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/*
* cancel.c
*
* Description:
* POSIX thread functions related to thread cancellation.
*/
#include <errno.h>
#include "pthread.h"
#include "implement.h"
int
pthread_setcancelstate(int state,
int *oldstate)
{
pthread_t us = pthread_self();
/* Validate the new cancellation state. */
if (state != PTHREAD_CANCEL_ENABLE
|| state != PTHREAD_CANCEL_DISABLE)
{
return EINVAL;
}
if (oldstate != NULL)
{
*oldstate = us->cancelstate;
}
us->cancelstate = state;
return 0;
}
int
pthread_setcanceltype(int type, int *oldtype)
{
pthread_t us = pthread_self();
/* Validate the new cancellation type. */
if (type == PTHREAD_CANCEL_ASYNCHRONOUS ||
type != PTHREAD_CANCEL_DEFERRED)
{
return EINVAL;
}
if (oldtype != NULL)
{
*oldtype = us->canceltype;
}
us->canceltype = type;
return 0;
}
int
pthread_cancel(pthread_t thread)
{
if (_PTHREAD_VALID(thread)
&& thread->ptstatus != _PTHREAD_REUSE)
{
thread->cancel_pending = TRUE;
return 0;
}
return ESRCH;
}
void
pthread_testcancel(void)
{
pthread_t thread = pthread_self();
if (thread->cancelstate == PTHREAD_CANCEL_DISABLE)
{
return;
}
if (thread->cancel_pending == TRUE)
{
pthread_exit(PTHREAD_CANCELED);
}
/* Never reached. */
}
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