Subj : Re: copying problem or thread not starting??
To   : comp.programming.threads
From : kelly
Date : Tue Mar 29 2005 03:30 pm

I added pthread_join and it worked.

Thanks.

kelly wrote:
> Hi,
> The program below compiles and link ok using gcc. However it is not 
> giving me the result I want. My long string is not being copied to 
> result1 or result2. I even tried array to array copy and still cannot 
> get my string. Experts could you help me here.  Thx.
> 
> #include "stdio.h"
> #include "stdlib.h"
> #include "time.h"
> #include "string.h"
> 
> /// Multithread header
> #include "pthread.h"
> 
> static char this_is_the_source_string[49] = "This is a long string that 
> need to stay intact.";
> static char this_is_the_comparaison_string[49] = "This is a long string 
> that need to stay intact.";
> 
> static char result1[49];
> static char result2[49];
> 
> // First thread function
> void * ThreadFunc1(void *threadid)
> {
>     int c;
> 
>     char *a = this_is_the_source_string;
>     
>     printf("1 Start\n");
>     strcpy(result1, a);
>     printf("1 End\n");
> 
>     return 0;
> }
> 
> // Second thread function
> void * ThreadFunc2(void *threadid)
> {
> 
>     char *a = this_is_the_source_string;
> 
>     printf("2 Start\n");
>     strcpy(result2, a);
>     printf("2 End\n");
> 
>     return 0;
> }
> 
> int main()
> {
>     pthread_t threads;
>     int t;
>     int a=0;
>     int b=1;
> 
>     // First Tread information
>       long  dwThreadId1, dwThrdParam1 = 1;
>       int hThread1;
>       long exitCode1 = 9;
> 
>     // Second Tread information
>       long dwThreadId2, dwThrdParam2 = 1;
>       int hThread2;
>       long exitCode2 = 9;
> 
>     // Other
>       int resultB1, resultB2;
> 
>     printf("Start of the program\n");
> 
>     // Create the first thread
>     hThread1 = pthread_create(&threads, NULL, ThreadFunc1, (void*)&a);
>     if (hThread1){
>          printf("ERROR; first pthread_create() fail ID is %d\n", hThread1);
>          exit(99);
>       }
> 
> 
>     // Create the second thread
>     hThread2 = pthread_create(&threads, NULL, ThreadFunc2, (void*)&b);
>     if (hThread2){
>          printf("ERROR; second pthread_create() fail ID is %d\n", 
> hThread2);
>          exit(99);
>       }
> 
>     /*
>     hThread2 = CreateThread(
>         NULL,                        // default security attributes
>         0,                           // use default stack size
>         ThreadFunc2,                 // thread function
>         NULL,
>         0,                           // use default creation flags
>         &dwThreadId2);               // returns the thread identifier
>      if (hThread2 == NULL) // Make sure the thread is created
>      {
>        printf("CreateThread failed: 2\n" );
>        exit(2);
>      };*/
> 
>     /*
>     // Wait for first thread finish
>     while (exitCode1 == STILL_ACTIVE)
>     {
>         GetExitCodeThread(hThread1, &exitCode1);
>     }
> 
>     // Wait for second thread finish
>       while (exitCode2 == STILL_ACTIVE)
>     {
>         GetExitCodeThread(hThread2, &exitCode2);
>     }*/
> 
>     printf("End of the thread\n");
> 
>     printf("Result 1: %s\n", result1);
>     printf("Result 2: %s\n", result2);
> 
>     resultB1 = strcmp(result1, this_is_the_comparaison_string);
>     resultB2 = strcmp(result2, this_is_the_comparaison_string);
>     
>     if (resultB1 != 0)
>     {
>         printf("End of the program with fail\n");
>     
>         pthread_exit(NULL);
>         exit(3);
>     }
> 
>     else if (resultB2 != 0)
>     {
>         printf("End of the program with fail\n");
>     
>         pthread_exit(NULL);
>         exit(4);
>     }
> 
>     else
>     {
>         printf("End of the program with success\n");
> 
>         pthread_exit(NULL);   
>         exit(0);
>     }
> 
>     sleep(1);
> 
> };
>

.