e14743d1 |
1 | |
2 | /* Test the thread and mutex locking functions |
3 | Also exercises the system's signal/thread interaction |
4 | */ |
5 | |
6 | #include <signal.h> |
7 | #include <stdio.h> |
8 | |
9 | #include "SDL.h" |
10 | #include "SDL_mutex.h" |
11 | #include "SDL_thread.h" |
12 | |
13 | static SDL_mutex *mutex = NULL; |
14 | static Uint32 mainthread; |
15 | static SDL_Thread *threads[6]; |
16 | static volatile int doterminate = 0; |
17 | |
18 | /* |
19 | * SDL_Quit() shouldn't be used with atexit() directly because |
20 | * calling conventions may differ... |
21 | */ |
22 | static void SDL_Quit_Wrapper(void) |
23 | { |
24 | SDL_Quit(); |
25 | } |
26 | |
27 | void printid(void) |
28 | { |
29 | printf("Process %u: exiting\n", SDL_ThreadID()); |
30 | } |
31 | |
32 | void terminate(int sig) |
33 | { |
34 | signal(SIGINT, terminate); |
35 | doterminate = 1; |
36 | } |
37 | void closemutex(int sig) |
38 | { |
39 | Uint32 id = SDL_ThreadID(); |
40 | int i; |
41 | printf("Process %u: Cleaning up...\n", id == mainthread ? 0 : id); |
42 | for ( i=0; i<6; ++i ) |
43 | SDL_KillThread(threads[i]); |
44 | SDL_DestroyMutex(mutex); |
45 | exit(sig); |
46 | } |
47 | int SDLCALL Run(void *data) |
48 | { |
49 | if ( SDL_ThreadID() == mainthread ) |
50 | signal(SIGTERM, closemutex); |
51 | while ( 1 ) { |
52 | printf("Process %u ready to work\n", SDL_ThreadID()); |
53 | if ( SDL_mutexP(mutex) < 0 ) { |
54 | fprintf(stderr, "Couldn't lock mutex: %s", SDL_GetError()); |
55 | exit(1); |
56 | } |
57 | printf("Process %u, working!\n", SDL_ThreadID()); |
58 | SDL_Delay(1*1000); |
59 | printf("Process %u, done!\n", SDL_ThreadID()); |
60 | if ( SDL_mutexV(mutex) < 0 ) { |
61 | fprintf(stderr, "Couldn't unlock mutex: %s", SDL_GetError()); |
62 | exit(1); |
63 | } |
64 | /* If this sleep isn't done, then threads may starve */ |
65 | SDL_Delay(10); |
66 | if (SDL_ThreadID() == mainthread && doterminate) { |
67 | printf("Process %u: raising SIGTERM\n", SDL_ThreadID()); |
68 | raise(SIGTERM); |
69 | } |
70 | } |
71 | return(0); |
72 | } |
73 | |
74 | int main(int argc, char *argv[]) |
75 | { |
76 | int i; |
77 | int maxproc = 6; |
78 | |
79 | /* Load the SDL library */ |
80 | if ( SDL_Init(0) < 0 ) { |
81 | fprintf(stderr, "%s\n", SDL_GetError()); |
82 | exit(1); |
83 | } |
84 | atexit(SDL_Quit_Wrapper); |
85 | |
86 | if ( (mutex=SDL_CreateMutex()) == NULL ) { |
87 | fprintf(stderr, "Couldn't create mutex: %s\n", SDL_GetError()); |
88 | exit(1); |
89 | } |
90 | |
91 | mainthread = SDL_ThreadID(); |
92 | printf("Main thread: %u\n", mainthread); |
93 | atexit(printid); |
94 | for ( i=0; i<maxproc; ++i ) { |
95 | if ( (threads[i]=SDL_CreateThread(Run, NULL)) == NULL ) |
96 | fprintf(stderr, "Couldn't create thread!\n"); |
97 | } |
98 | signal(SIGINT, terminate); |
99 | Run(NULL); |
100 | |
101 | return(0); /* Never reached */ |
102 | } |