From 04e9dd936bfe30c2121997b1f7ef37b0ac7eb52a Mon Sep 17 00:00:00 2001
From: root <root>
Date: Thu, 20 Nov 2008 00:35:10 +0000
Subject: *** empty log message ***

---
 ev.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'ev.c')

diff --git a/ev.c b/ev.c
index c872176..538f6a5 100644
--- a/ev.c
+++ b/ev.c
@@ -49,6 +49,18 @@ extern "C" {
 #  include "config.h"
 # endif
 
+# if HAVE_CLOCK_SYSCALL
+#  ifndef EV_USE_CLOCK_SYSCALL
+#   define EV_USE_CLOCK_SYSCALL 1
+#   ifndef EV_USE_REALTIME
+#    define EV_USE_REALTIME  0
+#   endif
+#   ifndef EV_USE_MONOTONIC
+#    define EV_USE_MONOTONIC 1
+#   endif
+#  endif
+# endif
+
 # if HAVE_CLOCK_GETTIME
 #  ifndef EV_USE_MONOTONIC
 #   define EV_USE_MONOTONIC 1
@@ -166,6 +178,14 @@ extern "C" {
 
 /* this block tries to deduce configuration from header-defined symbols and defaults */
 
+#ifndef EV_USE_CLOCK_SYSCALL
+# if __linux && __GLIBC__ >= 2
+#  define EV_USE_CLOCK_SYSCALL 1
+# else
+#  define EV_USE_CLOCK_SYSCALL 0
+# endif
+#endif
+
 #ifndef EV_USE_MONOTONIC
 # if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
 #  define EV_USE_MONOTONIC 1
@@ -302,6 +322,15 @@ extern "C" {
 # include <winsock.h>
 #endif
 
+/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
+/* which makes programs even slower. might work on other unices, too. */
+#if EV_USE_CLOCK_SYSCALL
+# include <syscall.h>
+# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
+# undef EV_USE_MONOTONIC
+# define EV_USE_MONOTONIC 1
+#endif
+
 #if EV_USE_EVENTFD
 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
 # include <stdint.h>
-- 
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