Purpose

This function allows an FSD to clear the I/O event semaphore that is a part of the Extended Strategy request packet.

Calling Sequence

int far pascal FSH_IOSEMCLEAR(pSem)

Where

pSem is the handle to the I/O event semaphore.

Returns

If no error is detected, a zero error code is returned. If an error is detected, one of the following error codes is returned:

• ERROR_EXCL_ALREADY_OWNED – the exclusive semaphore is already owned.
• ERROR_PROTECTION_VIOLATION – the semaphore is inaccessible.

Remarks

FSH_IOSEMCLEAR may block.

For a detailed description of the Extended Strategy request interface, please see the OS/2 Version 2.0 Physical Device Driver Reference

Note: OS/2 does not validate input parameters. An FSD, therefore, should call FSH_PROBEBUF where appropriate.