+/**
+ * Try to fill the input buffer for a server with as much
+ * data as possible.
+ *
+ * @param ptr the server to pack
+ */
+static bool repack_input_buffer(memcached_server_write_instance_st ptr)
+{
+ if (ptr->read_ptr != ptr->read_buffer)
+ {
+ /* Move all of the data to the beginning of the buffer so
+ ** that we can fit more data into the buffer...
+ */
+ memmove(ptr->read_buffer, ptr->read_ptr, ptr->read_buffer_length);
+ ptr->read_ptr= ptr->read_buffer;
+ ptr->read_data_length= ptr->read_buffer_length;
+ }
+
+ /* There is room in the buffer, try to fill it! */
+ if (ptr->read_buffer_length != MEMCACHED_MAX_BUFFER)
+ {
+ do {
+ /* Just try a single read to grab what's available */
+ ssize_t nr= recv(ptr->fd,
+ ptr->read_ptr + ptr->read_data_length,
+ MEMCACHED_MAX_BUFFER - ptr->read_data_length,
+ MSG_DONTWAIT);
+
+ switch (nr)
+ {
+ case SOCKET_ERROR:
+ {
+ switch (get_socket_errno())
+ {
+ case EINTR:
+ continue;
+
+#if EWOULDBLOCK != EAGAIN
+ case EWOULDBLOCK:
+#endif
+ case EAGAIN:
+#ifdef TARGET_OS_LINUX
+ case ERESTART:
+#endif
+ break; // No IO is fine, we can just move on
+
+ default:
+ memcached_set_errno(*ptr, get_socket_errno(), MEMCACHED_AT);
+ }
+ }
+ break;
+
+ case 0: // Shutdown on the socket has occurred
+ {
+ memcached_set_error(*ptr, MEMCACHED_CONNECTION_FAILURE, MEMCACHED_AT);
+ }
+ break;
+
+ default:
+ {
+ ptr->read_data_length+= size_t(nr);
+ ptr->read_buffer_length+= size_t(nr);
+ return true;
+ }
+ break;
+ }
+ } while (0);
+ }
+ return false;
+}
+
+/**
+ * If the we have callbacks connected to this server structure
+ * we may start process the input queue and fire the callbacks
+ * for the incomming messages. This function is _only_ called
+ * when the input buffer is full, so that we _know_ that we have
+ * at least _one_ message to process.
+ *
+ * @param ptr the server to star processing iput messages for
+ * @return true if we processed anything, false otherwise
+ */
+static bool process_input_buffer(memcached_server_write_instance_st ptr)
+{
+ /*
+ ** We might be able to process some of the response messages if we
+ ** have a callback set up
+ */
+ if (ptr->root->callbacks != NULL)
+ {
+ /*
+ * We might have responses... try to read them out and fire
+ * callbacks
+ */
+ memcached_callback_st cb= *ptr->root->callbacks;
+
+ memcached_set_processing_input((memcached_st *)ptr->root, true);
+
+ char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
+ memcached_st *root= (memcached_st *)ptr->root;
+ memcached_return_t error= memcached_response(ptr, buffer, sizeof(buffer), &root->result);
+
+ memcached_set_processing_input(root, false);
+
+ if (error == MEMCACHED_SUCCESS)
+ {
+ for (unsigned int x= 0; x < cb.number_of_callback; x++)
+ {
+ error= (*cb.callback[x])(ptr->root, &root->result, cb.context);
+ if (error != MEMCACHED_SUCCESS)
+ break;
+ }
+
+ /* @todo what should I do with the error message??? */
+ }
+ /* @todo what should I do with other error messages?? */
+ return true;
+ }
+
+ return false;
+}