root / prex-0.9.0 / usr / sample / ipc / ipc.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*
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2 | * Copyright (c) 2005, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | /*
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31 | * ipc.c - A sample program for IPC message transmission.
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32 | */
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33 | |||
34 | #include <sys/prex.h> |
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35 | #include <ipc/ipc.h> |
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36 | #include <stdio.h> |
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37 | #include <string.h> |
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38 | |||
39 | /*
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40 | * Message structure
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41 | */
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42 | struct chat_msg {
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43 | struct msg_header hdr; /* Message header */ |
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44 | char str[128]; /* String */ |
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45 | }; |
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46 | |||
47 | |||
48 | static char stack[1024]; |
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49 | |||
50 | /*
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51 | * Start client task/thread
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52 | */
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53 | static task_t
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54 | start_client(void (*func)(void), char *stack) |
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55 | { |
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56 | task_t task; |
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57 | thread_t t; |
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58 | |||
59 | #ifdef CONFIG_MMU
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60 | if (task_create(task_self(), VM_COPY, &task) != 0) |
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61 | return 0; |
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62 | #else
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63 | task = task_self(); |
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64 | #endif
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65 | if (thread_create(task, &t) != 0) |
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66 | return 0; |
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67 | |||
68 | if (thread_load(t, func, stack) != 0) |
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69 | return 0; |
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70 | |||
71 | if (thread_resume(t) != 0) |
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72 | return 0; |
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73 | |||
74 | return task;
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75 | } |
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76 | |||
77 | /*
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78 | * Send message to server
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79 | */
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80 | void
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81 | send_message(object_t obj, const char *str) |
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82 | { |
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83 | struct chat_msg msg;
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84 | |||
85 | timer_sleep(2000, 0); |
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86 | strcpy(msg.str, str); |
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87 | msg_send(obj, &msg, sizeof(msg));
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88 | printf("client: Received \"%s\"\n", msg.str);
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89 | } |
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90 | |||
91 | |||
92 | /*
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93 | * Client task
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94 | */
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95 | static void |
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96 | client_task(void)
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97 | { |
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98 | object_t obj; |
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99 | int error;
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100 | |||
101 | printf("Client is started\n");
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102 | |||
103 | /*
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104 | * Find objects.
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105 | */
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106 | if ((error = object_lookup("test", &obj)) != 0) |
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107 | panic("can not find object");
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108 | |||
109 | /*
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110 | * Send message per 2 second.
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111 | */
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112 | send_message(obj, "Hello!");
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113 | send_message(obj, "This is a client task.");
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114 | send_message(obj, "Who are you?");
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115 | send_message(obj, "How are you?");
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116 | send_message(obj, "....");
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117 | send_message(obj, "Bye!");
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118 | send_message(obj, "Exit");
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119 | |||
120 | #ifdef CONFIG_MMU
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121 | printf("Exit client task...\n");
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122 | task_terminate(task_self()); |
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123 | #endif
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124 | } |
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125 | |||
126 | int
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127 | main(int argc, char *argv[]) |
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128 | { |
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129 | object_t obj = 0;
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130 | struct chat_msg msg;
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131 | int error, exit;
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132 | |||
133 | printf("IPC sample program\n");
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134 | |||
135 | /*
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136 | * Boost priority of this thread
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137 | */
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138 | thread_setpri(thread_self(), 90);
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139 | |||
140 | /*
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141 | * Create object
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142 | */
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143 | if ((error = object_create("test", &obj)) != 0) |
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144 | panic("fail to create object");
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145 | |||
146 | /*
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147 | * Start client task.
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148 | */
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149 | if (start_client(client_task, stack+1024) == 0) |
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150 | panic("fail to create task");
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151 | |||
152 | /*
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153 | * Message loop
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154 | */
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155 | exit = 0;
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156 | while (exit == 0) { |
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157 | /*
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158 | * Wait for an incoming request.
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159 | */
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160 | error = msg_receive(obj, &msg, sizeof(msg));
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161 | if (error)
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162 | continue;
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163 | /*
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164 | * Process request.
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165 | */
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166 | printf("server: Received \"%s\"\n", msg.str);
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167 | if (!strcmp(msg.str, "Exit")) |
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168 | exit = 1;
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169 | |||
170 | if (!strcmp(msg.str, "Hello!")) |
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171 | strcpy(msg.str, "Hi.");
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172 | else if (!strcmp(msg.str, "Bye!")) |
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173 | strcpy(msg.str, "Bye.");
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174 | else
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175 | strcpy(msg.str, "OK.");
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176 | |||
177 | /*
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178 | * Reply to the client.
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179 | */
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180 | msg_reply(obj, &msg, sizeof(msg));
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181 | } |
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182 | timer_sleep(1000, 0); |
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183 | printf("End...\n");
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184 | return 0; |
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185 | } |