Messaging API for inter process communication. More...

Detailed Description

Messaging API for inter process communication.

Author: Kaspar Schleiser kaspa.nosp@m.r@sc.nosp@m.hleis.nosp@m.er.d.nosp@m.e; Kévin Roussel Kevin.nosp@m..Rou.nosp@m.ssel@.nosp@m.inri.nosp@m.a.fr

Definition in file msg.h.

#include <stdint.h>
#include <stdbool.h>
#include "sched.h"

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Data Structures
struct	msg_t
	Describes a message object which can be sent between threads. More...

Macros
#define	KERNEL_PID_ISR (KERNEL_PID_LAST + 1)
	Value of msg_t::sender_pid if the sender was an interrupt service routine.

#define	CONFIG_MSG_QUEUE_PRINT_MAX 16U
	Number of messages to be maximally printed through msg_queue_print.

Functions
int	msg_send (msg_t *m, kernel_pid_t target_pid)
	Send a message (blocking).

int	msg_try_send (msg_t *m, kernel_pid_t target_pid)
	Send a message (non-blocking).

int	msg_send_to_self (msg_t *m)
	Send a message to the current thread.

int	msg_send_int (msg_t *m, kernel_pid_t target_pid)
	Send message from interrupt.

static int	msg_sent_by_int (const msg_t *m)
	Test if the message was sent inside an ISR.

int	msg_receive (msg_t *m)
	Receive a message.

int	msg_try_receive (msg_t *m)
	Try to receive a message.

int	msg_send_receive (msg_t m, msg_t reply, kernel_pid_t target_pid)
	Send a message, block until reply received.

int	msg_reply (msg_t m, msg_t reply)
	Replies to a message.

int	msg_reply_int (msg_t m, msg_t reply)
	Replies to a message from interrupt.

unsigned	msg_avail_thread (kernel_pid_t pid)
	Check how many messages are available (waiting) in the message queue of a specific thread.

unsigned	msg_avail (void)
	Check how many messages are available (waiting) in the message queue.

unsigned	msg_queue_capacity (kernel_pid_t pid)
	Get maximum capacity of a thread's queue length.

void	msg_init_queue (msg_t *array, int num)
	Initialize the current thread's message queue.

void	msg_queue_print (void)
	Prints the message queue of the current thread.

Data Structures