diff options
Diffstat (limited to 'sync.c')
| -rw-r--r-- | sync.c | 121 |
1 files changed, 121 insertions, 0 deletions
@@ -6,6 +6,125 @@ * synchronisation. */ +/* + * Code contributed by John E. Bossom <JEB>. + */ + +int +pthread_detach (pthread_t tid) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * This function detaches the given thread. + * + * PARAMETERS + * thread + * an instance of a pthread_t + * + * + * DESCRIPTION + * This function detaches the given thread. You may + * detach the main thread or to detach a joinable thread + * (You should have used pthread_attr_t to create the + * thread as detached!) + * NOTE: detached threads cannot be joined nor canceled; + * storage is freed immediately on termination. + * + * RESULTS + * 0 successfully detached the thread, + * EINVAL thread is not a joinable thread, + * ENOSPC a required resource has been exhausted, + * ESRCH no thread could be found for 'thread', + * + * ------------------------------------------------------ + */ +{ + int result; + + if (tid == NULL || + tid->detachState == PTHREAD_CREATE_DETACHED) + { + + result = EINVAL; + + } + else + { + result = 0; + tid->detachState = PTHREAD_CREATE_DETACHED; + } + + return (result); + +} /* pthread_detach */ + +int +pthread_join (pthread_t thread, void **value_ptr) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * This function waits for 'thread' to terminate and + * returns the thread's exit value if 'value_ptr' is not + * NULL. This also detaches the thread on successful + * completion. + * + * PARAMETERS + * sem + * pointer to an instance of sem_t + * + * + * DESCRIPTION + * This function waits for 'thread' to terminate and + * returns the thread's exit value if 'value_ptr' is not + * NULL. This also detaches the thread on successful + * completion. + * NOTE: detached threads cannot be joined or canceled + * + * RESULTS + * 0 'thread' has completed + * EINVAL thread is not a joinable thread, + * ESRCH no thread could be found with ID 'thread', + * EDEADLK attempt to join thread with self + * + * ------------------------------------------------------ + */ +{ + int result = 0; + pthread_t self; + + self = pthread_self (); + + if (pthread_equal (self, thread) == 0) + { + result = EDEADLK; + + } + else + { + DWORD stat; + + stat = WaitForSingleObject (thread->threadH, INFINITE); + + if (stat != WAIT_OBJECT_0 && + !GetExitCodeThread (thread->threadH, (LPDWORD) value_ptr)) + { + result = ESRCH; + } + else + { + threadDestroy (thread); + } + } + + return (result); + +} /* pthread_join */ + +/* </JEB> */ + + +#if 0 /* Pre Bossom */ + #include <errno.h> /* POSIX STANDARD: A thread may pass a value pointer to some data via @@ -186,3 +305,5 @@ pthread_detach(pthread_t thread) return ret; } + +#endif /* Pre Bossom */ |