[b06e68ef] | 1 | /* |
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| 2 | * @(#)server.c 1.3 - 95/08/02 |
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| 3 | * |
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| 4 | * |
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| 5 | * RTEMS monitor server (handles requests for info from RTEMS monitors |
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| 6 | * running on other nodes) |
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| 7 | * |
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| 8 | * $Id$ |
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| 9 | */ |
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| 10 | |
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| 11 | #include <rtems.h> |
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| 12 | |
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| 13 | #include <stdio.h> |
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| 14 | #include <string.h> |
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| 15 | #include <stdlib.h> |
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| 16 | #include <unistd.h> |
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| 17 | |
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| 18 | #include "monitor.h" |
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| 19 | |
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| 20 | /* |
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| 21 | * Various id's for the server |
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| 22 | */ |
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| 23 | |
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| 24 | rtems_id rtems_monitor_server_task_id; |
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| 25 | rtems_id rtems_monitor_server_request_queue_id; /* our server */ |
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| 26 | rtems_id *rtems_monitor_server_request_queue_ids; /* all servers */ |
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| 27 | rtems_id rtems_monitor_server_response_queue_id; /* our server */ |
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| 28 | |
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| 29 | |
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| 30 | /* |
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| 31 | * Send a request to a server task |
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| 32 | */ |
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| 33 | |
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| 34 | rtems_status_code |
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| 35 | rtems_monitor_server_request( |
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| 36 | unsigned32 server_node, |
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| 37 | rtems_monitor_server_request_t *request, |
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| 38 | rtems_monitor_server_response_t *response |
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| 39 | ) |
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| 40 | { |
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| 41 | rtems_id server_id; |
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| 42 | rtems_status_code status; |
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| 43 | unsigned32 size; |
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| 44 | |
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| 45 | /* |
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| 46 | * What is id of monitor on target node? |
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| 47 | * Look it up if we don't know it yet. |
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| 48 | */ |
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| 49 | |
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| 50 | server_id = rtems_monitor_server_request_queue_ids[server_node]; |
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| 51 | if (server_id == 0) |
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| 52 | { |
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| 53 | status = rtems_message_queue_ident(RTEMS_MONITOR_QUEUE_NAME, |
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| 54 | server_node, |
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| 55 | &server_id); |
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| 56 | if (status != RTEMS_SUCCESSFUL) |
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| 57 | { |
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| 58 | rtems_error(status, "ident of remote server failed"); |
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| 59 | goto done; |
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| 60 | } |
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| 61 | |
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| 62 | rtems_monitor_server_request_queue_ids[server_node] = server_id; |
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| 63 | } |
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| 64 | |
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| 65 | request->return_id = rtems_monitor_server_response_queue_id; |
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| 66 | |
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| 67 | status = rtems_message_queue_send(server_id, request, sizeof(*request)); |
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| 68 | if (status != RTEMS_SUCCESSFUL) |
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| 69 | { |
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| 70 | rtems_error(status, "monitor server request send failed"); |
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| 71 | goto done; |
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| 72 | } |
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| 73 | |
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| 74 | /* |
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| 75 | * Await response, if requested |
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| 76 | */ |
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| 77 | |
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| 78 | if (response) |
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| 79 | { |
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| 80 | status = rtems_message_queue_receive(rtems_monitor_server_response_queue_id, |
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| 81 | response, |
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| 82 | &size, |
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| 83 | RTEMS_WAIT, |
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| 84 | 100); |
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| 85 | if (status != RTEMS_SUCCESSFUL) |
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| 86 | { |
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| 87 | rtems_error(status, "server did not respond"); |
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| 88 | |
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| 89 | /* maybe server task was restarted; look it up again next time */ |
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| 90 | rtems_monitor_server_request_queue_ids[server_node] = 0; |
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| 91 | |
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| 92 | goto done; |
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| 93 | } |
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| 94 | |
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| 95 | if (response->command != RTEMS_MONITOR_SERVER_RESPONSE) |
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| 96 | { |
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| 97 | status = RTEMS_INCORRECT_STATE; |
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| 98 | goto done; |
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| 99 | } |
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| 100 | } |
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| 101 | |
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| 102 | done: |
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| 103 | return status; |
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| 104 | } |
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| 105 | |
