if i have two processes; and i need to sync the read and write for
this two processes. I just have 2 processes, one do just read, one
just write.

Process A read, and Process B wtite to shared memory.

To better illustrate my point: -

Initial state: writeStatus ON, readStatus OFF
Process A to read, B to write.

Now let's say the sequence of happening is as follow:-

1)A check writeStatus, it is ON, so it waits.
2)B check ReadStatus, it is OFF, so it can write.
3)B now got data, so it writes.
4)B finished, set writeStatus to OFF, (NOTE:-at this point readStatus
is still OFF!!!)

5)A check writeStatus, it is OFF, so it can read.
6)A goes to read, but before A has a chance to set readStatus to ON, B
got some data and seeing that readStatus is OFF, it thought it can
write!!!


I need help on how to solve this...

pfnus wrote:
Pipes do just what you need, in fact pipes internally use shared
memory as FIFO buffer... Find help for CreateNamedPipe. It's easy to
use them, and you won't be needing events then.

Mailslot is another option
"Mihajlo Cvetanovic" <mac@RnEeMtOsVeEt.co.yu> wrote in message
news:40B75A3D.3020804@RnEeMtOsVeEt.co.yu...

Both are good options but if OP want's to keep his current code
then using a a critical section (or mutex) to syncronize data buffer
access would seem like a good replacement for the events.

- Sten
"lev" <ltsentsiper@brandsoft.com> wrote in message
news:CnJtc.4983$pt3.1342@attbi_s03...