mirror of
https://github.com/LMMS/lmms.git
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846ca178f5
Resolves some inexplicable linking errors on Windows. Saves us from working around incomplete CMake support of object libraries.
135 lines
3.5 KiB
C++
135 lines
3.5 KiB
C++
/*
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* Memory.h
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*
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* Copyright (c) 2017 Lukas W <lukaswhl/at/gmail.com>
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* Copyright (c) 2014 Simon Symeonidis <lethaljellybean/at/gmail/com>
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* Copyright (c) 2014 Vesa Kivimäki
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* Copyright (c) 2004-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef MEMORY_MANAGER_H
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#define MEMORY_MANAGER_H
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#include <cstddef>
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#include <vector>
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#include "lmms_export.h"
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#include "NiftyCounter.h"
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class LMMS_EXPORT MemoryManager
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{
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public:
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static void * alloc( size_t size );
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static void free( void * ptr );
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private:
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static void initialize();
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static void deinitialize();
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static void thread_initialize();
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static void thread_deinitialize();
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public:
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typedef NiftyCounter<MemoryManager::initialize, MemoryManager::deinitialize> MmCounter;
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typedef NiftyCounterTL<MemoryManager::thread_initialize, MemoryManager::thread_deinitialize> ThreadGuard;
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};
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static MemoryManager::MmCounter _mm_counter;
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static thread_local MemoryManager::MmCounter _mm_thread_counter;
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template<typename T>
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class LMMS_EXPORT MmAllocator
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{
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public:
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MmAllocator() = default;
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template< class U > MmAllocator( const MmAllocator<U>& other ) {}
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typedef T value_type;
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template<class U> struct rebind { typedef MmAllocator<U> other; };
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T* allocate( std::size_t n )
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{
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return reinterpret_cast<T*>( MemoryManager::alloc( sizeof(T) * n ) );
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}
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void deallocate( T* p, std::size_t )
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{
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MemoryManager::free( p );
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}
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typedef std::vector<T, MmAllocator<T> > vector;
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};
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class _AlignedAllocator_Base
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{
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protected:
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void* alloc_impl( size_t alignment, size_t size );
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void dealloc_impl( void* p );
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};
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template<typename T>
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class AlignedAllocator : _AlignedAllocator_Base
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{
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public:
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typedef T value_type;
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template<class U> struct rebind { typedef AlignedAllocator<U> other; };
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AlignedAllocator( size_t alignment = 16 )
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: alignment(alignment) {}
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T* allocate( std::size_t n )
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{
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return reinterpret_cast<T*>( alloc_impl( alignment, sizeof(T) * n ) );
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}
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void deallocate( T* p, std::size_t )
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{
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dealloc_impl( p );
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}
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private:
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std::size_t alignment;
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};
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#define MM_OPERATORS \
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public: \
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static void * operator new ( size_t size ) \
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{ \
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return MemoryManager::alloc( size ); \
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} \
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static void * operator new[] ( size_t size ) \
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{ \
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return MemoryManager::alloc( size ); \
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} \
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static void operator delete ( void * ptr ) \
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{ \
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MemoryManager::free( ptr ); \
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} \
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static void operator delete[] ( void * ptr ) \
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{ \
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MemoryManager::free( ptr ); \
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}
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// for use in cases where overriding new/delete isn't a possibility
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#define MM_ALLOC( type, count ) reinterpret_cast<type*>( MemoryManager::alloc( sizeof( type ) * count ) )
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// and just for symmetry...
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#define MM_FREE( ptr ) MemoryManager::free( ptr )
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#endif
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