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| 106 | |
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| 107 | |
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| 108 | /* |
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| 109 | * monitor server task |
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| 110 | */ |
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| 111 | |
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| 112 | void |
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| 113 | rtems_monitor_server_task( |
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| 114 | rtems_task_argument monitor_flags |
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| 115 | ) |
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| 116 | { |
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| 117 | rtems_monitor_server_request_t request; |
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| 118 | rtems_monitor_server_response_t response; |
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| 119 | rtems_status_code status; |
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| 120 | unsigned32 size; |
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| 121 | |
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| 122 | for (;;) |
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| 123 | { |
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| 124 | status = rtems_message_queue_receive( |
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| 125 | rtems_monitor_server_request_queue_id, |
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| 126 | &request, |
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| 127 | &size, |
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| 128 | RTEMS_WAIT, |
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| 129 | (rtems_interval) 0); |
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| 130 | |
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| 131 | if (status != RTEMS_SUCCESSFUL) |
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| 132 | { |
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| 133 | rtems_error(status, "monitor server msg queue receive error"); |
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| 134 | goto failed; |
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| 135 | } |
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| 136 | |
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| 137 | if (size != sizeof(request)) |
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| 138 | { |
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| 139 | rtems_error(0, "monitor server bad size on receive"); |
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| 140 | goto failed; |
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| 141 | } |
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| 142 | |
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| 143 | switch (request.command) |
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| 144 | { |
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| 145 | case RTEMS_MONITOR_SERVER_CANONICAL: |
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| 146 | { |
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| 147 | rtems_object_type_t object_type; |
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| 148 | rtems_id id; |
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| 149 | rtems_id next_id; |
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| 150 | |
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| 151 | object_type = (rtems_object_type_t) request.argument0; |
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| 152 | id = (rtems_id) request.argument1; |
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| 153 | next_id = rtems_monitor_object_canonical_get(object_type, |
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| 154 | id, |
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| 155 | &response.payload, |
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| 156 | &size); |
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| 157 | |
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| 158 | response.command = RTEMS_MONITOR_SERVER_RESPONSE; |
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| 159 | response.result0 = next_id; |
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| 160 | response.result1 = size; |
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| 161 | |
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| 162 | #define SERVER_OVERHEAD (RTEMS_offsetof(rtems_monitor_server_response_t, \ |
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| 163 | payload)) |
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| 164 | |
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| 165 | status = rtems_message_queue_send(request.return_id, |
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| 166 | &response, |
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| 167 | size + SERVER_OVERHEAD); |
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| 168 | if (status != RTEMS_SUCCESSFUL) |
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| 169 | { |
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| 170 | rtems_error(status, "response send failed"); |
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| 171 | goto failed; |
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| 172 | } |
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| 173 | break; |
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| 174 | } |
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| 175 | |
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| 176 | default: |
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| 177 | { |
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| 178 | rtems_error(0, "invalid command to monitor server: %d", request.command); |
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| 179 | goto failed; |
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| 180 | } |
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| 181 | } |
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| 182 | } |
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| 183 | |
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| 184 | failed: |
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| 185 | rtems_task_delete(RTEMS_SELF); |
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| 186 | } |
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| 187 | |
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| 188 | |
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| 189 | /* |
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| 190 | * Kill off any old server |
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| 191 | * Not sure if this is useful, but it doesn't help |
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| 192 | */ |
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| 193 | |
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| 194 | void |
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| 195 | rtems_monitor_server_kill(void) |
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| 196 | { |
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| 197 | if (rtems_monitor_server_task_id) |
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| 198 | rtems_task_delete(rtems_monitor_server_task_id); |
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| 199 | rtems_monitor_task_id = 0; |
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| 200 | |
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| 201 | if (rtems_monitor_server_request_queue_id) |
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| 202 | rtems_message_queue_delete(rtems_monitor_server_request_queue_id); |
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| 203 | rtems_monitor_server_response_queue_id = 0; |
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| 204 | |
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| 205 | if (rtems_monitor_server_response_queue_id) |
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| 206 | rtems_message_queue_delete(rtems_monitor_server_response_queue_id); |
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| 207 | rtems_monitor_server_request_queue_ids = 0; |
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| 208 | |
