thr_keycreate Return Values

thr_keycreate() returns 0 if successful. When any of the following conditions is detected, thr_keycreate() fails and returns the corresponding value.

EAGAIN

Description:

The system does not have the resources to create another thread-specific data key, or the number of keys exceeds the per-process limit for PTHREAD_KEYS_MAX.

ENOMEM

Description:

Insufficient memory is available to associate value with keyp.