.c
@@ -0,0 +1,160 @@
+/*
+ SDL - Simple DirectMedia Layer
+ Copyright (C) 1997-2012 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"
+
+/* RISC OS implementations uses pthreads based on linux code */
+
+#if SDL_THREADS_DISABLED
+#include "../generic/SDL_syscond.c"
+#else
+#include <sys/time.h>
+#include <unistd.h>
+#include <pthread.h>
+
+#include "SDL_thread.h"
+#include "SDL_sysmutex_c.h"
+
+struct SDL_cond
+{
+ pthread_cond_t cond;
+};
+
+/* Create a condition variable */
+SDL_cond * SDL_CreateCond(void)
+{
+ SDL_cond *cond;
+
+ cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
+ if ( cond ) {
+ if ( pthread_cond_init(&cond->cond, NULL) < 0 ) {
+ SDL_SetError("pthread_cond_init() failed");
+ SDL_free(cond);
+ cond = NULL;
+ }
+ }
+ return(cond);
+}
+
+/* Destroy a condition variable */
+void SDL_DestroyCond(SDL_cond *cond)
+{
+ if ( cond ) {
+ pthread_cond_destroy(&cond->cond);
+ SDL_free(cond);
+ }
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int SDL_CondSignal(SDL_cond *cond)
+{
+ int retval;
+
+ if ( ! cond ) {
+ SDL_SetError("Passed a NULL condition variable");
+ return -1;
+ }
+
+ retval = 0;
+ if ( pthread_cond_signal(&cond->cond) != 0 ) {
+ SDL_SetError("pthread_cond_signal() failed");
+ retval = -1;
+ }
+ return retval;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int SDL_CondBroadcast(SDL_cond *cond)
+{
+ int retval;
+
+ if ( ! cond ) {
+ SDL_SetError("Passed a NULL condition variable");
+ return -1;
+ }
+
+ retval = 0;
+ if ( pthread_cond_broadcast(&cond->cond) != 0 ) {
+ SDL_SetError("pthread_cond_broadcast() failed");
+ retval = -1;
+ }
+ return retval;
+}
+
+int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
+{
+ int retval;
+ struct timeval delta;
+ struct timespec abstime;
+
+ if ( ! cond ) {
+ SDL_SetError("Passed a NULL condition variable");
+ return -1;
+ }
+
+ gettimeofday(&delta, NULL);
+
+ abstime.tv_sec = delta.tv_sec + (ms/1000);
+ abstime.tv_nsec = (delta.tv_usec + (ms%1000) * 1000) * 1000;
+ if ( abstime.tv_nsec > 1000000000 ) {
+ abstime.tv_sec += 1;
+ abstime.tv_nsec -= 1000000000;
+ }
+
+ tryagain:
+ retval = pthread_cond_timedwait(&cond->cond, &mutex->id, &abstime);
+ switch (retval) {
+ case EINTR:
+ goto tryagain;
+ break;
+ case ETIMEDOUT:
+ retval = SDL_MUTEX_TIMEDOUT;
+ break;
+ case 0:
+ break;
+ default:
+ SDL_SetError("pthread_cond_timedwait() failed");
+ retval = -1;
+ break;
+ }
+ return retval;
+}
+
+/* Wait on the condition variable, unlocking the provided mutex.
+ The mutex must be locked before entering this function!
+ */
+int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
+{
+ int retval;
+
+ if ( ! cond ) {
+ SDL_SetError("Passed a NULL condition variable");
+ return -1;
+ }
+
+ retval = 0;
+ if ( pthread_cond_wait(&cond->cond, &mutex->id) != 0 ) {
+ SDL_SetError("pthread_cond_wait() failed");
+ retval = -1;
+ }
+ return retval;
+}
+#endif