diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/pthread_setaffinity.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/pthread_setaffinity.c | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/sysdeps/unix/sysv/linux/pthread_setaffinity.c b/sysdeps/unix/sysv/linux/pthread_setaffinity.c index e891818..2ebf09d 100644 --- a/sysdeps/unix/sysv/linux/pthread_setaffinity.c +++ b/sysdeps/unix/sysv/linux/pthread_setaffinity.c @@ -23,62 +23,14 @@ #include <shlib-compat.h> -size_t __kernel_cpumask_size attribute_hidden; - - -/* Determine the size of cpumask_t in the kernel. */ -int -__determine_cpumask_size (pid_t tid) -{ - size_t psize; - int res; - - for (psize = 128; ; psize *= 2) - { - char buf[psize]; - INTERNAL_SYSCALL_DECL (err); - - res = INTERNAL_SYSCALL (sched_getaffinity, err, 3, tid, psize, buf); - if (INTERNAL_SYSCALL_ERROR_P (res, err)) - { - if (INTERNAL_SYSCALL_ERRNO (res, err) != EINVAL) - return INTERNAL_SYSCALL_ERRNO (res, err); - } - else - break; - } - - if (res != 0) - __kernel_cpumask_size = res; - - return 0; -} - - int __pthread_setaffinity_new (pthread_t th, size_t cpusetsize, const cpu_set_t *cpuset) { const struct pthread *pd = (const struct pthread *) th; - INTERNAL_SYSCALL_DECL (err); int res; - if (__glibc_unlikely (__kernel_cpumask_size == 0)) - { - res = __determine_cpumask_size (pd->tid); - if (res != 0) - return res; - } - - /* We now know the size of the kernel cpumask_t. Make sure the user - does not request to set a bit beyond that. */ - for (size_t cnt = __kernel_cpumask_size; cnt < cpusetsize; ++cnt) - if (((char *) cpuset)[cnt] != '\0') - /* Found a nonzero byte. This means the user request cannot be - fulfilled. */ - return EINVAL; - res = INTERNAL_SYSCALL (sched_setaffinity, err, 3, pd->tid, cpusetsize, cpuset); |