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nuttx/graphics/nxmu/nxmu_server.c
Xiang Xiao 6a3c2aded6 Fix wait loop and void cast (#24) 
* Simplify EINTR/ECANCEL error handling

1. Add semaphore uninterruptible wait function
2 .Replace semaphore wait loop with a single uninterruptible wait
3. Replace all sem_xxx to nxsem_xxx

* Unify the void cast usage

1. Remove void cast for function because many place ignore the returned value witout cast
2. Replace void cast for variable with UNUSED macro
2020-01-02 10:54:43 -06:00

590 lines
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/****************************************************************************
* graphics/nxmu/nxmu_server.c
*
* Copyright (C) 2008-2012, 2017, 2019 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <stdint.h>
#include <stdio.h>
#include <string.h>
#include <semaphore.h>
#include <mqueue.h>
#include <fcntl.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/mqueue.h>
#include <nuttx/nx/nx.h>
#include "nxmu.h"
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxmu_disconnect
****************************************************************************/
static inline void nxmu_disconnect(FAR struct nxmu_conn_s *conn)
{
struct nxclimsg_disconnected_s outmsg;
int ret;
/* Send the handshake message back to the client */
outmsg.msgid = NX_CLIMSG_DISCONNECTED;
ret = nxmu_sendclient(conn, &outmsg, sizeof(struct nxclimsg_disconnected_s));
if (ret < 0)
{
gerr("ERROR: nxmu_sendclient failed: %d\n", ret);
}
/* Close the outgoing client message queue */
mq_close(conn->swrmq);
}
/****************************************************************************
* Name: nxmu_connect
****************************************************************************/
static inline void nxmu_connect(FAR struct nxmu_conn_s *conn)
{
char mqname[NX_CLIENT_MXNAMELEN];
struct nxclimsg_connected_s outmsg;
int ret;
/* Create the client MQ name */
sprintf(mqname, NX_CLIENT_MQNAMEFMT, conn->cid);
/* Open the client MQ -- this should have already been created by the client */
conn->swrmq = mq_open(mqname, O_WRONLY);
if (conn->swrmq == (mqd_t)-1)
{
gerr("ERROR: mq_open(%s) failed: %d\n", mqname, errno);
outmsg.msgid = NX_CLIMSG_DISCONNECTED;
}
/* Send the handshake message back to the client */
outmsg.msgid = NX_CLIMSG_CONNECTED;
ret = nxmu_sendclient(conn, &outmsg, sizeof(struct nxclimsg_connected_s));
if (ret < 0)
{
gerr("ERROR: nxmu_sendclient failed: %d\n", ret);
}
}
/****************************************************************************
* Name: nxmu_shutdown
****************************************************************************/
static inline void nxmu_shutdown(FAR struct nxmu_state_s *nxmu)
{
FAR struct nxbe_window_s *wnd;
/* Inform all of the clients in the window list that the server is
* exit-ting. Notes: (1) that the following loop will probably attempt to
* disconnect clients multiple times because one client may have multiple
* windows: The first disconnect will fail; subsequent will return errors
* that are ignored. (2) The final window to be disconnected will be the
* background window, thus close all of the servers message queues.
