latest SDK

pfc/memalign.h

@@ -0,0 +1,137 @@
+#pragma once
+
+#ifndef _MSC_VER
+#include <stdlib.h>
+#endif
+
+namespace pfc {
+	template<unsigned alignBytes = 16>
+	class mem_block_aligned {
+	public:
+		typedef mem_block_aligned<alignBytes> self_t;
+		mem_block_aligned() : m_ptr(), m_size() {}
+
+		void * ptr() {return m_ptr;}
+		const void * ptr() const {return m_ptr;}
+		void * get_ptr() {return m_ptr;}
+		const void * get_ptr() const {return m_ptr;}
+		size_t size() const {return m_size;}
+		size_t get_size() const {return m_size;}
+
+		void resize(size_t s) {
+			if (s == m_size) {
+				// nothing to do
+			} else if (s == 0) {
+				_free(m_ptr);
+				m_ptr = NULL;
+			} else {
+				void * ptr;
+#ifdef _MSC_VER
+				if (m_ptr == NULL) ptr = _aligned_malloc(s, alignBytes);
+				else ptr = _aligned_realloc(m_ptr, s, alignBytes);
+				if ( ptr == NULL ) throw std::bad_alloc();
+#else
+#ifdef __ANDROID__
+                if ((ptr = memalign( alignBytes, s )) == NULL) throw std::bad_alloc();
+#else
+                if (posix_memalign( &ptr, alignBytes, s ) < 0) throw std::bad_alloc();
+#endif
+                if (m_ptr != NULL) {
+                    memcpy( ptr, m_ptr, min_t<size_t>( m_size, s ) );
+                    _free( m_ptr );
+                }
+#endif
+				m_ptr = ptr;
+			}
+			m_size = s;
+		}
+		void set_size(size_t s) {resize(s);}
+		
+		~mem_block_aligned() {
+            _free(m_ptr);
+        }
+
+		self_t const & operator=(self_t const & other) {
+			assign(other);
+			return *this;
+		}
+		mem_block_aligned(self_t const & other) : m_ptr(), m_size() {
+			assign(other);
+		}
+		void assign(self_t const & other) {
+			resize(other.size());
+			memcpy(ptr(), other.ptr(), size());
+		}
+		mem_block_aligned(self_t && other) {
+			m_ptr = other.m_ptr;
+			m_size = other.m_size;
+			other.m_ptr = NULL; other.m_size = 0;
+		}
+		self_t const & operator=(self_t && other) {
+			_free(m_ptr);
+			m_ptr = other.m_ptr;
+			m_size = other.m_size;
+			other.m_ptr = NULL; other.m_size = 0;
+			return *this;
+		}
+        
+	private:
+        static void _free(void * ptr) {
+#ifdef _MSC_VER
+            _aligned_free(ptr);
+#else
+            free(ptr);
+#endif
+        }
+        
+		void * m_ptr;
+		size_t m_size;
+	};
+
+	template<typename obj_t, unsigned alignBytes = 16>
+	class mem_block_aligned_t {
+	public:
+		typedef mem_block_aligned_t<obj_t, alignBytes> self_t;
+		void resize(size_t s) { m.resize( multiply_guarded(s, sizeof(obj_t) ) ); }
+		void set_size(size_t s) {resize(s);}
+		size_t size() const { return m.size() / sizeof(obj_t); }
+		size_t get_size() const {return size();}
+		obj_t * ptr() { return reinterpret_cast<obj_t*>(m.ptr()); }
+		const obj_t * ptr() const { return reinterpret_cast<const obj_t*>(m.ptr()); }
+		obj_t * get_ptr() { return reinterpret_cast<obj_t*>(m.ptr()); }
+		const obj_t * get_ptr() const { return reinterpret_cast<const obj_t*>(m.ptr()); }
+		mem_block_aligned_t() {}
+	private:
+		mem_block_aligned<alignBytes> m;
+	};
+
+	template<typename obj_t, unsigned alignBytes = 16>
+	class mem_block_aligned_incremental_t {
+	public:
+		typedef mem_block_aligned_t<obj_t, alignBytes> self_t;
+		
+		void resize(size_t s) {
+			if (s > m.size()) {
+				m.resize( multiply_guarded<size_t>(s, 3) / 2 );				
+			}
+			m_size = s;
+		}
+		void set_size(size_t s) {resize(s);}
+		
+		size_t size() const { return m_size; }
+		size_t get_size() const {return m_size; }
+
+		obj_t * ptr() { return m.ptr(); }
+		const obj_t * ptr() const { return m.ptr(); }
+		obj_t * get_ptr() { return m.ptr(); }
+		const obj_t * get_ptr() const { return m.ptr(); }
+		mem_block_aligned_incremental_t() : m_size() {}
+		mem_block_aligned_incremental_t(self_t const & other) : m(other.m), m_size(other.m_size) {}
+		mem_block_aligned_incremental_t(self_t && other) : m(std::move(other.m)), m_size(other.m_size) { other.m_size = 0; }
+		self_t const & operator=(self_t const & other) {m = other.m; m_size = other.m_size; return *this;}
+		self_t const & operator=(self_t && other) {m = std::move(other.m); m_size = other.m_size; other.m_size = 0; return *this;}
+	private:
+		mem_block_aligned_t<obj_t, alignBytes> m;
+		size_t m_size;
+	};
+}