Comtrol eCos - Manual (Page 395)

Chapter 18. Device Driver Interface to the Kernel
Arguments:
lock - pointer to spinlock to clear
Result:
None
Level:
ISR
Description:
Clear a spinlock. This clears the spinlock and allows another CPU to claim it. If there is more than one CPU
waiting in cyg_drv_spinlock_spin() then just one of them will be allowed to proceed.
cyg_drv_spinlock_try
Function:
cyg_bool_t cyg_drv_spinlock_try(cyg_spinlock_t *lock )
Arguments:
lock - pointer to spinlock to try
Result:
TRUE if the spinlock was claimed, FALSE otherwise.
Level:
ISR
Description:
Try to claim the spinlock without waiting. If the spinlock could be claimed immediately then TRUE is returned.
If the spinlock is already claimed then the result is FALSE .
cyg_drv_spinlock_test
Function:
cyg_bool_t cyg_drv_spinlock_test(cyg_spinlock_t *lock )
Arguments:
lock - pointer to spinlock to test
Result:
TRUE if the spinlock is available, FALSE otherwise.
291