*/
for (wnd = nxmu->be.topwnd; wnd; wnd = wnd->below)
{
nxmu_disconnect(wnd->conn);
}
}
/****************************************************************************
* Name: nxmu_event
****************************************************************************/
static void nxmu_event(FAR struct nxbe_window_s *wnd, enum nx_event_e event,
FAR void *arg)
{
struct nxclimsg_event_s outmsg;
int ret;
outmsg.msgid = NX_CLIMSG_EVENT;
outmsg.wnd = wnd;
outmsg.arg = arg;
outmsg.event = event;
ret = nxmu_sendclient(wnd->conn, &outmsg,
sizeof(struct nxclimsg_event_s));
if (ret < 0)
{
gerr("ERROR: nxmu_sendclient failed: %d\n", ret);
}
}
/****************************************************************************
* Name: nxmu_setup
****************************************************************************/
static inline int nxmu_setup(FAR const char *mqname, FAR NX_DRIVERTYPE *dev,
FAR struct nxmu_state_s *nxmu)
{
struct mq_attr attr;
int ret;
memset(nxmu, 0, sizeof(struct nxmu_state_s));
/* Configure the framebuffer/LCD device */
ret = nxbe_configure(dev, &nxmu->be);
if (ret < 0)
{
gerr("ERROR: nxbe_configure failed: %d\n", ret);
return ret;
}
#ifdef CONFIG_FB_CMAP
ret = nxbe_colormap(dev);
if (ret < 0)
{
gerr("ERROR: nxbe_colormap failed: %d\n", ret);
return ret;
}
#endif /* CONFIG_FB_CMAP */
/* Initialize the non-NULL elements of the server connection structure.
* Oddly, this strcture represents the connection between the server and
* itself.
*
* Open the incoming server MQ. The server receives messages on the
* background window's incoming message queue.
*/
attr.mq_maxmsg = CONFIG_NX_MXSERVERMSGS;
attr.mq_msgsize = NX_MXSVRMSGLEN;
attr.mq_flags = 0;
nxmu->conn.crdmq = mq_open(mqname, O_RDONLY | O_CREAT, 0666, &attr);
if (nxmu->conn.crdmq == (mqd_t)-1)
{
int errcode = get_errno();
gerr("ERROR: mq_open(%s) failed: %d\n", mqname, errcode);
return -errcode;
}
/* NOTE that the outgoing client MQ (cwrmq) is not initialized. The
* background window never initiates messages.
*/
/* Open the outgoing server MQ. This is used to send messages to the
* background window which will, of course, be received and handled by
* the server message loop.
*/
nxmu->conn.swrmq = mq_open(mqname, O_WRONLY);
if (nxmu->conn.swrmq == (mqd_t)-1)
{
int errcode = get_errno();
gerr("ERROR: mq_open(%s) failed: %d\n", mqname, errcode);
mq_close(nxmu->conn.crdmq);
return -errcode;
}
/* The server is now "connected" to itself via the background window */
nxmu->conn.state = NX_CLISTATE_CONNECTED;
/* Initialize the non-NULL elements of the background window */
nxmu->be.bkgd.conn = &nxmu->conn;
nxmu->be.bkgd.be = (FAR struct nxbe_state_s *)nxmu;
nxmu->be.bkgd.bounds.pt2.x = nxmu->be.vinfo.xres - 1;
nxmu->be.bkgd.bounds.pt2.y = nxmu->be.vinfo.yres - 1;
/* Complete initialization of the server state structure. The
* window list contains only one element: The background window
* with nothing else above or below it
*/
nxmu->be.topwnd = &nxmu->be.bkgd;
/* Initialize the mouse position */
#ifdef CONFIG_NX_XYINPUT
nxmu_mouseinit(nxmu->be.vinfo.xres, nxmu->be.vinfo.yres);
#endif
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nx_runinstance
*
* Description:
* This is the server entry point. It does not return; the calling thread
* is dedicated to supporting NX server.
*
* NOTE that multiple instances of the NX server may run at the same time,
* each with different callback and message queue names.
*
* Input Parameters:
* mqname - The name for the server incoming message queue
* dev - Vtable "object" of the framebuffer/LCD "driver" to use
*
* Returned Value:
* This function usually does not return. If it does return, it will
* return a negated errno value indicating the cause of the failure.
