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fixing #1948

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-11-21 13:48:48 -08:00
parent 8590876d18
commit 0c1408b30e
5 changed files with 88 additions and 43 deletions
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15
src/util/chashtable.h
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@ -31,6 +31,7 @@ Revision History:
#include "util/memory_manager.h"
#include "util/debug.h"
#include "util/trace.h"
#include "util/tptr.h"
#ifdef Z3DEBUG
#include "util/hashtable.h"
#endif
@ -54,8 +55,9 @@ protected:
cell * m_next;
T m_data;
cell():m_next(reinterpret_cast<cell*>(1)) {}
bool is_free() const { return m_next == reinterpret_cast<cell*>(1); }
void mark_free() { m_next = reinterpret_cast<cell*>(1); }
bool is_free() const { return GET_TAG(m_next) == 1; }
void mark_free() { m_next = TAG(cell*, m_next, 1); }
void unmark_free() { m_next = UNTAG(cell*, m_next); }
};
cell * m_table; // array of cells.
@ -70,6 +72,7 @@ protected:
#endif
cell * m_next_cell;
cell * m_free_cell;
cell * m_tofree_cell;
unsigned get_hash(T const & d) const { return HashProc::operator()(d); }
bool equals(T const & e1, T const & e2) const { return EqProc::operator()(e1, e2); }
@ -171,6 +174,7 @@ protected:
m_slots = new_slots;
m_next_cell = next_cell;
m_free_cell = nullptr;
m_tofree_cell = nullptr;
CASSERT("chashtable", check_invariant());
return;
}
@ -204,6 +208,12 @@ protected:
m_free_cell = c;
}
void push_recycle_cell(cell* c) {
SASSERT(c < m_table + m_capacity);
c->m_next = m_tofree_cell;
m_tofree_cell = c;
}
void init(unsigned slots, unsigned cellar) {
m_capacity = slots + cellar;
m_table = alloc_table(m_capacity);
@ -212,6 +222,7 @@ protected:
m_size = 0;
m_next_cell = m_table + slots;
m_free_cell = nullptr;
m_tofree_cell = nullptr;
}
public: