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annotate src/os/unix/ngx_time.c @ 178:a8ff48d26cca

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nginx-0.0.1-2003-11-11-00:09:22 import
author Igor Sysoev <igor@sysoev.ru>
date Mon, 10 Nov 2003 21:09:22 +0000
parents b48066122884
children 9f3a78b06c48
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4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
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4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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2 #include <ngx_config.h>
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a8ff48d26cca nginx-0.0.1-2003-11-11-00:09:22 import
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3 #include <ngx_core.h>
a8ff48d26cca nginx-0.0.1-2003-11-11-00:09:22 import
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4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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6 void ngx_localtime(ngx_tm_t *tm)
4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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7 {
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a8ff48d26cca nginx-0.0.1-2003-11-11-00:09:22 import
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8 localtime_r(&ngx_cached_time, tm);
a8ff48d26cca nginx-0.0.1-2003-11-11-00:09:22 import
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a117a7fdf042 nginx-0.0.1-2002-12-16-00:08:04 import
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10 tm->ngx_tm_mon++;
a117a7fdf042 nginx-0.0.1-2002-12-16-00:08:04 import
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11 tm->ngx_tm_year += 1900;
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4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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12 }
4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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14 u_int ngx_msec(void)
4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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15 {
4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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16 struct timeval tv;
4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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17
4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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18 gettimeofday(&tv, NULL);
4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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20 return tv.tv_sec * 1000 + tv.tv_usec / 1000;
4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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21 }
4eff17414a43 nginx-0.0.1-2002-08-06-20:39:45 import
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d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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24 #if 0
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25
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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26 typedef struct {
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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27 int busy;
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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28 u_int_64 msec;
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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29 time_t sec;
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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30 tm;
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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31 http_time_len;
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b48066122884 nginx-0.0.1-2003-05-23-15:53:01 import
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32 http_time[n];
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33 };
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35 volatile *ngx_time_p;
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36
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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37 ngx_time()
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38 {
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39 p = ngx_time_p;
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40 }
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41
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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42 ngx_update_time()
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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43 {
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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44 u_int64 msec;
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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45 struct timeval tv;
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46
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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47 gettimeofday(&tv, NULL);
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48
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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49 msec = (unsigned long) tv.tv_sec * 1000 + tv.tv_usec / 1000;
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50 p = ngx_time_p;
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51
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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52 /* minimum can be for example 0, 10, 50 or 100 ms */
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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53 if (tv_sec > p->sec || msec - p->msec >= minimum) {
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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54 old_p = p;
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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55 /* max_tries < max_slots - 10,
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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56 max_slots should be more than max of threads */
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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57 for (/* void */; i < max_tries; i++) {
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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58 if (++p >= last_slot)
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59 p = first_slot;
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61 if (!test_and_set(p->busy)
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62 break;
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63 }
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64
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65 if (i == max_tries) {
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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66 ngx_log_error();
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67 return;
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68 }
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69
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70 if (tv_sec > p->sec) {
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71 p->sec = tv.tv.sec;
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72 p->msec = msec;
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73 localtime_r(&tv.tv_sec, tm);
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74 make http stirng;
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75
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76 } else {
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77 ngx_memcpy(p->sec, old_p->sec, sizeof() - offset_of(, sec));
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78 p->msec = msec;
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79 }
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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80
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81 /* here can be too seldom and non-critical race condition */
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82 if (ngx_time_p == old_p)
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83 ngx_time_p = p;
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84
d220029ac7f3 nginx-0.0.1-2002-08-15-21:20:26 import
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85 unlock(p->busy);
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86 }
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87 }
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88
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89 #endif