*
****************************************************************************/
int nx_runinstance(FAR const char *mqname, FAR NX_DRIVERTYPE *dev)
{
struct nxmu_state_s nxmu;
FAR struct nxsvrmsg_s *msg;
char buffer[NX_MXSVRMSGLEN];
int nbytes;
int ret;
/* Initialization *********************************************************/
DEBUGASSERT(mqname != NULL || dev != NULL);
/* Initialize and configure the server */
ret = nxmu_setup(mqname, dev, &nxmu);
if (ret < 0)
{
return ret;
}
/* Produce the initial, background display */
nxbe_redraw(&nxmu.be, &nxmu.be.bkgd, &nxmu.be.bkgd.bounds);
/* Message Loop ***********************************************************/
/* Then loop forever processing incoming messages */
for (; ; )
{
/* Receive the next server message */
nbytes = nxmq_receive(nxmu.conn.crdmq, buffer, NX_MXSVRMSGLEN, 0);
if (nbytes < 0)
{
if (nbytes != -EINTR)
{
gerr("ERROR: nxmq_receive() failed: %d\n", nbytes);
ret = nbytes;
goto errout;
}
continue;
}
/* Dispatch the message appropriately */
DEBUGASSERT(nbytes >= sizeof(struct nxsvrmsg_releasebkgd_s));
msg = (FAR struct nxsvrmsg_s *)buffer;
ginfo("Received opcode=%d nbytes=%d\n", msg->msgid, nbytes);
switch (msg->msgid)
{
/* Messages sent from clients to the NX server *********************/
case NX_SVRMSG_CONNECT: /* Establish connection with new NX server client */
{
FAR struct nxsvrmsg_s *connmsg = (FAR struct nxsvrmsg_s *)buffer;
nxmu_connect(connmsg->conn);
}
break;
case NX_SVRMSG_DISCONNECT: /* Tear down connection with terminating client */
{
FAR struct nxsvrmsg_s *disconnmsg = (FAR struct nxsvrmsg_s *)buffer;
nxmu_disconnect(disconnmsg->conn);
}
break;
case NX_SVRMSG_OPENWINDOW: /* Create a new window */
{
FAR struct nxsvrmsg_openwindow_s *openmsg = (FAR struct nxsvrmsg_openwindow_s *)buffer;
nxmu_openwindow(&nxmu.be, openmsg->wnd);
}
break;
case NX_SVRMSG_CLOSEWINDOW: /* Close an existing window */
{
FAR struct nxsvrmsg_closewindow_s *closemsg = (FAR struct nxsvrmsg_closewindow_s *)buffer;
nxbe_closewindow(closemsg->wnd);
}
break;
case NX_SVRMSG_BLOCKED: /* Block messages to a window */
{
FAR struct nxsvrmsg_blocked_s *blocked = (FAR struct nxsvrmsg_blocked_s *)buffer;
nxmu_event(blocked->wnd, NXEVENT_BLOCKED, blocked->arg);
}
break;
case NX_SVRMSG_SYNCH: /* Synchronization request */
{
FAR struct nxsvrmsg_synch_s *synch = (FAR struct nxsvrmsg_synch_s *)buffer;
nxmu_event(synch->wnd, NXEVENT_SYNCHED, synch->arg);
}
break;
#if defined(CONFIG_NX_SWCURSOR) || defined(CONFIG_NX_HWCURSOR)
case NX_SVRMSG_CURSOR_ENABLE: /* Enable/disable cursor */
{
FAR struct nxsvrmsg_curenable_s *enabmsg = (FAR struct nxsvrmsg_curenable_s *)buffer;
nxbe_cursor_enable(&nxmu.be, enabmsg->enable);
}
break;
#if defined(CONFIG_NX_HWCURSORIMAGE) || defined(CONFIG_NX_SWCURSOR)
case NX_SVRMSG_CURSOR_IMAGE: /* Set cursor image */
