1
2 /* $Id: fpm_clock.c,v 1.4 2008/09/18 23:19:59 anight Exp $ */
3 /* (c) 2007,2008 Andrei Nigmatulin */
4
5 #include "fpm_config.h"
6
7 #if defined(HAVE_CLOCK_GETTIME)
8 #include <time.h> /* for CLOCK_MONOTONIC */
9 #endif
10
11 #include "fpm_clock.h"
12 #include "zlog.h"
13
14
15 /* posix monotonic clock - preferred source of time */
16 #if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_MONOTONIC)
17
18 static int monotonic_works;
19
fpm_clock_init()20 int fpm_clock_init() /* {{{ */
21 {
22 struct timespec ts;
23
24 monotonic_works = 0;
25
26 if (0 == clock_gettime(CLOCK_MONOTONIC, &ts)) {
27 monotonic_works = 1;
28 }
29
30 return 0;
31 }
32 /* }}} */
33
fpm_clock_get(struct timeval * tv)34 int fpm_clock_get(struct timeval *tv) /* {{{ */
35 {
36 if (monotonic_works) {
37 struct timespec ts;
38
39 if (0 > clock_gettime(CLOCK_MONOTONIC, &ts)) {
40 zlog(ZLOG_SYSERROR, "clock_gettime() failed");
41 return -1;
42 }
43
44 tv->tv_sec = ts.tv_sec;
45 tv->tv_usec = ts.tv_nsec / 1000;
46 return 0;
47 }
48
49 return gettimeofday(tv, 0);
50 }
51 /* }}} */
52
53 /* macosx clock */
54 #elif defined(HAVE_CLOCK_GET_TIME)
55
56 #include <mach/mach.h>
57 #include <mach/clock.h>
58 #include <mach/mach_error.h>
59
60 static clock_serv_t mach_clock;
61
62 /* this code borrowed from here: http://lists.apple.com/archives/Darwin-development/2002/Mar/msg00746.html */
63 /* mach_clock also should be re-initialized in child process after fork */
fpm_clock_init()64 int fpm_clock_init() /* {{{ */
65 {
66 kern_return_t ret;
67 mach_timespec_t aTime;
68
69 ret = host_get_clock_service(mach_host_self(), REALTIME_CLOCK, &mach_clock);
70
71 if (ret != KERN_SUCCESS) {
72 zlog(ZLOG_ERROR, "host_get_clock_service() failed: %s", mach_error_string(ret));
73 return -1;
74 }
75
76 /* test if it works */
77 ret = clock_get_time(mach_clock, &aTime);
78
79 if (ret != KERN_SUCCESS) {
80 zlog(ZLOG_ERROR, "clock_get_time() failed: %s", mach_error_string(ret));
81 return -1;
82 }
83
84 return 0;
85 }
86 /* }}} */
87
fpm_clock_get(struct timeval * tv)88 int fpm_clock_get(struct timeval *tv) /* {{{ */
89 {
90 kern_return_t ret;
91 mach_timespec_t aTime;
92
93 ret = clock_get_time(mach_clock, &aTime);
94
95 if (ret != KERN_SUCCESS) {
96 zlog(ZLOG_ERROR, "clock_get_time() failed: %s", mach_error_string(ret));
97 return -1;
98 }
99
100 tv->tv_sec = aTime.tv_sec;
101 tv->tv_usec = aTime.tv_nsec / 1000;
102
103 return 0;
104 }
105 /* }}} */
106
107 #else /* no clock */
108
fpm_clock_init()109 int fpm_clock_init() /* {{{ */
110 {
111 return 0;
112 }
113 /* }}} */
114
fpm_clock_get(struct timeval * tv)115 int fpm_clock_get(struct timeval *tv) /* {{{ */
116 {
117 return gettimeofday(tv, 0);
118 }
119 /* }}} */
120
121 #endif
122
