Commit ed898b28 authored by Kurt Zeilenga's avatar Kurt Zeilenga
Browse files

Replace sched_yield(2) on Linux with select(2) (ITS#3950)

parent ba8a18a0
OpenLDAP 2.3 Change Log
OpenLDAP 2.3.16 Engineering
Build environment
Replace sched_yield(2) on Linux with select(2) (ITS#3950)
OpenLDAP 2.3.15 Release
Fixed slapd strerror logging bug (ITS#4292)
......
#! /bin/sh
# From configure.in OpenLDAP: pkg/ldap/configure.in,v 1.560.2.18 2005/11/26 17:01:54 kurt Exp .
# From configure.in OpenLDAP: pkg/ldap/configure.in,v 1.560.2.20 2006/01/03 22:16:00 kurt Exp .
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.59.
#
......@@ -24740,6 +24740,21 @@ echo "${ECHO_T}$ol_cv_pthread_create_works" >&6
{ { echo "$as_me:$LINENO: error: pthread_create is not usable, check environment settings" >&5
echo "$as_me: error: pthread_create is not usable, check environment settings" >&2;}
{ (exit 1); exit 1; }; }
fi
ol_replace_broken_yield=no
case "$target" in
*-*-linux*)
ol_replace_broken_yield=yes
;;
esac
if test $ol_replace_broken_yield = yes ; then
cat >>confdefs.h <<\_ACEOF
#define REPLACE_BROKEN_YIELD 1
_ACEOF
fi
 
if test $ol_with_yielding_select = auto ; then
......@@ -42898,7 +42913,6 @@ fi
 
 
 
 
 
for ac_func in \
......@@ -42950,7 +42964,6 @@ for ac_func in \
strtoll \
strspn \
sysconf \
usleep \
waitpid \
wait4 \
write \
......@@ -1585,6 +1585,18 @@ dnl [ol_cv_pthread_lpthread_lexc])
AC_MSG_ERROR([pthread_create is not usable, check environment settings])
fi
ol_replace_broken_yield=no
case "$target" in
*-*-linux*)
ol_replace_broken_yield=yes
;;
esac
if test $ol_replace_broken_yield = yes ; then
AC_DEFINE([REPLACE_BROKEN_YIELD],1,
[define if sched_yield yields the entire process])
fi
dnl Check if select causes an yield
if test $ol_with_yielding_select = auto ; then
AC_CACHE_CHECK([if select yields when using pthreads],
......@@ -2564,7 +2576,6 @@ AC_CHECK_FUNCS( \
strtoll \
strspn \
sysconf \
usleep \
waitpid \
wait4 \
write \
......
......@@ -777,9 +777,6 @@
/* Define to 1 if you have the <unistd.h> header file. */
#undef HAVE_UNISTD_H
/* Define to 1 if you have the `usleep' function. */
#undef HAVE_USLEEP
/* Define to 1 if you have the <utime.h> header file. */
#undef HAVE_UTIME_H
......@@ -903,6 +900,9 @@
/* Define to the version of this package. */
#undef PACKAGE_VERSION
/* define if sched_yield yields the entire process */
#undef REPLACE_BROKEN_YIELD
/* Define as the return type of signal handlers (`int' or `void'). */
#undef RETSIGTYPE
......
......@@ -20,6 +20,13 @@
#include <ac/errno.h>
#ifdef REPLACE_BROKEN_YIELD
#ifndef HAVE_NANOSLEEP
#include <ac/socket.h>
#endif
#include <ac/time.h>
#endif
#include "ldap_pvt_thread.h" /* Get the thread interface */
#define LDAP_THREAD_IMPLEMENTATION
#define LDAP_THREAD_RDWR_IMPLEMENTATION
......@@ -207,7 +214,16 @@ ldap_pvt_thread_kill( ldap_pvt_thread_t thread, int signo )
int
ldap_pvt_thread_yield( void )
{
#if HAVE_THR_YIELD
#ifdef REPLACE_BROKEN_YIELD
#ifdef HAVE_NANOSLEEP
struct timespec t = { 0, 0 };
nanosleep(&t, NULL);
#else
struct timeval tv = {0,0};
select( 0, NULL, NULL, NULL, &tv );
#endif
return 0;
#elif HAVE_THR_YIELD
return thr_yield();
#elif HAVE_PTHREADS == 10
......
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