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master
Marc Alexander Lehmann 12 years ago
parent
commit
0da5bf856d
  1. 8
      Changes
  2. 45
      ev.c
  3. 12
      ev.pod

8
Changes

@ -1,5 +1,11 @@
Revision history for libev, a high-performance and full-featured event loop.
- probe for CLOCK_REALTIME support at runtime as well and fall
back to gettimeofday if there is an error, to support older
operating systems with newer header files/libraries.
- prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
(default most everywhere), otherwise not.
3.52 Wed Jan 7 21:43:02 CET 2009
- fix compilation of select backend in fd_set mode when NFDBITS is
missing (to get it to compile on QNX, reported by Rodrigo Campos).
@ -13,7 +19,7 @@ Revision history for libev, a high-performance and full-featured event loop.
attacks harder (but not impossible - it's windows). Make sure
it even works under vista, which thinks that getpeer/sockname
should return fantasy port numbers.
- include "libev" all assertion messages for potentially
- include "libev" in all assertion messages for potentially
clearer diagnostics.
- event_get_version (libevent compatibility) returned
a useless string instead of the expected version string

45
ev.c

@ -66,7 +66,7 @@ extern "C" {
# define EV_USE_MONOTONIC 1
# endif
# ifndef EV_USE_REALTIME
# define EV_USE_REALTIME 1
# define EV_USE_REALTIME 0
# endif
# else
# ifndef EV_USE_MONOTONIC
@ -195,7 +195,7 @@ extern "C" {
#endif
#ifndef EV_USE_REALTIME
# define EV_USE_REALTIME 0
# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
#endif
#ifndef EV_USE_NANOSLEEP
@ -399,9 +399,13 @@ typedef ev_watcher_time *WT;
#define ev_active(w) ((W)(w))->active
#define ev_at(w) ((WT)(w))->at
#if EV_USE_MONOTONIC
#if EV_USE_REALTIME
/* sig_atomic_t is used to avoid per-thread variables or locking but still */
/* giving it a reasonably high chance of working on typical architetcures */
static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
#endif
#if EV_USE_MONOTONIC
static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
#endif
@ -555,14 +559,17 @@ ev_tstamp
ev_time (void)
{
#if EV_USE_REALTIME
struct timespec ts;
clock_gettime (CLOCK_REALTIME, &ts);
return ts.tv_sec + ts.tv_nsec * 1e-9;
#else
if (expect_true (have_realtime))
{
struct timespec ts;
clock_gettime (CLOCK_REALTIME, &ts);
return ts.tv_sec + ts.tv_nsec * 1e-9;
}
#endif
struct timeval tv;
gettimeofday (&tv, 0);
return tv.tv_sec + tv.tv_usec * 1e-6;
#endif
}
ev_tstamp inline_size
@ -1321,12 +1328,24 @@ loop_init (EV_P_ unsigned int flags)
{
if (!backend)
{
#if EV_USE_REALTIME
if (!have_realtime)
{
struct timespec ts;
if (!clock_gettime (CLOCK_REALTIME, &ts))
have_realtime = 1;
}
#endif
#if EV_USE_MONOTONIC
{
struct timespec ts;
if (!clock_gettime (CLOCK_MONOTONIC, &ts))
have_monotonic = 1;
}
if (!have_monotonic)
{
struct timespec ts;
if (!clock_gettime (CLOCK_MONOTONIC, &ts))
have_monotonic = 1;
}
#endif
ev_rt_now = ev_time ();

12
ev.pod

@ -3231,11 +3231,13 @@ function is hiding in (often F<-lrt>). See also C<EV_USE_CLOCK_SYSCALL>.
=item EV_USE_REALTIME
If defined to be C<1>, libev will try to detect the availability of the
real-time clock option at compile time (and assume its availability at
runtime if successful). Otherwise no use of the real-time clock option will
be attempted. This effectively replaces C<gettimeofday> by C<clock_get
(CLOCK_REALTIME, ...)> and will not normally affect correctness. See the
note about libraries in the description of C<EV_USE_MONOTONIC>, though.
real-time clock option at compile time (and assume its availability
at runtime if successful). Otherwise no use of the real-time clock
option will be attempted. This effectively replaces C<gettimeofday>
by C<clock_get (CLOCK_REALTIME, ...)> and will not normally affect
correctness. See the note about libraries in the description of
C<EV_USE_MONOTONIC>, though. Defaults to the opposite value of
C<EV_USE_CLOCK_SYSCALL>.
=item EV_USE_CLOCK_SYSCALL

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