Control block used to manage each message queue. More...

#include <coremsg.h>

Data Fields
Thread_queue_Control	Wait_queue

const Thread_queue_Operations *	operations
	The thread queue operations according to the blocking discipline.

uint32_t	maximum_pending_messages

uint32_t	number_of_pending_messages

size_t	maximum_message_size

Chain_Control	Pending_messages

CORE_message_queue_Buffer *	message_buffers

Chain_Control	Inactive_messages

Detailed Description

Control block used to manage each message queue.

The following defines the control block used to manage each Message Queue.

Field Documentation

◆ Inactive_messages

Chain_Control CORE_message_queue_Control::Inactive_messages

This chain is the set of inactive messages. A message is inactive when it does not contain a pending message.

◆ maximum_message_size

size_t CORE_message_queue_Control::maximum_message_size

This is the size in bytes of the largest message which may be sent via this queue.

◆ maximum_pending_messages

uint32_t CORE_message_queue_Control::maximum_pending_messages

This element is maximum number of messages which may be pending at any given time.

◆ message_buffers

CORE_message_queue_Buffer* CORE_message_queue_Control::message_buffers

This is the address of the memory allocated for message buffers. It is allocated are part of message queue initialization and freed as part of destroying it.

◆ number_of_pending_messages

uint32_t CORE_message_queue_Control::number_of_pending_messages

This element is the number of messages which are currently pending.

◆ Pending_messages

Chain_Control CORE_message_queue_Control::Pending_messages

This chain is the set of pending messages. It may be ordered by message priority or in FIFO order.

◆ Wait_queue

Thread_queue_Control CORE_message_queue_Control::Wait_queue

This field is the Waiting Queue used to manage the set of tasks which are blocked waiting to receive a message from this queue.

The documentation for this struct was generated from the following file:

cpukit/include/rtems/score/coremsg.h

Data Fields