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LCK_pend, LCK_post Pairs

MattB
Expert 2025 points

Hi,

If LCK_pend times out should LCK_post be cleared?

In other words, should I write:

if (LCK_pend(&lock, 10))

{

    ...

    LCK_post(&lock);

}

or:

if (LCK_pend(&lock, 10))

{

    ...

}

LCK_post(&lock);

Thanks,

Matt

  • 0
    TI__Expert 4125 points

    The former. From the DSP/BIOS API Reference Guide (spru403):

    LCK_pend returns TRUE if it successfully acquires ownership of lock,
    returns FALSE if a timeout occurs before it can acquire ownership.
    LCK_pend returns FALSE if it is called from the context of a SWI or HWI,
    even if the timeout is zero.

    In other words, if LCK_pend returns FALSE, you do not "own" the lock, so you cannot "relinquish" ownership via LCK_post.

    Mark

  • 0 in reply to MarkGrosen
    Expert 2025 points

    Hi Mark,

    Yep, makes sense to me but just wanted to check!

    Thanks,

    Matt