The Pthread types and functions have the following naming conventions. If the type of object is not a thread, object represents the type of object, action is an operation to be performed on the object, np or NP indicates that the name or symbol is a non-portable extension to the API set, and PURPOSE indicates the use or purpose of the symbol.
| Type | Description |
|---|---|
| pthread_attr_t | Thread creation attribute |
| pthread_cleanup_entry_np_t | Cancellation cleanup handler entry |
| pthread_condattr_t | Condition variable creation attribute |
| pthread_cond_t | Condition Variable synchronization primitive |
| pthread_joinoption_np_t | Options structure for extensions to pthread_join() |
| pthread_key_t | Thread local storage key |
| pthread_mutexattr_t | Mutex creation attribute |
| pthread_mutex_t | Mutex (Mutual exclusion) synchronization primitive |
| pthread_once_t | Once time initialization control variable |
| pthread_option_np_t | Pthread run-time options structure |
| pthread_rwlockattr_t | Read/Write lock attribute |
| pthread_rwlock_t | Read/Write synchronization primitive |
| pthread_t | Pthread handle |
| pthread_id_np_t | Thread ID. For use as an integral type. |
| struct sched_param | Scheduling parameters (priority and policy) |
After creating the primitive objects of type pthread_cond_t and pthread_mutex_t using the appropriate initialization functions, those objects must not be copied or moved to a new location. If the condition variable or mutex is copied or moved to a new location, the new primitive object is not valid or usable. Attempts to use the new object result in the EINVAL error.
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