49 lines
1.5 KiB
C
49 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.
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// DMELEMENT_HANDLE_INVALID==0
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struct DmElementHandle_t {
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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 {
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return handle == h.handle;
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}
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inline bool operator!=(const DmElementHandle_t &h) const {
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return handle != h.handle;
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}
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inline bool operator<(const DmElementHandle_t &h) const {
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return handle < h.handle;
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}
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// inline operator int() const { return handle; } // if we're okay with
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//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 { DMELEMENT_HANDLE_INVALID = 0xffffffff };
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#endif // PERFORM_HANDLE_TYPECHECKING
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#endif // DMELEMENTHANDLE_H
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