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cfa7c733db
* fixing #4670 Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * init Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * arrays Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * arrays Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * arrays Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * na Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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small_object_allocator.h
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Abstract:
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Small object allocator.
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Author:
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Nikolaj bjorner (nbjorner) 2007-08-06.
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Revision History:
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Leonardo de Moura (leonardo) 2011-04-27
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Rewrote/Simplified the allocator
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--*/
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#pragma once
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#include "util/machine.h"
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#include "util/debug.h"
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class small_object_allocator {
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static const unsigned CHUNK_SIZE = (8192 - sizeof(void*)*2);
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static const unsigned SMALL_OBJ_SIZE = 256;
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static const unsigned NUM_SLOTS = (SMALL_OBJ_SIZE >> PTR_ALIGNMENT);
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struct chunk {
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chunk* m_next{ nullptr };
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char* m_curr{ nullptr };
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char m_data[CHUNK_SIZE];
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chunk():m_curr(m_data) {}
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};
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chunk * m_chunks[NUM_SLOTS];
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void * m_free_list[NUM_SLOTS];
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size_t m_alloc_size;
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#ifdef Z3DEBUG
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char const * m_id;
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#endif
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public:
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small_object_allocator(char const * id = "unknown");
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~small_object_allocator();
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void reset();
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void * allocate(size_t size);
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void deallocate(size_t size, void * p);
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size_t get_allocation_size() const { return m_alloc_size; }
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size_t get_wasted_size() const;
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size_t get_num_free_objs() const;
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void consolidate();
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};
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inline void * operator new(size_t s, small_object_allocator & r) { return r.allocate(s); }
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inline void * operator new[](size_t s, small_object_allocator & r) { return r.allocate(s); }
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inline void operator delete(void * p, small_object_allocator & r) { UNREACHABLE(); }
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inline void operator delete[](void * p, small_object_allocator & r) { UNREACHABLE(); }
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