static Nan::Persistent<FunctionTemplate> constructor_template;

static NAN_MODULE_INIT(Init);

static inline bool HasInstance(Local<Value> val) {

Nan::HandleScope scope;

if (!val->IsObject()) return false;

Local<Object> obj = val.As<Object>();

return Nan::New(constructor_template)->HasInstance(obj);

}

struct Baton {

uv_work_t request;

Database* db;

Nan::Persistent<Function> callback;

int status;

std::string message;

Baton(Database* db_, Local<Function> cb_) :

db(db_), status(SQLITE_OK) {

db->Ref();

request.data = this;

callback.Reset(cb_);

}

virtual ~Baton() {

db->Unref();

callback.Reset();

}

};

struct OpenBaton : Baton {

std::string filename;

int mode;

OpenBaton(Database* db_, Local<Function> cb_, const char* filename_, int mode_) :

Baton(db_, cb_), filename(filename_), mode(mode_) {}

};

struct ExecBaton : Baton {

std::string sql;

ExecBaton(Database* db_, Local<Function> cb_, const char* sql_) :

Baton(db_, cb_), sql(sql_) {}

};

struct LoadExtensionBaton : Baton {

std::string filename;

LoadExtensionBaton(Database* db_, Local<Function> cb_, const char* filename_) :

Baton(db_, cb_), filename(filename_) {}

};

typedef void (*Work_Callback)(Baton* baton);

struct Call {

Call(Work_Callback cb_, Baton* baton_, bool exclusive_ = false) :

callback(cb_), exclusive(exclusive_), baton(baton_) {};

Work_Callback callback;

bool exclusive;

Baton* baton;

};

struct ProfileInfo {

std::string sql;

sqlite3_int64 nsecs;

};

struct UpdateInfo {

int type;

std::string database;

std::string table;

sqlite3_int64 rowid;

};

bool IsOpen() { return open; }

bool IsLocked() { return locked; }

typedef Async<std::string, Database> AsyncTrace;

typedef Async<ProfileInfo, Database> AsyncProfile;

typedef Async<UpdateInfo, Database> AsyncUpdate;

friend class Statement;

friend class Backup;

Database() : Nan::ObjectWrap(),

_handle(NULL),

open(false),

closing(false),

locked(false),

pending(0),

serialize(false),

debug_trace(NULL),

debug_profile(NULL),

update_event(NULL) {

}

~Database() {

RemoveCallbacks();

sqlite3_close(_handle);

_handle = NULL;

open = false;

}

static NAN_METHOD(New);

static void Work_BeginOpen(Baton* baton);

static void Work_Open(uv_work_t* req);

static void Work_AfterOpen(uv_work_t* req);

static NAN_GETTER(OpenGetter);

void Schedule(Work_Callback callback, Baton* baton, bool exclusive = false);

void Process();

static NAN_METHOD(Exec);

static void Work_BeginExec(Baton* baton);

static void Work_Exec(uv_work_t* req);

static void Work_AfterExec(uv_work_t* req);

static NAN_METHOD(Wait);

static void Work_Wait(Baton* baton);

static NAN_METHOD(Close);

static void Work_BeginClose(Baton* baton);

static void Work_Close(uv_work_t* req);

static void Work_AfterClose(uv_work_t* req);

static NAN_METHOD(LoadExtension);

static void Work_BeginLoadExtension(Baton* baton);

static void Work_LoadExtension(uv_work_t* req);

static void Work_AfterLoadExtension(uv_work_t* req);

static NAN_METHOD(Serialize);

static NAN_METHOD(Parallelize);

static NAN_METHOD(Configure);

static NAN_METHOD(Interrupt);

static void SetBusyTimeout(Baton* baton);

static void RegisterTraceCallback(Baton* baton);

static void TraceCallback(void* db, const char* sql);

static void TraceCallback(Database* db, std::string* sql);

static void RegisterProfileCallback(Baton* baton);

static void ProfileCallback(void* db, const char* sql, sqlite3_uint64 nsecs);

static void ProfileCallback(Database* db, ProfileInfo* info);

static void RegisterUpdateCallback(Baton* baton);

static void UpdateCallback(void* db, int type, const char* database, const char* table, sqlite3_int64 rowid);

static void UpdateCallback(Database* db, UpdateInfo* info);

void RemoveCallbacks();

sqlite3* _handle;

bool open;

bool closing;

bool locked;

unsigned int pending;

bool serialize;

std::queue<Call*> queue;

AsyncTrace* debug_trace;

AsyncProfile* debug_profile;

AsyncUpdate* update_event;