{
FAR struct nxsvrmsg_curimage_s *imgmsg = (FAR struct nxsvrmsg_curimage_s *)buffer;
nxbe_cursor_setimage(&nxmu.be, &imgmsg->image);
}
break;
#endif
case NX_SVRMSG_CURSOR_SETPOS: /* Set cursor position */
{
FAR struct nxsvrmsg_curpos_s *posmsg = (FAR struct nxsvrmsg_curpos_s *)buffer;
nxbe_cursor_setposition(&nxmu.be, &posmsg->pos);
}
break;
#endif
case NX_SVRMSG_REQUESTBKGD: /* Give access to the background window */
{
FAR struct nxsvrmsg_requestbkgd_s *rqbgmsg = (FAR struct nxsvrmsg_requestbkgd_s *)buffer;
nxmu_requestbkgd(rqbgmsg->conn, &nxmu.be, rqbgmsg->cb, rqbgmsg->arg);
}
break;
case NX_SVRMSG_RELEASEBKGD: /* End access to the background window */
{
nxmu_releasebkgd(&nxmu);
}
break;
case NX_SVRMSG_SETPOSITION: /* Change window position */
{
FAR struct nxsvrmsg_setposition_s *setposmsg = (FAR struct nxsvrmsg_setposition_s *)buffer;
nxbe_setposition(setposmsg->wnd, &setposmsg->pos);
}
break;
case NX_SVRMSG_SETSIZE: /* Change window size */
{
FAR struct nxsvrmsg_setsize_s *setsizemsg = (FAR struct nxsvrmsg_setsize_s *)buffer;
nxbe_setsize(setsizemsg->wnd, &setsizemsg->size);
}
break;
case NX_SVRMSG_GETPOSITION: /* Get the window size/position */
{
FAR struct nxsvrmsg_getposition_s *getposmsg = (FAR struct nxsvrmsg_getposition_s *)buffer;
nxmu_reportposition(getposmsg->wnd);
}
break;
case NX_SVRMSG_RAISE: /* Move the window to the top of the display */
{
FAR struct nxsvrmsg_raise_s *raisemsg = (FAR struct nxsvrmsg_raise_s *)buffer;
nxbe_raise(raisemsg->wnd);
}
break;
case NX_SVRMSG_LOWER: /* Lower the window to the bottom of the display */
{
FAR struct nxsvrmsg_lower_s *lowermsg = (FAR struct nxsvrmsg_lower_s *)buffer;
nxbe_lower(lowermsg->wnd);
}
break;
case NX_SVRMSG_MODAL: /* Select/De-select window modal state */
{
FAR struct nxsvrmsg_modal_s *modalmsg = (FAR struct nxsvrmsg_modal_s *)buffer;
nxbe_modal(modalmsg->wnd, modalmsg->modal);
}
break;
case NX_SVRMSG_SETVISIBILITY: /* Show or hide a window */
{
FAR struct nxsvrmsg_setvisibility_s *vismsg =
(FAR struct nxsvrmsg_setvisibility_s *)buffer;
nxbe_setvisibility(vismsg->wnd, vismsg->hide);
}
break;
case NX_SVRMSG_SETPIXEL: /* Set a single pixel in the window with a color */
{
FAR struct nxsvrmsg_setpixel_s *setmsg = (FAR struct nxsvrmsg_setpixel_s *)buffer;
nxbe_setpixel(setmsg->wnd, &setmsg->pos, setmsg->color);
}
break;
case NX_SVRMSG_FILL: /* Fill a rectangular region in the window with a color */
{
FAR struct nxsvrmsg_fill_s *fillmsg = (FAR struct nxsvrmsg_fill_s *)buffer;
nxbe_fill(fillmsg->wnd, &fillmsg->rect, fillmsg->color);
}
break;
case NX_SVRMSG_GETRECTANGLE: /* Get a rectangular region from the window */
{
FAR struct nxsvrmsg_getrectangle_s *getmsg = (FAR struct nxsvrmsg_getrectangle_s *)buffer;
nxbe_getrectangle(getmsg->wnd, &getmsg->rect, getmsg->plane, getmsg->dest, getmsg->deststride);
