| Constant | Description |
|---|---|
| _POSIX_THREADS | Base threads |
| _POSIX_THREAD_ATTR_STACKADDR | Stack address attribute. Not present in the IBM® i implementation. |
| _POSIX_THREAD_ATTR_STACKSIZE | Stack size attribute. Not present in the IBM i implementation. |
| _POSIX_THREAD_PRIORITY_SCHEDULING | Thread priority scheduling. Not present in the IBM i implementation. |
| _POSIX_THREAD_PRIO_INHERIT | Mutex priority inheritance. Not present in the IBM i implementation. |
| _POSIX_THREAD_PRIO_PROTECT | Mutex priority ceiling. Not present in the IBM i implementation. |
| _POSIX_THREAD_PROCESS_SHARED | Synchronization primitives may be shared between processes. |
The IBM i implementation of pthreads defines the _POSIX_THREADS and _POSIX_THREAD_PROCESS_SHARED feature test macros. See Unsupported preprocessor and feature test macros for a complete list of unsupported feature test macros.
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