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pthread_barrier_wait (3)
  • pthread_barrier_wait (3) ( Solaris man: Библиотечные вызовы )
  • >> pthread_barrier_wait (3) ( FreeBSD man: Библиотечные вызовы )
  • pthread_barrier_wait (3) ( POSIX man: Библиотечные вызовы )

  • BSD mandoc
     

    NAME

    
    
    pthread_barrier_destroy , pthread_barrier_init , pthread_barrier_wait
    
     - destroy, initialize or wait on a barrier object
    
     
    

    LIBRARY

    Lb libpthread
    
     
    

    SYNOPSIS

       #include <pthread.h>
    int pthread_barrier_destroy (pthread_barrier_t *barrier);
    int pthread_barrier_init (pthread_barrier_t *barrier const pthread_barrierattr_t *attr unsigned count);
    int pthread_barrier_wait (pthread_barrier_t *barrier);
     

    DESCRIPTION

    The pthread_barrier_init ();
    function will initialize Fa barrier with attributes specified in Fa attr , or if it is NULL with default attributes. The number of threads that must call pthread_barrier_wait ();
    before any of the waiting threads can be released is specified by Fa count . The pthread_barrier_destroy ();
    function will destroy Fa barrier and release any resources that may have been allocated on its behalf.

    The pthread_barrier_wait ();
    function will synchronize calling threads at Fa barrier . The threads will be blocked from making further progress until a sufficient number of threads calls this function. The number of threads that must call it before any of them will be released is determined by the Fa count argument to pthread_barrier_init (.);
    Once the threads have been released the barrier will be reset.  

    IMPLEMENTATION NOTES

       #include <both>
    Lb libkse and Lb libthr the PTHREAD_BARRIER_SERIAL_THREAD return value will always be returned by the last thread to reach the barrier.  

    RETURN VALUES

    If successful, both pthread_barrier_destroy ();
    and pthread_barrier_init ();
    will return zero. Otherwise, an error number will be returned to indicate the error. If the call to pthread_barrier_wait ();
    is successful, all but one of the threads will return zero. That one thread will return PTHREAD_BARRIER_SERIAL_THREAD Otherwise, an error number will be returned to indicate the error.

    None of these functions will return Er EINTR .  

    ERRORS

    The pthread_barrier_destroy ();
    function will fail if:

    Bq Er EBUSY
    An attempt was made to destroy Fa barrier while it was in use.

    The pthread_barrier_destroy ();
    and pthread_barrier_wait ();
    functions may fail if:

    Bq Er EINVAL
    The value specified by Fa barrier is invalid.

    The pthread_barrier_init ();
    function will fail if:

    Bq Er EAGAIN
    The system lacks resources, other than memory, to initialize Fa barrier .
    Bq Er EINVAL
    The Fa count argument is less than 1.
    Bq Er ENOMEM
    Insufficient memory to initialize Fa barrier .

     

    SEE ALSO

    pthread_barrierattr3  

    HISTORY

    The pthread_barrier_destroy (,);
    pthread_barrier_init ();
    and pthread_barrier_wait ();
    functions first appeared in Lb libkse in Fx 5.2 , and in Lb libthr in Fx 5.3 .


     

    Index

    NAME
    LIBRARY
    SYNOPSIS
    DESCRIPTION
    IMPLEMENTATION NOTES
    RETURN VALUES
    ERRORS
    SEE ALSO
    HISTORY


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