From ebbd91b441da21e7e56b0f01c616c3e2f50451ef Mon Sep 17 00:00:00 2001 From: Gregory Nutt Date: Mon, 25 Mar 2019 13:50:01 -0600 Subject: [PATCH] Grrr.. Once again I forget to 'add' files before committing them. --- libs/libnx/nxmu/nx_synch.c | 120 +++++++++++++++++++++++++++++++++++ libs/libnx/nxtk/nxtk_synch.c | 101 +++++++++++++++++++++++++++++ 2 files changed, 221 insertions(+) create mode 100644 libs/libnx/nxmu/nx_synch.c create mode 100644 libs/libnx/nxtk/nxtk_synch.c diff --git a/libs/libnx/nxmu/nx_synch.c b/libs/libnx/nxmu/nx_synch.c new file mode 100644 index 00000000000..671ad879e14 --- /dev/null +++ b/libs/libnx/nxmu/nx_synch.c @@ -0,0 +1,120 @@ +/**************************************************************************** + * libs/libnx/nxmu/nx_synch.c + * + * Copyright (C) 2019 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 + +#include +#include + +#include +#include +#include + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nx_synch + * + * Description: + * This interface can be used to syncrhonize the window client with the + * NX server. It really just implements an 'echo': A synch message is + * sent from the window client to the server which then responds + * immediately by sending the NXEVENT_SYNCHED back to the windows client. + * + * Due to the highly asynchronous nature of client-server communications, + * nx_synch() is sometimes necessary to assure that the client and server + * are fully synchronized in time. + * + * Usage by the window client might be something like this: + * + * extern bool g_synched; + * extern sem_t g_synch_sem; + * + * g_synched = false; + * ret = nx_synch(hwnd, handle); + * if (ret < 0) + * { + * -- Handle the error -- + * } + * + * while (!g_synched) + * { + * ret = sem_wait(&g_sync_sem); + * if (ret < 0) + * { + * -- Handle the error -- + * } + * } + * + * When the windwo listener thread receives the NXEVENT_SYNCHED event, it + * would set g_synched to true and post g_synch_sem, waking up the above + * loop. + * + * Input Parameters: + * wnd - The window to be synched + * arg - An argument that will accompany the block messages (This is arg2 + * in the event callback). + * + * Returned Value: + * OK on success; ERROR on failure with errno set appropriately + * + ****************************************************************************/ + +int nx_synch(NXWINDOW hwnd, FAR void *arg) +{ + struct nxsvrmsg_synch_s outmsg; + +#ifdef CONFIG_DEBUG_FEATURES + if (hwnd == NULL) + { + set_errno(EINVAL); + return ERROR; + } +#endif + + /* Send the syncrhonization request message. */ + + outmsg.msgid = NX_SVRMSG_SYNCH; + outmsg.wnd = (FAR struct nxbe_window_s *)hwnd; + outmsg.arg = arg; + + return nxmu_sendwindow(hwnd, &outmsg, sizeof(struct nxsvrmsg_synch_s)); +} diff --git a/libs/libnx/nxtk/nxtk_synch.c b/libs/libnx/nxtk/nxtk_synch.c new file mode 100644 index 00000000000..76e7c5166e1 --- /dev/null +++ b/libs/libnx/nxtk/nxtk_synch.c @@ -0,0 +1,101 @@ +/**************************************************************************** + * libs/libnx/nxtk/nxtk_synch.c + * + * Copyright (C) 2019 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 + +#include +#include +#include + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxtk_synch + * + * Description: + * This interface can be used to syncrhonize the window client with the + * NX server. It really just implements an 'echo': A synch message is + * sent from the window client to the server which then responds + * immediately by sending the NXEVENT_SYNCHED back to the windows client. + * + * Due to the highly asynchronous nature of client-server communications, + * nxtk_synch() is sometimes necessary to assure that the client and server + * are fully synchronized in time. + * + * Usage by the window client might be something like this: + * + * extern bool g_synched; + * extern sem_t g_synch_sem; + * + * g_synched = false; + * ret = nxtk_synch(hwnd, handle); + * if (ret < 0) + * { + * -- Handle the error -- + * } + * + * while (!g_synched) + * { + * ret = sem_wait(&g_sync_sem); + * if (ret < 0) + * { + * -- Handle the error -- + * } + * } + * + * When the windwo listener thread receives the NXEVENT_SYNCHED event, it + * would set g_synched to true and post g_synch_sem, waking up the above + * loop. + * + * Input Parameters: + * hfwnd - The window to be synched + * arg - An argument that will accompany the block messages (This is arg2 + * in the event callback). + * + * Returned Value: + * OK on success; ERROR on failure with errno set appropriately + * + ****************************************************************************/ + +int nxtk_synch(NXTKWINDOW hfwnd, FAR void *arg) +{ + return nx_synch((NXWINDOW)hfwnd, arg); +}