77 lines
1.2 KiB
C
Executable file
77 lines
1.2 KiB
C
Executable file
/*
|
|
* streamcache.c
|
|
* Managing a cache of open disks
|
|
*/
|
|
|
|
#include "sysincludes.h"
|
|
#include "msdos.h"
|
|
#include "mtools.h"
|
|
#include "vfat.h"
|
|
#include "fs.h"
|
|
#include "mainloop.h"
|
|
#include "plain_io.h"
|
|
#include "file.h"
|
|
|
|
static int is_initialized = 0;
|
|
static Stream_t *fss[256]; /* open drives */
|
|
|
|
static void finish_sc(void)
|
|
{
|
|
int i;
|
|
|
|
for(i=0; i<256; i++){
|
|
if(fss[i] && fss[i]->refs != 1 )
|
|
fprintf(stderr,"Streamcache allocation problem:%c %d\n",
|
|
i, fss[i]->refs);
|
|
FREE(&(fss[i]));
|
|
}
|
|
}
|
|
|
|
static void init_streamcache(void)
|
|
{
|
|
int i;
|
|
|
|
if(is_initialized)
|
|
return;
|
|
is_initialized = 1;
|
|
for(i=0; i<256; i++)
|
|
fss[i]=0;
|
|
atexit(finish_sc);
|
|
}
|
|
|
|
Stream_t *open_root_dir(char *drive, int flags)
|
|
{
|
|
Stream_t *Fs;
|
|
int i, k;
|
|
|
|
init_streamcache();
|
|
|
|
k = -1;
|
|
for(i=0; i<256; i++) {
|
|
if (fss[i] == NULL || strcmp(getDrive(fss[i]), drive) == 0) {
|
|
k = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(k == -1) {
|
|
fprintf(stderr, "Cannot initialize '%s:', out of table space\n",
|
|
drive);
|
|
return NULL;
|
|
}
|
|
|
|
/* open the drive */
|
|
if(fss[k])
|
|
Fs = fss[k];
|
|
else {
|
|
Fs = fs_init(drive, flags);
|
|
if (!Fs){
|
|
fprintf(stderr, "Cannot initialize '%s:'\n", drive);
|
|
return NULL;
|
|
}
|
|
|
|
fss[k] = Fs;
|
|
}
|
|
|
|
return OpenRoot(Fs);
|
|
}
|