89 lines
3.5 KiB
C
89 lines
3.5 KiB
C
/****************************************************************************
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* *
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* GNAT COMPILER COMPONENTS *
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* *
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* P T H R E A D *
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* *
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* C Implementation File *
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* *
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* Copyright (C) 2011-2020, Free Software Foundation, Inc. *
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* *
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* GNAT is free software; you can redistribute it and/or modify it under *
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* terms of the GNU General Public License as published by the Free Soft- *
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* ware Foundation; either version 3, or (at your option) any later ver- *
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* sion. GNAT is distributed in the hope that it will be useful, but WITH- *
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* OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
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* or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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* As a special exception under Section 7 of GPL version 3, you are granted *
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* additional permissions described in the GCC Runtime Library Exception, *
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* version 3.1, as published by the Free Software Foundation. *
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* *
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* You should have received a copy of the GNU General Public License and *
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* a copy of the GCC Runtime Library Exception along with this program; *
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* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
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* <http://www.gnu.org/licenses/>. *
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* *
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* GNAT was originally developed by the GNAT team at New York University. *
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* Extensive contributions were provided by Ada Core Technologies Inc. *
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* *
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****************************************************************************/
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/* This file provides utility functions to access the threads API */
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#include "s-oscons.h"
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/* If the clock we used for tasking (CLOCK_RT_Ada) is not the default
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* CLOCK_REALTIME, we need to set cond var attributes accordingly.
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*/
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#if CLOCK_RT_Ada != CLOCK_REALTIME
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# include <pthread.h>
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# include <time.h>
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int
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__gnat_pthread_condattr_setup(pthread_condattr_t *attr) {
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return pthread_condattr_setclock (attr, CLOCK_RT_Ada);
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}
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#else
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int
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__gnat_pthread_condattr_setup (void *attr) {
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/* Dummy version for other platforms, which may or may not have pthread.h */
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return 0;
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}
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#endif
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#if defined (__APPLE__)
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#include <mach/mach.h>
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#include <mach/clock.h>
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#endif
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/* Return the clock ticks per nanosecond for Posix systems lacking the
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Posix extension function clock_getres, or else 0 nsecs on error. */
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int
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__gnat_clock_get_res (void)
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{
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#if defined (__APPLE__)
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clock_serv_t clock_port;
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mach_msg_type_number_t count;
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int nsecs;
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int result;
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count = 1;
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result = host_get_clock_service
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(mach_host_self (), SYSTEM_CLOCK, &clock_port);
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if (result == KERN_SUCCESS)
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result = clock_get_attributes (clock_port, CLOCK_GET_TIME_RES,
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(clock_attr_t) &nsecs, &count);
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if (result == KERN_SUCCESS)
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return nsecs;
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#endif
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return 0;
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}
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