Hi, I am working on a Project which was using the Windows based Platform. I wish to make it work on the Linux Platform.

In a file which is using a term HANDLE (i suppose being defined in Windows.h File), i am facing problem.

Can any one suggest some alternative for this definition ?


thanks

Sheena !

A HANDLE in Windows, is basically a void* that is used to identify a resource. (fonts, bitmaps, windows, etc.) In WinNT.h, it is defined as:

typedef void *HANDLE;

Yes thats fine
But What is the substitue in Linux.
I want to make my source code running!!!!

As I said already:

typedef void *HANDLE;

If you are trying to convert something that gives you a specific type of HANDLE you are going to have to be a LOT more specific, because for obvious reasons, the Win32 API calls do not work under Linux.

Can any one let me know :

How to make HANDLE work in Linux....from the source files which were running in Windows system

A void* works equally fine under linux or any other O/S, even when called HANDLE.
The problem is not with this type name, but with the rest of the code you want to port.
Instead of trying that, one way to explore could be using Wine to make your program directly run under linux.

iirc, a handle is actually a DWORD, aka u_int; usually just a small unsigned integer identifier.

The typedef I posted is pulled right out of winnt.h. The way it's used, it isn't conceptually that much different from a DWORD, though.

my bad, thanks for clearin up. and yup i guess u can cast it to w/e u want anyhow

isn`t a file descriptor the Linux equivalent of a handle?

no, a file descriptor directly map to a kernel per process table allowing read an write operations to files and sockets, while a handle is working at libray level to access things like windows, fonts, nothing about kernel nor I/O ...

That's not completely accurate. There is an HANDLE in Win32 that is returned and used by functions like CreateFile, WriteFile, ReadFile, etc.

Anyway, unless the original poster tells us EXACTLY what functions he's trying to get to work in Linux there is no way anyone can tell him what the equivalent would be in Linux. My suggestion to him would be to learn one of the GUI APIs for linux like GDK+, then try to learn at least enough about the Win32 API that he can understand how he needs to port it. (Or whatever his app is currently using, be it MFC, OWL, etc..) It's either that or trying to get it working with wine, as someone else already mentioned.

Just knowing that a HANDLE is really a void* likely isn't going to be enough...