diff -r e28a9247061f -r 9ac720a36ce4 core/systems/HandleSys.h --- a/core/systems/HandleSys.h Wed Nov 19 02:14:43 2008 -0600 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,225 +0,0 @@ -/** - * vim: set ts=4 : - * ============================================================================= - * SourceMod - * Copyright (C) 2004-2008 AlliedModders LLC. All rights reserved. - * ============================================================================= - * - * This program is free software; you can redistribute it and/or modify it under - * the terms of the GNU General Public License, version 3.0, as published by the - * Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS - * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more - * details. - * - * You should have received a copy of the GNU General Public License along with - * this program. If not, see . - * - * As a special exception, AlliedModders LLC gives you permission to link the - * code of this program (as well as its derivative works) to "Half-Life 2," the - * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software - * by the Valve Corporation. You must obey the GNU General Public License in - * all respects for all other code used. Additionally, AlliedModders LLC grants - * this exception to all derivative works. AlliedModders LLC defines further - * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007), - * or . - * - * Version: $Id$ - */ - -#ifndef _INCLUDE_SOURCEMOD_HANDLESYSTEM_H_ -#define _INCLUDE_SOURCEMOD_HANDLESYSTEM_H_ - -#include -#include -#include "sm_globals.h" -#include "sm_trie.h" -#include "sourcemod.h" -#include "sm_memtable.h" - -#define HANDLESYS_MAX_HANDLES (1<<14) -#define HANDLESYS_MAX_TYPES (1<<9) -#define HANDLESYS_MAX_SUBTYPES 0xF -#define HANDLESYS_SUBTYPE_MASK 0xF -#define HANDLESYS_TYPEARRAY_SIZE (HANDLESYS_MAX_TYPES * (HANDLESYS_MAX_SUBTYPES + 1)) -#define HANDLESYS_MAX_SERIALS 0xFFFF -#define HANDLESYS_SERIAL_MASK 0xFFFF0000 -#define HANDLESYS_HANDLE_MASK 0x0000FFFF - -#define HANDLESYS_MEMUSAGE_MIN_VERSION 3 - -/** - * The QHandle is a nasty structure that compacts the handle system into a big vector. - * The members of the vector each encapsulate one Handle, however, they also act as nodes - * in an inlined linked list and an inlined vector. - * - * The first of these lists is the 'freeID' list. Each node from 1 to N (where N - * is the number of free nodes) has a 'freeID' that specifies a free Handle ID. This - * is a quick hack to get around allocating a second base vector. - * - * The second vector is the identity linked list. An identity has its own handle, so - * these handles are used as sentinel nodes for index linking. They point to the first and last - * index into the handle array. Each subsequent Handle who is owned by that identity is mapped into - * that list. This lets owning identities be unloaded in O(n) time. - * - * Eventually, there may be a third list for type chains. - */ - -enum HandleSet -{ - HandleSet_None = 0, - HandleSet_Used, /* The Handle is in use */ - HandleSet_Freed, /* The "master" Handle of a clone chain is freed */ - HandleSet_Identity, /* The Handle is a special identity */ -}; - -struct QHandle -{ - HandleType_t type; /* Handle type */ - void *object; /* Unmaintained object pointer */ - IdentityToken_t *owner; /* Identity of object which owns this */ - unsigned int serial; /* Serial no. for sanity checking */ - unsigned int refcount; /* Reference count for safe destruction */ - unsigned int clone; /* If non-zero, this is our cloned parent index */ - HandleSet set; /* Information about the handle's state */ - bool access_special; /* Whether or not access rules are special or type-derived */ - bool is_destroying; /* Whether or not the handle is being destroyed */ - HandleAccess sec; /* Security rules */ - /* The following variables are unrelated to the Handle array, and used - * as an inlined