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use external stack instead to manage memory

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2014-01-15 20:26:48 -08:00
parent ff54b3d92b
commit c6a9dae00a
1 changed files with 9 additions and 7 deletions
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16
src/opt/weighted_maxsat.cpp
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@ -47,6 +47,7 @@ namespace smt {
bool_var m_min_cost_bv; // max cost Boolean variable
vector<rational> m_rweights; // weights of theory variables.
scoped_mpz_vector m_zweights;
scoped_mpz_vector m_old_values;
svector<theory_var> m_costs; // set of asserted theory variables
svector<theory_var> m_cost_save; // set of asserted theory variables
rational m_rcost; // current sum of asserted costs
@ -70,6 +71,7 @@ namespace smt {
m_min_cost_atom(m),
m_min_cost_atoms(m),
m_zweights(m_mpz),
m_old_values(m_mpz),
m_zcost(m_mpz),
m_zmin_cost(m_mpz),
m_propagate(false),
@ -189,23 +191,23 @@ namespace smt {
class numeral_trail : public trail<context> {
typedef scoped_mpz T;
T & m_value;
T* m_old_value;
scoped_mpz_vector& m_old_values;
// numeral_trail(numeral_trail const& nt);
public:
numeral_trail(T & value):
numeral_trail(T & value, scoped_mpz_vector& old):
m_value(value),
m_old_value(alloc(T, value)) {
m_old_values(old) {
old.push_back(value);
}
virtual ~numeral_trail() {
}
virtual void undo(context & ctx) {
m_value = *m_old_value;
dealloc(m_old_value);
m_old_value = 0;
m_value = m_old_values.back();
m_old_values.pop_back();
}
};
@ -217,7 +219,7 @@ namespace smt {
theory_var tv = m_bool2var[v];
if (m_assigned[tv]) return;
mpz const& w = m_zweights[tv];
ctx.push_trail(numeral_trail(m_zcost));
ctx.push_trail(numeral_trail(m_zcost, m_old_values));
ctx.push_trail(push_back_vector<context, svector<theory_var> >(m_costs));
ctx.push_trail(value_trail<context, bool>(m_assigned[tv]));
m_zcost += w;