diff options
Diffstat (limited to 'ev.pod')
| -rw-r--r-- | ev.pod | 22 |
1 files changed, 16 insertions, 6 deletions
@@ -2739,9 +2739,9 @@ For this of course you need the m4 file: =head2 PREPROCESSOR SYMBOLS/MACROS -Libev can be configured via a variety of preprocessor symbols you have to define -before including any of its files. The default is not to build for multiplicity -and only include the select backend. +Libev can be configured via a variety of preprocessor symbols you have to +define before including any of its files. The default in the absense of +autoconf is noted for every option. =over 4 @@ -2777,6 +2777,14 @@ note about libraries in the description of C<EV_USE_MONOTONIC>, though. If defined to be C<1>, libev will assume that C<nanosleep ()> is available and will use it for delays. Otherwise it will use C<select ()>. +=item EV_USE_EVENTFD + +If defined to be C<1>, then libev will assume that C<eventfd ()> is +available and will probe for kernel support at runtime. This will improve +C<ev_signal> and C<ev_async> performance and reduce resource consumption. +If undefined, it will be enabled if the headers indicate GNU/Linux + Glibc +2.7 or newer, otherwise disabled. + =item EV_USE_SELECT If undefined or defined to be C<1>, libev will compile in support for the @@ -2822,8 +2830,9 @@ takes precedence over select. If defined to be C<1>, libev will compile in support for the Linux C<epoll>(7) backend. Its availability will be detected at runtime, -otherwise another method will be used as fallback. This is the -preferred backend for GNU/Linux systems. +otherwise another method will be used as fallback. This is the preferred +backend for GNU/Linux systems. If undefined, it will be enabled if the +headers indicate GNU/Linux + Glibc 2.4 or newer, otherwise disabled. =item EV_USE_KQUEUE @@ -2852,7 +2861,8 @@ reserved for future expansion, works like the USE symbols above. If defined to be C<1>, libev will compile in support for the Linux inotify interface to speed up C<ev_stat> watchers. Its actual availability will -be detected at runtime. +be detected at runtime. If undefined, it will be enabled if the headers +indicate GNU/Linux + Glibc 2.4 or newer, otherwise disabled. =item EV_ATOMIC_T |