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       globus_thread_once - One-time execution.


   Data Structures
       union globus_thread_once_t
           Thread once structure.

       #define GLOBUS_THREAD_ONCE_INIT   { .none = 0 }
           Thread once initializer value.

       int globus_thread_once (globus_thread_once_t *once, void(*init_routine)(void))
           Execute a function one time.

Detailed Description

       One-time execution.

       The globus_thread_once_t provides a way for applications and libraries to execute some
       code exactly one time, independent of the number of threads which attempt to execute it.
       To use this, statically initialize a globus_thread_once_t control with the value
       GLOBUS_THREAD_ONCE_INIT, and pass a pointer to a function to execute once, along with the
       control, to globus_thread_once().

Function Documentation

   int globus_thread_once (globus_thread_once_t * once, void(*)(void) init_routine)
       Execute a function one time. The globus_thread_once() function will execute the function
       pointed to by its init_routine parameter one time for each unique globus_thread_once_t
       object passed to it, independent of the number of threads calling it. The once value must
       be a static value initialized to GLOBUS_THREAD_ONCE_INIT.

           once A pointer to the value used to govern whether the function passed via the
           init_routine parameter has executed.
           init_routine Function to execute one time. It is called with no parameters.

           On success, globus_thread_once() guarantees that the function pointed to by
           init_routine has run, and that subsequent calls to globus_thread_once() with the same
           value of once will not execute that function, and returns GLOBUS_SUCCESS. If an error
           occurs, globus_thread_once() returns an implementation-specific non-zero error value.


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