mirror of
https://github.com/libretro/scummvm.git
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158 lines
3.9 KiB
C++
158 lines
3.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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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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* aint32 with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*
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* Based on the original sources
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* Faery Tale II -- The Halls of the Dead
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* (c) 1993-1996 The Wyrmkeep Entertainment Co.
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*/
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#ifndef SAGA2_ONCALL_H
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#define SAGA2_ONCALL_H
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#include "saga2/bitarray.h"
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#include "saga2/rmem.h"
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#include "saga2/localize.h"
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namespace Saga2 {
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#define isValidPtr(p) ((p!=NULL)&&(p!=(void *)0xCDCDCDCD))
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template <class RESTYPE> class LoadOnCall {
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BitArray wanted;
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BitArray locked;
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BitArray recent;
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RESTYPE *handle;
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uint16 handles;
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uint32 tileID;
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RHANDLE(*loader)(hResID, bool);
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RESTYPE rLoad(uint16 ind, bool asynch);
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void rFree(uint16);
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void rInit(uint16);
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public:
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LoadOnCall(uint16 newSize, RHANDLE(*loadfunction)(hResID, bool), uint32 newID) {
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tileID = newID;
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wanted.resize(newSize);
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locked.resize(newSize);
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recent.resize(newSize);
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handle = (RESTYPE *) TALLOC(sizeof(RESTYPE) * newSize, memPrgResMan);
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handles = newSize;
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loader = loadfunction;
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for (uint16 i = 0; i < newSize; i++)
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rInit(i);
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}
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// destructor
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~LoadOnCall() {
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//if (handles) delete[] handle;
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}
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RESTYPE operator[](uint32 ind) {
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// ASSERT (ind<handles);
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if (!locked[ind]) handle[ind] = rLoad(ind, FALSE);
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return handle[ind];
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}
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void flush(void) {
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//recent.clearAll();
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for (uint16 i = 0; i < handles; i++)
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if ((locked[i]) && (!recent[i]))
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rFree(i);
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//locked|=recent;
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recent.clearAll();
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}
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BitArray lockState(void) {
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return locked;
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}
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BitArray wantState(void) {
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return wanted;
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}
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};
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template <class RESTYPE> RESTYPE LoadOnCall<RESTYPE>::rLoad(uint16 ind, bool asynch) {
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RESTYPE t;
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if (isValidPtr(handle[ ind ]) && locked[ind]) {
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RLockHandle((RHANDLE) handle[ ind ]);
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locked.Bit(ind, TRUE);
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wanted.Bit(ind, FALSE);
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recent.Bit(ind, TRUE);
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return handle[ ind ];
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}
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if (isValidPtr(handle[ ind ]) && wanted[ind]) {
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// wait for handle
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RLockHandle((RHANDLE) handle[ ind ]);
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locked.Bit(ind, TRUE);
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wanted.Bit(ind, FALSE);
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recent.Bit(ind, TRUE);
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return NULL;
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}
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//t = (RESTYPE) tileRes->load( tileID + RES_ID( 0,0,0,bankNum ) );
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t = (RESTYPE) loader(tileID + RES_ID(0, 0, 0, ind), asynch);
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locked.Bit(ind, !asynch);
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wanted.Bit(ind, asynch);
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recent.Bit(ind, TRUE);
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if (asynch) {
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handle[ ind ] = (RESTYPE) NULL;
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} else {
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if (t == NULL) {
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error("Resource %d could not load (Tile bank)", ind);
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}
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handle[ ind ] = t;
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}
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return t;
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}
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template <class RESTYPE> void LoadOnCall<RESTYPE>::rFree(uint16 ind) {
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if (isValidPtr(handle[ ind ])) {
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RUnlockHandle((RHANDLE) handle[ ind ]);
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locked.Bit(ind, FALSE);
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//recent.Bit(ind,FALSE);
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// washHandle(handle[ind]);
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}
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}
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template <class RESTYPE> void LoadOnCall<RESTYPE>::rInit(uint16 ind) {
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RESTYPE t;
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if (!isValidPtr(handle[ ind ])) {
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t = (RESTYPE) loader(tileID + RES_ID(0, 0, 0, ind), FALSE);
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handle[ ind ] = t;
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locked.Bit(ind, TRUE);
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RUnlockHandle((RHANDLE) handle[ ind ]);
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locked.Bit(ind, FALSE);
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recent.Bit(ind, FALSE);
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}
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}
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//typedef LoadOnCall<TileBankHandle> tileBankArray; //(64,tileResLoad);
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} // end of namespace Saga2
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#endif
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