annotate test/testhread.c @ 1023:e719ee25439d

Fix potential use of freed memory in the threaded timer system
author Sam Lantinga <slouken@libsdl.org>
date Tue, 04 Jan 2005 19:05:32 +0000
parents 74212992fb08
children be9c9c8f6d53
rev   line source
0
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1
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2 /* Simple test of the SDL threading code */
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3
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4 #include <stdio.h>
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5 #include <stdlib.h>
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6 #include <signal.h>
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7
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8 #include "SDL.h"
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9 #include "SDL_thread.h"
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10
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11 static int alive = 0;
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12
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13 int ThreadFunc(void *data)
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14 {
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15 printf("Started thread %s: My thread id is %u\n",
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16 (char *)data, SDL_ThreadID());
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17 while ( alive ) {
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18 printf("Thread '%s' is alive!\n", (char *)data);
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19 SDL_Delay(1*1000);
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20 }
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21 printf("Thread '%s' exiting!\n", (char *)data);
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22 return(0);
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23 }
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24
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25 static void killed(int sig)
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26 {
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27 printf("Killed with SIGTERM, waiting 5 seconds to exit\n");
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28 SDL_Delay(5*1000);
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29 alive = 0;
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30 exit(0);
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31 }
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32
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33 int main(int argc, char *argv[])
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34 {
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35 SDL_Thread *thread;
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36
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37 /* Load the SDL library */
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38 if ( SDL_Init(0) < 0 ) {
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39 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
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40 exit(1);
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41 }
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42 atexit(SDL_Quit);
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43
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44 alive = 1;
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45 thread = SDL_CreateThread(ThreadFunc, "#1");
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46 if ( thread == NULL ) {
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47 fprintf(stderr, "Couldn't create thread: %s\n", SDL_GetError());
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48 exit(1);
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49 }
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50 SDL_Delay(5*1000);
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51 printf("Waiting for thread #1\n");
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52 alive = 0;
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53 SDL_WaitThread(thread, NULL);
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54
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55 alive = 1;
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56 thread = SDL_CreateThread(ThreadFunc, "#2");
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57 if ( thread == NULL ) {
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58 fprintf(stderr, "Couldn't create thread: %s\n", SDL_GetError());
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59 exit(1);
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60 }
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61 SDL_Delay(5*1000);
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62 printf("Killing thread #2\n");
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63 SDL_KillThread(thread);
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64
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65 alive = 1;
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66 signal(SIGTERM, killed);
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67 thread = SDL_CreateThread(ThreadFunc, "#3");
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68 if ( thread == NULL ) {
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69 fprintf(stderr, "Couldn't create thread: %s\n", SDL_GetError());
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70 exit(1);
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71 }
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72 raise(SIGTERM);
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73
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74 return(0); /* Never reached */
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75 }