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author | Rich Felker <dalias@aerifal.cx> | 2013-08-10 21:15:11 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2013-08-10 21:15:11 -0400 |
commit | eeb0328f203cfb8990b3eee5ee31d931fc539ceb (patch) | |
tree | 99558d1b944c1cf76f33faab7e294c72480a7328 /src/sched/sched_cpucount.c | |
parent | 76fbf6ad4bb2f697512a1541d296c1f749e3b504 (diff) | |
download | musl-eeb0328f203cfb8990b3eee5ee31d931fc539ceb.tar.gz musl-eeb0328f203cfb8990b3eee5ee31d931fc539ceb.tar.xz musl-eeb0328f203cfb8990b3eee5ee31d931fc539ceb.zip |
add cpu affinity interfaces
this first commit just includes the CPU_* and sched_* interfaces, not the pthread_* interfaces, which may be added later. simple sanity-check testing has been done for the basic interfaces, but most of the macros have not yet been tested.
Diffstat (limited to 'src/sched/sched_cpucount.c')
-rw-r--r-- | src/sched/sched_cpucount.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/sched/sched_cpucount.c b/src/sched/sched_cpucount.c new file mode 100644 index 00000000..94aa259e --- /dev/null +++ b/src/sched/sched_cpucount.c @@ -0,0 +1,11 @@ +#define _GNU_SOURCE +#include <sched.h> + +int __sched_cpucount(size_t size, const cpu_set_t *set) +{ + size_t i, j, cnt=0; + const unsigned char *p = (const void *)set; + for (i=0; i<size; i++) for (j=0; j<8; j++) + if (p[i] & (1<<j)) cnt++; + return cnt; +} |