mqueue.h File Reference

POSIX message queues (<mqueue.h>) More...

#include <time.h>
#include <signal.h>

Include dependency graph for mqueue.h:

Go to the source code of this file.

Data Structures
struct	mq_attr
	Message queue attributes used with mq_getattr() and mq_setattr(). More...

Typedefs
typedef void *	mqd_t
	Opaque message queue descriptor returned by mq_open().

Functions
mqd_t	mq_open (const char *name, int oflags,...)
	Open or create a message queue.
int	mq_close (mqd_t mqdes)
	Close a message queue descriptor.
int	mq_unlink (const char *name)
	Remove a named message queue.
int	mq_getattr (mqd_t mqdes, struct mq_attr *mqstat)
	Get the attributes of a message queue.
int	mq_receive (mqd_t mqdes, char *msg_ptr, size_t msg_len, unsigned int *msg_prio)
	Receive the oldest highest-priority message from a queue.
int	mq_send (mqd_t mqdes, const char *msg_ptr, size_t msg_len, unsigned int msg_prio)
	Add a message to a queue.
int	mq_setattr (mqd_t mqdes, const struct mq_attr *mqstat, struct mq_attr *omqstat)
	Set the attributes of a message queue.
int	mq_timedreceive (mqd_t mqdes, char *msg_ptr, size_t msg_len, unsigned int *msg_prio, const struct timespec *abstime)
	Receive a message from a queue with an absolute timeout.
int	mq_timedsend (mqd_t mqdes, const char *msg_ptr, size_t msg_len, unsigned int msg_prio, const struct timespec *abstime)
	Send a message to a queue with an absolute timeout.
int	mq_notify (mqd_t mqdes, const struct sigevent *notification)
	Register for notification when a message arrives on an empty queue.

Detailed Description

POSIX message queues (<mqueue.h>)

Provides the POSIX message queue API for inter-process (or inter-thread) communication via named, persistent, prioritised message queues.

See also

POSIX.1-2017 <mqueue.h>

Definition in file mqueue.h.