github.com/afumu/libc@v0.0.6/musl/src/thread/tss_create.c (about)

     1  #include <threads.h>
     2  #include <pthread.h>
     3  
     4  int tss_create(tss_t *tss, tss_dtor_t dtor)
     5  {
     6  	/* Different error returns are possible. C glues them together into
     7  	 * just failure notification. Can't be optimized to a tail call,
     8  	 * unless thrd_error equals EAGAIN. */
     9  	return __pthread_key_create(tss, dtor) ? thrd_error : thrd_success;
    10  }