Hamlib/lib/usleep.c

/* Copyright (C) 1992 Free Software Foundation, Inc.
This file is part of the GNU C Library.

    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 2.1 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; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <hamlib/config.h>

#ifndef HAVE_USLEEP

#include <sys/types.h>
#include <sys/time.h>

#ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif

#ifdef HAVE_WINDOWS_H
#include <windows.h>
#endif
#ifdef HAVE_WINBASE_H
# include <winbase.h>
#endif

#ifdef apollo
# include <apollo/base.h>
# include <apollo/time.h>
static time_$clock_t DomainTime100mS =
{
    0, 100000 / 4
};
static status_$t DomainStatus;
#endif

/* Sleep USECONDS microseconds, or until a previously set timer goes off.  */
int
usleep(unsigned long useconds)
{
#ifdef apollo
    /* The usleep function does not work under the SYS5.3 environment.
       Use the Domain/OS time_$wait call instead. */
    time_$wait(time_$relative, DomainTime100mS, &DomainStatus);
#elif defined(HAVE_SSLEEP)  /* Win32 */
    Sleep(useconds / 1000);
#else
    struct timeval delay;

    delay.tv_sec = 0;
    delay.tv_usec = useconds;
    select(0, 0, 0, 0, &delay);
#endif
    return 0;
}

#endif /* !HAVE_USLEEP */