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95047562d7
A general speedup should be apparent, with even more peformance increase when compiling optimized. WARNING: Tested and it seems to work, but if something breaks, please report.
413 lines
8.8 KiB
C++
413 lines
8.8 KiB
C++
/*************************************************************************/
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/* vector.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 VECTOR_H
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#define VECTOR_H
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/**
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* @class Vector
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* @author Juan Linietsky
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* Vector container. Regular Vector Container. Use with care and for smaller arrays when possible. Use DVector for large arrays.
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*/
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#include "os/memory.h"
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#include "error_macros.h"
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#include "safe_refcount.h"
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#include "sort.h"
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template<class T>
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class Vector {
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mutable void* _ptr;
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// internal helpers
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_FORCE_INLINE_ SafeRefCount* _get_refcount() const {
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if (!_ptr)
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return NULL;
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return reinterpret_cast<SafeRefCount*>(_ptr);
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}
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_FORCE_INLINE_ int* _get_size() const {
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if (!_ptr)
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return NULL;
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return reinterpret_cast<int*>(((uint8_t*)(_ptr))+sizeof(SafeRefCount));
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}
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_FORCE_INLINE_ T* _get_data() const {
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if (!_ptr)
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return NULL;
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return reinterpret_cast<T*>(((uint8_t*)(_ptr))+sizeof(SafeRefCount)+sizeof(int));
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}
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_FORCE_INLINE_ int _get_alloc_size(int p_elements) const {
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return nearest_power_of_2(p_elements*sizeof(T)+sizeof(SafeRefCount)+sizeof(int));
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}
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void _unref(void *p_data);
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void _copy_from(const Vector& p_from);
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void _copy_on_write();
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public:
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_FORCE_INLINE_ T *ptr() { if (!_ptr) return NULL; _copy_on_write(); return (T*)_get_data(); }
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_FORCE_INLINE_ const T *ptr() const { if (!_ptr) return NULL; return _get_data(); }
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_FORCE_INLINE_ void clear() { resize(0); }
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_FORCE_INLINE_ int size() const {
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if (!_ptr)
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return 0;
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else
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return *reinterpret_cast<int*>(((uint8_t*)(_ptr))+sizeof(SafeRefCount));
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}
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_FORCE_INLINE_ bool empty() const { return _ptr == 0; }
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Error resize(int p_size);
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bool push_back(T p_elem);
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void remove(int p_index);
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void erase(const T& p_val) { int idx = find(p_val); if (idx>=0) remove(idx); };
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void invert();
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template <class T_val>
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int find(const T_val& p_val) const;
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void set(int p_index,T p_elem);
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T get(int p_index) const;
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inline T& operator[](int p_index) {
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if (p_index<0 || p_index>=size()) {
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T& aux=*((T*)0); //nullreturn
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ERR_FAIL_COND_V(p_index<0 || p_index>=size(),aux);
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}
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_copy_on_write(); // wants to write, so copy on write.
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return _get_data()[p_index];
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}
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inline const T& operator[](int p_index) const {
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if (p_index<0 || p_index>=size()) {
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const T& aux=*((T*)0); //nullreturn
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ERR_FAIL_COND_V(p_index<0 || p_index>=size(),aux);
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}
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// no cow needed, since it's reading
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return _get_data()[p_index];
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}
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Error insert(int p_pos,const T& p_val);
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template<class C>
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void sort_custom() {
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int len = size();
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if (len==0)
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return;
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T *data = &operator[](0);
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SortArray<T,C> sorter;
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sorter.sort(data,len);
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}
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void sort() {
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sort_custom<_DefaultComparator<T> >();
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}
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void ordered_insert(const T& p_val) {
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int i;
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for (i=0; i<size(); i++) {
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if (p_val < operator[](i)) {
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break;
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};
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};
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insert(i, p_val);
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}
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void operator=(const Vector& p_from);
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Vector(const Vector& p_from);
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_FORCE_INLINE_ Vector();
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_FORCE_INLINE_ ~Vector();
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};
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template<class T>
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void Vector<T>::_unref(void *p_data) {
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if (!p_data)
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return;
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SafeRefCount *src = reinterpret_cast<SafeRefCount*>(p_data);
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if (!src->unref())
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return; // still in use
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// clean up
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int *count = (int*)(src+1);
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T *data = (T*)(count+1);
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for (int i=0;i<*count;i++) {
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// call destructors
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data[i].~T();
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}
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// free mem
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memfree(p_data);
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}
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template<class T>
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void Vector<T>::_copy_on_write() {
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if (!_ptr)
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return;
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if (_get_refcount()->get() > 1 ) {
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/* in use by more than me */
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SafeRefCount *src_new=(SafeRefCount *)memalloc(_get_alloc_size(*_get_size()));
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src_new->init();
