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msg.h File Reference

Messaging API for inter process communication. More...

Detailed Description

Messaging API for inter process communication.

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...


 Value of msg_t::sender_pid if the sender was an interrupt service routine.


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.