Learning C By Example by Agus Kurniawan

Author:Agus Kurniawan [Kurniawan, Agus]
Language: eng
Format: epub, pdf
Publisher: PE Press
Published: 2015-03-26T22:00:00+00:00

For illustration, we build app to create a thread and try to terminate it using pthread_cancel().

Create a file, called terminateother.c, and write this code.

#include <stdio.h> #include <pthread.h> #include <string.h> #include <errno.h> #include <unistd.h> void* perform(void *arg) { int n = 0; // I'm not ready to be canceled pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL); printf("processing from thread\r\n"); while(1) { printf("%d ",n); n++; pthread_testcancel(); if(n>5) { // I'm ready to be canceled pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL); } sleep(1); } printf("\r\n"); } int main(int argc, char* argv[]) { pthread_t thread; int ret, status; errno = 0; ret = pthread_create (&thread, NULL, perform, NULL); if (ret) { printf("\n pthread_create() failed with error [%s]\n",strerror(errno)); return -1; } sleep(10); errno = 0; status = pthread_cancel(thread); if (status) { printf("\n pthread_cancel() failed with error [%s]\n",strerror(errno)); return -1; } int c = getchar(); // hold app to exit return 0; }

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