Murl::Util::MessageQueue Class Reference

The message queue class is used to send and wait for Message objects, see MessageThread. More...

#include "murl_util_message_queue.h"

Public Types
enum	Result { FAILED , RECEIVED , TIMEOUT , QUIT }
	Enumeration of the message queue results. More...

Public Member Functions
	MessageQueue ()
	The default constructor. More...
virtual	~MessageQueue ()
	The destructor.
UInt32	GetMaxMessageQueueLength () const
	Get the maximum number of messages the queue can store. More...
void	SetMaxMessageQueueLength (UInt32 maxLength)
	Set the maximum number of messages the queue can store. More...
void	ClearMessageQueue ()
	Clear the message queue.
Bool	SendMessage (Message::AutoPtr message)
	Add a message to the message queue. More...
Bool	SendSyncMessage (Message::AutoPtr message)
	Add a message the the message queue and wait until the message is delivered and processed, see Message. More...
Result	WaitMessage (Message::AutoPtr &message, UInt32 msgIdStart, UInt32 msgIdEnd)
	Wait for a message. More...
Result	WaitMessage (Message::AutoPtr &message, const System::Time &timeout, UInt32 msgIdStart, UInt32 msgIdEnd)
	Wait for a message with time out. More...
Result	GetMessage (Message::AutoPtr &message, UInt32 msgIdStart, UInt32 msgIdEnd)
	Get a message from the message queue. More...
Result	PeekMessage (const Message *&message, UInt32 msgIdStart, UInt32 msgIdEnd)
	Peek a message from the message queue. More...

Protected Member Functions
Result	GetMessage (Message *&message, UInt32 msgIdStart, UInt32 msgIdEnd, Bool remove)
	Get a message raw pointer from the message queue. More...

Protected Attributes
System::Mutex	mMutex
	The message class mutex.
System::Semaphore	mMessageArrived
	The message queue semaphore.
UInt32	mMaxMessageQueueLength
	The maximum message queue length.
Array< Message::AutoPtr >	mMessages
	The message queue.

Detailed Description

The message queue class is used to send and wait for Message objects, see MessageThread.

Member Enumeration Documentation

Result

enum Murl::Util::MessageQueue::Result

Enumeration of the message queue results.

Enumerator
FAILED	Receiving a message failed.
RECEIVED	Received a message.
TIMEOUT	Timeout receiving a message.
QUIT	Received the quit message.

Constructor & Destructor Documentation

MessageQueue()

Murl::Util::MessageQueue::MessageQueue

(

)

The default constructor.

Set the message queue length to 1000.

Member Function Documentation

GetMaxMessageQueueLength()

UInt32 Murl::Util::MessageQueue::GetMaxMessageQueueLength

(

)

const

Get the maximum number of messages the queue can store.

The default message queue length is 1000.

Returns

The maximum number of messages the queue can store.

SetMaxMessageQueueLength()

void Murl::Util::MessageQueue::SetMaxMessageQueueLength

(

UInt32

maxLength

)

Set the maximum number of messages the queue can store.

Parameters

maxLength

The maximum number of messages the queue can store.

SendMessage()

Bool Murl::Util::MessageQueue::SendMessage

(

Message::AutoPtr

message

)

Add a message to the message queue.

Parameters

message

The message to send.

Returns

true if successful, false if the maximum message queue length is reached.

SendSyncMessage()

Bool Murl::Util::MessageQueue::SendSyncMessage

(

Message::AutoPtr

message

)

Add a message the the message queue and wait until the message is delivered and processed, see Message.

Parameters

message

The message to send.

Returns

true if successful, false if the maximum message queue length is reached.

WaitMessage() [1/2]

Result Murl::Util::MessageQueue::WaitMessage	(	Message::AutoPtr &	message,
		UInt32	msgIdStart,
		UInt32	msgIdEnd
	)

Wait for a message.

Parameters

message	The message return value. The message returned is removed from the message queue.
msgIdStart	Message identifier range start. Use Message::ID_ANY to receive any message (set msgIdEnd to zero).
msgIdEnd	Message identifier range end.

Returns

The message queue result.

WaitMessage() [2/2]

Result Murl::Util::MessageQueue::WaitMessage	(	Message::AutoPtr &	message,
		const System::Time &	timeout,
		UInt32	msgIdStart,
		UInt32	msgIdEnd
	)

Wait for a message with time out.

Parameters

message	The message return value. The message returned is removed from the message queue.
timeout	The maximum time to wait.
msgIdStart	Message identifier range start. Use Message::ID_ANY to receive any message (set msgIdEnd to zero).
msgIdEnd	Message identifier range end.

Returns

The message queue result.

GetMessage() [1/2]

Result Murl::Util::MessageQueue::GetMessage	(	Message::AutoPtr &	message,
		UInt32	msgIdStart,
		UInt32	msgIdEnd
	)

Get a message from the message queue.

Parameters

message	The message return value. The message returned is removed from the message queue.
msgIdStart	Message identifier range start. Use Message::ID_ANY to receive any message (set msgIdEnd to zero).
msgIdEnd	Message identifier range end.

Returns

The message queue result.

PeekMessage()

Result Murl::Util::MessageQueue::PeekMessage	(	const Message *&	message,
		UInt32	msgIdStart,
		UInt32	msgIdEnd
	)

Peek a message from the message queue.

Checks if a message is in the message queue but does not remove the message from the message queue.

Parameters

message	The message return value.
msgIdStart	Message identifier range start. Use Message::ID_ANY to receive any message (set msgIdEnd to zero).
msgIdEnd	Message identifier range end.

Returns

The message queue result.

GetMessage() [2/2]

Result Murl::Util::MessageQueue::GetMessage ( Message *&  message, UInt32  msgIdStart, UInt32  msgIdEnd, Bool  remove  )

protected

Get a message raw pointer from the message queue.

Parameters

message	The message return value.
msgIdStart	Message identifier range start. Use Message::ID_ANY to receive any message (set msgIdEnd to zero).
msgIdEnd	Message identifier range end.
remove	If true remove the message from the queue.

Returns

The message queue result.

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

• murl_util_message_queue.h