HelenOS sources

root/uspace/lib/wndmgt/src/wndmgt_srv.c

DEFINITIONS

1. wndmgt_callback_create_srv
2. wndmgt_get_window_list_srv
3. wndmgt_get_window_info_srv
4. wndmgt_activate_window_srv
5. wndmgt_close_window_srv
6. wndmgt_get_event_srv
7. wndmgt_conn
8. wndmgt_srv_initialize
9. wndmgt_srv_ev_pending

/*
 * Copyright (c) 2023 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/** @addtogroup libwndmgt
 * @{
 */
/**
 * @file
 * @brief Window management protocol server stub
 */

#include <wndmgt_srv.h>
#include <errno.h>
#include <io/log.h>
#include <ipc/wndmgt.h>
#include <mem.h>
#include <stdlib.h>
#include <stddef.h>
#include <str.h>
#include <wndmgt.h>
#include "../private/wndmgt.h"

static void wndmgt_callback_create_srv(wndmgt_srv_t *srv, ipc_call_t *call)
{
        async_sess_t *sess = async_callback_receive(EXCHANGE_SERIALIZE);
        if (sess == NULL) {
                async_answer_0(call, ENOMEM);
                return;
        }

        srv->client_sess = sess;
        async_answer_0(call, EOK);
}

static void wndmgt_get_window_list_srv(wndmgt_srv_t *srv, ipc_call_t *icall)
{
        ipc_call_t call;
        wndmgt_window_list_t *list = NULL;
        size_t size;
        errno_t rc;

        if (srv->ops->get_window_list == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        rc = srv->ops->get_window_list(srv->arg, &list);
        if (rc != EOK) {
                async_answer_0(icall, rc);
                return;
        }

        /* Send list size */

        if (!async_data_read_receive(&call, &size)) {
                wndmgt_free_window_list(list);
                async_answer_0(&call, EREFUSED);
                async_answer_0(icall, EREFUSED);
                return;
        }

        if (size != sizeof(list->nwindows)) {
                wndmgt_free_window_list(list);
                async_answer_0(&call, EINVAL);
                async_answer_0(icall, EINVAL);
                return;
        }

        rc = async_data_read_finalize(&call, &list->nwindows, size);
        if (rc != EOK) {
                wndmgt_free_window_list(list);
                async_answer_0(&call, rc);
                async_answer_0(icall, rc);
                return;
        }

        /* Send window list */

        if (!async_data_read_receive(&call, &size)) {
                wndmgt_free_window_list(list);
                async_answer_0(&call, EREFUSED);
                async_answer_0(icall, EREFUSED);
                return;
        }

        if (size != list->nwindows * sizeof(sysarg_t)) {
                wndmgt_free_window_list(list);
                async_answer_0(&call, EINVAL);
                async_answer_0(icall, EINVAL);
                return;
        }

        rc = async_data_read_finalize(&call, list->windows, size);
        if (rc != EOK) {
                wndmgt_free_window_list(list);
                async_answer_0(&call, rc);
                async_answer_0(icall, rc);
                return;
        }

        async_answer_0(icall, EOK);
        wndmgt_free_window_list(list);
}

static void wndmgt_get_window_info_srv(wndmgt_srv_t *srv, ipc_call_t *icall)
{
        sysarg_t wnd_id;
        ipc_call_t call;
        wndmgt_window_info_t *info = NULL;
        size_t capsize;
        size_t size;
        errno_t rc;

        wnd_id = ipc_get_arg1(icall);

        if (srv->ops->get_window_info == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        rc = srv->ops->get_window_info(srv->arg, wnd_id, &info);
        if (rc != EOK) {
                async_answer_0(icall, rc);
                return;
        }

        /* Send caption size */

        if (!async_data_read_receive(&call, &size)) {
                wndmgt_free_window_info(info);
                async_answer_0(&call, EREFUSED);
                async_answer_0(icall, EREFUSED);
                return;
        }

        if (size != sizeof(size_t)) {
                wndmgt_free_window_info(info);
                async_answer_0(&call, EINVAL);
                async_answer_0(icall, EINVAL);
                return;
        }

        capsize = str_size(info->caption);

        rc = async_data_read_finalize(&call, &capsize, size);
        if (rc != EOK) {
                wndmgt_free_window_info(info);
                async_answer_0(&call, rc);
                async_answer_0(icall, rc);
                return;
        }

