pending.c

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/*
 * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 *
 * You can also choose to distribute this program under the terms of
 * the Unmodified Binary Distribution Licence (as given in the file
 * COPYING.UBDL), provided that you have satisfied its requirements.
 */

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );

#include <errno.h>
#include <ipxe/process.h>
#include <ipxe/timer.h>
#include <ipxe/pending.h>

/** @file
 *
 * Pending operations
 *
 */

/** Total count of pending operations */
int pending_total;

/**
 * Mark an operation as pending
 *
 * @v pending           Pending operation
 */
void pending_get ( struct pending_operation *pending ) {

        pending->count++;
        pending_total++;
        DBGC ( pending, "PENDING %p incremented to %d (total %d)\n",
               pending, pending->count, pending_total );
}

/**
 * Mark an operation as no longer pending
 *
 * @v pending           Pending operation
 */
void pending_put ( struct pending_operation *pending ) {

        if ( pending->count ) {
                pending_total--;
                pending->count--;
                DBGC ( pending, "PENDING %p decremented to %d (total %d)\n",
                       pending, pending->count, pending_total );
        }
}