usbloadergx/source/ramdisk/ramdisk.h
2010-09-24 00:48:03 +00:00

82 lines
2.3 KiB
C

#ifndef __RAMDISK_H
#define __RAMDISK_H
#ifdef __cplusplus
extern "C"
{
#endif
/*
ramdiskCreate initialize a dynamic RAM-disk.
return: Handle for ramdiskMount
*/
void* ramdiskCreate();
/**************************************************
* ramdiskDelete
*
* destroy all datas
* if the ramdisk is allready mounted forces ramdiskUnmount
* IN: a Handle was created witch ramdiskCreate();
**************************************************/
void ramdiskDelete(void* Handle);
/**************************************************
* ramdiskMount
*
* mounts a ramdisk
* IN: mountpoint e.g. "RAM" or "MEM:"
* handle is a Handle was created ramdiskCreate()
* or NULL for auto-create
* OUT: 0 = Error / !0 = OK
**************************************************/
int ramdiskMount(const char *mountpoint, void *handle);
/**************************************************
* ramdiskUnmount
*
* unmounts a ramdisk
* IN: mountpoint e.g "RAM" or "MEM:"
**************************************************/
void ramdiskUnmount(const char *mountpoint);
/*
NOTE:
if the ramdisk not explizit created with ramdiskCreate (e.g ramdiskMount("RAMDISK:", NULL))
the ramdisk is implizit created. When unmount this "auto-created" ramdisk the ramdisk automitic deleted
but if the ramdisk explizit created (with ramdiskCreate),
then we can remount the filesystem without lost all datas.
Example1:
=========
void *ram = ramdiskCreate(); // create ramdisk
ramdiskMount("RAM", ram); // mount the ramdisk
...
fopen("RAM:/file", ...);
...
ramdiskMount("MEM", ram); // remount as MEM: (without lost of data)
...
fopen("RAM:/file", ...);
...
ramdiskUnmount("MEM"); // unmount
...
ramdiskMount("RAM", ram); // remount as RAM: (without lost of data)
...
ramdiskDelete(ram); // unmount and delete
Example2:
=========
ramdiskMount("RAM", NULL); // create and mount the ramdisk
...
fopen("RAM:/file", ...);
...
ramdiskUnmount("RAM"); // unmount and delete
*/
#ifdef __cplusplus
}
#endif
#endif /*__RAMDISK_H*/