GitHub migration

1 files changed, 751 insertions, 0 deletions

diff --git a/updater/sql/mac/src/database.cc b/updater/sql/mac/src/database.cc
new file mode 100755
index 0000000..d495ce9
--- /dev/null
+++ b/updater/sql/mac/src/database.cc
@@ -0,0 +1,751 @@
+#include <cstring>
+#include <napi.h>
+
+#include "macros.h"
+#include "database.h"
+#include "statement.h"
+
+using namespace node_sqlite3;
+
+#if NAPI_VERSION < 6
+Napi::FunctionReference Database::constructor;
+#endif
+
+Napi::Object Database::Init(Napi::Env env, Napi::Object exports) {
+    Napi::HandleScope scope(env);
+    // declare napi_default_method here as it is only available in Node v14.12.0+
+    auto napi_default_method = static_cast<napi_property_attributes>(napi_writable | napi_configurable); 
+
+    auto t = DefineClass(env, "Database", {
+        InstanceMethod("close", &Database::Close, napi_default_method),
+        InstanceMethod("exec", &Database::Exec, napi_default_method),
+        InstanceMethod("wait", &Database::Wait, napi_default_method),
+        InstanceMethod("loadExtension", &Database::LoadExtension, napi_default_method),
+        InstanceMethod("serialize", &Database::Serialize, napi_default_method),
+        InstanceMethod("parallelize", &Database::Parallelize, napi_default_method),
+        InstanceMethod("configure", &Database::Configure, napi_default_method),
+        InstanceMethod("interrupt", &Database::Interrupt, napi_default_method),
+        InstanceAccessor("open", &Database::Open, nullptr)
+    });
+
+#if NAPI_VERSION < 6
+    constructor = Napi::Persistent(t);
+    constructor.SuppressDestruct();
+#else
+    Napi::FunctionReference* constructor = new Napi::FunctionReference();
+    *constructor = Napi::Persistent(t);
+    env.SetInstanceData<Napi::FunctionReference>(constructor);
+#endif
+
+    exports.Set("Database", t);
+    return exports;
+}
+
+void Database::Process() {
+    auto env = this->Env();
+    Napi::HandleScope scope(env);
+
+    if (!open && locked && !queue.empty()) {
+        EXCEPTION(Napi::String::New(env, "Database handle is closed"), SQLITE_MISUSE, exception);
+        Napi::Value argv[] = { exception };
+        bool called = false;
+
+        // Call all callbacks with the error object.
+        while (!queue.empty()) {
+            auto call = std::unique_ptr<Call>(queue.front());
+            queue.pop();
+            auto baton = std::unique_ptr<Baton>(call->baton);
+            Napi::Function cb = baton->callback.Value();
+            if (IS_FUNCTION(cb)) {
+                TRY_CATCH_CALL(this->Value(), cb, 1, argv);
+                called = true;
+            }
+        }
+
+        // When we couldn't call a callback function, emit an error on the
+        // Database object.
+        if (!called) {
+            Napi::Value info[] = { Napi::String::New(env, "error"), exception };
+            EMIT_EVENT(Value(), 2, info);
+        }
+        return;
+    }
+
+    while (open && (!locked || pending == 0) && !queue.empty()) {
+        Call *c = queue.front();
+
+        if (c->exclusive && pending > 0) {
+            break;
+        }
+
+        queue.pop();
+        std::unique_ptr<Call> call(c);
+        locked = call->exclusive;
+        call->callback(call->baton);
+
+        if (locked) break;
+    }
+}
+
+void Database::Schedule(Work_Callback callback, Baton* baton, bool exclusive) {
+    auto env = this->Env();
+    Napi::HandleScope scope(env);
+
+    if (!open && locked) {
+        EXCEPTION(Napi::String::New(env, "Database is closed"), SQLITE_MISUSE, exception);
+        Napi::Function cb = baton->callback.Value();
+        // We don't call the actual callback, so we have to make sure that
+        // the baton gets destroyed.
