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![Rémi Verschelde](/assets/img/avatar_default.png)
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer with state-of-the-art rendering techniques tuned to work as low as middle end handheld devices - without compromising with the possibilities given for higher end desktop games of course. Great times ahead for the Godot community and the gamers that will play our games!
433 lines
9.7 KiB
C++
433 lines
9.7 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) 2007-2017 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 T* _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*>((uint8_t*)_ptr-sizeof(int)-sizeof(SafeRefCount));
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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(int));
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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*>(_ptr);
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}
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_FORCE_INLINE_ size_t _get_alloc_size(size_t p_elements) const {
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//return nearest_power_of_2_templated(p_elements*sizeof(T)+sizeof(SafeRefCount)+sizeof(int));
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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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_FORCE_INLINE_ bool _get_alloc_size_checked(size_t p_elements, size_t *out) const {
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#if defined(_add_overflow) && defined(_mul_overflow)
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size_t o;
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size_t p;
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if (_mul_overflow(p_elements, sizeof(T), &o)) return false;
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if (_add_overflow(o, sizeof(SafeRefCount)+sizeof(int), &p)) return false;
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*out = nearest_power_of_2(p);
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return true;
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#else
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// Speed is more important than correctness here, do the operations unchecked
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// and hope the best
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*out = _get_alloc_size(p_elements);
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return true;
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#endif
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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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int* size = _get_size();
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if (size)
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return *size;
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else
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return 0;
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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, int p_from=0) 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*>((uint8_t*)p_data-sizeof(int)-sizeof(SafeRefCount));
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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((uint8_t*)p_data-sizeof(int)-sizeof(SafeRefCount));
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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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void* mem_new = memalloc(_get_alloc_size(*_get_size()));
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SafeRefCount *src_new=(SafeRefCount *)mem_new;
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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=_data;
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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, int p_from) const {
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int ret = -1;
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if (p_from < 0 || size() == 0)
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return ret;
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for (int i=p_from; 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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size_t alloc_size;
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ERR_FAIL_COND_V(!_get_alloc_size_checked(p_size, &alloc_size), ERR_OUT_OF_MEMORY);
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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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void* ptr=memalloc(alloc_size);
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ERR_FAIL_COND_V( !ptr ,ERR_OUT_OF_MEMORY);
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_ptr=(T*)((uint8_t*)ptr+sizeof(int)+sizeof(SafeRefCount));
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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((uint8_t*)_ptr-sizeof(int)-sizeof(SafeRefCount), alloc_size);
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ERR_FAIL_COND_V( !_ptrnew ,ERR_OUT_OF_MEMORY);
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_ptr=(T*)((uint8_t*)_ptrnew+sizeof(int)+sizeof(SafeRefCount));
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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((uint8_t*)_ptr-sizeof(int)-sizeof(SafeRefCount), alloc_size);
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ERR_FAIL_COND_V( !_ptrnew ,ERR_OUT_OF_MEMORY);
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_ptr=(T*)((uint8_t*)_ptrnew+sizeof(int)+sizeof(SafeRefCount));
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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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