receiver refactoring

client/client.go

@@ -3,18 +3,14 @@ package client
 import (
 	"context"
 	"errors"
-	"log"
 	"sync"
-	"sync/atomic"
 	"time"
 )
 
-var clients = &sync.Map{}
-
 type Client struct {
 	jsonClient     *JsonClient
 	extraGenerator ExtraGenerator
-	catcher        chan *Response
+	responses      chan *Response
 	listenerStore  *listenerStore
 	catchersStore  *sync.Map
 	updatesTimeout time.Duration
@@ -35,12 +31,6 @@ func WithCatchTimeout(timeout time.Duration) Option {
 	}
 }
 
-func WithUpdatesTimeout(timeout time.Duration) Option {
-	return func(client *Client) {
-		client.updatesTimeout = timeout
-	}
-}
-
 func WithProxy(req *AddProxyRequest) Option {
 	return func(client *Client) {
 		client.AddProxy(req)
@@ -54,27 +44,23 @@ func WithLogVerbosity(req *SetLogVerbosityLevelRequest) Option {
 }
 
 func NewClient(authorizationStateHandler AuthorizationStateHandler, options ...Option) (*Client, error) {
-	catchersListener := make(chan *Response, 1000)
-
 	client := &Client{
 		jsonClient:    NewJsonClient(),
-		catcher:       catchersListener,
+		responses:     make(chan *Response, 1000),
 		listenerStore: newListenerStore(),
 		catchersStore: &sync.Map{},
 	}
 
-	clients.Store(client.jsonClient.id, client)
-
 	client.extraGenerator = UuidV4Generator()
 	client.catchTimeout = 60 * time.Second
-	client.updatesTimeout = 60 * time.Second
 
 	for _, option := range options {
 		option(client)
 	}
 
-	go receive(client)
-	go client.catch(catchersListener)
+	tdlibInstance.addClient(client)
+
+	go client.receiver()
 
 	err := Authorize(client, authorizationStateHandler)
 	if err != nil {
@@ -84,31 +70,16 @@ func NewClient(authorizationStateHandler AuthorizationStateHandler, options ...O
 	return client, nil
 }
 
-var alreadyRunning uint32
-
-func receive(client *Client) {
-	if atomic.LoadUint32(&alreadyRunning) != 0 {
-		return
-	}
-	atomic.StoreUint32(&alreadyRunning, 1)
-
-	for {
-		resp, err := Receive(client.updatesTimeout)
-		if err != nil {
-			continue
+func (client *Client) receiver() {
+	for response := range client.responses {
+		if response.Extra != "" {
+			value, ok := client.catchersStore.Load(response.Extra)
+			if ok {
+				value.(chan *Response) <- response
+			}
 		}
 
-		value, ok := clients.Load(resp.ClientId)
-		if !ok {
-			log.Printf("Response with wrong clientId: %d", resp.ClientId)
-			continue
-		}
-
-		client := value.(*Client)
-
-		client.catcher <- resp
-
-		typ, err := UnmarshalType(resp.Data)
+		typ, err := UnmarshalType(response.Data)
 		if err != nil {
 			continue
 		}
@@ -127,17 +98,6 @@ func receive(client *Client) {
 	}
 }
 
-func (client *Client) catch(updates chan *Response) {
-	for update := range updates {
-		if update.Extra != "" {
-			value, ok := client.catchersStore.Load(update.Extra)
-			if ok {
-				value.(chan *Response) <- update
-			}
-		}
-	}
-}
-
 func (client *Client) Send(req Request) (*Response, error) {
 	req.Extra = client.extraGenerator()
 

client/tdlib.go

@@ -10,11 +10,93 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"log"
 	"strconv"
+	"sync"
 	"time"
 	"unsafe"
 )
 
+var tdlibInstance *tdlib
+
+func init() {
+	tdlibInstance = &tdlib{
+		timeout: 60 * time.Second,
+		clients: map[int]*Client{},
+	}
+}
+
+type tdlib struct {
+	once    sync.Once
+	timeout time.Duration
+	mu      sync.Mutex
+	clients map[int]*Client
+}
+
+func (instance *tdlib) addClient(client *Client) {
+	instance.mu.Lock()
+	defer instance.mu.Unlock()
+
+	instance.clients[client.jsonClient.id] = client
+
+	instance.once.Do(func() {
+		go instance.receiver()
+	})
+}
+
+func (instance *tdlib) getClient(id int) (*Client, error) {
+	instance.mu.Lock()
+	defer instance.mu.Unlock()
+
+	client, ok := instance.clients[id]
+	if !ok {
+		return nil, fmt.Errorf("client [id: %d] does not exist", id)
+	}
+
+	return client, nil
+}
+
+func (instance *tdlib) receiver() {
+	for {
+		resp, err := instance.receive(instance.timeout)
+		if err != nil {
+			continue
+		}
+
+		client, err := instance.getClient(resp.ClientId)
+		if err != nil {
+			log.Print(err)
+			continue
+		}
+
+		client.responses <- resp
+	}
+}
+
+// Receives incoming updates and request responses from the TDLib client. May be called from any thread, but
+// shouldn't be called simultaneously from two different threads.
+// Returned pointer will be deallocated by TDLib during next call to td_json_client_receive or td_json_client_execute
+// in the same thread, so it can't be used after that.
+func (instance *tdlib) receive(timeout time.Duration) (*Response, error) {
+	result := C.td_receive(C.double(float64(timeout) / float64(time.Second)))
+	if result == nil {
+		return nil, errors.New("update receiving timeout")
+	}
+
+	data := []byte(C.GoString(result))
+
+	var resp Response
+
+	err := json.Unmarshal(data, &resp)
+	if err != nil {
+		return nil, err
+	}
+
+	resp.Data = data
+
+	return &resp, nil
+}
+
 type JsonClient struct {
 	id int
 }
@@ -35,30 +117,6 @@ func (jsonClient *JsonClient) Send(req Request) {
 	C.td_send(C.int(jsonClient.id), query)
 }
 
-// Receives incoming updates and request responses from the TDLib client. May be called from any thread, but
-// shouldn't be called simultaneously from two different threads.
-// Returned pointer will be deallocated by TDLib during next call to td_json_client_receive or td_json_client_execute
-// in the same thread, so it can't be used after that.
-func Receive(timeout time.Duration) (*Response, error) {
-	result := C.td_receive(C.double(float64(timeout) / float64(time.Second)))
-	if result == nil {
-		return nil, errors.New("update receiving timeout")
-	}
-
-	data := []byte(C.GoString(result))
-
-	var resp Response
-
-	err := json.Unmarshal(data, &resp)
-	if err != nil {
-		return nil, err
-	}
-
-	resp.Data = data
-
-	return &resp, nil
-}
-
 // Synchronously executes TDLib request. May be called from any thread.
 // Only a few requests can be executed synchronously.
 // Returned pointer will be deallocated by TDLib during next call to td_json_client_receive or td_json_client_execute