Sets the calling thread's cancelability state.
Threads Library (libpthreads.a)
int pthread_setcancelstate (int state, int * oldstate);
int pthread_setcanceltype (int type, int *oldstype);
int pthread_testcancel (void);
The pthread_setcancelstate function atomically both sets the calling thread's cancelability state to the indicated state and returns the previous cancelability state at the location referenced by oldstate. Legal values for state are PTHREAD_CANCEL_ENABLE and PTHREAD_CANCEL_DISABLE.
The pthread_setcanceltype function atomically both sets the calling thread's cancelability type to the indicated type and returns the previous cancelability type at the location referenced by oldtype. Legal values for type are PTHREAD_CANCEL_DEFERRED and PTHREAD_CANCEL_ASYNCHRONOUS.
The cancelability state and type of any newly created threads, including the thread in which main was first invoked, are PTHREAD_CANCEL_ENABLE and PTHREAD_CANCEL_DEFERRED respectively.
The pthread_testcancel function creates a cancellation point in the calling thread. The pthread_testcancel function has no effect if cancelability is disabled.
|state||Specifies the new cancelability state to set. It must have one of the following values:|
|oldstate||Points to where the previous cancelability state value will be stored.|
If successful, the pthread_setcancelstate and pthread_setcanceltype functions return zero. Otherwise, an error number is returned to indicate the error.
The pthread_setcancelstate function will fail if:
|EINVAL||The specified state is not PTHREAD_CANCEL_ENABLE or PTHREAD_CANCEL_DISABLE.|
The pthread_setcanceltype function will fail if:
|EINVAL||The specified type is not PTHREAD_CANCEL_DEFERRED or PTHREAD_CANCEL_ASYNCHRONOUS.|
These functions will not return an error code of EINTR.
This subroutine is part of the Base Operating System (BOS) Runtime.
The pthread_cancel (pthread_cancel Subroutine) subroutine.
The pthread.h file.
Terminating Threads in AIX 5L Version 5.1 General Programming Concepts: Writing and Debugging Programs.
Threads Library Quick Reference in AIX 5L Version 5.1 General Programming Concepts: Writing and Debugging Programs.