45 lines
1016 B
C++
45 lines
1016 B
C++
#include "lmdb-safe.hh"
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using namespace std;
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using namespace LMDBSafe;
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void checkLMDB(MDBEnv* env, MDBDbi dbi)
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{
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auto rotxn = env->getROTransaction();
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MDBOutVal data;
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if(!rotxn->get(dbi, "lmdb", data)) {
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cout<< "Outside RW transaction, found that lmdb = " << data.get<string_view>() <<endl;
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}
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else
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cout<<"Outside RW transaction, found nothing" << endl;
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}
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int main()
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{
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auto env = getMDBEnv("./database", 0, 0600);
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auto dbi = env->openDB("example", MDB_CREATE);
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auto txn = env->getRWTransaction();
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mdb_drop(*txn, dbi, 0);
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txn->put(dbi, "lmdb", "great");
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MDBOutVal data;
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if(!txn->get(dbi, "lmdb", data)) {
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cout<< "Within RW transaction, found that lmdb = " << data.get<string_view>() <<endl;
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}
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else
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cout<<"Found nothing" << endl;
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std::thread elsewhere(checkLMDB, env.get(), dbi);
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elsewhere.join();
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txn->commit();
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cout<<"Committed data"<<endl;
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checkLMDB(env.get(), dbi);
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txn = env->getRWTransaction();
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mdb_drop(*txn, dbi, 0);
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txn->commit();
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}
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