97 lines
2.7 KiB
C++
97 lines
2.7 KiB
C++
/**
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* vim: set ts=4 sw=4 tw=99 noet :
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* =============================================================================
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* SourceMod
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* Copyright (C) 2004-2014 AlliedModders LLC. All rights reserved.
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* =============================================================================
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, version 3.0, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* As a special exception, AlliedModders LLC gives you permission to link the
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* code of this program (as well as its derivative works) to "Half-Life 2," the
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* "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
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* by the Valve Corporation. You must obey the GNU General Public License in
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* all respects for all other code used. Additionally, AlliedModders LLC grants
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* this exception to all derivative works. AlliedModders LLC defines further
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* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
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* or <http://www.sourcemod.net/license.php>.
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*
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* Version: $Id$
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*/
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#ifndef _include_sourcemod_handle_helpers_h_
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#define _include_sourcemod_handle_helpers_h_
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#include "common_logic.h"
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#include <IHandleSys.h>
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// T must be a pointer type.
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template <typename T>
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class OpenHandle
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{
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public:
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OpenHandle()
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: t_(),
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error_(HandleError_None)
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{}
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explicit OpenHandle(T *t)
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: t_(t),
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error_(HandleError_None)
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{}
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OpenHandle(const OpenHandle &other)
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: t_(other.t_),
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error_(other.error_)
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{}
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OpenHandle(IPluginContext *cx, Handle_t handle, HandleType_t type)
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: t_(NULL)
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{
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HandleSecurity sec(cx->GetIdentity(), g_pCoreIdent);
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error_ = handlesys->ReadHandle(handle, type, &sec, (void **)&t_);
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if (error_ != HandleError_None)
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cx->ThrowNativeError("invalid handle %x (error: %d)", handle, error_);
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}
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bool Ok() const {
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return t_ && error_ == HandleError_None;
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}
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operator T *() const {
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assert(Ok());
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return t_;
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}
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T *operator *() const {
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assert(Ok());
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return t_;
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}
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T *operator ->() const {
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assert(Ok());
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return t_;
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}
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OpenHandle &operator =(T *t) {
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t_ = t;
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error_ = HandleError_None;
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return *this;
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}
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OpenHandle &operator =(const OpenHandle &other) {
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t_ = other.t_;
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error_ = other.error_;
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return *this;
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}
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private:
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T *t_;
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HandleError error_;
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};
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#endif // _include_sourcemod_handle_helpers_h_
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