Import SDL release-1.2.15

Change-Id: I505c4aea24325cad475f217db5589814b4c75dbf

1 files changed, 103 insertions, 0 deletions

diff --git a/distrib/sdl-1.2.15/test/testsem.c b/distrib/sdl-1.2.15/test/testsem.c
new file mode 100644
index 0000000..c906432
--- /dev/null
+++ b/distrib/sdl-1.2.15/test/testsem.c
@@ -0,0 +1,103 @@
+
+/* Simple test of the SDL semaphore code */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+
+#include "SDL.h"
+#include "SDL_thread.h"
+
+#define NUM_THREADS 10
+
+static SDL_sem *sem;
+int alive = 1;
+
+int SDLCALL ThreadFunc(void *data)
+{
+	int threadnum = (int)(uintptr_t)data;
+	while ( alive ) {
+		SDL_SemWait(sem);
+		fprintf(stderr, "Thread number %d has got the semaphore (value = %d)!\n", threadnum, SDL_SemValue(sem));
+		SDL_Delay(200);
+		SDL_SemPost(sem);
+		fprintf(stderr, "Thread number %d has released the semaphore (value = %d)!\n", threadnum, SDL_SemValue(sem));
+		SDL_Delay(1); /* For the scheduler */
+	}
+	printf("Thread number %d exiting.\n", threadnum);
+	return 0;
+}
+
+static void killed(int sig)
+{
+	alive = 0;
+}
+
+static void TestWaitTimeout(void)
+{
+	Uint32 start_ticks;
+	Uint32 end_ticks;
+	Uint32 duration;
+
+	sem = SDL_CreateSemaphore(0);
+	printf("Waiting 2 seconds on semaphore\n");
+
+	start_ticks = SDL_GetTicks();
+	SDL_SemWaitTimeout(sem, 2000);
+	end_ticks = SDL_GetTicks();
+
+	duration = end_ticks - start_ticks;
+	
+	/* Accept a little offset in the effective wait */
+	if (duration > 1900 && duration < 2050)
+		printf("Wait done.\n");
+	else
+		fprintf(stderr, "Wait took %d milliseconds\n", duration);
+}
+
+int main(int argc, char **argv)
+{
+	SDL_Thread *threads[NUM_THREADS];
+	uintptr_t i;
+	int init_sem;
+
+	if(argc < 2) {
+		fprintf(stderr,"Usage: %s init_value\n", argv[0]);
+		return(1);
+	}
+
+	/* Load the SDL library */
+	if ( SDL_Init(0) < 0 ) {
+		fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
+		return(1);
+	}
+	signal(SIGTERM, killed);
+	signal(SIGINT, killed);
+	
+	init_sem = atoi(argv[1]);
+	sem = SDL_CreateSemaphore(init_sem);
+	
+	printf("Running %d threads, semaphore value = %d\n", NUM_THREADS, init_sem);
+	/* Create all the threads */
+	for( i = 0; i < NUM_THREADS; ++i ) {
+		threads[i] = SDL_CreateThread(ThreadFunc, (void*)i);
+	}
+
+	/* Wait 10 seconds */
+	SDL_Delay(10 * 1000);
+
+	/* Wait for all threads to finish */
+	printf("Waiting for threads to finish\n");
+	alive = 0;
+	for( i = 0; i < NUM_THREADS; ++i ) {
+		SDL_WaitThread(threads[i], NULL);
+	}
+	printf("Finished waiting for threads\n");
+
+	SDL_DestroySemaphore(sem);
+
+	TestWaitTimeout();
+
+	SDL_Quit();
+	return(0);
+}