Using MailSlots to communicate between apps.

Flype · Post by **Flype** » Sat Jun 09, 2007 6:38 pm

sorry if it has already be done,

i'm testing mailslots to send/receive datas from an app to another.

here is little archive if you want to test (free to use) :

MailSlot.zip

More infos here on MSDN :
http://msdn2.microsoft.com/en-us/library/aa365147.aspx

Flype · Post by **Flype** » Sat Jun 09, 2007 8:55 pm

updated.

Declare.l MailSlot_WriteString(hSlot.l, string.s) ; Writes a string to the given mailslot.
Declare.l MailSlot_WriteData(hSlot.l, *MemoryBuffer, LengthToWrite.l) ; Writes the content of the specified memory buffer to the given mailslot.
Declare.s MailSlot_ReadString(hSlot.l) ; Reads a string from the given mailslot.
Declare.l MailSlot_ReadData(hSlot.l, *MemoryBuffer, LengthToRead.l) ; Reads the content from the given mailslot inside the specified memory buffer.
Declare.l MailSlot_Open(SlotName.s) ; Open an existing mailslot, must be closed using CloseSlot().
Declare.l MailSlot_Next(hSlot.l) ; Returns #True if there are one or more messages in the given mailslot.
Declare.s MailSlot_LastError() ; Returns a formatted string of the last error.
Declare.l MailSlot_Create(SlotName.s) ; Creates a mailslot, must be closed using CloseSlot().
Declare.l MailSlot_Close(hSlot.l) ; Close an existing mailslot.

Chrono Syndrome · Post by **Chrono Syndrome** » Mon Jun 11, 2007 4:23 pm

Good job.

Inf0Byt3 · Post by **Inf0Byt3** » Mon Jun 11, 2007 4:52 pm

This is pretty usefull. Thanks Flype!

blueznl · Post by **blueznl** » Mon Jun 11, 2007 6:12 pm

Seems to be a hot topic lately

Mailslots work well, they're just limited to 400+ bytes I believe, but that should be enough for many cases.

Gonna have a look at it myself later

blueznl · Post by **blueznl** » Mon Jun 11, 2007 11:33 pm

Doing a search on the boards indeed showed a few cases, but that isn't going to stop us, is it?

http://www.purebasic.fr/english/viewtop ... 997#198997

Flype · Post by **Flype** » Tue Jun 12, 2007 12:36 am

nice example, you learn fast

blueznl · Post by **blueznl** » Tue Jun 12, 2007 3:34 pm

Actually, I did not even use your sample, I admit I had a look at it, but as I'm not into libraries I decided to figure it out on my own the best way I could, by bumbling and stumbling around

I didn't test yet the 'multiple mailslot' thing, can multiple programs have the same mailslot open? Documentation was a bit conclicting on that one. Did you look into that?