pSOSystem System Calls - Read

pSOS+ System Calls sm_av
sm_av (pSOS+m kernel only) Asynchronously releases a semaphore token.
#include
unsigned long sm_av(
unsigned long smid /* semaphore identifier */
)
Description
Arguments
Return Value
Error Codes
This system call is used to asynchronously release a semaphore token. It is identical
to sm_v() except the call is made asynchronously. Refer to the description of
sm_v() for further information. This call is only supported by the pSOS+m kernel
(the multiprocessor version).
smid Specifies the semaphore ID of the semaphore token to release.
When called in a system running the pSOS+m kernel, this call always returns 0.
The pSOS+ kernel (the single processor version) returns ERR_SSFN.
If the sm_v() call fails and the node’s MC_ASYNCERR routine is present, that routine
is invoked. The following error codes are possible:
Hex Mnemonic Description
0x05 ERR_OBJDEL Semaphore has been deleted.
0x06 ERR_OBJID smid incorrect; failed validity check.
0x07 ERR_OBJTYPE Object type doesn’t match object ID;
failed validity check.
If an MC_ASYNCERR routine is not provided, the pSOS+m kernel generates a fatal
error.
pSOSystem System Calls 1-119
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