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rtapi_mutex − Mutex-related functions |
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int rtapi_mutex_try(unsigned long *mutex) |
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void rtapi_mutex_get(unsigned long *mutex) |
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void rtapi_mutex_give(unsigned long *mutex) |
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mutex |
A pointer to the mutex. |
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rtapi_mutex_try makes a non-blocking attempt to get the mutex. If the mutex is available, it returns 0, and the mutex is no longer available. Otherwise, it returns a nonzero value. rtapi_mutex_get blocks until the mutex is available. rtapi_mutex_give releases a mutex acquired by rtapi_mutex_try or rtapi_mutex_get. |
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rtapi_mutex_give and rtapi_mutex_try may be used from user, init/cleanup, and realtime code. rtapi_mutex_get may not be used from realtime code. |
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rtapi_mutex_try returns 0 for if the mutex was claimed, and nonzero otherwise. rtapi_mutex_get and rtapi_mutex_gif have no return value. |