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80 lines
1.7 KiB
80 lines
1.7 KiB
/* Copyright 1996,1997,2001,2002,2007,2009 Alain Knaff.
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* This file is part of mtools.
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*
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* Mtools is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Mtools 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 Mtools. If not, see <http://www.gnu.org/licenses/>.
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*
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* streamcache.c
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* Managing a cache of open disks
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*/
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#include "sysincludes.h"
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#include "msdos.h"
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#include "mtools.h"
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#include "vfat.h"
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#include "fs.h"
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#include "mainloop.h"
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#include "plain_io.h"
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#include "file.h"
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static int is_initialized = 0;
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static Stream_t *fss[256]; /* open drives */
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static void finish_sc(void)
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{
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int i;
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for(i=0; i<256; i++){
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if(fss[i] && fss[i]->refs != 1 )
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fprintf(stderr,"Streamcache allocation problem:%c %d\n",
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i, fss[i]->refs);
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FREE(&(fss[i]));
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}
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}
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static void init_streamcache(void)
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{
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int i;
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if(is_initialized)
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return;
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is_initialized = 1;
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for(i=0; i<256; i++)
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fss[i]=0;
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atexit(finish_sc);
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}
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Stream_t *open_root_dir(unsigned char drive, int flags, int *isRop)
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{
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Stream_t *Fs;
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init_streamcache();
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drive = toupper(drive);
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/* open the drive */
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if(fss[drive])
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Fs = fss[drive];
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else {
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Fs = fs_init(drive, flags, isRop);
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if (!Fs){
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fprintf(stderr, "Cannot initialize '%c:'\n", drive);
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return NULL;
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}
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fss[drive] = Fs;
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}
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return OpenRoot(Fs);
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}
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