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/*
* Copyright (c) 2001-2003 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 1998-2001 University of Notre Dame.
* All rights reserved.
* Copyright (c) 1994-1998 The Ohio State University.
* All rights reserved.
*
* This file is part of the LAM/MPI software package. For license
* information, see the LICENSE file in the top level directory of the
* LAM/MPI source distribution.
*
* $HEADER$
*
* $Id: microsleep.c,v 6.9 2003/10/11 19:15:35 brbarret Exp $
*
* Function: - higher precision sleep (microseconds)
* - uses select() timeout value
* - does not restart if interrupted
*/
#include <lam_config.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#if defined(HAVE_SYS_SELECT_H) && HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#include <laminternal.h>
int
microsleep(unsigned int usec)
{
struct timeval timeout;
timeout.tv_sec = usec / 1000000;
timeout.tv_usec = usec % 1000000;
while ((select(0, (fd_set *) 0, (fd_set *) 0,
(fd_set *) 0, &timeout) < 0) && (errno == EINTR));
return(0);
}
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