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Merge branch 'cherry-pick-cc25486b' into 'glib-2-80'

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Backport !3979 "Use CPU_COUNT to get the number of set CPUs" to glib-2-80

See merge request GNOME/glib!3981
This commit is contained in:
Philip Withnall 2024-03-25 15:05:24 +00:00
commit ababf2aa7e
1 changed files with 1 additions and 3 deletions
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glib/gthread.c
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@ -1092,7 +1092,6 @@ g_get_num_processors (void)
return count;
#elif defined(_SC_NPROCESSORS_ONLN) && defined(THREADS_POSIX) && defined(HAVE_PTHREAD_GETAFFINITY_NP)
{
int idx;
int ncores = MIN (sysconf (_SC_NPROCESSORS_ONLN), CPU_SETSIZE);
cpu_set_t cpu_mask;
CPU_ZERO (&cpu_mask);
@ -1100,8 +1099,7 @@ g_get_num_processors (void)
int af_count = 0;
int err = pthread_getaffinity_np (pthread_self (), sizeof (cpu_mask), &cpu_mask);
if (!err)
for (idx = 0; idx < ncores && idx < CPU_SETSIZE; ++idx)
af_count += CPU_ISSET (idx, &cpu_mask);
af_count = CPU_COUNT (&cpu_mask);
int count = (af_count > 0) ? af_count : ncores;
return count;