scoutos / prex-0.9.0 / usr / sample / ipc / ipc.c @ 03e9c04a
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/*
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* Copyright (c) 2005, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* ipc.c - A sample program for IPC message transmission.
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*/
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#include <sys/prex.h> |
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#include <ipc/ipc.h> |
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#include <stdio.h> |
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#include <string.h> |
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/*
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* Message structure
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*/
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struct chat_msg {
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struct msg_header hdr; /* Message header */ |
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char str[128]; /* String */ |
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}; |
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static char stack[1024]; |
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/*
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* Start client task/thread
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*/
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static task_t
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start_client(void (*func)(void), char *stack) |
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{ |
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task_t task; |
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thread_t t; |
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#ifdef CONFIG_MMU
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if (task_create(task_self(), VM_COPY, &task) != 0) |
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return 0; |
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#else
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task = task_self(); |
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#endif
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if (thread_create(task, &t) != 0) |
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return 0; |
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if (thread_load(t, func, stack) != 0) |
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return 0; |
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if (thread_resume(t) != 0) |
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return 0; |
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return task;
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} |
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/*
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* Send message to server
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*/
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void
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send_message(object_t obj, const char *str) |
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{ |
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struct chat_msg msg;
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timer_sleep(2000, 0); |
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strcpy(msg.str, str); |
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msg_send(obj, &msg, sizeof(msg));
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printf("client: Received \"%s\"\n", msg.str);
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} |
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/*
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* Client task
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*/
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static void |
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client_task(void)
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{ |
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object_t obj; |
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int error;
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printf("Client is started\n");
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/*
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* Find objects.
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*/
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if ((error = object_lookup("test", &obj)) != 0) |
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panic("can not find object");
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/*
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* Send message per 2 second.
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*/
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send_message(obj, "Hello!");
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send_message(obj, "This is a client task.");
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send_message(obj, "Who are you?");
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send_message(obj, "How are you?");
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send_message(obj, "....");
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send_message(obj, "Bye!");
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send_message(obj, "Exit");
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#ifdef CONFIG_MMU
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printf("Exit client task...\n");
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task_terminate(task_self()); |
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#endif
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} |
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int
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main(int argc, char *argv[]) |
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{ |
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object_t obj = 0;
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struct chat_msg msg;
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int error, exit;
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printf("IPC sample program\n");
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/*
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* Boost priority of this thread
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*/
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thread_setpri(thread_self(), 90);
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/*
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* Create object
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*/
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if ((error = object_create("test", &obj)) != 0) |
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panic("fail to create object");
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/*
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* Start client task.
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*/
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if (start_client(client_task, stack+1024) == 0) |
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panic("fail to create task");
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/*
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* Message loop
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*/
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exit = 0;
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while (exit == 0) { |
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/*
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* Wait for an incoming request.
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*/
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error = msg_receive(obj, &msg, sizeof(msg));
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if (error)
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continue;
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/*
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* Process request.
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*/
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printf("server: Received \"%s\"\n", msg.str);
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if (!strcmp(msg.str, "Exit")) |
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exit = 1;
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if (!strcmp(msg.str, "Hello!")) |
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strcpy(msg.str, "Hi.");
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else if (!strcmp(msg.str, "Bye!")) |
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strcpy(msg.str, "Bye.");
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else
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strcpy(msg.str, "OK.");
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/*
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* Reply to the client.
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*/
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msg_reply(obj, &msg, sizeof(msg));
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} |
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timer_sleep(1000, 0); |
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printf("End...\n");
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return 0; |
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} |