core/smn_handles.cpp
author David Anderson <dvander@alliedmods.net>
Tue Jan 02 01:44:46 2007 +0000 (2007-01-02)
changeset 259 ca9b124a2544
parent 252 ce166c465bad
child 262 de0e374ffa47
permissions -rw-r--r--
fixed various issues in the handle system with cloning
fixed plugins being able to free each other's handles
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#include "sm_globals.h"
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#include "HandleSys.h"
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#include "PluginSys.h"
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static cell_t sm_IsValidHandle(IPluginContext *pContext, const cell_t *params)
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{
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	Handle_t hndl = static_cast<Handle_t>(params[1]);
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	HandleError err = g_HandleSys.ReadHandle(hndl, 0, NULL, NULL);
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	if (err != HandleError_Access
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		&& err != HandleError_None)
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	{
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		return 0;
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	}
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	return 1;
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}
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static cell_t sm_CloseHandle(IPluginContext *pContext, const cell_t *params)
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{
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	Handle_t hndl = static_cast<Handle_t>(params[1]);
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	/* :TODO: make this a little bit cleaner, eh? */
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	IPlugin *pPlugin = g_PluginSys.FindPluginByContext(pContext->GetContext());
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	HandleError err = g_HandleSys.FreeHandle(hndl, pPlugin->GetIdentity(), NULL);
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	if (err == HandleError_None)
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	{
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		return 1;
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	} else if (err == HandleError_Access) {
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		return 0;
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	} else {
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		return pContext->ThrowNativeError("Handle %x is invalid (error %d)", hndl, err);
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	}
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}
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static cell_t sm_CloneHandle(IPluginContext *pContext, const cell_t *params)
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{
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	Handle_t new_hndl;
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	Handle_t hndl = static_cast<Handle_t>(params[1]);
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	IPlugin *pPlugin;
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	HandleError err;
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	if (params[2] == 0)
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	{
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		pPlugin = g_PluginSys.FindPluginByContext(pContext->GetContext());
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	} else {
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		Handle_t hPlugin = static_cast<Handle_t>(params[2]);
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		pPlugin = g_PluginSys.PluginFromHandle(hPlugin, &err);
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		if (!pPlugin)
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		{
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			return pContext->ThrowNativeError("Plugin handle %x is invalid (error %d)", hndl, err);
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		}
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	}
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	err = g_HandleSys.CloneHandle(hndl, &new_hndl, pPlugin->GetIdentity(), NULL);
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	if (err == HandleError_Access)
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	{
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		return 0;
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	} else if (err == HandleError_None) {
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		return new_hndl;
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	} else {
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		return pContext->ThrowNativeError("Handle to clone %x is invalid (error %d)", hndl, err);
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	}
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}
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REGISTER_NATIVES(handles)
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{
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	{"IsValidHandle",			sm_IsValidHandle},
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	{"CloseHandle",				sm_CloseHandle},
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	{"CloneHandle",				sm_CloneHandle},
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	{NULL,						NULL},
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};