+        delete baton;
+        if (IS_FUNCTION(cb)) {
+            Napi::Value argv[] = { exception };
+            TRY_CATCH_CALL(Value(), cb, 1, argv);
+        }
+        else {
+            Napi::Value argv[] = { Napi::String::New(env, "error"), exception };
+            EMIT_EVENT(Value(), 2, argv);
+        }
+        return;
+    }
+
+    if (!open || ((locked || exclusive || serialize) && pending > 0)) {
+        queue.emplace(new Call(callback, baton, exclusive || serialize));
+    }
+    else {
+        locked = exclusive;
+        callback(baton);
+    }
+}
+
+Database::Database(const Napi::CallbackInfo& info) : Napi::ObjectWrap<Database>(info) {
+    auto env = info.Env();
+
+    if (info.Length() <= 0 || !info[0].IsString()) {
+        Napi::TypeError::New(env, "String expected").ThrowAsJavaScriptException();
+        return;
+    }
+    auto filename = info[0].As<Napi::String>().Utf8Value();
+
+    unsigned int pos = 1;
+
+    int mode;
+    if (info.Length() >= pos && info[pos].IsNumber() && OtherIsInt(info[pos].As<Napi::Number>())) {
+        mode = info[pos++].As<Napi::Number>().Int32Value();
+    }
+    else {
+        mode = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_FULLMUTEX;
+    }
+
+    Napi::Function callback;
+    if (info.Length() >= pos && info[pos].IsFunction()) {
+        callback = info[pos++].As<Napi::Function>();
+    }
+
+    info.This().As<Napi::Object>().DefineProperty(Napi::PropertyDescriptor::Value("filename", info[0].As<Napi::String>(), napi_default));
+    info.This().As<Napi::Object>().DefineProperty(Napi::PropertyDescriptor::Value("mode", Napi::Number::New(env, mode), napi_default));
+
+    // Start opening the database.
+    auto* baton = new OpenBaton(this, callback, filename.c_str(), mode);
+    Work_BeginOpen(baton);
+}
+
+void Database::Work_BeginOpen(Baton* baton) {
+    auto env = baton->db->Env();
+    CREATE_WORK("sqlite3.Database.Open", Work_Open, Work_AfterOpen);
+}
+
+void Database::Work_Open(napi_env e, void* data) {
+    auto* baton = static_cast<OpenBaton*>(data);
+    auto* db = baton->db;
+
+    baton->status = sqlite3_open_v2(
+        baton->filename.c_str(),
+        &db->_handle,
+        baton->mode,
+        NULL
+    );
+
+    if (baton->status != SQLITE_OK) {
+        baton->message = std::string(sqlite3_errmsg(db->_handle));
+        sqlite3_close(db->_handle);
+        db->_handle = NULL;
+    }
+    else {
+        // Set default database handle values.
+        sqlite3_busy_timeout(db->_handle, 1000);
+    }
+}
+
+void Database::Work_AfterOpen(napi_env e, napi_status status, void* data) {
+    std::unique_ptr<OpenBaton> baton(static_cast<OpenBaton*>(data));
+
+    auto* db = baton->db;
+
+    auto env = db->Env();
+    Napi::HandleScope scope(env);
+
+    Napi::Value argv[1];
+    if (baton->status != SQLITE_OK) {
+        EXCEPTION(Napi::String::New(env, baton->message.c_str()), baton->status, exception);
+        argv[0] = exception;
+    }
+    else {
+        db->open = true;
+        argv[0] = env.Null();
+    }
+
+    Napi::Function cb = baton->callback.Value();
+
+    if (IS_FUNCTION(cb)) {
+        TRY_CATCH_CALL(db->Value(), cb, 1, argv);
+    }
+    else if (!db->open) {
+        Napi::Value info[] = { Napi::String::New(env, "error"), argv[0] };
+        EMIT_EVENT(db->Value(), 2, info);
+    }
+
+    if (db->open) {
+        Napi::Value info[] = { Napi::String::New(env, "open") };
+        EMIT_EVENT(db->Value(), 1, info);
+        db->Process();
+    }
+}
+
+Napi::Value Database::Open(const Napi::CallbackInfo& info) {
+    auto env = this->Env();
+    auto* db = this;
+    return Napi::Boolean::New(env, db->open);
+}
+
+Napi::Value Database::Close(const Napi::CallbackInfo& info) {
+    auto env = info.Env();
+    auto* db = this;
+    OPTIONAL_ARGUMENT_FUNCTION(0, callback);
+
+   auto* baton = new Baton(db, callback);
+    db->Schedule(Work_BeginClose, baton, true);
+
+    return info.This();
+}
+
+void Database::Work_BeginClose(Baton* baton) {
+    assert(baton->db->locked);
+    assert(baton->db->open);
+    assert(baton->db->_handle);
+    assert(baton->db->pending == 0);
+
+    baton->db->pending++;
+    baton->db->RemoveCallbacks();
+    baton->db->closing = true;
+
+    auto env = baton->db->Env();
+    CREATE_WORK("sqlite3.Database.Close", Work_Close, Work_AfterClose);
+}
+
+void Database::Work_Close(napi_env e, void* data) {
+    auto* baton = static_cast<Baton*>(data);
+    auto* db = baton->db;
+
+    baton->status = sqlite3_close(db->_handle);
+
+    if (baton->status != SQLITE_OK) {
+        baton->message = std::string(sqlite3_errmsg(db->_handle));
+    }
+    else {
+        db->_handle = NULL;
+    }
+}
+
+void Database::Work_AfterClose(napi_env e, napi_status status, void* data) {
+    std::unique_ptr<Baton> baton(static_cast<Baton*>(data));
+
+    auto* db = baton->db;
+
+    auto env = db->Env();
+    Napi::HandleScope scope(env);
+
+    db->pending--;
+    db->closing = false;
+
+    Napi::Value argv[1];
+    if (baton->status != SQLITE_OK) {
+        EXCEPTION(Napi::String::New(env, baton->message.c_str()), baton->status, exception);
+        argv[0] = exception;
+    }
+    else {
+        db->open = false;
+        // Leave db->locked to indicate that this db object has reached
+        // the end of its life.
