Comtrol eCos - Manual (Page 400)

Chapter 18. Device Driver Interface to the Kernel
Description:
Attempt to lock the mutex pointed to by the mutex argument without waiting. If the mutex is already locked
by some other thread then this function returns FALSE . If the function can lock the mutex without waiting,
then TRUE is returned.
cyg_drv_mutex_unlock
Function:
void cyg_drv_mutex_unlock( cyg_drv_mutex *mutex )
Arguments:
mutex - pointer to mutex to unlock
Result:
None
Level:
Thread
Description:
Unlock the mutex pointed to by the mutex argument. If there are any threads waiting to claim the lock, one
of them is woken up to try and claim it.
cyg_drv_mutex_release
Function:
void cyg_drv_mutex_release( cyg_drv_mutex *mutex )
Arguments:
mutex - pointer to mutex to release
Result:
None
Level:
Thread
Description:
Release all threads waiting on the mutex pointed to by the mutex argument. These threads will return from
cyg_drv_mutex_lock() with a FALSE result and will not have claimed the mutex. This function has no
effect on any thread that may have the mutex claimed.
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