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One-time execution(3) | globus_common | One-time execution(3) |
NAME¶
One-time execution -Data Structures¶
union globus_thread_once_t
Macros¶
#define GLOBUS_THREAD_ONCE_INIT { .none = 0 }
Functions¶
int globus_thread_once (globus_thread_once_t *once, void(*init_routine)(void))
Detailed Description¶
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. 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.
Author¶
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