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-/*
- * np_delay.c
- *
- * Description:
- * This translation unit implements non-portable thread functions.
- *
- * --------------------------------------------------------------------------
- *
- * Pthreads-win32 - POSIX Threads Library for Win32
- * Copyright(C) 1998 John E. Bossom
- * Copyright(C) 1999,2002 Pthreads-win32 contributors
- *
- * Contact Email: rpj@ise.canberra.edu.au
- *
- * The current list of contributors is contained
- * in the file CONTRIBUTORS included with the source
- * code distribution. The list can also be seen at the
- * following World Wide Web location:
- * http://sources.redhat.com/pthreads-win32/contributors.html
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library in the file COPYING.LIB;
- * if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- */
-
-#include "pthread.h"
-#include "implement.h"
-
-/*
- * pthread_delay_np
- *
- * DESCRIPTION
- *
- * This routine causes a thread to delay execution for a specific period of time.
- * This period ends at the current time plus the specified interval. The routine
- * will not return before the end of the period is reached, but may return an
- * arbitrary amount of time after the period has gone by. This can be due to
- * system load, thread priorities, and system timer granularity.
- *
- * Specifying an interval of zero (0) seconds and zero (0) nanoseconds is
- * allowed and can be used to force the thread to give up the processor or to
- * deliver a pending cancelation request.
- *
- * The timespec structure contains the following two fields:
- *
- * tv_sec is an integer number of seconds.
- * tv_nsec is an integer number of nanoseconds.
- *
- * Return Values
- *
- * If an error condition occurs, this routine returns an integer value indicating
- * the type of error. Possible return values are as follows:
- *
- * 0
- * Successful completion.
- * [EINVAL]
- * The value specified by interval is invalid.
- *
- * Example
- *
- * The following code segment would wait for 5 and 1/2 seconds
- *
- * struct timespec tsWait;
- * int intRC;
- *
- * tsWait.tv_sec = 5;
- * tsWait.tv_nsec = 500000000L;
- * intRC = pthread_delay_np(&tsWait);
- */
-int
-pthread_delay_np (struct timespec * interval)
-{
- DWORD wait_time;
- DWORD secs_in_millisecs;
- DWORD millisecs;
- DWORD status;
- pthread_t self;
-
- if (interval == NULL)
- {
- return EINVAL;
- }
-
- if (interval->tv_sec == 0L && interval->tv_nsec == 0L)
- {
- pthread_testcancel();
- Sleep(0);
- pthread_testcancel();
- return (0);
- }
-
- /* convert secs to millisecs */
- secs_in_millisecs = interval->tv_sec * 1000L;
-
- /* convert nanosecs to millisecs (rounding up) */
- millisecs = (interval->tv_nsec + 999999L) / 1000000L;
-
- if (0 > (wait_time = secs_in_millisecs + millisecs))
- {
- return EINVAL;
- }
-
- if (NULL == (self = pthread_self()))
- {
- return ENOMEM;
- }
-
- if (self->cancelState == PTHREAD_CANCEL_ENABLE)
- {
- /*
- * Async cancelation won't catch us until wait_time is up.
- * Deferred cancelation will cancel us immediately.
- */
- if (WAIT_OBJECT_0 ==
- (status = WaitForSingleObject(self->cancelEvent, wait_time)) )
- {
- /*
- * Canceling!
- */
- (void) pthread_mutex_lock(&self->cancelLock);
- if (self->state < PThreadStateCanceling)
- {
- self->state = PThreadStateCanceling;
- self->cancelState = PTHREAD_CANCEL_DISABLE;
- (void) pthread_mutex_unlock(&self->cancelLock);
-
- ptw32_throw(PTW32_EPS_CANCEL);
- }
-
- (void) pthread_mutex_unlock(&self->cancelLock);
- return ESRCH;
- }
- else if (status != WAIT_TIMEOUT)
- {
- return EINVAL;
- }
- }
- else
- {
- Sleep( wait_time );
- }
-
- return (0);
-}