05-29-2012
Read cancellation point and then you will know if you can use pthread_cancel.
Threads The read system call is one of a lot of cancellation points.
BTW - threads are very different from a child process.
You can also invoke pthread_kill but other threads and the main thread can be affected unless threads all have enabled per-thread signal handling.
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LEARN ABOUT OSX
pthread_cancel
PTHREAD_CANCEL(3) BSD Library Functions Manual PTHREAD_CANCEL(3)
NAME
pthread_cancel -- cancel execution of a thread
SYNOPSIS
#include <pthread.h>
int
pthread_cancel(pthread_t thread);
DESCRIPTION
The pthread_cancel() function requests that thread be canceled. The target thread's cancelability state and type determines when the cancel-
lation takes effect. When the cancellation is acted on, the cancellation cleanup handlers for thread are called. When the last cancellation
cleanup handler returns, the thread-specific data destructor functions will be called for thread. When the last destructor function returns,
thread will be terminated.
The cancellation processing in the target thread runs asynchronously with respect to the calling thread returning from pthread_cancel().
A status of PTHREAD_CANCELED is made available to any threads joining with the target. The symbolic constant PTHREAD_CANCELED expands to a
constant expression of type (void *), whose value matches no pointer to an object in memory nor the value NULL.
RETURN VALUES
If successful, the pthread_cancel() functions will return zero. Otherwise an error number will be returned to indicate the error.
ERRORS
pthread_cancel() will fail if:
[ESRCH] No thread could be found corresponding to that specified by the given thread ID.
SEE ALSO
pthread_cleanup_pop(3), pthread_cleanup_push(3), pthread_exit(3), pthread_join(3), pthread_setcancelstate(3), pthread_setcanceltype(3),
pthread_testcancel(3)
STANDARDS
pthread_cancel() conforms to ISO/IEC 9945-1:1996 (``POSIX.1'').
AUTHORS
This man page was written by David Leonard <d@openbsd.org> for the OpenBSD implementation of pthread_cancel().
BSD
January 17, 1999 BSD