48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================
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#ifndef DMELEMENTHANDLE_H
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#define DMELEMENTHANDLE_H
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#ifdef _WIN32
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#pragma once
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#endif
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//-----------------------------------------------------------------------------
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// handle to an CDmElement
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//-----------------------------------------------------------------------------
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#define PERFORM_HANDLE_TYPECHECKING 0
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#if PERFORM_HANDLE_TYPECHECKING
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// this is here to make sure we're being type-safe about element handles
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// otherwise, the compiler lets us cast to bool incorrectly
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// the other solution would be to redefine DmElementHandle_t s.t. DMELEMENT_HANDLE_INVALID==0
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struct DmElementHandle_t
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{
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DmElementHandle_t() : handle( 0xffffffff ) {}
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explicit DmElementHandle_t( int h ) : handle( h ) {}
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inline bool operator==( const DmElementHandle_t &h ) const { return handle == h.handle; }
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inline bool operator!=( const DmElementHandle_t &h ) const { return handle != h.handle; }
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inline bool operator<( const DmElementHandle_t &h ) const { return handle < h.handle; }
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// inline operator int() const { return handle; } // if we're okay with implicit int casts, uncomment this method
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int handle;
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};
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const DmElementHandle_t DMELEMENT_HANDLE_INVALID;
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#else // PERFORM_HANDLE_TYPECHECKING
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enum DmElementHandle_t
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{
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DMELEMENT_HANDLE_INVALID = 0xffffffff
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};
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#endif // PERFORM_HANDLE_TYPECHECKING
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#endif // DMELEMENTHANDLE_H
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