+        argv[0] = env.Null();
+    }
+
+    Napi::Function cb = baton->callback.Value();
+
+    // Fire callbacks.
+    if (IS_FUNCTION(cb)) {
+        TRY_CATCH_CALL(db->Value(), cb, 1, argv);
+    }
+    else if (db->open) {
+        Napi::Value info[] = { Napi::String::New(env, "error"), argv[0] };
+        EMIT_EVENT(db->Value(), 2, info);
+    }
+
+    if (!db->open) {
+        Napi::Value info[] = { Napi::String::New(env, "close") };
+        EMIT_EVENT(db->Value(), 1, info);
+        db->Process();
+    }
+}
+
+Napi::Value Database::Serialize(const Napi::CallbackInfo& info) {
+    auto env = this->Env();
+    auto* db = this;
+    OPTIONAL_ARGUMENT_FUNCTION(0, callback);
+
+    bool before = db->serialize;
+    db->serialize = true;
+
+    if (!callback.IsEmpty() && callback.IsFunction()) {
+        TRY_CATCH_CALL(info.This(), callback, 0, NULL, info.This());
+        db->serialize = before;
+    }
+
+    db->Process();
+
+    return info.This();
+}
+
+Napi::Value Database::Parallelize(const Napi::CallbackInfo& info) {
+    auto env = this->Env();
+    auto* db = this;
+    OPTIONAL_ARGUMENT_FUNCTION(0, callback);
+
+    auto before = db->serialize;
+    db->serialize = false;
+
+    if (!callback.IsEmpty() && callback.IsFunction()) {
+        TRY_CATCH_CALL(info.This(), callback, 0, NULL, info.This());
+        db->serialize = before;
+    }
+
+    db->Process();
+
+    return info.This();
+}
+
+Napi::Value Database::Configure(const Napi::CallbackInfo& info) {
+    auto env = this->Env();
+    auto* db = this;
+
+    REQUIRE_ARGUMENTS(2);
+
+    Napi::Function handle;
+    if (info[0].StrictEquals( Napi::String::New(env, "trace"))) {    
+       auto* baton = new Baton(db, handle);
+        db->Schedule(RegisterTraceCallback, baton);
+    }
+    else if (info[0].StrictEquals( Napi::String::New(env, "profile"))) {
+       auto* baton = new Baton(db, handle);
+        db->Schedule(RegisterProfileCallback, baton);
+    }
+    else if (info[0].StrictEquals( Napi::String::New(env, "busyTimeout"))) {
+        if (!info[1].IsNumber()) {
+            Napi::TypeError::New(env, "Value must be an integer").ThrowAsJavaScriptException();
+            return env.Null();
+        }
+       auto* baton = new Baton(db, handle);
+        baton->status = info[1].As<Napi::Number>().Int32Value();
+        db->Schedule(SetBusyTimeout, baton);
+    }
+    else if (info[0].StrictEquals( Napi::String::New(env, "limit"))) {
+        REQUIRE_ARGUMENTS(3);
+        if (!info[1].IsNumber()) {
+            Napi::TypeError::New(env, "limit id must be an integer").ThrowAsJavaScriptException();
+            return env.Null();
+        }
+        if (!info[2].IsNumber()) {
+            Napi::TypeError::New(env, "limit value must be an integer").ThrowAsJavaScriptException();
+            return env.Null();
+        }
+        int id = info[1].As<Napi::Number>().Int32Value();
+        int value = info[2].As<Napi::Number>().Int32Value();
+        Baton* baton = new LimitBaton(db, handle, id, value);
+        db->Schedule(SetLimit, baton);
+    }
+    else if (info[0].StrictEquals(Napi::String::New(env, "change"))) {
+       auto* baton = new Baton(db, handle);
+        db->Schedule(RegisterUpdateCallback, baton);
+    }
+    else {
+        Napi::TypeError::New(env, (StringConcat(
