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Comparing libev/ev.c (file contents):
Revision 1.289 by root, Sat Jun 6 11:13:16 2009 UTC vs.
Revision 1.293 by root, Mon Jun 29 18:46:52 2009 UTC

… …
57# endif 57# endif
58# ifndef EV_USE_MONOTONIC 58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1 59# define EV_USE_MONOTONIC 1
60# endif 60# endif
61# endif 61# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
62# endif 64# endif
63 65
64# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC 67# ifndef EV_USE_MONOTONIC
66# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
… …
282 284
283#ifndef EV_HEAP_CACHE_AT 285#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL 286# define EV_HEAP_CACHE_AT !EV_MINIMAL
285#endif 287#endif
286 288
289/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
290/* which makes programs even slower. might work on other unices, too. */
291#if EV_USE_CLOCK_SYSCALL
292# include <syscall.h>
293# ifdef SYS_clock_gettime
294# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
295# undef EV_USE_MONOTONIC
296# define EV_USE_MONOTONIC 1
297# else
298# undef EV_USE_CLOCK_SYSCALL
299# define EV_USE_CLOCK_SYSCALL 0
300# endif
301#endif
302
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 303/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288 304
289#ifndef CLOCK_MONOTONIC 305#ifndef CLOCK_MONOTONIC
290# undef EV_USE_MONOTONIC 306# undef EV_USE_MONOTONIC
291# define EV_USE_MONOTONIC 0 307# define EV_USE_MONOTONIC 0
… …
320 336
321#if EV_SELECT_IS_WINSOCKET 337#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h> 338# include <winsock.h>
323#endif 339#endif
324 340
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD 341#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 342/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h> 343# include <stdint.h>
337# ifdef __cplusplus 344# ifdef __cplusplus
338extern "C" { 345extern "C" {
… …
557 564
558#endif 565#endif
559 566
560/*****************************************************************************/ 567/*****************************************************************************/
561 568
569#ifndef EV_HAVE_EV_TIME
562ev_tstamp 570ev_tstamp
563ev_time (void) 571ev_time (void)
564{ 572{
565#if EV_USE_REALTIME 573#if EV_USE_REALTIME
566 if (expect_true (have_realtime)) 574 if (expect_true (have_realtime))
… …
573 581
574 struct timeval tv; 582 struct timeval tv;
575 gettimeofday (&tv, 0); 583 gettimeofday (&tv, 0);
576 return tv.tv_sec + tv.tv_usec * 1e-6; 584 return tv.tv_sec + tv.tv_usec * 1e-6;
577} 585}
586#endif
578 587
579inline_size ev_tstamp 588inline_size ev_tstamp
580get_clock (void) 589get_clock (void)
581{ 590{
582#if EV_USE_MONOTONIC 591#if EV_USE_MONOTONIC
… …
618 627
619 tv.tv_sec = (time_t)delay; 628 tv.tv_sec = (time_t)delay;
620 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 629 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
621 630
622 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 631 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
623 /* somehting nto guaranteed by newer posix versions, but guaranteed */ 632 /* somehting not guaranteed by newer posix versions, but guaranteed */
624 /* by older ones */ 633 /* by older ones */
625 select (0, 0, 0, 0, &tv); 634 select (0, 0, 0, 0, &tv);
626#endif 635#endif
627 } 636 }
628} 637}
… …
2066 ev_tstamp waittime = 0.; 2075 ev_tstamp waittime = 0.;
2067 ev_tstamp sleeptime = 0.; 2076 ev_tstamp sleeptime = 0.;
2068 2077
2069 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2078 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2070 { 2079 {
2080 /* remember old timestamp for io_blocktime calculation */
2081 ev_tstamp prev_mn_now = mn_now;
2082
2071 /* update time to cancel out callback processing overhead */ 2083 /* update time to cancel out callback processing overhead */
2072 time_update (EV_A_ 1e100); 2084 time_update (EV_A_ 1e100);
2073 2085
2074 waittime = MAX_BLOCKTIME; 2086 waittime = MAX_BLOCKTIME;
2075 2087
… …
2085 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2097 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2086 if (waittime > to) waittime = to; 2098 if (waittime > to) waittime = to;
2087 } 2099 }
2088#endif 2100#endif
2089 2101
2102 /* don't let timeouts decrease the waittime below timeout_blocktime */
2090 if (expect_false (waittime < timeout_blocktime)) 2103 if (expect_false (waittime < timeout_blocktime))
2091 waittime = timeout_blocktime; 2104 waittime = timeout_blocktime;
2092 2105
2093 sleeptime = waittime - backend_fudge; 2106 /* extra check because io_blocktime is commonly 0 */
2094
2095 if (expect_true (sleeptime > io_blocktime)) 2107 if (expect_false (io_blocktime))
2096 sleeptime = io_blocktime;
2097
2098 if (sleeptime)
2099 { 2108 {
2109 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2110
2111 if (sleeptime > waittime - backend_fudge)
2112 sleeptime = waittime - backend_fudge;
2113
2114 if (expect_true (sleeptime > 0.))
2115 {
2100 ev_sleep (sleeptime); 2116 ev_sleep (sleeptime);
2101 waittime -= sleeptime; 2117 waittime -= sleeptime;
2118 }
2102 } 2119 }
2103 } 2120 }
2104 2121
2105 ++loop_count; 2122 ++loop_count;
2106 backend_poll (EV_A_ waittime); 2123 backend_poll (EV_A_ waittime);

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