third_party/ulib/musl/pthread/pthread_setspecific.c

#include "pthread_impl.h"

int pthread_setspecific(pthread_key_t k, const void* x) {
    struct pthread* self = __pthread_self();
    /* Avoid unnecessary COW */
    if (self->tsd[k] != x) {
        self->tsd[k] = (void*)x;
        self->tsd_used = 1;
    }
    return 0;
}