+#if V8_MAJOR_VERSION > 6
+            info.GetIsolate(),
+#endif
+            info[0].As<Napi::String>(),
+            Napi::String::New(env, " is not a valid configuration option")
+        )).Utf8Value().c_str()).ThrowAsJavaScriptException();
+        return env.Null();
+    }
+
+    db->Process();
+
+    return info.This();
+}
+
+Napi::Value Database::Interrupt(const Napi::CallbackInfo& info) {
+    auto env = this->Env();
+    auto* db = this;
+
+    if (!db->open) {
+        Napi::Error::New(env, "Database is not open").ThrowAsJavaScriptException();
+        return env.Null();
+    }
+
+    if (db->closing) {
+        Napi::Error::New(env, "Database is closing").ThrowAsJavaScriptException();
+        return env.Null();
+    }
+
+    sqlite3_interrupt(db->_handle);
+    return info.This();
+}
+
+void Database::SetBusyTimeout(Baton* b) {
+    auto baton = std::unique_ptr<Baton>(b);
+
+    assert(baton->db->open);
+    assert(baton->db->_handle);
+
+    // Abuse the status field for passing the timeout.
+    sqlite3_busy_timeout(baton->db->_handle, baton->status);
+}
+
+void Database::SetLimit(Baton* b) {
+    std::unique_ptr<LimitBaton> baton(static_cast<LimitBaton*>(b));
+
+    assert(baton->db->open);
+    assert(baton->db->_handle);
+
+    sqlite3_limit(baton->db->_handle, baton->id, baton->value);
+}
+
+void Database::RegisterTraceCallback(Baton* b) {
+    auto baton = std::unique_ptr<Baton>(b);
+    assert(baton->db->open);
+    assert(baton->db->_handle);
+    auto* db = baton->db;
+
+    if (db->debug_trace == NULL) {
+        // Add it.
+        db->debug_trace = new AsyncTrace(db, TraceCallback);
+        sqlite3_trace(db->_handle, TraceCallback, db);
+    }
+    else {
+        // Remove it.
+        sqlite3_trace(db->_handle, NULL, NULL);
+        db->debug_trace->finish();
+        db->debug_trace = NULL;
+    }
+}
+
+void Database::TraceCallback(void* db, const char* sql) {
+    // Note: This function is called in the thread pool.
+    // Note: Some queries, such as "EXPLAIN" queries, are not sent through this.
+    static_cast<Database*>(db)->debug_trace->send(new std::string(sql));
+}
+
+void Database::TraceCallback(Database* db, std::string* s) {
+    std::unique_ptr<std::string> sql(s);
+    // Note: This function is called in the main V8 thread.
+    auto env = db->Env();
+    Napi::HandleScope scope(env);
+
+    Napi::Value argv[] = {
+        Napi::String::New(env, "trace"),
+        Napi::String::New(env, sql->c_str())
+    };
+    EMIT_EVENT(db->Value(), 2, argv);
+}
+
+void Database::RegisterProfileCallback(Baton* b) {
+    auto baton = std::unique_ptr<Baton>(b);
+    assert(baton->db->open);
+    assert(baton->db->_handle);
+    auto* db = baton->db;
+
+    if (db->debug_profile == NULL) {
+        // Add it.
+        db->debug_profile = new AsyncProfile(db, ProfileCallback);
+        sqlite3_profile(db->_handle, ProfileCallback, db);
+    }
+    else {
+        // Remove it.
+        sqlite3_profile(db->_handle, NULL, NULL);
+        db->debug_profile->finish();
+        db->debug_profile = NULL;
+    }
+}
+
+void Database::ProfileCallback(void* db, const char* sql, sqlite3_uint64 nsecs) {
+    // Note: This function is called in the thread pool.
+    // Note: Some queries, such as "EXPLAIN" queries, are not sent through this.
