[delphizip] no multithread ZipMaster
- From: "Russell Peters" <russellpeters@xxxxxxxxxxx>
- To: <delphizip@xxxxxxxxxxxxx>
- Date: Sun, 17 Nov 2002 11:21:54 +1100
Been testing ZipMaster running on two threads simultaneously and found a
problem - the callback function.
There is only one copy of it being used by each thread - this might explain the
(apparently) random exceptions I sometimes get.
There are a number of ways around this problem, I can think of two
1. use critical sections in the callback function (slows up other thread
waiting & I don't know how as yet)
2. make changes to use a class based callback function - in theory same as
stcall but first arg is self (caller).
I am open to any suggestions, but favour the second way.
The testing also showed me that the callback is used a lot - even if everything
is ignored.
I propose filtering its use a bit (pass a control flag to control 'types' of
information sent).
Russell Peters
http://www.users.bigpond.com/russellpeters/delphizip.html
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