Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/libgnarl/thread.c @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | |
children | 84e7813d76e9 |
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68:561a7518be6b | 111:04ced10e8804 |
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1 /**************************************************************************** | |
2 * * | |
3 * GNAT COMPILER COMPONENTS * | |
4 * * | |
5 * P T H R E A D * | |
6 * * | |
7 * C Implementation File * | |
8 * * | |
9 * Copyright (C) 2011-2017, Free Software Foundation, Inc. * | |
10 * * | |
11 * GNAT is free software; you can redistribute it and/or modify it under * | |
12 * terms of the GNU General Public License as published by the Free Soft- * | |
13 * ware Foundation; either version 3, or (at your option) any later ver- * | |
14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- * | |
15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * | |
16 * or FITNESS FOR A PARTICULAR PURPOSE. * | |
17 * * | |
18 * As a special exception under Section 7 of GPL version 3, you are granted * | |
19 * additional permissions described in the GCC Runtime Library Exception, * | |
20 * version 3.1, as published by the Free Software Foundation. * | |
21 * * | |
22 * You should have received a copy of the GNU General Public License and * | |
23 * a copy of the GCC Runtime Library Exception along with this program; * | |
24 * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see * | |
25 * <http://www.gnu.org/licenses/>. * | |
26 * * | |
27 * GNAT was originally developed by the GNAT team at New York University. * | |
28 * Extensive contributions were provided by Ada Core Technologies Inc. * | |
29 * * | |
30 ****************************************************************************/ | |
31 | |
32 /* This file provides utility functions to access the threads API */ | |
33 | |
34 #include "s-oscons.h" | |
35 | |
36 /* If the clock we used for tasking (CLOCK_RT_Ada) is not the default | |
37 * CLOCK_REALTIME, we need to set cond var attributes accordingly. | |
38 */ | |
39 #if CLOCK_RT_Ada != CLOCK_REALTIME | |
40 # include <pthread.h> | |
41 # include <time.h> | |
42 | |
43 int | |
44 __gnat_pthread_condattr_setup(pthread_condattr_t *attr) { | |
45 return pthread_condattr_setclock (attr, CLOCK_RT_Ada); | |
46 } | |
47 | |
48 #else | |
49 | |
50 int | |
51 __gnat_pthread_condattr_setup (void *attr) { | |
52 /* Dummy version for other platforms, which may or may not have pthread.h */ | |
53 return 0; | |
54 } | |
55 | |
56 #endif | |
57 | |
58 #if defined (__APPLE__) | |
59 #include <mach/mach.h> | |
60 #include <mach/clock.h> | |
61 #endif | |
62 | |
63 /* Return the clock ticks per nanosecond for Posix systems lacking the | |
64 Posix extension function clock_getres, or else 0 nsecs on error. */ | |
65 | |
66 int | |
67 __gnat_clock_get_res (void) | |
68 { | |
69 #if defined (__APPLE__) | |
70 clock_serv_t clock_port; | |
71 mach_msg_type_number_t count; | |
72 int nsecs; | |
73 int result; | |
74 | |
75 count = 1; | |
76 result = host_get_clock_service | |
77 (mach_host_self (), SYSTEM_CLOCK, &clock_port); | |
78 | |
79 if (result == KERN_SUCCESS) | |
80 result = clock_get_attributes (clock_port, CLOCK_GET_TIME_RES, | |
81 (clock_attr_t) &nsecs, &count); | |
82 | |
83 if (result == KERN_SUCCESS) | |
84 return nsecs; | |
85 #endif | |
86 | |
87 return 0; | |
88 } |