#include <threads.h>#include <pthread.h>inttss_create(tss_t *tss, tss_dtor_t dtor){/* Different error returns are possible. C glues them together into * just failure notification. Can't be optimized to a tail call, * unless thrd_error equals EAGAIN. */return__pthread_key_create(tss, dtor) ? thrd_error : thrd_success;}