+    auto* info = new ProfileInfo();
+    info->sql = std::string(sql);
+    info->nsecs = nsecs;
+    static_cast<Database*>(db)->debug_profile->send(info);
+}
+
+void Database::ProfileCallback(Database *db, ProfileInfo* i) {
+    auto info = std::unique_ptr<ProfileInfo>(i);
+    auto env = db->Env();
+    Napi::HandleScope scope(env);
+
+    Napi::Value argv[] = {
+        Napi::String::New(env, "profile"),
+        Napi::String::New(env, info->sql.c_str()),
+        Napi::Number::New(env, (double)info->nsecs / 1000000.0)
+    };
+    EMIT_EVENT(db->Value(), 3, argv);
+}
+
+void Database::RegisterUpdateCallback(Baton* b) {
+    auto baton = std::unique_ptr<Baton>(b);
+    assert(baton->db->open);
+    assert(baton->db->_handle);
+    auto* db = baton->db;
+
+    if (db->update_event == NULL) {
+        // Add it.
+        db->update_event = new AsyncUpdate(db, UpdateCallback);
+        sqlite3_update_hook(db->_handle, UpdateCallback, db);
+    }
+    else {
+        // Remove it.
+        sqlite3_update_hook(db->_handle, NULL, NULL);
+        db->update_event->finish();
+        db->update_event = NULL;
+    }
+}
+
+void Database::UpdateCallback(void* db, int type, const char* database,
+        const char* table, sqlite3_int64 rowid) {
+    // Note: This function is called in the thread pool.
+    // Note: Some queries, such as "EXPLAIN" queries, are not sent through this.
+    auto* info = new UpdateInfo();
+    info->type = type;
+    info->database = std::string(database);
+    info->table = std::string(table);
+    info->rowid = rowid;
+    static_cast<Database*>(db)->update_event->send(info);
+}
+
+void Database::UpdateCallback(Database *db, UpdateInfo* i) {
+    auto info = std::unique_ptr<UpdateInfo>(i);
+    auto env = db->Env();
+    Napi::HandleScope scope(env);
+
+    Napi::Value argv[] = {
+        Napi::String::New(env, "change"),
+        Napi::String::New(env, sqlite_authorizer_string(info->type)),
+        Napi::String::New(env, info->database.c_str()),
+        Napi::String::New(env, info->table.c_str()),
+        Napi::Number::New(env, info->rowid),
+    };
+    EMIT_EVENT(db->Value(), 5, argv);
+}
+
+Napi::Value Database::Exec(const Napi::CallbackInfo& info) {
+    auto env = this->Env();
+    auto* db = this;
+
+    REQUIRE_ARGUMENT_STRING(0, sql);
+    OPTIONAL_ARGUMENT_FUNCTION(1, callback);
+
+    Baton* baton = new ExecBaton(db, callback, sql.c_str());
+    db->Schedule(Work_BeginExec, baton, true);
+
+    return info.This();
+}
+
+void Database::Work_BeginExec(Baton* baton) {
+    assert(baton->db->locked);
+    assert(baton->db->open);
+    assert(baton->db->_handle);
+    assert(baton->db->pending == 0);
+    baton->db->pending++;
+
+    auto env = baton->db->Env();
+    CREATE_WORK("sqlite3.Database.Exec", Work_Exec, Work_AfterExec);
+}
+
+void Database::Work_Exec(napi_env e, void* data) {
+    auto* baton = static_cast<ExecBaton*>(data);
+
+    char* message = NULL;
+    baton->status = sqlite3_exec(
+        baton->db->_handle,
+        baton->sql.c_str(),
+        NULL,
+        NULL,
+        &message
+    );
+
+    if (baton->status != SQLITE_OK && message != NULL) {
+        baton->message = std::string(message);
+        sqlite3_free(message);
+    }
+}
+
+void Database::Work_AfterExec(napi_env e, napi_status status, void* data) {
+    std::unique_ptr<ExecBaton> baton(static_cast<ExecBaton*>(data));
+
+    auto* db = baton->db;
+    db->pending--;
+
+    auto env = db->Env();
+    Napi::HandleScope scope(env);
+
+    Napi::Function cb = baton->callback.Value();
+
+    if (baton->status != SQLITE_OK) {
+        EXCEPTION(Napi::String::New(env, baton->message.c_str()), baton->status, exception);
+
+        if (IS_FUNCTION(cb)) {
+            Napi::Value argv[] = { exception };
