Mercurial > hg > nginx-quic
view auto/lib/pcre/conf @ 8369:2ed5d03c2d90
Events: fixed expiration of timers in the past.
If, at the start of an event loop iteration, there are any timers
in the past (including timers expiring now), the ngx_process_events()
function is called with zero timeout, and returns immediately even
if there are no events. But the following code only calls
ngx_event_expire_timers() if time actually changed, so this results
in nginx spinning in the event loop till current time changes.
While such timers are not expected to appear under normal conditions,
as all such timers should be removed on previous event loop iterations,
they still can appear due to bugs, zero timeouts set in the configuration
(if this is not explicitly handled by the code), or due to external
time changes on systems without clock_gettime(CLOCK_MONOTONIC).
Fix is to call ngx_event_expire_timers() unconditionally. Calling
it on each event loop iteration is not expected to be significant from
performance point of view, especially compared to a syscall in
ngx_process_events().
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Fri, 26 Mar 2021 01:44:59 +0300 |
parents | 78f8ac479735 |
children | 8007ea138d6a |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. if [ $PCRE != NONE ]; then CORE_INCS="$CORE_INCS $PCRE" case "$NGX_CC_NAME" in msvc | owc | bcc) have=NGX_PCRE . auto/have have=PCRE_STATIC . auto/have CORE_DEPS="$CORE_DEPS $PCRE/pcre.h" LINK_DEPS="$LINK_DEPS $PCRE/pcre.lib" CORE_LIBS="$CORE_LIBS $PCRE/pcre.lib" ;; icc) have=NGX_PCRE . auto/have CORE_DEPS="$CORE_DEPS $PCRE/pcre.h" LINK_DEPS="$LINK_DEPS $PCRE/.libs/libpcre.a" echo $ngx_n "checking for PCRE library ...$ngx_c" if [ -f $PCRE/pcre.h ]; then ngx_pcre_ver=`grep PCRE_MAJOR $PCRE/pcre.h \ | sed -e 's/^.*PCRE_MAJOR.* \(.*\)$/\1/'` else if [ -f $PCRE/configure.in ]; then ngx_pcre_ver=`grep PCRE_MAJOR= $PCRE/configure.in \ | sed -e 's/^.*=\(.*\)$/\1/'` else ngx_pcre_ver=`grep pcre_major, $PCRE/configure.ac \ | sed -e 's/^.*pcre_major,.*\[\(.*\)\].*$/\1/'` fi fi echo " $ngx_pcre_ver major version found" # to allow -ipo optimization we link with the *.o but not library case "$ngx_pcre_ver" in 4|5) CORE_LIBS="$CORE_LIBS $PCRE/pcre.o" ;; 6) CORE_LIBS="$CORE_LIBS $PCRE/pcre_chartables.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_compile.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_exec.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_fullinfo.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_globals.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_tables.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_try_flipped.o" ;; *) CORE_LIBS="$CORE_LIBS $PCRE/pcre_chartables.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_compile.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_exec.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_fullinfo.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_globals.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_tables.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_try_flipped.o" CORE_LIBS="$CORE_LIBS $PCRE/pcre_newline.o" ;; esac ;; *) have=NGX_PCRE . auto/have if [ "$NGX_PLATFORM" = win32 ]; then have=PCRE_STATIC . auto/have fi CORE_DEPS="$CORE_DEPS $PCRE/pcre.h" LINK_DEPS="$LINK_DEPS $PCRE/.libs/libpcre.a" CORE_LIBS="$CORE_LIBS $PCRE/.libs/libpcre.a" ;; esac if [ $PCRE_JIT = YES ]; then have=NGX_HAVE_PCRE_JIT . auto/have PCRE_CONF_OPT="$PCRE_CONF_OPT --enable-jit" fi else if [ "$NGX_PLATFORM" != win32 ]; then PCRE=NO ngx_feature="PCRE library" ngx_feature_name="NGX_PCRE" ngx_feature_run=no ngx_feature_incs="#include <pcre.h>" ngx_feature_path= ngx_feature_libs="-lpcre" ngx_feature_test="pcre *re; re = pcre_compile(NULL, 0, NULL, 0, NULL); if (re == NULL) return 1" . auto/feature if [ $ngx_found = no ]; then # FreeBSD port ngx_feature="PCRE library in /usr/local/" ngx_feature_path="/usr/local/include" if [ $NGX_RPATH = YES ]; then ngx_feature_libs="-R/usr/local/lib -L/usr/local/lib -lpcre" else ngx_feature_libs="-L/usr/local/lib -lpcre" fi . auto/feature fi if [ $ngx_found = no ]; then # RedHat RPM, Solaris package ngx_feature="PCRE library in /usr/include/pcre/" ngx_feature_path="/usr/include/pcre" ngx_feature_libs="-lpcre" . auto/feature fi if [ $ngx_found = no ]; then # NetBSD port ngx_feature="PCRE library in /usr/pkg/" ngx_feature_path="/usr/pkg/include" if [ $NGX_RPATH = YES ]; then ngx_feature_libs="-R/usr/pkg/lib -L/usr/pkg/lib -lpcre" else ngx_feature_libs="-L/usr/pkg/lib -lpcre" fi . auto/feature fi if [ $ngx_found = no ]; then # MacPorts ngx_feature="PCRE library in /opt/local/" ngx_feature_path="/opt/local/include" if [ $NGX_RPATH = YES ]; then ngx_feature_libs="-R/opt/local/lib -L/opt/local/lib -lpcre" else ngx_feature_libs="-L/opt/local/lib -lpcre" fi . auto/feature fi if [ $ngx_found = yes ]; then CORE_INCS="$CORE_INCS $ngx_feature_path" CORE_LIBS="$CORE_LIBS $ngx_feature_libs" PCRE=YES fi if [ $PCRE = YES ]; then ngx_feature="PCRE JIT support" ngx_feature_name="NGX_HAVE_PCRE_JIT" ngx_feature_test="int jit = 0; pcre_free_study(NULL); pcre_config(PCRE_CONFIG_JIT, &jit); if (jit != 1) return 1;" . auto/feature if [ $ngx_found = yes ]; then PCRE_JIT=YES fi fi fi if [ $PCRE != YES ]; then cat << END $0: error: the HTTP rewrite module requires the PCRE library. You can either disable the module by using --without-http_rewrite_module option, or install the PCRE library into the system, or build the PCRE library statically from the source with nginx by using --with-pcre=<path> option. END exit 1 fi fi