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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
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Leonardo de Moura 2012-10-02 11:35:25 -07:00
parent 3f9edad676
commit e9eab22e5c
1186 changed files with 381859 additions and 0 deletions
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lib/lru_cache.h Normal file
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/*++
Copyright (c) 2011 Microsoft Corporation
Module Name:
lru_cache.h
Abstract:
expr -> expr LRU cache
Author:
Leonardo (leonardo) 2011-04-12
Notes:
--*/
#ifndef _LRU_CACHE_H_
#define _LRU_CACHE_H_
#include"ast.h"
// #define LRU_CACHE_STATISTICS
#ifdef LRU_CACHE_STATISTICS
#define LCS_CODE(CODE) { CODE }
#else
#define LCS_CODE(CODE)
#endif
class lru_cache {
struct cell {
expr * m_key;
expr * m_value;
cell * m_prev;
cell * m_next;
#ifdef LRU_CACHE_STATISTICS
unsigned m_hits;
unsigned m_birthday;
#endif
};
ast_manager & m_manager;
cell * m_table;
cell * m_head;
unsigned m_size;
unsigned m_max_size;
unsigned m_capacity;
unsigned m_num_deleted;
#ifdef LRU_CACHE_STATISTICS
unsigned m_time;
#endif
static cell * allocate(unsigned capacity);
static void deallocate(cell * table);
static cell * copy_table(cell * old_head, cell * new_table, unsigned new_capacity);
void del_least_used();
void add_front(cell * c);
void move_front(cell * c);
void expand_table();
void remove_deleted();
void init();
void dec_refs();
public:
lru_cache(ast_manager & m);
lru_cache(ast_manager & m, unsigned max_size);
~lru_cache();
void insert(expr * k, expr * v);
expr * find(expr * k);
void reset();
void cleanup();
unsigned size() const { return m_size; }
unsigned capacity() const { return m_capacity; }
bool empty() const { return m_size == 0; }
bool check_invariant() const;
};
#endif