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#include "sqlite.hh"
#include "util.hh"
#include <sqlite3.h>
namespace nix {
[[noreturn]] void throwSQLiteError(sqlite3 * db, const format & f)
{
int err = sqlite3_errcode(db);
if (err == SQLITE_BUSY || err == SQLITE_PROTOCOL) {
if (err == SQLITE_PROTOCOL)
printMsg(lvlError, "warning: SQLite database is busy (SQLITE_PROTOCOL)");
else {
static bool warned = false;
if (!warned) {
printMsg(lvlError, "warning: SQLite database is busy");
warned = true;
}
}
/* Sleep for a while since retrying the transaction right away
is likely to fail again. */
#if HAVE_NANOSLEEP
struct timespec t;
t.tv_sec = 0;
t.tv_nsec = (random() % 100) * 1000 * 1000; /* <= 0.1s */
nanosleep(&t, 0);
#else
sleep(1);
#endif
throw SQLiteBusy(format("%1%: %2%") % f.str() % sqlite3_errmsg(db));
}
else
throw SQLiteError(format("%1%: %2%") % f.str() % sqlite3_errmsg(db));
}
SQLite::~SQLite()
{
try {
if (db && sqlite3_close(db) != SQLITE_OK)
throwSQLiteError(db, "closing database");
} catch (...) {
ignoreException();
}
}
void SQLiteStmt::create(sqlite3 * db, const string & s)
{
checkInterrupt();
assert(!stmt);
if (sqlite3_prepare_v2(db, s.c_str(), -1, &stmt, 0) != SQLITE_OK)
throwSQLiteError(db, "creating statement");
this->db = db;
}
void SQLiteStmt::reset()
{
assert(stmt);
/* Note: sqlite3_reset() returns the error code for the most
recent call to sqlite3_step(). So ignore it. */
sqlite3_reset(stmt);
curArg = 1;
}
SQLiteStmt::~SQLiteStmt()
{
try {
if (stmt && sqlite3_finalize(stmt) != SQLITE_OK)
throwSQLiteError(db, "finalizing statement");
} catch (...) {
ignoreException();
}
}
void SQLiteStmt::bind(const string & value)
{
if (sqlite3_bind_text(stmt, curArg++, value.c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
throwSQLiteError(db, "binding argument");
}
void SQLiteStmt::bind(int value)
{
if (sqlite3_bind_int(stmt, curArg++, value) != SQLITE_OK)
throwSQLiteError(db, "binding argument");
}
void SQLiteStmt::bind64(long long value)
{
if (sqlite3_bind_int64(stmt, curArg++, value) != SQLITE_OK)
throwSQLiteError(db, "binding argument");
}
void SQLiteStmt::bind()
{
if (sqlite3_bind_null(stmt, curArg++) != SQLITE_OK)
throwSQLiteError(db, "binding argument");
}
SQLiteStmtUse::SQLiteStmtUse(SQLiteStmt & stmt)
: stmt(stmt)
{
stmt.reset();
}
SQLiteStmtUse::~SQLiteStmtUse()
{
try {
stmt.reset();
} catch (...) {
ignoreException();
}
}
SQLiteTxn::SQLiteTxn(sqlite3 * db)
{
this->db = db;
if (sqlite3_exec(db, "begin;", 0, 0, 0) != SQLITE_OK)
throwSQLiteError(db, "starting transaction");
active = true;
}
void SQLiteTxn::commit()
{
if (sqlite3_exec(db, "commit;", 0, 0, 0) != SQLITE_OK)
throwSQLiteError(db, "committing transaction");
active = false;
}
SQLiteTxn::~SQLiteTxn()
{
try {
if (active && sqlite3_exec(db, "rollback;", 0, 0, 0) != SQLITE_OK)
throwSQLiteError(db, "aborting transaction");
} catch (...) {
ignoreException();
}
}
}
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