chain of information */ - unsigned int freeID; /* ID of a free handle in the free handle chain */ - /* Indexes into the handle array for owner membership. - * For identity roots, these are treated as the head/tail. */ - unsigned int ch_prev; /* chained previous handle */ - unsigned int ch_next; /* chained next handle */ -}; - -struct QHandleType -{ - IHandleTypeDispatch *dispatch; - unsigned int freeID; - unsigned int children; - TypeAccess typeSec; - HandleAccess hndlSec; - unsigned int opened; - int nameIdx; -}; - -typedef void (HANDLE_REPORTER)(const char *str, ...); - -class HandleSystem : - public IHandleSys -{ - friend HandleError IdentityHandle(IdentityToken_t *token, unsigned int *index); - friend class ShareSystem; -public: - HandleSystem(); - ~HandleSystem(); -public: //IHandleSystem - - HandleType_t CreateType(const char *name, - IHandleTypeDispatch *dispatch, - HandleType_t parent, - const TypeAccess *typeAccess, - const HandleAccess *hndlAccess, - IdentityToken_t *ident, - HandleError *err); - - bool RemoveType(HandleType_t type, IdentityToken_t *ident); - - bool FindHandleType(const char *name, HandleType_t *type); - - Handle_t CreateHandle(HandleType_t type, - void *object, - IdentityToken_t *owner, - IdentityToken_t *ident, - HandleError *err); - - HandleError FreeHandle(Handle_t handle, const HandleSecurity *pSecurity); - - HandleError CloneHandle(Handle_t handle, - Handle_t *newhandle, - IdentityToken_t *newOwner, - const HandleSecurity *pSecurity); - - HandleError ReadHandle(Handle_t handle, - HandleType_t type, - const HandleSecurity *pSecurity, - void **object); - - bool InitAccessDefaults(TypeAccess *pTypeAccess, HandleAccess *pHandleAccess); - - bool TypeCheck(HandleType_t intype, HandleType_t outtype); - - virtual Handle_t CreateHandleEx(HandleType_t type, - void *object, - const HandleSecurity *pSec, - const HandleAccess *pAccess, - HandleError *err); - - void Dump(HANDLE_REPORTER rep); -protected: - /** - * Decodes a handle with sanity and security checking. - */ - HandleError GetHandle(Handle_t handle, - IdentityToken_t *ident, - QHandle **pHandle, - unsigned int *index, - bool ignoreFree=false); - - /** - * Creates a basic handle and sets its reference count to 1. - * Does not do any type or security checking. - */ - HandleError MakePrimHandle(HandleType_t type, - QHandle **pHandle, - unsigned int *index, - HandleType_t *handle, - IdentityToken_t *owner, - bool identity=false); - - /** - * Frees a primitive handle. Does no object freeing, only reference count, bookkeeping, - * and linked list maintenance. - * If used on an Identity handle, destroys all Handles under that identity. - */ - void ReleasePrimHandle(unsigned int index); - - /** - * Sets the security owner of a type. - */ - void SetTypeSecurityOwner(HandleType_t type, IdentityToken_t *pToken); - - /** - * Helper function to check access rights. - */ - bool CheckAccess(QHandle *pHandle, HandleAccessRight right, const HandleSecurity *pSecurity); - - /** - * Some wrappers for internal functions, so we can pass indexes instead of encoded handles. - */ - HandleError FreeHandle(QHandle *pHandle, unsigned int index); - void UnlinkHandleFromOwner(QHandle *pHandle, unsigned int index); - HandleError CloneHandle(QHandle *pHandle, unsigned int index, Handle_t *newhandle, IdentityToken_t *newOwner); - Handle_t CreateHandleInt(HandleType_t type, void *object, const HandleSecurity *pSec, HandleError *err, const HandleAccess *pAccess, bool identity); - - bool TryAndFreeSomeHandles(); - HandleError TryAllocHandle(unsigned int *handle); -private: - QHandle *m_Handles; - QHandleType *m_Types; - Trie *m_TypeLookup; - unsigned int m_TypeTail; - unsigned int m_FreeTypes; - unsigned int m_HandleTail; - unsigned int m_FreeHandles; - unsigned int m_HSerial; - BaseStringTable *m_strtab; -}; - -extern HandleSystem g_HandleSys; - -#endif //_INCLUDE_SOURCEMOD_HANDLESYSTEM_H_