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().
◆ globus_thread_once()
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.
- Parameters
-
| 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. |
- Returns
- 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.
