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is a pointer to a variable used to hold an error code.
OS_ERR_NONE
if a signal is received.
OS_ERR_PEND_ABORT
if the pend was aborted because another task called OSTaskSemPendAbort().
OS_ERR_PEND_ISR
if OS_CFG_CALLED_FROM_ISR_CHK_EN set to 1 in os_cfg.h: if calling this function from an ISR.
OS_ERR_PEND_WOULD_BLOCK
if calling this function with the opt argument set to OS_OPT_PEND_NON_BLOCKING, and no signal was received.
OS_ERR_SCHED_LOCKED
if calling this function when the scheduler is locked and the user wanted the task to block.
OS_ERR_TIMEOUT
if a signal is not received within the specified timeout.
Returned Value
The current value of the signal counter after it has been decremented. In other words, the number of signals still remaining in the signal counter.
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