| 1 |
AC_DEFUN([AX_ARG_IOLOOP_MECHANISM],[ |
| 2 |
desired_iopoll_mechanism="none" |
| 3 |
dnl FIXME need to handle arguments a bit better (see ac_arg_disable_block_alloc) |
| 4 |
|
| 5 |
AC_ARG_ENABLE([kqueue], [AS_HELP_STRING([--enable-kqueue], [Force kqueue usage.])], [desired_iopoll_mechanism="kqueue"]) |
| 6 |
AC_ARG_ENABLE([epoll], [AS_HELP_STRING([--enable-epoll], [Force epoll usage.])], [desired_iopoll_mechanism="epoll"]) |
| 7 |
AC_ARG_ENABLE([devpoll],[AS_HELP_STRING([--enable-devpoll],[Force devpoll usage.])],[desired_iopoll_mechanism="devpoll"]) |
| 8 |
AC_ARG_ENABLE([poll], [AS_HELP_STRING([--enable-poll], [Force poll usage.])], [desired_iopoll_mechanism="poll"]) |
| 9 |
|
| 10 |
AC_MSG_CHECKING([for optimal/desired iopoll mechanism]) |
| 11 |
|
| 12 |
iopoll_mechanism_none=0 |
| 13 |
AC_DEFINE_UNQUOTED([__IOPOLL_MECHANISM_NONE],[$iopoll_mechanism_none],[no iopoll mechanism]) |
| 14 |
|
| 15 |
iopoll_mechanism_kqueue=1 |
| 16 |
AC_DEFINE_UNQUOTED([__IOPOLL_MECHANISM_KQUEUE],[$iopoll_mechanism_kqueue],[kqueue mechanism]) |
| 17 |
AC_LINK_IFELSE([AC_LANG_FUNC_LINK_TRY([kevent])],[is_kqueue_mechanism_available="yes"],[is_kqueue_mechanism_available="no"]) |
| 18 |
|
| 19 |
iopoll_mechanism_epoll=2 |
| 20 |
AC_DEFINE_UNQUOTED([__IOPOLL_MECHANISM_EPOLL],[$iopoll_mechanism_epoll],[epoll mechanism]) |
| 21 |
AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <sys/epoll.h>], [epoll_create1(EPOLL_CLOEXEC);])], [is_epoll_mechanism_available="yes"],[is_epoll_mechanism_available="no"]) |
| 22 |
|
| 23 |
iopoll_mechanism_devpoll=3 |
| 24 |
AC_DEFINE_UNQUOTED([__IOPOLL_MECHANISM_DEVPOLL],[$iopoll_mechanism_devpoll],[devpoll mechanism]) |
| 25 |
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <devpoll.h>])],[is_devpoll_mechanism_available="yes"],[is_devpoll_mechanism_available="no"]) |
| 26 |
if test "$is_devpoll_mechanism_available" = "yes" ; then |
| 27 |
AC_DEFINE([HAVE_DEVPOLL_H],[1],[Define to 1 if you have the <devpoll.h> header file.]) |
| 28 |
fi |
| 29 |
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/devpoll.h>])],[is_devpoll_mechanism_available="yes"],[is_devpoll_mechanism_available="no"]) |
| 30 |
if test "$is_devpoll_mechanism_available" = "yes" ; then |
| 31 |
AC_DEFINE([HAVE_SYS_DEVPOLL_H],[1],[Define to 1 if you have the <sys/devpoll.h> header file.]) |
| 32 |
fi |
| 33 |
|
| 34 |
iopoll_mechanism_poll=4 |
| 35 |
AC_DEFINE_UNQUOTED([__IOPOLL_MECHANISM_POLL],[$iopoll_mechanism_poll],[poll mechanism]) |
| 36 |
AC_LINK_IFELSE([AC_LANG_FUNC_LINK_TRY([poll])],[is_poll_mechanism_available="yes"],[is_poll_mechanism_available="no"]) |
| 37 |
|
| 38 |
optimal_iopoll_mechanism="none" |
| 39 |
for mechanism in "kqueue" "epoll" "devpoll" "poll" ; do # order is important |
| 40 |
eval "is_optimal_iopoll_mechanism_available=\$is_${mechanism}_mechanism_available" |
| 41 |
if test "$is_optimal_iopoll_mechanism_available" = "yes" ; then |
| 42 |
optimal_iopoll_mechanism="$mechanism" |
| 43 |
break |
| 44 |
fi |
| 45 |
done |
| 46 |
|
| 47 |
if test "$desired_iopoll_mechanism" = "none" ; then |
| 48 |
if test "$optimal_iopoll_mechanism" = "none" ; then |
| 49 |
AC_MSG_RESULT([none]) |
| 50 |
AC_MSG_ERROR([no iopoll mechanism found!]) |
| 51 |
else |
| 52 |
selected_iopoll_mechanism=$optimal_iopoll_mechanism |
| 53 |
AC_MSG_RESULT([$selected_iopoll_mechanism]) |
| 54 |
fi |
| 55 |
else |
| 56 |
eval "is_desired_iopoll_mechanism_available=\$is_${desired_iopoll_mechanism}_mechanism_available" |
| 57 |
if test "$is_desired_iopoll_mechanism_available" = "yes" ; then |
| 58 |
selected_iopoll_mechanism=$desired_iopoll_mechanism |
| 59 |
AC_MSG_RESULT([$selected_iopoll_mechanism]) |
| 60 |
else |
| 61 |
AC_MSG_RESULT([none]) |
| 62 |
AC_MSG_ERROR([desired iopoll mechanism, $desired_iopoll_mechanism, is not available]) |
| 63 |
fi |
| 64 |
fi |
| 65 |
|
| 66 |
eval "use_iopoll_mechanism=\$iopoll_mechanism_${selected_iopoll_mechanism}" |
| 67 |
AC_DEFINE_UNQUOTED([USE_IOPOLL_MECHANISM],[$use_iopoll_mechanism],[use this iopoll mechanism]) |
| 68 |
]) |
