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comparison test/testsem.c @ 5108:d547877e355e

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Colin Leroy 2011-01-26 04:24:20 PST the pthread implementation of SDL_SemWaitTimeout() uses busy waiting, while pthread's sem_timedwait() does work. Attached are patches that make use of it
author Sam Lantinga <slouken@libsdl.org>
date Thu, 27 Jan 2011 00:34:12 -0800
parents c121d94672cb
children
comparison
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5106:5fe0330b0fd6 5108:d547877e355e
35 35
36 static void 36 static void
37 killed(int sig) 37 killed(int sig)
38 { 38 {
39 alive = 0; 39 alive = 0;
40 }
41
42 static void
43 TestWaitTimeout(void)
44 {
45 Uint32 start_ticks;
46 Uint32 end_ticks;
47 Uint32 duration;
48
49 sem = SDL_CreateSemaphore(0);
50 printf("Waiting 2 seconds on semaphore\n");
51
52 start_ticks = SDL_GetTicks();
53 SDL_SemWaitTimeout(sem, 2000);
54 end_ticks = SDL_GetTicks();
55
56 duration = end_ticks - start_ticks;
57
58 /* Accept a little offset in the effective wait */
59 if (duration > 1900 && duration < 2050)
60 printf("Wait done.\n");
61 else
62 fprintf(stderr, "Wait took %d milliseconds\n", duration);
40 } 63 }
41 64
42 int 65 int
43 main(int argc, char **argv) 66 main(int argc, char **argv)
44 { 67 {
79 SDL_WaitThread(threads[i], NULL); 102 SDL_WaitThread(threads[i], NULL);
80 } 103 }
81 printf("Finished waiting for threads\n"); 104 printf("Finished waiting for threads\n");
82 105
83 SDL_DestroySemaphore(sem); 106 SDL_DestroySemaphore(sem);
107
108 TestWaitTimeout();
109
84 SDL_Quit(); 110 SDL_Quit();
85 return (0); 111 return (0);
86 } 112 }