78 lines
1.2 KiB
C
78 lines
1.2 KiB
C
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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(char *drive, int flags)
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{
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Stream_t *Fs;
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int i, k;
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init_streamcache();
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k = -1;
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for(i=0; i<256; i++) {
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if (fss[i] == NULL || strcmp(getDrive(fss[i]), drive) == 0) {
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k = i;
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break;
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}
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}
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if(k == -1) {
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fprintf(stderr, "Cannot initialize '%s:', out of table space\n",
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drive);
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return NULL;
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}
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/* open the drive */
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if(fss[k])
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Fs = fss[k];
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else {
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Fs = fs_init(drive, flags);
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if (!Fs){
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fprintf(stderr, "Cannot initialize '%s:'\n", drive);
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return NULL;
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}
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fss[k] = Fs;
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}
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return OpenRoot(Fs);
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}
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