/*++

Copyright (c) Microsoft Corporation.

Licensed under the MIT license.

Module Name:

globals.h

Abstract:

Contains declarations for all globally scoped names in the program.

This file defines the CBoolean Interface Class.

Author:

Revision History:

Notes:

--*/

#pragma once

//

// SAFECAST(obj, type)

//

// This macro is extremely useful for enforcing strong typechecking on other

// macros. It generates no code.

//

// Simply insert this macro at the beginning of an expression list for

// each parameter that must be typechecked. For example, for the

// definition of MYMAX(x, y), where x and y absolutely must be integers,

// use:

//

// #define MYMAX(x, y) (SAFECAST(x, int), SAFECAST(y, int), ((x) > (y) ? (x) : (y)))

//

//

#define SAFECAST(_obj, _type) (((_type)(_obj)==(_obj)?0:0), (_type)(_obj))

//

// Bitfields don't get along too well with bools,

// so here's an easy way to convert them:

//

#define BOOLIFY(expr) (!!(expr))

//

// generic COM stuff

//

#define SafeReleaseClear(punk) \

{ \

if ((punk) != NULL) \

{ \

(punk)->Release(); \

(punk) = NULL; \

} \

}