Message class

Public members Message( Thread *t_ptr, int msg_val ) Object constructor. You can specify the initial thread pointer and message value. Message *getNext( void ) void setNext( Message *m_ptr ) get or set the next message pointer Thread *getThread( void ) void setThread( Thread *t_ptr ) get or set the thread pointer int getMsgCode( void ) void setMsgCode( void ) get or set the message value

Private members Message *m_next; points to the successive message in a list or queue Thread *t_ptr; points to the thread which sent the message int m_message; value of the message

MessageFreeList class

Public members MessageFreeList( int list_size ) list constructor. It will create a list with list_size messages ~MessageFreeList( void ) destructor. All the messages in the list will be freed. Message *getMessage( void ) void putMessage( Message *m_ptr ) remove a node from the list or place it back in.

Private members Message *m_first; points to the first item in the list

MessageQueue class

Public members MessageQueue( void ) constructor. It prepares the queue for use. ~MessageQueue( void ) destructor. It will free all the messages left in the queue. void insertMessage( Message *m_ptr ) appends the given message to the queue void ins1Message( Message *m_ptr ) inserts the given message at the head of the queue Message *removeMessage( void ) removes the first message in the queue. It returns a pointer to it or NULL if the queue was empty Message *keyMessage( Thread *t_ptr ) Removes and return the first message in the queue sent by thread t_ptr. Returns NULL if none is found. Message *headMessage( void ) Returns a pointer to the first message in the queue, or NULL if the queue is empty.

Private members Message *m_first; pointer to the first message in the queue Message *m_last; pointer to the last message in the queue

Look at the header file: msgq.e

Look at the code: message.cc, messagefreelist.cc, messagequeue.cc