iPXE
pending.c
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00001 /*
00002  * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License as
00006  * published by the Free Software Foundation; either version 2 of the
00007  * License, or any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful, but
00010  * WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software
00016  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00017  * 02110-1301, USA.
00018  *
00019  * You can also choose to distribute this program under the terms of
00020  * the Unmodified Binary Distribution Licence (as given in the file
00021  * COPYING.UBDL), provided that you have satisfied its requirements.
00022  */
00023 
00024 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
00025 
00026 #include <errno.h>
00027 #include <ipxe/process.h>
00028 #include <ipxe/timer.h>
00029 #include <ipxe/pending.h>
00030 
00031 /** @file
00032  *
00033  * Pending operations
00034  *
00035  */
00036 
00037 /** Total count of pending operations */
00038 int pending_total;
00039 
00040 /**
00041  * Mark an operation as pending
00042  *
00043  * @v pending           Pending operation
00044  */
00045 void pending_get ( struct pending_operation *pending ) {
00046 
00047         pending->count++;
00048         pending_total++;
00049         DBGC ( pending, "PENDING %p incremented to %d (total %d)\n",
00050                pending, pending->count, pending_total );
00051 }
00052 
00053 /**
00054  * Mark an operation as no longer pending
00055  *
00056  * @v pending           Pending operation
00057  */
00058 void pending_put ( struct pending_operation *pending ) {
00059 
00060         if ( pending->count ) {
00061                 pending_total--;
00062                 pending->count--;
00063                 DBGC ( pending, "PENDING %p decremented to %d (total %d)\n",
00064                        pending, pending->count, pending_total );
00065         }
00066 }