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feat(library/pos_info_provider): store raw pointers at pos_info table

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This is imprecise, but we avoid memory retention issue.
This commit is contained in:
Leonardo de Moura 2018-06-08 10:44:16 -07:00
parent 818170d780
commit ad892ca97c
1 changed files with 6 additions and 10 deletions
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16
src/library/pos_info_provider.cpp
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@ -7,37 +7,33 @@ Author: Leonardo de Moura
#include "library/pos_info_provider.h"
namespace lean {
struct expr_ptr_eq {
bool operator()(expr const & e1, expr const & e2) const { return e1.raw() == e2.raw(); }
};
typedef std::unordered_map<expr, pos_info, expr_hash, expr_ptr_eq> pos_table;
typedef std::unordered_map<void *, pos_info> pos_table;
static pos_table * g_pos_table;
static mutex * g_pos_table_mutex;
expr save_pos(expr const & e, pos_info const & pos) {
lock_guard<mutex> _(*g_pos_table_mutex);
g_pos_table->insert(mk_pair(e, pos));
g_pos_table->insert(mk_pair(e.raw(), pos));
return e;
}
expr copy_pos(expr const & src, expr const & dest) {
lock_guard<mutex> _(*g_pos_table_mutex);
auto it = g_pos_table->find(src);
auto it = g_pos_table->find(src.raw());
if (it != g_pos_table->end())
g_pos_table->insert(mk_pair(dest, it->second));
g_pos_table->insert(mk_pair(dest.raw(), it->second));
return dest;
}
void erase_pos(expr const & e) {
lock_guard<mutex> _(*g_pos_table_mutex);
g_pos_table->erase(e);
g_pos_table->erase(e.raw());
}
optional<pos_info> get_pos(expr const & e) {
lock_guard<mutex> _(*g_pos_table_mutex);
auto it = g_pos_table->find(e);
auto it = g_pos_table->find(e.raw());
if (it != g_pos_table->end())
return optional<pos_info>(it->second);
return optional<pos_info>();