Sets the value of the thread-specific storage identified by tss_id for the current thread to val. Different threads may set different values to the same key.
The destructor, if available, is not invoked.
[edit] Parameters tss_id - thread-specific storage key, obtained from tss_create and not deleted by tss_delete val - value to set thread-specific storage to [edit] Return valuethrd_success if successful, thrd_error otherwise.
[edit] NotesThe POSIX equivalent of this function is pthread_setspecific.
Typically TSS is used to store pointers to blocks of dynamically allocated memory that have been reserved for use by the calling thread.
tss_set may be called in the TSS destructor. If the destructor exits with non-NULL value in the TSS storage, it will be retried by thrd_exit up to TSS_DTOR_ITERATIONS times, after which the storage will be lost.
int thread_func(void *arg) {
tss_t key;
if (thrd_success == tss_create(&key, free)) {
tss_set(key, malloc(4)); // stores a pointer on TSS
// ...
}
} // calls free() for the pointer stored on TSS[edit] References
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