mirror of
https://github.com/godotengine/godot.git
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217 lines
4.9 KiB
C++
217 lines
4.9 KiB
C++
/*************************************************************************/
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/* rid.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef RID_H
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#define RID_H
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#include "safe_refcount.h"
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#include "typedefs.h"
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#include "os/memory.h"
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#include "hash_map.h"
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#include "list.h"
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/**
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@author Juan Linietsky <reduzio@gmail.com>
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*/
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class RID_OwnerBase;
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typedef uint32_t ID;
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class RID {
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friend class RID_OwnerBase;
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ID _id;
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RID_OwnerBase *owner;
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public:
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_FORCE_INLINE_ ID get_id() const { return _id; }
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bool operator==(const RID& p_rid) const {
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return _id==p_rid._id;
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}
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_FORCE_INLINE_ bool operator<(const RID& p_rid) const {
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return _id < p_rid._id;
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}
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_FORCE_INLINE_ bool operator<=(const RID& p_rid) const {
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return _id <= p_rid._id;
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}
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_FORCE_INLINE_ bool operator>(const RID& p_rid) const {
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return _id > p_rid._id;
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}
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bool operator!=(const RID& p_rid) const {
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return _id!=p_rid._id;
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}
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_FORCE_INLINE_ bool is_valid() const { return _id>0; }
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operator const void*() const {
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return is_valid() ? this : 0;
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};
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_FORCE_INLINE_ RID() {
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_id = 0;
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owner=0;
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}
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};
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class RID_OwnerBase {
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protected:
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friend class RID;
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void set_id(RID& p_rid, ID p_id) const { p_rid._id=p_id; }
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void set_ownage(RID& p_rid) const { p_rid.owner=const_cast<RID_OwnerBase*>(this); }
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ID new_ID();
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public:
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virtual bool owns(const RID& p_rid) const=0;
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virtual void get_owned_list(List<RID> *p_owned) const=0;
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static void init_rid();
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virtual ~RID_OwnerBase() {}
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};
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template<class T,bool thread_safe=false>
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class RID_Owner : public RID_OwnerBase {
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public:
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typedef void (*ReleaseNotifyFunc)(void*user,T *p_data);
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private:
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Mutex *mutex;
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mutable HashMap<ID,T*> id_map;
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public:
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RID make_rid(T * p_data) {
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if (thread_safe) {
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mutex->lock();
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}
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ID id = new_ID();
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id_map[id]=p_data;
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RID rid;
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set_id(rid,id);
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set_ownage(rid);
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if (thread_safe) {
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mutex->unlock();
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}
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return rid;
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}
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_FORCE_INLINE_ T * get(const RID& p_rid) {
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if (thread_safe) {
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mutex->lock();
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}
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T**elem = id_map.getptr(p_rid.get_id());
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if (thread_safe) {
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mutex->unlock();
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}
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ERR_FAIL_COND_V(!elem,NULL);
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return *elem;
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}
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virtual bool owns(const RID& p_rid) const {
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if (thread_safe) {
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mutex->lock();
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}
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T**elem = id_map.getptr(p_rid.get_id());
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if (thread_safe) {
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mutex->lock();
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}
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return elem!=NULL;
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}
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virtual void free(RID p_rid) {
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if (thread_safe) {
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mutex->lock();
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}
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ERR_FAIL_COND(!owns(p_rid));
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id_map.erase(p_rid.get_id());
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}
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virtual void get_owned_list(List<RID> *p_owned) const {
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if (thread_safe) {
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mutex->lock();
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}
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const ID*id=NULL;
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while((id=id_map.next(id))) {
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RID rid;
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set_id(rid,*id);
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set_ownage(rid);
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p_owned->push_back(rid);
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}
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if (thread_safe) {
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mutex->lock();
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}
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}
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RID_Owner() {
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if (thread_safe) {
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mutex = Mutex::create();
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}
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}
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~RID_Owner() {
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if (thread_safe) {
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memdelete(mutex);
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}
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}
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};
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#endif
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