Rd

Files
file	rd.c
	Initial RAM disk for HelenOS.
Defines
#define	NAME   "rd"
Functions
int	main (int argc, char **argv)
static void	rd_connection (ipc_callid_t iid, ipc_call_t *icall)
	Handle one connection to ramdisk.
static bool	rd_init (void)
	Prepare the ramdisk image for operation.
static int	rd_read_blocks (uint64_t ba, size_t cnt, void *buf)
	Read blocks from the device.
static int	rd_write_blocks (uint64_t ba, size_t cnt, const void *buf)
	Write blocks to the device.
Variables
static const size_t	block_size = 512
	Block size.
static void *	rd_addr
	Pointer to the ramdisk's image.
fibril_rwlock_t	rd_lock
	This rwlock protects the ramdisk's data.
static size_t	rd_size
	Size of the ramdisk.

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Function Documentation

static void rd_connection	(	ipc_callid_t	iid,
		ipc_call_t *	icall
	)			[static]

Handle one connection to ramdisk.

Parameters:

	iid	Hash of the request that opened the connection.
	icall	Call data of the request that opened the connection.

Definition at line 86 of file rd.c.

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Variable Documentation

fibril_rwlock_t rd_lock

This rwlock protects the ramdisk's data.

If we were to serve multiple requests (read + write or several writes) concurrently (i.e. from two or more threads), each read and write needs to be protected by this rwlock.

Definition at line 79 of file rd.c.

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