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/****************************************************************************
* *
* GNAT COMPILER COMPONENTS *
* *
* P T H R E A D *
* *
* C Implementation File *
* *
* Copyright (C) 2011-2014, Free Software Foundation, Inc. *
* *
* GNAT is free software; you can redistribute it and/or modify it under *
* terms of the GNU General Public License as published by the Free Soft- *
* ware Foundation; either version 3, or (at your option) any later ver- *
* sion. GNAT is distributed in the hope that it will be useful, but WITH- *
* OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
* or FITNESS FOR A PARTICULAR PURPOSE. *
* *
* As a special exception under Section 7 of GPL version 3, you are granted *
* additional permissions described in the GCC Runtime Library Exception, *
* version 3.1, as published by the Free Software Foundation. *
* *
* You should have received a copy of the GNU General Public License and *
* a copy of the GCC Runtime Library Exception along with this program; *
* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
* <http://www.gnu.org/licenses/>. *
* *
* GNAT was originally developed by the GNAT team at New York University. *
* Extensive contributions were provided by Ada Core Technologies Inc. *
* *
****************************************************************************/
/* This file provides utility functions to access the threads API */
#include "s-oscons.h"
/* If the clock we used for tasking (CLOCK_RT_Ada) is not the default
* CLOCK_REALTIME, we need to set cond var attributes accordingly.
*/
#if CLOCK_RT_Ada != CLOCK_REALTIME
# include <pthread.h>
# include <time.h>
int
__gnat_pthread_condattr_setup(pthread_condattr_t *attr) {
return pthread_condattr_setclock (attr, CLOCK_RT_Ada);
}
#else
int
__gnat_pthread_condattr_setup (void *attr) {
/* Dummy version for other platforms, which may or may not have pthread.h */
return 0;
}
#endif
#if defined (__APPLE__)
#include <mach/mach.h>
#include <mach/clock.h>
#endif
/* Return the clock ticks per nanosecond for Posix systems lacking the
Posix extension function clock_getres, or else 0 nsecs on error. */
int
__gnat_clock_get_res (void)
{
#if defined (__APPLE__)
clock_serv_t clock_port;
mach_msg_type_number_t count;
int nsecs;
int result;
count = 1;
result = host_get_clock_service
(mach_host_self (), SYSTEM_CLOCK, &clock_port);
if (result == KERN_SUCCESS)
result = clock_get_attributes (clock_port, CLOCK_GET_TIME_RES,
(clock_attr_t) &nsecs, &count);
if (result == KERN_SUCCESS)
return nsecs;
#endif
return 0;
}
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