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| 209 | if (rtems_monitor_server_request_queue_ids) |
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| 210 | free(rtems_monitor_server_request_queue_ids); |
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| 211 | rtems_monitor_server_request_queue_ids = 0; |
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| 212 | } |
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| 213 | |
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| 214 | |
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| 215 | void |
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| 216 | rtems_monitor_server_init( |
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| 217 | unsigned32 monitor_flags |
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| 218 | ) |
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| 219 | { |
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| 220 | rtems_status_code status; |
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| 221 | |
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[3a4ae6c] | 222 | if (_System_state_Is_multiprocessing && |
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[b06e68ef] | 223 | (_Configuration_MP_table->maximum_nodes > 1)) |
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| 224 | { |
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| 225 | unsigned32 maximum_nodes = _Configuration_MP_table->maximum_nodes; |
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| 226 | |
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| 227 | /* |
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| 228 | * create the msg que our server will listen |
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| 229 | * Since we only get msgs from other RTEMS monitors, we just |
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| 230 | * need reserve space for 1 msg from each node. |
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| 231 | */ |
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| 232 | |
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| 233 | status = rtems_message_queue_create( |
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| 234 | RTEMS_MONITOR_QUEUE_NAME, |
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| 235 | maximum_nodes, |
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| 236 | sizeof(rtems_monitor_server_request_t), |
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| 237 | RTEMS_GLOBAL, |
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| 238 | &rtems_monitor_server_request_queue_id); |
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| 239 | |
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| 240 | if (status != RTEMS_SUCCESSFUL) |
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| 241 | { |
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| 242 | rtems_error(status, "could not create monitor server message queue"); |
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| 243 | goto done; |
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| 244 | } |
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| 245 | |
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| 246 | /* |
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| 247 | * create the msg que our responses will come on |
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| 248 | * Since monitor just does one thing at a time, we only need 1 item |
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| 249 | * message queue. |
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| 250 | */ |
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| 251 | |
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| 252 | status = rtems_message_queue_create( |
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| 253 | RTEMS_MONITOR_RESPONSE_QUEUE_NAME, |
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| 254 | 1, /* depth */ |
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| 255 | sizeof(rtems_monitor_server_response_t), |
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| 256 | RTEMS_GLOBAL, |
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| 257 | &rtems_monitor_server_response_queue_id); |
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| 258 | |
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| 259 | if (status != RTEMS_SUCCESSFUL) |
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| 260 | { |
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| 261 | rtems_error(status, "could not create monitor response message queue"); |
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| 262 | goto done; |
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| 263 | } |
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| 264 | |
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| 265 | /* need an id for queue of each other server we might talk to */ |
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| 266 | /* indexed by node, so add 1 to maximum_nodes */ |
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| 267 | rtems_monitor_server_request_queue_ids = |
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| 268 | (rtems_id *) malloc((maximum_nodes + 1) * sizeof(rtems_id)); |
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| 269 | (void) memset(rtems_monitor_server_request_queue_ids, |
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| 270 | 0, |
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| 271 | (maximum_nodes + 1) * sizeof(rtems_id)); |
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| 272 | |
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| 273 | rtems_monitor_server_request_queue_ids[rtems_monitor_node] = |
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| 274 | rtems_monitor_server_request_queue_id; |
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| 275 | |
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| 276 | /* |
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| 277 | * create the server task |
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| 278 | */ |
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| 279 | status = rtems_task_create(RTEMS_MONITOR_SERVER_NAME, |
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| 280 | 1, |
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| 281 | 0 /* default stack */, |
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| 282 | RTEMS_INTERRUPT_LEVEL(0), |
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| 283 | RTEMS_DEFAULT_ATTRIBUTES, |
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| 284 | &rtems_monitor_server_task_id); |
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| 285 | if (status != RTEMS_SUCCESSFUL) |
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| 286 | { |
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| 287 | rtems_error(status, "could not create monitor server task"); |
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| 288 | goto done; |
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| 289 | } |
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| 290 | |
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| 291 | /* |
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| 292 | * Start the server task |
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| 293 | */ |
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| 294 | status = rtems_task_start(rtems_monitor_server_task_id, |
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| 295 | rtems_monitor_server_task, |
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| 296 | monitor_flags); |
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| 297 | if (status != RTEMS_SUCCESSFUL) |
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| 298 | { |
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| 299 | rtems_error(status, "could not start monitor server"); |
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| 300 | goto done; |
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| 301 | } |
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| 302 | } |
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| 303 | |
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| 304 | done: |
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| 305 | } |
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