        /* Send caption */

        if (!async_data_read_receive(&call, &size)) {
                wndmgt_free_window_info(info);
                async_answer_0(&call, EREFUSED);
                async_answer_0(icall, EREFUSED);
                return;
        }

        if (size != capsize) {
                wndmgt_free_window_info(info);
                async_answer_0(&call, EINVAL);
                async_answer_0(icall, EINVAL);
                return;
        }

        rc = async_data_read_finalize(&call, info->caption, size);
        if (rc != EOK) {
                wndmgt_free_window_info(info);
                async_answer_0(&call, rc);
                async_answer_0(icall, rc);
                return;
        }

        async_answer_2(icall, EOK, info->flags, info->nfocus);
        wndmgt_free_window_info(info);
}

static void wndmgt_activate_window_srv(wndmgt_srv_t *srv, ipc_call_t *icall)
{
        sysarg_t dev_id;
        sysarg_t wnd_id;
        errno_t rc;

        dev_id = ipc_get_arg1(icall);
        wnd_id = ipc_get_arg2(icall);

        if (srv->ops->activate_window == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        rc = srv->ops->activate_window(srv->arg, dev_id, wnd_id);
        async_answer_0(icall, rc);
}

static void wndmgt_close_window_srv(wndmgt_srv_t *srv, ipc_call_t *icall)
{
        sysarg_t wnd_id;
        errno_t rc;

        wnd_id = ipc_get_arg1(icall);

        if (srv->ops->close_window == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        rc = srv->ops->close_window(srv->arg, wnd_id);
        async_answer_0(icall, rc);
}

static void wndmgt_get_event_srv(wndmgt_srv_t *srv, ipc_call_t *icall)
{
        wndmgt_ev_t event;
        ipc_call_t call;
        size_t size;
        errno_t rc;

        if (srv->ops->get_event == NULL) {
                async_answer_0(icall, ENOTSUP);
                return;
        }

        rc = srv->ops->get_event(srv->arg, &event);
        if (rc != EOK) {
                async_answer_0(icall, rc);
                return;
        }

        /* Transfer event data */
        if (!async_data_read_receive(&call, &size)) {
                async_answer_0(&call, EREFUSED);
                async_answer_0(icall, EREFUSED);
                return;
        }

        if (size != sizeof(event)) {
                async_answer_0(&call, EREFUSED);
                async_answer_0(icall, EREFUSED);
                return;
        }

        rc = async_data_read_finalize(&call, &event, sizeof(event));
        if (rc != EOK) {
                async_answer_0(&call, rc);
                async_answer_0(icall, rc);
                return;
        }

        async_answer_0(icall, EOK);
}

void wndmgt_conn(ipc_call_t *icall, wndmgt_srv_t *srv)
{
        /* Accept the connection */
        async_accept_0(icall);

        while (true) {
                ipc_call_t call;

                async_get_call(&call);
                sysarg_t method = ipc_get_imethod(&call);

                if (!method) {
                        /* The other side has hung up */
                        async_answer_0(&call, EOK);
                        break;
                }

                switch (method) {
                case WNDMGT_CALLBACK_CREATE:
                        wndmgt_callback_create_srv(srv, &call);
                        break;
                case WNDMGT_GET_WINDOW_LIST:
                        wndmgt_get_window_list_srv(srv, &call);
                        break;
                case WNDMGT_GET_WINDOW_INFO:
                        wndmgt_get_window_info_srv(srv, &call);
                        break;
                case WNDMGT_ACTIVATE_WINDOW:
                        wndmgt_activate_window_srv(srv, &call);
                        break;
                case WNDMGT_CLOSE_WINDOW:
                        wndmgt_close_window_srv(srv, &call);
                        break;
                case WNDMGT_GET_EVENT:
                        wndmgt_get_event_srv(srv, &call);
                        break;
                default:
                        async_answer_0(&call, ENOTSUP);
                }
        }

        /* Hang up callback session */
        if (srv->client_sess != NULL) {
                async_hangup(srv->client_sess);
                srv->client_sess = NULL;
        }
}

/** Initialize window management server structure
 *
 * @param srv Window management server structure to initialize
 */
void wndmgt_srv_initialize(wndmgt_srv_t *srv)
{
        memset(srv, 0, sizeof(*srv));
}

/** Send 'pending' event to client.
 *
 * @param srv Window management server structure
 */
void wndmgt_srv_ev_pending(wndmgt_srv_t *srv)
{
        async_exch_t *exch;

        exch = async_exchange_begin(srv->client_sess);
        async_msg_0(exch, WNDMGT_EV_PENDING);
        async_exchange_end(exch);
}

/** @}
 */