c++ struct and container

Question

I am writing a small software which deals with inter-process multicast. For each message, on each process, I have a couple of variables assigned to the message itself:

messageID
senderID
ack1
ack2
ack3
...

I would like to put these elements (which are many) in a container, so that it is later easy to perform operations such as changing the value of ack1 for a given messageID (I should keep trace of which processes in my group notified me that they got the message).

Which is the best container to use in this case?

Thanks

Are your MessageIDs unique identifiers for each message?

RedX
– RedX

2011-03-08 14:56:19 +00:00
Commented Mar 8, 2011 at 14:56 — RedX
– RedX, Commented Mar 8, 2011 at 14:56

the_drow · Accepted Answer · 2011-03-08 16:15:09Z

1

You might want to use std::map or boost::unordered_map (soon to be standard) as you can access it by message id.
Next time you'd want to answer such a question alone, take a look at this diagram.

edited Mar 8, 2011 at 16:15

answered Mar 8, 2011 at 14:45

the_drow

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2 Comments

Danilo Over a year ago

Thanks for the diagram, too! :)

the_drow Over a year ago

@Danilo The appropriate way to acknowledge a good answer is an upvote in stackoverflow. You are more than welcome to do so :)

Cosmin · Accepted Answer · 2011-03-08 14:43:06Z

1

You can use a map to easily fetch a structure by messageID: http://www.cplusplus.com/reference/stl/map/

edited Mar 8, 2011 at 14:43

answered Mar 8, 2011 at 14:34

Cosmin

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1 Comment

RedX Over a year ago

boost::multi_map or c++0x multimap.

ali_bahoo · Accepted Answer · 2011-03-08 14:53:07Z

1

In addition to std::map and boost::unordered_map, if you plan to iterate over the messages from a given senderID you can use boost::multi_index_container.

answered Mar 8, 2011 at 14:53

ali_bahoo

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