/osf

midl /osf

Examples

midl /osf filename.idl 
midl /osf /app_config filename.idl 
 

Remarks

The /osf switch forces strict compatibility with OSF DCE. Use this switch if your application requires strict compatibility with OSF DCE for portability reasons.

In /osf mode, the Rpcss package is automatically enabled when you use full pointers, the arguments require memory allocation, or when you use the enable_allocate attribute. This means that you do not have to supply the midl_user_allocate and midl_user_free functions in your client and server application.

The following Microsoft-extended features are not available when you compile with the /osf switch:

• Abstract declarators (unnamed parameters) in the IDL file.
• Interface definitions for COM objects.
• Interface names with more than 17 characters.
• MIDL-only attributes, such as wire_marshal, user_marshal, and the typelib (ODL)extensions.
• Using ACF keywords in an IDL file (the MIDL /app_config option).
• Static callback functions on the client.
• cpp_quote(quoted_string) and #pragma midl_echo.
• wchar_t wide-character types, constants, and strings.
• enum initialization (sparse enumerators).
• [out] -only size specification.
• Mixed sized-pointers and sized arrays.
• Expressions used for size and discriminator specifiers.
• Explicit handle parameters in any position in the argument list. In /osf mode, the MIDL compiler looks for an explicit binding handle as the first parameter. When the first parameter is not a binding handle and one or more context handles are specified, the leftmost context handle is used as the binding handle. When the first parameter is not a handle and there are no context handles, the procedure uses implicit binding using the ACF attribute implicit_handle or auto_handle.
• Pointer-attribute type inheritance. OSF DCE does not allow unattributed pointers. Therefore, in /osf mode each IDL file must define attributes for its pointers. If any pointer does not have an explicit attribute, the IDL file must have a pointer_default specification to set the pointer type.
• Multiple interfaces in an IDL file.
• Definitions outside of the interface block.
• Type qualifiers such as far and stdcall.
• Omitting directional attributes.

The following C/C++ language extensions are not available when you compile with the /osf switch:

• Bit fields in structures and unions.
• Single line comments delimited with two slash characters (//).
• External declarations.
• Procedures with ellipses in the parameter list.
• Type int.
• Type void * (except with the context_handle attribute).
• Type qualifiers, including the form with the ANSI-conformant prefix, contain two underscore characters: _ _cdecl, cdecl, _ _const, const, _ _export, export, _ _far, far, _ _loadds, loadds, _ _near, near, _ _pascal, pascal, _ _stdcall, stdcall, _ _volatile, and volatile.

See Also

General MIDL Command-line Syntax, /app_config, /ms_ext, Rpcss Memory Management Model