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Full Discussion: Killing a Child Thread
Top Forums Programming Killing a Child Thread Post 302648987 by Brandon9000 on Wednesday 30th of May 2012 03:41:49 PM
Old 05-30-2012
I see. Thanks. I will.

One other thing, if I cancel a thread, I have to consider the possibility that there could be an unanticipated scenario in which the thread no longer exists at the instant when I cancel it, even if thought I was doing appropriate checking for existence. In a test I did, cancelling a non-existent thread caused a segfault which caused the parent to exit. I tried to trap signals to prevent the parent from abending using SIG_IGN, but it abended anyway. Do you know if such a thing is possible. I did work up a scheme which should prevent ever cancelling a non-existent thread, but I would feel more comfortable if that situation were covered.
 

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iv_thread(3)						    ivykis programmer's manual						      iv_thread(3)

NAME
iv_thread_create, iv_thread_set_debug_state - ivykis thread convenience functions SYNOPSIS
#include <iv_thread.h> int iv_thread_create(char *name, void (*start_routine)(void *), void *arg); void iv_thread_set_debug_state(int state); DESCRIPTION
iv_thread_create is a wrapper around pthread_create(3) which will maintain an ivykis main loop reference in the calling thread (which must be an ivykis(3) thread, i.e. have had iv_init(3) called in it) for as long as the created thread is alive. Maintaining a reference on the calling thread's ivykis event loop makes sure that the calling thread will not return from its ivykis main loop before the created thread exits, as that could cause cleanup still happening in the created thread to be interrupted when the calling thread subsequently calls exit(3). The created thread need not be an ivykis thread. Enabling debugging by calling iv_thread_set_debug with a nonzero argument will print a debug message to standard error whenever a thread is created via iv_thread_create, whenever a thread so created terminates normally by returning from its start_routine, self-terminates by calling pthread_exit(3), or is successfully canceled by pthread_cancel(3), and whenever destruction of such a thread is signaled back to the calling thread. For inter-thread signaling, iv_thread uses iv_event(3). SEE ALSO
ivykis(3), iv_event(3), exit(3), pthread_cancel(3), pthread_create(3), pthread_exit(3) ivykis 2010-09-13 iv_thread(3)
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