Hi Darwin Devloper, I am doing some assignments related to thread in user space.After doing lots of R & D, I came to know that "pthread_cancel()" is not working properly.The same program is working fine on Linux. Program is as follows... #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <pthread.h> #define SUCCESS 0 #define TRUE 1 // Thread function declaration void * run(void *); // Program to check for pthread cancel int main(int argc,char * argv[]) { pthread_t thread; int retval; // Create thread which will fall in infinite loop retval = pthread_create(&thread,NULL,run,NULL); if ( retval != SUCCESS ) { perror("Thread Creation Failed...\n"); exit(EXIT_FAILURE); } sleep(3); // Cancel Thread fprintf(stdout,"Canceling thread...\n"); retval = pthread_cancel(thread); if ( retval != SUCCESS ) { perror("Thread Caneclation Failed...\n"); exit(EXIT_FAILURE); } // Wait for Thread to join fprintf(stdout,"Waiting for Thread to Finish...\n"); retval = pthread_join(thread,NULL); if ( retval != SUCCESS ) { perror("Thread Joining Failed...\n"); exit(EXIT_FAILURE); } exit(EXIT_SUCCESS); } // Thread function void * run(void * arg) { int retval; // Set thread cancel state retval = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE,NULL); if ( retval != SUCCESS ) { perror("Thread pthread_setcancelstate Failed...\n"); exit(EXIT_FAILURE); } // Set thread cancel type retval = pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED,NULL); if ( retval != SUCCESS ) { perror("Thread pthread_setcanceltype failed..."); exit(EXIT_FAILURE); } // Infinite loop fprintf(stdout,"Thread Function is running...\n"); while ( TRUE ) { sleep(1); } } Regards Girish V. Dudhe (S P Software,Pune,India) __________________________________ Do you Yahoo!? Find out what made the Top Yahoo! Searches of 2003 http://search.yahoo.com/top2003 _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.