#include <pthread.h> int
pthread_cancel (pthread_t thread);
DESCRIPTION
The
pthread_cancel ();
function requests that
Fa thread
be canceled.
The target thread's cancelability state and type determines
when the cancellation takes effect.
When the cancellation is acted on,
the cancellation cleanup handlers for
Fa thread
are called.
When the last cancellation cleanup handler returns,
the thread-specific data destructor functions will be called for
Fa thread .
When the last destructor function returns,
Fa 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
The
pthread_cancel ();
function will fail if:
Bq Er ESRCH
No thread could be found corresponding to that specified by the given
thread ID.
