How to share a data segment in a DLL: problem:

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C

I have this situation:

program A which sends a sql query to a mysql client which in turns triggers (on update table T event) a user defined function in a dll B which updates a variable v.

program A then uses another function of the same dll B to read the variable v.

The variable v is declared in a shared data segment following the tecnique you describe in the article "How to share a data segment in a DLL".

I implemented functions in the dll to set and get the value of v.

My effort is to implement automatic update of the program's A variable v when the table T is updated by a remote query.

It happens that the modification of v made by the mysql client don't reflect themselves in program A and viceversa, as v was not shared.

But the things work fine if I perform a test with two (or more) instances of program A or two (or more) instances of the mysql client, instead of program A and mysql client.

Please help.

D.Iracà
Pisa Italy
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