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crate::ix!();
pub struct BerkeleyEnvironment {
db_env_init: bool,
mock_db: bool,
/**
| Don't change into fs::path, as that
| can result in shutdown problems/crashes
| caused by a static initialized internal
| pointer.
|
*/
str_path: String,
dbenv: Box<libdb::Env>,
databases: HashMap<String,Amo<BerkeleyDatabase>>,
fileids: HashMap<String,WalletDatabaseFileId>,
/**
| In C++, we had std::condition_variable_any
| The condition_variable_any class is
| a generalization of
| std::condition_variable. Whereas
| std::condition_variable works only on
| std::unique_lock<std::mutex>,
| condition_variable_any can operate on any lock
| that meets the BasicLockable requirements.
*/
db_in_use: std::sync::Condvar,
}
impl Drop for BerkeleyEnvironment {
fn drop(&mut self) {
todo!();
/*
LOCK(cs_db);
g_dbenvs.erase(strPath);
Close();
*/
}
}
impl Default for BerkeleyEnvironment {
/**
| Construct an in-memory mock Berkeley
| environment for testing
|
*/
fn default() -> Self {
todo!();
/*
Reset();
LogPrint(BCLog::WALLETDB, "BerkeleyEnvironment::MakeMock\n");
dbenv->set_cachesize(1, 0, 1);
dbenv->set_lg_bsize(10485760 * 4);
dbenv->set_lg_max(10485760);
dbenv->set_lk_max_locks(10000);
dbenv->set_lk_max_objects(10000);
dbenv->set_flags(DB_AUTO_COMMIT, 1);
dbenv->log_set_config(DB_LOG_IN_MEMORY, 1);
int ret = dbenv->open(nullptr,
DB_CREATE |
DB_INIT_LOCK |
DB_INIT_LOG |
DB_INIT_MPOOL |
DB_INIT_TXN |
DB_THREAD |
DB_PRIVATE,
S_IRUSR | S_IWUSR);
if (ret > 0) {
throw std::runtime_error(strprintf("BerkeleyEnvironment::MakeMock: Error %d opening database environment.", ret));
}
fDbEnvInit = true;
fMockDb = true;
*/
}
}
impl BerkeleyEnvironment {
pub fn is_mock(&self) -> bool {
todo!();
/*
return fMockDb;
*/
}
pub fn is_initialized(&self) -> bool {
todo!();
/*
return fDbEnvInit;
*/
}
pub fn directory(&self) -> Box<Path> {
todo!();
/*
return fs::PathFromString(strPath);
*/
}
pub fn txn_begin(&mut self, flags: Option<i32>) -> *mut libdb::DbTxn {
let flags: i32 = flags.unwrap_or(
libdb::DB_TXN_WRITE_NOSYNC);
todo!();
/*
DbTxn* ptxn = nullptr;
int ret = dbenv->txn_begin(nullptr, &ptxn, flags);
if (!ptxn || ret != 0)
return nullptr;
return ptxn;
*/
}
pub fn close_db(&mut self, str_file: &String) {
todo!();
/*
{
LOCK(cs_db);
auto it = m_databases.find(strFile);
assert(it != m_databases.end());
BerkeleyDatabase& database = it->second.get();
if (database.m_db) {
// Close the database handle
database.m_db->close(0);
database.m_db.reset();
}
}
*/
}
pub fn reload_db_env(&mut self) {
todo!();
/*
// Make sure that no Db's are in use
AssertLockNotHeld(cs_db);
std::unique_lock<RecursiveMutex> lock(cs_db);
m_db_in_use.wait(lock, [this](){
for (auto& db : m_databases) {
if (db.second.get().m_refcount > 0) return false;
}
return true;
});
std::vector<std::string> filenames;
for (auto it : m_databases) {
filenames.push_back(it.first);
}
// Close the individual Db's
for (const std::string& filename : filenames) {
CloseDb(filename);
}
// Reset the environment
Flush(true); // This will flush and close the environment
Reset();
bilingual_str open_err;
Open(open_err);
*/
}
pub fn close(&mut self) {
todo!();
/*
if (!fDbEnvInit)
return;
fDbEnvInit = false;
for (auto& db : m_databases) {
BerkeleyDatabase& database = db.second.get();
assert(database.m_refcount <= 0);
if (database.m_db) {
database.m_db->close(0);
database.m_db.reset();
}
}
FILE* error_file = nullptr;
dbenv->get_errfile(&error_file);
int ret = dbenv->close(0);
if (ret != 0)
LogPrintf("BerkeleyEnvironment::Close: Error %d closing database environment: %s\n", ret, DbEnv::strerror(ret));
if (!fMockDb)
DbEnv((u_int32_t)0).remove(strPath.c_str(), 0);
if (error_file) fclose(error_file);
UnlockDirectory(fs::PathFromString(strPath), ".walletlock");
*/
}
pub fn reset(&mut self) {
todo!();
/*
dbenv.reset(new DbEnv(DB_CXX_NO_EXCEPTIONS));
fDbEnvInit = false;
fMockDb = false;
*/
}
pub fn new(dir_path: Box<&Path>) -> Self {
