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| #include "thread.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
/* this function is run by the second thread */
void *inc_x(void *x_void_ptr)
{
/* increment x to 100 */
int *x_ptr = (int *)x_void_ptr;
while(++(*x_ptr) < 100);
printf("x increment finished\n");
/* the function must return something - NULL will do */
return NULL;
}
int main()
{
int x = 0, y = 0;
/* show the initial values of x and y */
printf("x: %d, y: %d\n", x, y);
/* this variable is our reference to the second thread */
pthread_t inc_x_thread;
/* create a second thread which executes inc_x(&x) */
if(pthread_create(&inc_x_thread, NULL, inc_x, &x)) {
fprintf(stderr, "Error creating thread\n");
return 1;
}
/* increment y to 100 in the first thread */
while(++y < 100);
printf("y increment finished\n");
/* wait for the second thread to finish */
if(pthread_join(inc_x_thread, NULL)) {
fprintf(stderr, "Error joining thread\n");
return 2;
}
/* show the results - x is now 100 thanks to the second thread */
printf("x: %d, y: %d\n", x, y);
return 0;
} |
collect2.exe: erreur: ld a retourné 1 code d'état d'exécution - Eclispse
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