ACPI_STATUS AcpiExReleaseMutexObject ( ACPI_OPERAND_OBJECT * ObjDesc )

Definition at line 405 of file exmutex.c.

Referenced by AcpiExReleaseGlobalLock(), AcpiExReleaseMutex(), and AcpiReleaseGlobalLock().

{
    ACPI_STATUS             Status = AE_OK;


    ACPI_FUNCTION_TRACE (ExReleaseMutexObject);


    if (ObjDesc->Mutex.AcquisitionDepth == 0)
    {
        return (AE_NOT_ACQUIRED);
    }

    /* Match multiple Acquires with multiple Releases */

    ObjDesc->Mutex.AcquisitionDepth--;
    if (ObjDesc->Mutex.AcquisitionDepth != 0)
    {
        /* Just decrement the depth and return */

        return_ACPI_STATUS (AE_OK);
    }

    if (ObjDesc->Mutex.OwnerThread)
    {
        /* Unlink the mutex from the owner's list */

        AcpiExUnlinkMutex (ObjDesc);
        ObjDesc->Mutex.OwnerThread = NULL;
    }

    /* Release the mutex, special case for Global Lock */

    if (ObjDesc == AcpiGbl_GlobalLockMutex)
    {
        Status = AcpiEvReleaseGlobalLock ();
    }
    else
    {
        AcpiOsReleaseMutex (ObjDesc->Mutex.OsMutex);
    }

    /* Clear mutex info */

    ObjDesc->Mutex.ThreadId = 0;
    return_ACPI_STATUS (Status);
}

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