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int * _size = (int*)(src_new+1);
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*_size=*_get_size();
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T*_data=(T*)(_size+1);
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// initialize new elements
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for (int i=0;i<*_size;i++) {
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memnew_placement(&_data[i], T( _get_data()[i] ) );
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}
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_unref(_ptr);
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_ptr=src_new;
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}
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}
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template<class T> template<class T_val>
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int Vector<T>::find(const T_val &p_val) const {
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int ret = -1;
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if (size() == 0)
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return ret;
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for (int i=0; i<size(); i++) {
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if (operator[](i) == p_val) {
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ret = i;
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break;
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};
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};
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return ret;
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};
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template<class T>
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Error Vector<T>::resize(int p_size) {
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ERR_FAIL_COND_V(p_size<0,ERR_INVALID_PARAMETER);
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if (p_size==size())
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return OK;
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if (p_size==0) {
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// wants to clean up
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_unref(_ptr);
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_ptr=NULL;
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return OK;
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}
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// possibly changing size, copy on write
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_copy_on_write();
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if (p_size>size()) {
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if (size()==0) {
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// alloc from scratch
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_ptr = (T*)memalloc(_get_alloc_size(p_size));
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ERR_FAIL_COND_V( !_ptr ,ERR_OUT_OF_MEMORY);
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_get_refcount()->init(); // init refcount
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*_get_size()=0; // init size (currently, none)
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} else {
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void *_ptrnew = (T*)memrealloc(_ptr,_get_alloc_size(p_size));
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ERR_FAIL_COND_V( !_ptrnew ,ERR_OUT_OF_MEMORY);
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_ptr=_ptrnew;
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}
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// construct the newly created elements
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T*elems = _get_data();
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for (int i=*_get_size();i<p_size;i++) {
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memnew_placement(&elems[i], T) ;
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}
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*_get_size()=p_size;
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} else if (p_size<size()) {
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// deinitialize no longer needed elements
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for (int i=p_size;i<*_get_size();i++) {
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T* t = &_get_data()[i];
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t->~T();
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}
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void *_ptrnew = (T*)memrealloc(_ptr,_get_alloc_size(p_size));
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ERR_FAIL_COND_V( !_ptrnew ,ERR_OUT_OF_MEMORY);
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_ptr=_ptrnew;
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*_get_size()=p_size;
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}
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return OK;
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}
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template<class T>
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void Vector<T>::invert() {
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for(int i=0;i<size()/2;i++) {
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SWAP( operator[](i), operator[](size()-i-1) );
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}
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}
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template<class T>
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void Vector<T>::set(int p_index,T p_elem) {
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operator[](p_index)=p_elem;
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}
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template<class T>
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T Vector<T>::get(int p_index) const {
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return operator[](p_index);
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}
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template<class T>
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bool Vector<T>::push_back(T p_elem) {
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Error err = resize(size()+1);
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ERR_FAIL_COND_V( err, true )
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set(size()-1,p_elem);
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return false;
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}
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template<class T>
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void Vector<T>::remove(int p_index) {
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ERR_FAIL_INDEX(p_index, size());
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T*p=ptr();
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int len=size();
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for (int i=p_index; i<len-1; i++) {
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p[i]=p[i+1];
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};
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resize(len-1);
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};
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template<class T>
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void Vector<T>::_copy_from(const Vector& p_from) {
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if (_ptr == p_from._ptr)
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return; // self assign, do nothing.
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_unref(_ptr);
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_ptr=NULL;
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if (!p_from._ptr)
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return; //nothing to do
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if (p_from._get_refcount()->ref()) // could reference
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_ptr=p_from._ptr;
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}
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template<class T>
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void Vector<T>::operator=(const Vector& p_from) {
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_copy_from(p_from);
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}
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template<class T>
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Error Vector<T>::insert(int p_pos,const T& p_val) {
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ERR_FAIL_INDEX_V(p_pos,size()+1,ERR_INVALID_PARAMETER);
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resize(size()+1);
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for (int i=(size()-1);i>p_pos;i--)
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set( i, get(i-1) );
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set( p_pos, p_val );
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return OK;
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}
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template<class T>
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Vector<T>::Vector(const Vector& p_from) {
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_ptr=NULL;
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_copy_from( p_from );
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}
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template<class T>
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Vector<T>::Vector() {
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_ptr=NULL;
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}
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template<class T>
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Vector<T>::~Vector() {
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_unref(_ptr);
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}
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#endif
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