packet.c File Reference

DROPS Stream Interface. More...

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Defines
#define	DO_PACKET_NUMBERING   0
#define	set_socket_flag(s, f)
#define	reset_socket_flag(s, f)
Functions
static int	__is_valid_packet (dsi_socket_t *socket, dsi_packet_t *packet)
	Check if packet points to a valid packet descriptor of socket.
static int	__get_packet_index (dsi_socket_t *socket, dsi_packet_t *packet)
	Calculate packet index.
static int	__send_release_notification (dsi_socket_t *socket, dsi_packet_t *packet)
	Send release packet notification to send component.
static int	__get_sg_elem (dsi_socket_t *socket, int *sg_elem)
	Find unused scatter gather list element.
static int	__get_send_packet (dsi_socket_t *socket, int *packet)
	Try to lock next send packet in packet ring list.
static void	__map_receive_data (dsi_socket_t *socket, int packet_idx)
	Map packet data.
static void	__copy_receive_data (dsi_socket_t *socket, int packet_idx)
	Copy packet data.
static int	__get_receive_packet (dsi_socket_t *socket, int *packet)
	Try to lock next receive packet in packet ring list.
static int	__commit_send_packet (dsi_socket_t *socket, dsi_packet_t *packet)
	Commit send packet.
static int	__commit_receive_packet (dsi_socket_t *socket, dsi_packet_t *packet)
	Commit (release) received packet.
int	dsi_packet_get (dsi_socket_t *socket, dsi_packet_t **packet)
	Request next send/receive packet.
int	dsi_packet_get_abort (dsi_socket_t *socket)
	Abort an ongoing packet_get() in the work-thread.
int	dsi_packet_get_nr (dsi_socket_t *socket, unsigned nr, dsi_packet_t **packet)
	Wait for specific packet.
int	dsi_packet_commit (dsi_socket_t *socket, dsi_packet_t *packet)
	Commit send / release receive packet.
int	dsi_packet_add_data (dsi_socket_t *socket, dsi_packet_t *packet, void *addr, l4_size_t size, l4_uint32_t flags)
	Add data area to packet's scatter gather list.
int	dsi_packet_get_data (dsi_socket_t *socket, dsi_packet_t *packet, void **addr, l4_size_t *size)
	Get next data area from packet.
int	dsi_packet_set_no (dsi_socket_t *socket, dsi_packet_t *packet, l4_uint32_t no)
	Set packet number.
int	dsi_packet_get_no (dsi_socket_t *socket, dsi_packet_t *packet, l4_uint32_t *no)
	Get packet number.

---

Detailed Description

DROPS Stream Interface.

DSI packet handling.

Date:

07/01/2000

Author:

Lars Reuther <reuther@os.inf.tu-dresden.de>

Note:

To avoid the automatic packet numbering, set DO_PACKET_NUMBERING to 0. The packet number can be set using the dsi_packet_set_no function.

Definition in file packet.c.

---

Define Documentation

#define reset_socket_flag	(	s,
		f		)

Value:

__asm__ __volatile__ (          \
        "andl   %1,%0   \n\t"           \
        :                               \
        :"m" ((s)->flags), "g" (~f)     \
        :"memory"                       \
        )

Definition at line 68 of file packet.c.

#define set_socket_flag	(	s,
		f		)

Value:

__asm__ __volatile__ (          \
        "orl    %1,%0   \n\t"           \
        :                               \
        :"m" ((s)->flags), "g" (f)      \
        :"memory"                       \
        )

Definition at line 60 of file packet.c.

---

Function Documentation

static void __copy_receive_data	(	dsi_socket_t *	socket,
		int	packet_idx
	)			[inline, static]

Copy packet data.

Parameters:

	socket	Socket descriptor
	packet_idx	Packet index

Call send component to copy packet data.

Definition at line 350 of file packet.c.

References dsi_socket::data_area, dsi_socket::data_size, dsi_socket::remote_socket, and dsi_socket_ref::sync_th.

Referenced by __get_receive_packet().

static void __map_receive_data	(	dsi_socket_t *	socket,
		int	packet_idx
	)			[inline, static]

Map packet data.

Parameters:

	socket	Socket descriptor
	packet_idx	Packet index

Call send component to map packet data.

Definition at line 321 of file packet.c.

References dsi_socket::data_area, dsi_socket::data_map_size, dsi_socket::remote_socket, and dsi_socket_ref::sync_th.

Referenced by __get_receive_packet().