Wonder Shine Blog

[OS] Thread - PThreads

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PThreads is Standard API for creating / synchronizing threads, made by POSIX. Each OS implements this API. PThreads includes:

pthread_create

int pthread_create(pthread_t thread,
                   const pthread_attr_t attr,
                   void (start_routine)(void ), void arg);

Creates thread

  • thread : unique thread ID
  • attr : thread attributes. default = NULL
  • start_routine : functions to be run on thread
  • arg : argument passed to start_routine


pthread_self

pthread_t pthread_self(void);

returns threads unique ID


pthread_join

int pthread_join(pthread_t th, void **thread_return);

Wait thread stop, get thread exit signal and cleanup resources.

  • th : thread ID to join
  • thread return : thread return value


pthread_detach

int pthread_detach(pthread_t th);

detaches thread from main thread using pthread_create. separated thread immediately cleanup resources on exit, not waiting for pthread_join.


pthread_exit

void pthread_exit(void *retval);

terminate current thread


pthread_mutex_init

int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutex_attr *attr);

inits thread mutex object

  • mutex : target mutex object
  • attr : mutex attributes (fast / recursive / error checking .. ). default = fast


pthread_mutex_lock

int pthread_mutex_lock(pthread_mutex_t *mutex);

for thread mutex lock


pthread_mutex_unlock

int pthread_mutex_unlock(pthread_mutex_t *mutex);


pthread_mutex_destroy

int pthread_mutex_destroy(pthread_mutex_t *mutex);


References