138 lines
3.9 KiB
C++
138 lines
3.9 KiB
C++
#pragma once
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#ifndef _MSC_VER
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#include <stdlib.h>
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#endif
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namespace pfc {
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template<unsigned alignBytes = 16>
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class mem_block_aligned {
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public:
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typedef mem_block_aligned<alignBytes> self_t;
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mem_block_aligned() : m_ptr(), m_size() {}
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void * ptr() {return m_ptr;}
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const void * ptr() const {return m_ptr;}
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void * get_ptr() {return m_ptr;}
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const void * get_ptr() const {return m_ptr;}
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size_t size() const {return m_size;}
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size_t get_size() const {return m_size;}
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void resize(size_t s) {
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if (s == m_size) {
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// nothing to do
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} else if (s == 0) {
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_free(m_ptr);
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m_ptr = NULL;
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} else {
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void * ptr;
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#ifdef _MSC_VER
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if (m_ptr == NULL) ptr = _aligned_malloc(s, alignBytes);
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else ptr = _aligned_realloc(m_ptr, s, alignBytes);
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if ( ptr == NULL ) throw std::bad_alloc();
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#else
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#ifdef __ANDROID__
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if ((ptr = memalign( alignBytes, s )) == NULL) throw std::bad_alloc();
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#else
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if (posix_memalign( &ptr, alignBytes, s ) < 0) throw std::bad_alloc();
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#endif
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if (m_ptr != NULL) {
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memcpy( ptr, m_ptr, min_t<size_t>( m_size, s ) );
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_free( m_ptr );
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}
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#endif
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m_ptr = ptr;
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}
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m_size = s;
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}
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void set_size(size_t s) {resize(s);}
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~mem_block_aligned() {
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_free(m_ptr);
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}
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self_t const & operator=(self_t const & other) {
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assign(other);
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return *this;
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}
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mem_block_aligned(self_t const & other) : m_ptr(), m_size() {
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assign(other);
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}
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void assign(self_t const & other) {
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resize(other.size());
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memcpy(ptr(), other.ptr(), size());
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}
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mem_block_aligned(self_t && other) {
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m_ptr = other.m_ptr;
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m_size = other.m_size;
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other.m_ptr = NULL; other.m_size = 0;
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}
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self_t const & operator=(self_t && other) {
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_free(m_ptr);
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m_ptr = other.m_ptr;
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m_size = other.m_size;
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other.m_ptr = NULL; other.m_size = 0;
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return *this;
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}
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private:
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static void _free(void * ptr) {
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#ifdef _MSC_VER
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_aligned_free(ptr);
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#else
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free(ptr);
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#endif
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}
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void * m_ptr;
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size_t m_size;
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};
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template<typename obj_t, unsigned alignBytes = 16>
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class mem_block_aligned_t {
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public:
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typedef mem_block_aligned_t<obj_t, alignBytes> self_t;
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void resize(size_t s) { m.resize( multiply_guarded(s, sizeof(obj_t) ) ); }
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void set_size(size_t s) {resize(s);}
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size_t size() const { return m.size() / sizeof(obj_t); }
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size_t get_size() const {return size();}
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obj_t * ptr() { return reinterpret_cast<obj_t*>(m.ptr()); }
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const obj_t * ptr() const { return reinterpret_cast<const obj_t*>(m.ptr()); }
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obj_t * get_ptr() { return reinterpret_cast<obj_t*>(m.ptr()); }
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const obj_t * get_ptr() const { return reinterpret_cast<const obj_t*>(m.ptr()); }
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mem_block_aligned_t() {}
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private:
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mem_block_aligned<alignBytes> m;
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};
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template<typename obj_t, unsigned alignBytes = 16>
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class mem_block_aligned_incremental_t {
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public:
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typedef mem_block_aligned_t<obj_t, alignBytes> self_t;
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void resize(size_t s) {
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if (s > m.size()) {
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m.resize( multiply_guarded<size_t>(s, 3) / 2 );
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}
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m_size = s;
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}
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void set_size(size_t s) {resize(s);}
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size_t size() const { return m_size; }
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size_t get_size() const {return m_size; }
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obj_t * ptr() { return m.ptr(); }
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const obj_t * ptr() const { return m.ptr(); }
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obj_t * get_ptr() { return m.ptr(); }
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const obj_t * get_ptr() const { return m.ptr(); }
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mem_block_aligned_incremental_t() : m_size() {}
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mem_block_aligned_incremental_t(self_t const & other) : m(other.m), m_size(other.m_size) {}
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mem_block_aligned_incremental_t(self_t && other) : m(std::move(other.m)), m_size(other.m_size) { other.m_size = 0; }
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self_t const & operator=(self_t const & other) {m = other.m; m_size = other.m_size; return *this;}
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self_t const & operator=(self_t && other) {m = std::move(other.m); m_size = other.m_size; other.m_size = 0; return *this;}
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private:
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mem_block_aligned_t<obj_t, alignBytes> m;
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size_t m_size;
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};
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}
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