Multitasking and containers

[Maciej Sobczak <no.spam@no.spam.com>]

Hi,

Paragraph 3 in Annex A says that it's OK to call any standard subprogram 
from concurrent tasks as long as the parameters do not overlap. John 
Barnes ("Progamming in Ada 2005") suggests that in order to (for 
example) read from the same container, the operations need to be 
protected "by using the normal techniques such as protected objects".

But reading from the protected object is not mutually exclusive (many 
readers are allowed) - so where's the gain? What's the difference 
between concurrent reads of, say, a Vector via protected object vs. 
direct access?

-- 
Maciej Sobczak : http://www.msobczak.com/
Programming    : http://www.msobczak.com/prog/