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Source release for DOOM Classic for iOS version 2.1
This commit is contained in:
Travis Bradshaw
165
code/prboom/.svn/text-base/w_memcache.c.svn-base
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165
code/prboom/.svn/text-base/w_memcache.c.svn-base
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/* Emacs style mode select -*- C++ -*-
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*-----------------------------------------------------------------------------
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*
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*
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* PrBoom: a Doom port merged with LxDoom and LSDLDoom
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* based on BOOM, a modified and improved DOOM engine
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* Copyright (C) 1999 by
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* id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
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* Copyright (C) 1999-2001 by
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* Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
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* Copyright 2005, 2006 by
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* Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* DESCRIPTION:
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* Handles in-memory caching of WAD lumps
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*
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*-----------------------------------------------------------------------------
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*/
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// use config.h if autoconf made one -- josh
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "doomstat.h"
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#include "doomtype.h"
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#ifdef __GNUG__
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#pragma implementation "w_wad.h"
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#endif
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#include "w_wad.h"
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#include "z_zone.h"
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#include "lprintf.h"
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static struct {
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void *cache;
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#ifdef TIMEDIAG
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int locktic;
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#endif
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unsigned int locks;
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} *cachelump;
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#ifdef HEAPDUMP
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void W_PrintLump(FILE* fp, void* p) {
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int i;
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for (i=0; i<numlumps; i++)
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if (cachelump[i].cache == p) {
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fprintf(fp, " %8.8s %6u %2d %6d", lumpinfo[i].name,
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W_LumpLength(i), cachelump[i].locks, gametic - cachelump[i].locktic);
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return;
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}
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fprintf(fp, " not found");
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}
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#endif
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#ifdef TIMEDIAG
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static void W_ReportLocks(void)
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{
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int i;
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lprintf(LO_DEBUG, "W_ReportLocks:\nLump Size Locks Tics\n");
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for (i=0; i<numlumps; i++) {
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if (cachelump[i].locks)
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lprintf(LO_DEBUG, "%8.8s %6u %2d %6d\n", lumpinfo[i].name,
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W_LumpLength(i), cachelump[i].locks, gametic - cachelump[i].locktic);
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}
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}
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#endif
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/* W_InitCache
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*
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* cph 2001/07/07 - split from W_Init
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*/
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void W_InitCache(void)
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{
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// set up caching
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cachelump = calloc(sizeof *cachelump, numlumps);
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if (!cachelump)
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I_Error ("W_Init: Couldn't allocate lumpcache");
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#ifdef TIMEDIAG
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atexit(W_ReportLocks);
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#endif
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}
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void W_DoneCache(void)
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{
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}
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/* W_CacheLumpNum
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* killough 4/25/98: simplified
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* CPhipps - modified for new lump locking scheme
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* returns a const*
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*/
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const void *W_CacheLumpNum(int lump)
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{
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const int locks = 1;
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#ifdef RANGECHECK
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if ((unsigned)lump >= (unsigned)numlumps)
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I_Error ("W_CacheLumpNum: %i >= numlumps",lump);
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#endif
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if (!cachelump[lump].cache) // read the lump in
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W_ReadLump(lump, Z_Malloc(W_LumpLength(lump), PU_CACHE, &cachelump[lump].cache));
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/* cph - if wasn't locked but now is, tell z_zone to hold it */
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if (!cachelump[lump].locks && locks) {
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Z_ChangeTag(cachelump[lump].cache,PU_STATIC);
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#ifdef TIMEDIAG
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cachelump[lump].locktic = gametic;
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#endif
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}
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cachelump[lump].locks += locks;
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#ifdef SIMPLECHECKS
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if (!((cachelump[lump].locks+1) & 0xf))
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lprintf(LO_DEBUG, "W_CacheLumpNum: High lock on %8s (%d)\n",
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lumpinfo[lump].name, cachelump[lump].locks);
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#endif
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return cachelump[lump].cache;
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}
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const void *W_LockLumpNum(int lump)
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{
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return W_CacheLumpNum(lump);
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}
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/*
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* W_UnlockLumpNum
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*
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* CPhipps - this changes (should reduce) the number of locks on a lump
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*/
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void W_UnlockLumpNum(int lump)
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{
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const int unlocks = 1;
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#ifdef SIMPLECHECKS
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if ((signed short)cachelump[lump].locks < unlocks)
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lprintf(LO_DEBUG, "W_UnlockLumpNum: Excess unlocks on %8s (%d-%d)\n",
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lumpinfo[lump].name, cachelump[lump].locks, unlocks);
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#endif
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cachelump[lump].locks -= unlocks;
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/* cph - Note: must only tell z_zone to make purgeable if currently locked,
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* else it might already have been purged
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*/
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if (unlocks && !cachelump[lump].locks)
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Z_ChangeTag(cachelump[lump].cache, PU_CACHE);
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}
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