winhttp: Use lock when attempting to send frame synchronously().

dlls/winhttp/request.c

@@ -3111,6 +3111,7 @@ HINTERNET WINAPI WinHttpWebSocketCompleteUpgrade( HINTERNET hrequest, DWORD_PTR
     socket->hdr.callback = request->hdr.callback;
     socket->hdr.notify_mask = request->hdr.notify_mask;
     socket->hdr.context = context;
+    InitializeSRWLock( &socket->send_lock );
 
     addref_object( &request->hdr );
     socket->request = request;
@@ -3391,6 +3392,7 @@ DWORD WINAPI WinHttpWebSocketSend( HINTERNET hsocket, WINHTTP_WEB_SOCKET_BUFFER_
             return ERROR_OUTOFMEMORY;
         }
 
+        AcquireSRWLockExclusive( &socket->send_lock );
         async_send = InterlockedIncrement( &socket->hdr.pending_sends ) > 1 || socket->hdr.recursion_count >= 3;
         if (!async_send)
         {
@@ -3419,10 +3421,11 @@ DWORD WINAPI WinHttpWebSocketSend( HINTERNET hsocket, WINHTTP_WEB_SOCKET_BUFFER_
                 free( s );
             }
         }
-        else
+        else InterlockedDecrement( &socket->hdr.pending_sends );
+        ReleaseSRWLockExclusive( &socket->send_lock );
+        if (!async_send)
         {
             TRACE("sent sync.\n");
-            InterlockedDecrement( &socket->hdr.pending_sends );
             free( s );
             socket_send_complete( socket, ret, type, len );
             ret = ERROR_SUCCESS;
@@ -3535,6 +3538,7 @@ static DWORD socket_send_pong( struct socket *socket )
 
         if (!(s = malloc( sizeof(*s) ))) return ERROR_OUTOFMEMORY;
 
+        AcquireSRWLockExclusive( &socket->send_lock );
         async_send = InterlockedIncrement( &socket->hdr.pending_sends ) > 1;
         if (!async_send)
         {
@@ -3563,6 +3567,7 @@ static DWORD socket_send_pong( struct socket *socket )
             InterlockedDecrement( &socket->hdr.pending_sends );
             free( s );
         }
+        ReleaseSRWLockExclusive( &socket->send_lock );
         return ret;
     }
     return send_frame( socket, SOCKET_OPCODE_PONG, 0, NULL, 0, TRUE, NULL );
@@ -3817,6 +3822,7 @@ static DWORD send_socket_shutdown( struct socket *socket, USHORT status, const v
 
         if (!(s = malloc( sizeof(*s) ))) return FALSE;
 
+        AcquireSRWLockExclusive( &socket->send_lock );
         async_send = InterlockedIncrement( &socket->hdr.pending_sends ) > 1 || socket->hdr.recursion_count >= 3;
         if (!async_send)
         {
@@ -3845,9 +3851,10 @@ static DWORD send_socket_shutdown( struct socket *socket, USHORT status, const v
                 free( s );
             }
         }
-        else
+        else InterlockedDecrement( &socket->hdr.pending_sends );
+        ReleaseSRWLockExclusive( &socket->send_lock );
+        if (!async_send)
         {
-            InterlockedDecrement( &socket->hdr.pending_sends );
             free( s );
             if (send_callback)
             {

dlls/winhttp/winhttp_private.h

@@ -259,6 +259,7 @@ struct socket
     unsigned int send_remaining_size;
     unsigned int bytes_in_send_frame_buffer;
     unsigned int client_buffer_offset;
+    SRWLOCK send_lock;
 };
 
 struct send_request