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NAME="POSIX-THREAD-CANCELLATION">Thread Cancellation [POSIX Section 18]</H1
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>int pthread_cancel(pthread_t thread);
int pthread_setcancelstate(int state, int *oldstate);
int pthread_setcanceltype(int type, int *oldtype);
void pthread_testcancel(void);
void pthread_cleanup_push( void (*routine)(void *),
void *arg);
void pthread_cleanup_pop( int execute);</PRE
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>Asynchronous cancellation is only partially implemented. In
particular, cancellation may occur in unexpected places in some
functions. It is strongly recommended that only synchronous
cancellation be used. </P
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