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+dnl Copyright 2012 The Kyua Authors.
+dnl All rights reserved.
+dnl
+dnl Redistribution and use in source and binary forms, with or without
+dnl modification, are permitted provided that the following conditions are
+dnl met:
+dnl
+dnl * Redistributions of source code must retain the above copyright
+dnl notice, this list of conditions and the following disclaimer.
+dnl * Redistributions in binary form must reproduce the above copyright
+dnl notice, this list of conditions and the following disclaimer in the
+dnl documentation and/or other materials provided with the distribution.
+dnl * Neither the name of Google Inc. nor the names of its contributors
+dnl may be used to endorse or promote products derived from this software
+dnl without specific prior written permission.
+dnl
+dnl THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+dnl "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+dnl LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+dnl A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+dnl OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+dnl SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+dnl LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+dnl DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+dnl THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+dnl (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+dnl OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+dnl \file m4/memory.m4
+dnl
+dnl Macros to configure the utils::memory module.
+
+
+dnl Entry point to detect all features needed by utils::memory.
+dnl
+dnl This looks for a mechanism to check the available physical memory in the
+dnl system.
+AC_DEFUN([KYUA_MEMORY], [
+ memory_query=unknown
+ memory_mib=none
+
+ _KYUA_SYSCTLBYNAME([have_sysctlbyname=yes], [have_sysctlbyname=no])
+ if test "${have_sysctlbyname}" = yes; then
+ _KYUA_SYSCTL_MIB([hw.usermem64], [hw_usermem64],
+ [memory_mib="hw.usermem64"], [])
+ if test "${memory_mib}" = none; then
+ _KYUA_SYSCTL_MIB([hw.usermem], [hw_usermem],
+ [memory_mib="hw.usermem"], [])
+ fi
+ if test "${memory_mib}" != none; then
+ memory_query=sysctlbyname
+ fi
+ fi
+
+ if test "${memory_query}" = unknown; then
+ AC_MSG_WARN([Don't know how to query the amount of physical memory])
+ AC_MSG_WARN([The test case's require.memory property will not work])
+ fi
+
+ AC_DEFINE_UNQUOTED([MEMORY_QUERY_TYPE], ["${memory_query}"],
+ [Define to the memory query type])
+ AC_DEFINE_UNQUOTED([MEMORY_QUERY_SYSCTL_MIB], ["${memory_mib}"],
+ [Define to the name of the sysctl MIB])
+])
+
+
+dnl Detects the availability of the sysctlbyname(3) function.
+dnl
+dnl \param action_if_found Code to run if the function is found.
+dnl \param action_if_not_found Code to run if the function is not found.
+AC_DEFUN([_KYUA_SYSCTLBYNAME], [
+ AC_CHECK_HEADERS([sys/types.h sys/sysctl.h]) dnl Darwin 11.2
+ AC_CHECK_HEADERS([sys/param.h sys/sysctl.h]) dnl NetBSD 6.0
+
+ AC_CHECK_FUNCS([sysctlbyname], [$1], [$2])
+])
+
+
+dnl Looks for a specific sysctl MIB.
+dnl
+dnl \pre sysctlbyname(3) must be present in the system.
+dnl
+dnl \param mib_name The name of the MIB to check for.
+dnl \param flat_mib_name The name of the MIB as a shell variable, for use in
+dnl cache variable names. This should be automatically computed with
+dnl m4_bpatsubst or similar, but my inability to make the code readable
+dnl made me add this parameter instead.
+dnl \param action_if_found Code to run if the MIB is found.
+dnl \param action_if_not_found Code to run if the MIB is not found.
+AC_DEFUN([_KYUA_SYSCTL_MIB], [
+ AC_CACHE_CHECK(
+ [if the $1 sysctl MIB exists],
+ [kyua_cv_sysctl_$2], [
+ AC_RUN_IFELSE([AC_LANG_PROGRAM([
+#if defined(HAVE_SYS_TYPES_H)
+# include <sys/types.h>
+#endif
+#if defined(HAVE_SYS_PARAM_H)
+# include <sys/param.h>
+#endif
+#if defined(HAVE_SYS_SYSCTL_H)
+# include <sys/sysctl.h>
+#endif
+#include <stdint.h>
+#include <stdlib.h>
+], [
+ int64_t memory;
+ size_t memory_length = sizeof(memory);
+ if (sysctlbyname("$1", &memory, &memory_length, NULL, 0) == -1)
+ return EXIT_FAILURE;
+ else
+ return EXIT_SUCCESS;
+])],
+ [kyua_cv_sysctl_$2=yes],
+ [kyua_cv_sysctl_$2=no])
+ ])
+ if test "${kyua_cv_sysctl_$2}" = yes; then
+ m4_default([$3], [:])
+ else
+ m4_default([$4], [:])
+ fi
+])