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protecting access to std::map

I have multiple threads that need access to single std::map. Currently
I am using mutex's to regulate ANY access to the list.

My questionion is, is it safe to have multiple threads READING the list
at the same time, so long as they don't alter it?

~S

Jul 19 '05 #1
2 2812
joe
Shea Martin <sm*****@arcis.com> writes:
I have multiple threads that need access to single std::map.
Currently I am using mutex's to regulate ANY access to the list.

My questionion is, is it safe to have multiple threads READING the
list at the same time, so long as they don't alter it?


Theoretically, unless there's a thread writing to it as well.

Try posting this question to comp.programming.threads

Joe
Jul 19 '05 #2


jo*@invalid.address wrote:
Shea Martin <sm*****@arcis.com> writes:

I have multiple threads that need access to single std::map.
Currently I am using mutex's to regulate ANY access to the list.

My questionion is, is it safe to have multiple threads READING the
list at the same time, so long as they don't alter it?

Theoretically, unless there's a thread writing to it as well.

Try posting this question to comp.programming.threads

Joe


I would have to agree with this answer. Many std::map's are
implemented as an AVL tree under the covers. It would not
do to well to be doing a read-only walk down a tree when the
pointers begin shifting around.

--

Fletcher Glenn

Jul 19 '05 #3

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