nsz Git - musl/blob - src/thread/pthread_setspecific.c

   1 #include "pthread_impl.h"
   2
   3 int pthread_setspecific(pthread_key_t k, const void *x)
   4 {
   5         struct pthread *self = pthread_self();
   6         /* Handle the case of the main thread */
   7         if (!self->tsd) {
   8                 if (!x) return 0;
   9                 if (!(self->tsd = calloc(sizeof(void *), PTHREAD_KEYS_MAX)))
  10                         return ENOMEM;
  11         }
  12         /* Avoid unnecessary COW */
  13         if (self->tsd[k] != x) {
  14                 self->tsd[k] = (void *)x;
  15                 self->tsd_used = 1;
  16         }
  17         return 0;
  18 }