+            TRY_CATCH_CALL(db->Value(), cb, 1, argv);
+        }
+        else {
+            Napi::Value info[] = { Napi::String::New(env, "error"), exception };
+            EMIT_EVENT(db->Value(), 2, info);
+        }
+    }
+    else if (IS_FUNCTION(cb)) {
+        Napi::Value argv[] = { env.Null() };
+        TRY_CATCH_CALL(db->Value(), cb, 1, argv);
+    }
+
+    db->Process();
+}
+
+Napi::Value Database::Wait(const Napi::CallbackInfo& info) {
+    auto env = info.Env();
+    auto* db = this;
+
+    OPTIONAL_ARGUMENT_FUNCTION(0, callback);
+
+   auto* baton = new Baton(db, callback);
+    db->Schedule(Work_Wait, baton, true);
+
+    return info.This();
+}
+
+void Database::Work_Wait(Baton* b) {
+    auto baton = std::unique_ptr<Baton>(b);
+
+    auto env = baton->db->Env();
+    Napi::HandleScope scope(env);
+
+    assert(baton->db->locked);
+    assert(baton->db->open);
+    assert(baton->db->_handle);
+    assert(baton->db->pending == 0);
+
+    Napi::Function cb = baton->callback.Value();
+    if (IS_FUNCTION(cb)) {
+        Napi::Value argv[] = { env.Null() };
+        TRY_CATCH_CALL(baton->db->Value(), cb, 1, argv);
+    }
+
+    baton->db->Process();
+}
+
+Napi::Value Database::LoadExtension(const Napi::CallbackInfo& info) {
+    auto env = this->Env();
+    auto* db = this;
+
+    REQUIRE_ARGUMENT_STRING(0, filename);
+    OPTIONAL_ARGUMENT_FUNCTION(1, callback);
+
+    Baton* baton = new LoadExtensionBaton(db, callback, filename.c_str());
+    db->Schedule(Work_BeginLoadExtension, baton, true);
+
+    return info.This();
+}
+
+void Database::Work_BeginLoadExtension(Baton* baton) {
+    assert(baton->db->locked);
+    assert(baton->db->open);
+    assert(baton->db->_handle);
+    assert(baton->db->pending == 0);
+    baton->db->pending++;
+
+    auto env = baton->db->Env();
+    CREATE_WORK("sqlite3.Database.LoadExtension", Work_LoadExtension, Work_AfterLoadExtension);
+}
+
+void Database::Work_LoadExtension(napi_env e, void* data) {
+    auto* baton = static_cast<LoadExtensionBaton*>(data);
+
+    sqlite3_enable_load_extension(baton->db->_handle, 1);
+
+    char* message = NULL;
+    baton->status = sqlite3_load_extension(
+        baton->db->_handle,
+        baton->filename.c_str(),
+        0,
+        &message
+    );
+
+    sqlite3_enable_load_extension(baton->db->_handle, 0);
+
+    if (baton->status != SQLITE_OK && message != NULL) {
+        baton->message = std::string(message);
+        sqlite3_free(message);
+    }
+}
+
+void Database::Work_AfterLoadExtension(napi_env e, napi_status status, void* data) {
+    std::unique_ptr<LoadExtensionBaton> baton(static_cast<LoadExtensionBaton*>(data));
+
+    auto* db = baton->db;
+    db->pending--;
+
+    auto env = db->Env();
+    Napi::HandleScope scope(env);
+
+    Napi::Function cb = baton->callback.Value();
+
+    if (baton->status != SQLITE_OK) {
+        EXCEPTION(Napi::String::New(env, baton->message.c_str()), baton->status, exception);
+
+        if (IS_FUNCTION(cb)) {
+            Napi::Value argv[] = { exception };
+            TRY_CATCH_CALL(db->Value(), cb, 1, argv);
+        }
+        else {
+            Napi::Value info[] = { Napi::String::New(env, "error"), exception };
+            EMIT_EVENT(db->Value(), 2, info);
+        }
+    }
+    else if (IS_FUNCTION(cb)) {
+        Napi::Value argv[] = { env.Null() };
+        TRY_CATCH_CALL(db->Value(), cb, 1, argv);
+    }
+
+    db->Process();
+}
+
+void Database::RemoveCallbacks() {
+    if (debug_trace) {
+        debug_trace->finish();
+        debug_trace = NULL;
+    }
+    if (debug_profile) {
+        debug_profile->finish();
+        debug_profile = NULL;
+    }
+    if (update_event) {
+        update_event->finish();
+        update_event = NULL;
+    }
+}