diff options
Diffstat (limited to 'nuttx/graphics/nxmu/nx_eventhandler.c')
| -rw-r--r-- | nuttx/graphics/nxmu/nx_eventhandler.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/nuttx/graphics/nxmu/nx_eventhandler.c b/nuttx/graphics/nxmu/nx_eventhandler.c new file mode 100644 index 000000000..f89565b01 --- /dev/null +++ b/nuttx/graphics/nxmu/nx_eventhandler.c @@ -0,0 +1,224 @@ +/**************************************************************************** + * graphics/nxmu/nx_eventhandler.c + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <stdlib.h> +#include <mqueue.h> +#include <assert.h> +#include <errno.h> +#include <debug.h> + +#include <nuttx/nx.h> +#include "nxfe.h" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nx_connected + * + * Description: + * The server has completed the connection and is ready. + * + ****************************************************************************/ + +static inline void nx_connected(FAR struct nxfe_conn_s *conn) +{ + DEBUGASSERT(conn->state == NX_CLISTATE_NOTCONNECTED); + conn->state = NX_CLISTATE_CONNECTED; +} + +/**************************************************************************** + * Name: nx_disconnected + ****************************************************************************/ + +static inline void nx_disconnected(FAR struct nxfe_conn_s *conn) +{ + /* Close the server and client MQs */ + + (void)mq_close(conn->cwrmq); + (void)mq_close(conn->crdmq); + + /* And free the client structure */ + + free(conn); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nx_eventhandler + * + * Description: + * The client code must call this function periodically to process + * incoming messages from the server. + * + * Input Parameters: + * handle - the handle returned by nx_connect + * + * Return: + * >0: The length of the message received in msgbuffer + * 0: No message was received + * <0: An error occurred and errno has been set appropriately + * + * Of particular interest, it will return errno == EHOSTDOWN when the + * server is disconnected. After that event, the handle can not longer + * be used. + * + ****************************************************************************/ + +int nx_eventhandler(NXHANDLE handle) +{ + FAR struct nxfe_conn_s *conn = (FAR struct nxfe_conn_s *)handle; + struct nxsvrmsg_s *msg; + ubyte buffer[NX_MXCLIMSGLEN]; + int nbytes; + + /* Get the next message from our incoming message queue */ + + do + { + nbytes = mq_receive(conn->crdmq, buffer, NX_MXCLIMSGLEN, 0); + if (nbytes < 0) + { + /* EINTR is not an error. The wait was interrupted by a signal and + * we just need to try reading again. + */ + + if (errno != EINTR) + { + if (errno == EAGAIN) + { + /* EAGAIN is not an error. It occurs because the MQ is opened with + * O_NONBLOCK and there is no message available now. + */ + + return OK; + } + else + { + gdbg("mq_receive failed: %d\n", errno); + return ERROR; + } + } + } + } + while (nbytes < 0); + + DEBUGASSERT(nbytes >= sizeof(struct nxclimsg_s)); + + /* Dispatch the message appropriately */ + + msg = (struct nxsvrmsg_s *)buffer; + switch (msg->msgid) + { + case NX_SVRMSG_CONNECT: + nx_connected(conn); + break; + + case NX_SVRMSG_DISCONNECT: + nx_disconnected(conn); + errno = EHOSTDOWN; + return ERROR; + + case NX_CLIMSG_REDRAW: + if (conn->cb->redraw) + { + FAR struct nxclimsg_redraw_s *redraw = (FAR struct nxclimsg_redraw_s *)buffer; + conn->cb->redraw((NXWINDOW)redraw->wnd, &redraw->rect, redraw->more); + } + break; + + case NX_CLIMSG_NEWPOSITION: + if (conn->cb->position) + { + FAR struct nxclimsg_newposition_s *postn = (FAR struct nxclimsg_newposition_s *)buffer; + conn->cb->position((NXWINDOW)postn->wnd, &postn->size, &postn->pos); + } + break; + +#ifdef CONFIG_NX_KBD + case NX_CLIMSG_MOUSEIN: + if (conn->cb->mousein) + { + FAR struct nxclimsg_mousein_s *mouse = (FAR struct nxclimsg_mousein_s *)buffer; + conn->cb->mousein((NXWINDOW)mouse->wnd, &mouse->pos, mouse->buttons); + } + break; +#endif + +#ifdef CONFIG_NX_KBD + case NX_CLIMSG_KBDIN: + if (conn->cb->kbdin) + { + FAR struct nxclimsg_kbdin_s *kbd = (FAR struct nxclimsg_kbdin_s *)buffer; + conn->cb->kbdin((NXWINDOW)kbd->wnd, kbd->nch, kbd->ch); + } + break; +#endif + + default: + gdbg("Unrecogized message opcode: %d\n", (FAR struct nxsvrmsg_s *)buffer->msgid); + break; + } + + return OK; +} + |