todo!();
/*
: strPath(fs::PathToString(dir_path))
Reset();
*/
}
pub fn open(&mut self, err: &mut BilingualStr) -> bool {
todo!();
/*
if (fDbEnvInit) {
return true;
}
fs::path pathIn = fs::PathFromString(strPath);
TryCreateDirectories(pathIn);
if (!LockDirectory(pathIn, ".walletlock")) {
LogPrintf("Cannot obtain a lock on wallet directory %s. Another instance may be using it.\n", strPath);
err = strprintf(_("Error initializing wallet database environment %s!"), fs::quoted(fs::PathToString(Directory())));
return false;
}
fs::path pathLogDir = pathIn / "database";
TryCreateDirectories(pathLogDir);
fs::path pathErrorFile = pathIn / "db.log";
LogPrintf("BerkeleyEnvironment::Open: LogDir=%s ErrorFile=%s\n", fs::PathToString(pathLogDir), fs::PathToString(pathErrorFile));
unsigned int nEnvFlags = 0;
if (gArgs.GetBoolArg("-privdb", DEFAULT_WALLET_PRIVDB))
nEnvFlags |= DB_PRIVATE;
dbenv->set_lg_dir(fs::PathToString(pathLogDir).c_str());
dbenv->set_cachesize(0, 0x100000, 1); // 1 MiB should be enough for just the wallet
dbenv->set_lg_bsize(0x10000);
dbenv->set_lg_max(1048576);
dbenv->set_lk_max_locks(40000);
dbenv->set_lk_max_objects(40000);
dbenv->set_errfile(fsbridge::fopen(pathErrorFile, "a")); /// debug
dbenv->set_flags(DB_AUTO_COMMIT, 1);
dbenv->set_flags(DB_TXN_WRITE_NOSYNC, 1);
dbenv->log_set_config(DB_LOG_AUTO_REMOVE, 1);
int ret = dbenv->open(strPath.c_str(),
DB_CREATE |
DB_INIT_LOCK |
DB_INIT_LOG |
DB_INIT_MPOOL |
DB_INIT_TXN |
DB_THREAD |
DB_RECOVER |
nEnvFlags,
S_IRUSR | S_IWUSR);
if (ret != 0) {
LogPrintf("BerkeleyEnvironment::Open: Error %d opening database environment: %s\n", ret, DbEnv::strerror(ret));
int ret2 = dbenv->close(0);
if (ret2 != 0) {
LogPrintf("BerkeleyEnvironment::Open: Error %d closing failed database environment: %s\n", ret2, DbEnv::strerror(ret2));
}
Reset();
err = strprintf(_("Error initializing wallet database environment %s!"), fs::quoted(fs::PathToString(Directory())));
if (ret == DB_RUNRECOVERY) {
err += Untranslated(" ") + _("This error could occur if this wallet was not shutdown cleanly and was last loaded using a build with a newer version of Berkeley DB. If so, please use the software that last loaded this wallet");
}
return false;
}
fDbEnvInit = true;
fMockDb = false;
return true;
*/
}
pub fn checkpointlsn(&mut self, str_file: &String) {
todo!();
/*
dbenv->txn_checkpoint(0, 0, 0);
if (fMockDb)
return;
dbenv->lsn_reset(strFile.c_str(), 0);
*/
}
pub fn flush(&mut self, shutdown: bool) {
todo!();
/*
int64_t nStart = GetTimeMillis();
// Flush log data to the actual data file on all files that are not in use
LogPrint(BCLog::WALLETDB, "BerkeleyEnvironment::Flush: [%s] Flush(%s)%s\n", strPath, fShutdown ? "true" : "false", fDbEnvInit ? "" : " database not started");
if (!fDbEnvInit)
return;
{
LOCK(cs_db);
bool no_dbs_accessed = true;
for (auto& db_it : m_databases) {
std::string strFile = db_it.first;
int nRefCount = db_it.second.get().m_refcount;
if (nRefCount < 0) continue;
LogPrint(BCLog::WALLETDB, "BerkeleyEnvironment::Flush: Flushing %s (refcount = %d)...\n", strFile, nRefCount);
if (nRefCount == 0) {
// Move log data to the dat file
CloseDb(strFile);
LogPrint(BCLog::WALLETDB, "BerkeleyEnvironment::Flush: %s checkpoint\n", strFile);
dbenv->txn_checkpoint(0, 0, 0);
LogPrint(BCLog::WALLETDB, "BerkeleyEnvironment::Flush: %s detach\n", strFile);
if (!fMockDb)
dbenv->lsn_reset(strFile.c_str(), 0);
LogPrint(BCLog::WALLETDB, "BerkeleyEnvironment::Flush: %s closed\n", strFile);
nRefCount = -1;
} else {
no_dbs_accessed = false;
}
}
LogPrint(BCLog::WALLETDB, "BerkeleyEnvironment::Flush: Flush(%s)%s took %15dms\n", fShutdown ? "true" : "false", fDbEnvInit ? "" : " database not started", GetTimeMillis() - nStart);
if (fShutdown) {
char** listp;
if (no_dbs_accessed) {
dbenv->log_archive(&listp, DB_ARCH_REMOVE);
Close();
if (!fMockDb) {
fs::remove_all(fs::PathFromString(strPath) / "database");
}
}
}
}
*/
}
}