if (getmsg->sem_done)
{
nxsem_post(getmsg->sem_done);
}
}
break;
case NX_SVRMSG_FILLTRAP: /* Fill a trapezoidal region in the window with a color */
{
FAR struct nxsvrmsg_filltrapezoid_s *trapmsg = (FAR struct nxsvrmsg_filltrapezoid_s *)buffer;
nxbe_filltrapezoid(trapmsg->wnd, &trapmsg->clip, &trapmsg->trap, trapmsg->color);
}
break;
case NX_SVRMSG_MOVE: /* Move a rectangular region within the window */
{
FAR struct nxsvrmsg_move_s *movemsg = (FAR struct nxsvrmsg_move_s *)buffer;
nxbe_move(movemsg->wnd, &movemsg->rect, &movemsg->offset);
}
break;
case NX_SVRMSG_BITMAP: /* Copy a rectangular bitmap into the window */
{
FAR struct nxsvrmsg_bitmap_s *bmpmsg = (FAR struct nxsvrmsg_bitmap_s *)buffer;
nxbe_bitmap(bmpmsg->wnd, &bmpmsg->dest, bmpmsg->src, &bmpmsg->origin, bmpmsg->stride);
if (bmpmsg->sem_done)
{
nxsem_post(bmpmsg->sem_done);
}
}
break;
case NX_SVRMSG_SETBGCOLOR: /* Set the color of the background */
{
FAR struct nxsvrmsg_setbgcolor_s *bgcolormsg =
(FAR struct nxsvrmsg_setbgcolor_s *)buffer;
/* Has the background color changed? */
if (!nxgl_colorcmp(nxmu.be.bgcolor, bgcolormsg->color))
{
/* Yes.. fill the background */
nxgl_colorcopy(nxmu.be.bgcolor, bgcolormsg->color);
nxbe_fill(&nxmu.be.bkgd, &nxmu.be.bkgd.bounds, bgcolormsg->color);
}
}
break;
#ifdef CONFIG_NX_XYINPUT
case NX_SVRMSG_MOUSEIN: /* New mouse report from mouse client */
{
FAR struct nxsvrmsg_mousein_s *mousemsg = (FAR struct nxsvrmsg_mousein_s *)buffer;
nxmu_mousein(&nxmu, &mousemsg->pt, mousemsg->buttons);
}
break;
#endif
#ifdef CONFIG_NX_KBD
case NX_SVRMSG_KBDIN: /* New keyboard report from keyboard client */
{
FAR struct nxsvrmsg_kbdin_s *kbdmsg = (FAR struct nxsvrmsg_kbdin_s *)buffer;
nxmu_kbdin(&nxmu, kbdmsg->nch, kbdmsg->ch);
}
break;
#endif
case NX_SVRMSG_REDRAWREQ: /* Request re-drawing of rectangular region */
{
FAR struct nxsvrmsg_redrawreq_s *redrawmsg = (FAR struct nxsvrmsg_redrawreq_s *)buffer;
nxmu_redraw(redrawmsg->wnd, &redrawmsg->rect);
}
break;
/* Messages sent to the background window **************************/
case NX_CLIMSG_REDRAW: /* Re-draw the background window */
{
FAR struct nxclimsg_redraw_s *redraw = (FAR struct nxclimsg_redraw_s *)buffer;
DEBUGASSERT(redraw->wnd == &nxmu.be.bkgd);
ginfo("Re-draw background rect={(%d,%d),(%d,%d)}\n",
redraw->rect.pt1.x, redraw->rect.pt1.y,
redraw->rect.pt2.x, redraw->rect.pt2.y);
nxbe_fill(&nxmu.be.bkgd, &redraw->rect, nxmu.be.bgcolor);
}
break;
case NX_CLIMSG_MOUSEIN: /* Ignored */
case NX_CLIMSG_KBDIN:
break;
case NX_CLIMSG_CONNECTED: /* Shouldn't happen */
case NX_CLIMSG_DISCONNECTED:
default:
gerr("ERROR: Unrecognized command: %d\n", msg->msgid);
break;
}
}
nxmu_shutdown(&nxmu);
return OK;
errout:
nxmu_shutdown(&nxmu);
return ret;
}
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