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

  • BSD mandoc
     

    NAME

    
    
    pthread_spin_lock , pthread_spin_trylock , pthread_spin_unlock
    
     - lock or unlock a spin lock
    
     
    

    LIBRARY

    Lb libpthread
    
     
    

    SYNOPSIS

       #include <pthread.h>
    int pthread_spin_lock (pthread_spinlock_t *lock);
    int pthread_spin_trylock (pthread_spinlock_t *lock);
    int pthread_spin_unlock (pthread_spinlock_t *lock);
     

    DESCRIPTION

    The pthread_spin_lock ();
    function will acquire Fa lock if it is not currently owned by another thread. If the lock cannot be acquired immediately, it will spin attempting to acquire the lock (it will not sleep) until it becomes available.

    The pthread_spin_trylock ();
    function is the same as pthread_spin_lock ();
    except that if it cannot acquire Fa lock immediately it will return with an error.

    The pthread_spin_unlock ();
    function will release Fa lock , which must have been previously locked by a call to pthread_spin_lock ();
    or pthread_spin_trylock (.);
     

    RETURN VALUES

    If successful, all these functions will return zero. Otherwise, an error number will be returned to indicate the error.

    None of these functions will return Er EINTR .  

    ERRORS

    The pthread_spin_lock (,);
    pthread_spin_trylock ();
    and pthread_spin_unlock ();
    functions will fail if:

    Bq Er EINVAL
    The value specified by Fa lock is invalid or is not initialized.

    The pthread_spin_lock ();
    function may fail if:

    Bq Er EDEADLK
    The calling thread already owns the lock.

    The pthread_spin_trylock ();
    function will fail if:

    Bq Er EBUSY
    Another thread currently holds Fa lock .

    The pthread_spin_unlock ();
    function may fail if:

    Bq Er EPERM
    The calling thread does not own Fa lock .

     

    SEE ALSO

    pthread_spin_destroy3, pthread_spin_init3  

    HISTORY

    The pthread_spin_lock (,);
    pthread_spin_trylock ();
    and pthread_spin_unlock ();
    functions first appeared in Lb libkse in Fx 5.2 , and in Lb libthr in Fx 5.3 .  

    BUGS

    The implementation of pthread_spin_lock (,);
    pthread_spin_trylock ();
    and pthread_spin_unlock ();
    is expected to conform to St -p1003.2 .


     

    Index

    NAME
    LIBRARY
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    SEE ALSO
    HISTORY
    BUGS


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