1 files changed, 128 insertions, 0 deletions
diff --git a/server/mpm/config.m4 b/server/mpm/config.m4
new file mode 100644
index 0000000..6d3ab86
--- /dev/null
+++ b/server/mpm/config.m4
@@ -0,0 +1,128 @@
+dnl common platform checks needed by MPMs, methods for MPMs to state
+dnl their support for the platform, functions to query MPM properties
+
+APR_CHECK_APR_DEFINE(APR_HAS_THREADS)
+
+have_threaded_sig_graceful=yes
+case $host in
+    *-linux-*)
+        case `uname -r` in
+          2.0* )
+            dnl Threaded MPM's are not supported on Linux 2.0
+            dnl as on 2.0 the linuxthreads library uses SIGUSR1
+            dnl and SIGUSR2 internally
+            have_threaded_sig_graceful=no
+          ;;
+        esac
+    ;;
+esac
+
+dnl See if APR supports APR_POLLSET_THREADSAFE.
+dnl XXX This hack tests for the underlying functions used by APR when it supports
+dnl XXX APR_POLLSET_THREADSAFE, and duplicates APR's Darwin version check.
+dnl A run-time check for
+dnl     apr_pollset_create(,,APR_POLLSET_THREADSAFE) == APR_SUCCESS
+dnl would be great but an in-tree apr (srclib/apr) hasn't been built yet.
+
+AC_CACHE_CHECK([whether APR supports thread-safe pollsets], [ac_cv_have_threadsafe_pollset], [
+    case $host in
+        *-apple-darwin[[1-9]].*)
+            APR_SETIFNULL(ac_cv_func_kqueue, [no])
+            ;;
+    esac
+    AC_CHECK_FUNCS(kqueue port_create epoll_create)
+    if test "$ac_cv_func_kqueue$ac_cv_func_port_create$ac_cv_func_epoll_create" != "nonono"; then
+        ac_cv_have_threadsafe_pollset=yes
+    else
+        ac_cv_have_threadsafe_pollset=no
+    fi
+])
+
+dnl See if APR has skiplist
+dnl The base httpd prereq is APR 1.4.x, so we don't have to consider
+dnl earlier versions.
+case $APR_VERSION in
+    1.4*)
+        apr_has_skiplist=no
+        ;;
+    *)
+        apr_has_skiplist=yes
+esac
+
+dnl See if this is a forking platform w.r.t. MPMs
+case $host in
+    *mingw32* | *os2-emx*)
+        forking_mpms_supported=no
+        ;;
+    *)
+        forking_mpms_supported=yes
+        ;;
+esac
+
+dnl APACHE_MPM_SUPPORTED(name, supports-shared, is_threaded)
+AC_DEFUN([APACHE_MPM_SUPPORTED],[
+    if test "$2" = "yes"; then
+        eval "ap_supported_mpm_$1=shared"
+        ap_supported_shared_mpms="$ap_supported_shared_mpms $1 "
+    else
+        eval "ap_supported_mpm_$1=static"
+    fi
+    if test "$3" = "yes"; then
+        eval "ap_threaded_mpm_$1=yes"
+    fi
+])dnl
+
+dnl APACHE_MPM_ENABLED(name)
+AC_DEFUN([APACHE_MPM_ENABLED],[
+    if ap_mpm_is_enabled $1; then
+        :
+    else
+        eval "ap_enabled_mpm_$1=yes"
+        ap_enabled_mpms="$ap_enabled_mpms $1 "
+    fi
+])dnl
+
+ap_mpm_is_supported ()
+{
+    eval "tmp=\$ap_supported_mpm_$1"
+    if test -z "$tmp"; then
+        return 1
+    else
+        return 0
+    fi
+}
+
+ap_mpm_supports_shared ()
+{
+    eval "tmp=\$ap_supported_mpm_$1"
+    if test "$tmp" = "shared"; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+ap_mpm_is_threaded ()
+{
+    if test "$mpm_build" = "shared" -a ac_cv_define_APR_HAS_THREADS = "yes"; then
+        return 0
+    fi
+
+    for mpm in $ap_enabled_mpms; do
+        eval "tmp=\$ap_threaded_mpm_$mpm"
+        if test "$tmp" = "yes"; then
+            return 0
+        fi
+    done
+    return 1
+}
+
+ap_mpm_is_enabled ()
+{
+    eval "tmp=\$ap_enabled_mpm_$1"
+    if test "$tmp" = "yes"; then
+        return 0
+    else
+        return 1
+    fi
+}