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| author | Lasse Collin <lasse.collin@tukaani.org> | 2015-02-10 15:28:30 +0200 |
|---|---|---|
| committer | Lasse Collin <lasse.collin@tukaani.org> | 2015-02-10 15:28:30 +0200 |
| commit | d935b0cdf3db440269b9d952b2b281b18f8c7b08 (patch) | |
| tree | daaa0a7ee9b6a2b10248396cc1b15a535e084a43 /m4/tuklib_cpucores.m4 | |
| parent | xzdiff: Make the mktemp usage compatible with FreeBSD's mktemp. (diff) | |
| download | xz-d935b0cdf3db440269b9d952b2b281b18f8c7b08.tar.xz | |
tuklib_cpucores: Use cpuset_getaffinity() on FreeBSD if available.
In FreeBSD, cpuset_getaffinity() is the preferred way to get
the number of available cores.
Thanks to Rui Paulo for the patch. I edited it slightly, but
hopefully I didn't break anything.
Diffstat (limited to 'm4/tuklib_cpucores.m4')
| -rw-r--r-- | m4/tuklib_cpucores.m4 | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/m4/tuklib_cpucores.m4 b/m4/tuklib_cpucores.m4 index 64a6b43c..08e2cb0d 100644 --- a/m4/tuklib_cpucores.m4 +++ b/m4/tuklib_cpucores.m4 @@ -45,6 +45,22 @@ compile error #endif ]])], [tuklib_cv_cpucores_method=special], [ +# FreeBSD has both cpuset and sysctl. Look for cpuset first because +# it's a better approach. +AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ +#include <sys/param.h> +#include <sys/cpuset.h> + +int +main(void) +{ + cpuset_t set; + cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1, + sizeof(set), &set); + return 0; +} +]])], [tuklib_cv_cpucores_method=cpuset], [ + # Look for sysctl() solution first, because on OS/2, both sysconf() # and sysctl() pass the tests in this file, but only sysctl() # actually works. @@ -97,9 +113,14 @@ main(void) ]])], [tuklib_cv_cpucores_method=pstat_getdynamic], [ tuklib_cv_cpucores_method=unknown -])])])])]) +])])])])])]) case $tuklib_cv_cpucores_method in + cpuset) + AC_DEFINE([TUKLIB_CPUCORES_CPUSET], [1], + [Define to 1 if the number of available CPU cores + can be detected with cpuset(2).]) + ;; sysctl) AC_DEFINE([TUKLIB_CPUCORES_SYSCTL], [1], [Define to 1 if the number of available CPU cores |