WebSVN – HelenOS – Diff – /trunk/uspace/srv/devmap/devmap.c

 /*
  * Copyright (c) 2007 Josef Cejka
  * 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.
  */
 /**
  * @defgroup devmap Device mapper.
  * @brief   HelenOS device mapper.
  * @{
  */
 /** @file
  */
 #include <ipc/services.h>
 #include <ipc/ns.h>
 #include <async.h>
 #include <stdio.h>
 #include <errno.h>
+#include <bool.h>
+#include <libadt/list.h>
+#include <futex.h>
 #include "devmap.h"
+LIST_INITIALIZE(device_list);
+atomic_t device_list_futex = FUTEX_INITIALIZER;
 /** Initialize device mapper.
+ *
+ *
  */
 static int devmap_init()
+{
     /* */
-    return 0;
+    return EOK;
+}
+static int devmap_register()
+{
+    ipc_callid_t callid2;
+    size_t size;
+    char buffer[DEVMAP_NAME_MAXLEN + 1];
+    ipc_callid_t callid;
+    ipc_call_t call;
+    int retval;
+    if (ipc_data_receive(&callid, &call, NULL, &size) != 0) {
+    //  retval =
+    }
+    if (size > DEVMAP_NAME_MAXLEN) {
+        retval = ELIMIT;
+    } else {
+        ipc_data_deliver(callid2, &call, buffer, size);
+        buffer[DEVMAP_NAME_MAXLEN] = 0;
+    }
+    return EOK;
+}
+static int devmap_unregister()
+{
+    return EOK;
+}
+static int devmap_forward(int handle, ipc_call_t *call, ipc_callid_t callid)
+{
+    link_t *item;
+    ipcarg_t phone;
+    devmap_device_t *dev;
+    /* FIXME: add futex */
+    futex_down(&device_list_futex);
+    item = (&device_list)->next;
+    while (item != &device_list) {
+        dev = list_get_instance(item, devmap_device_t, list);
+        if (dev->handle == handle) {
+            break;
+        }
+        item = item->next;
+    }
+    if (item == &device_list) {
+        return ENOENT;
+    }
+    dev = list_get_instance(item, devmap_device_t, list);
+    phone = dev->phone;
+    futex_up(&device_list_futex);
+    return ipc_forward_fast(callid, phone, 0, 0);
+}
+static int devmap_get_handle()
+{
+    return EOK;
+}
 /** Function for handling connections to devmap
+ *
  */
 static void
 devmap_client_connection(ipc_callid_t iid, ipc_call_t *icall)
+{
     ipc_callid_t callid;
     ipc_call_t call;
     int retval;
+    bool cont = true;
+    printf("DevMap: new connection.");
     ipc_answer_fast(iid, EOK, 0, 0); /* Accept connection */
-    while (1) {
+    while (cont) {
         callid = async_get_call(&call);
         switch (IPC_GET_METHOD(call)) {
         case IPC_M_PHONE_HUNGUP:
                 /* TODO: if its a device connection, remove it from table */
+            devmap_unregister();
+            printf("DevMap: connection hung up.");
+            cont = false;
-            return; /* Exit thread */
+            continue; /* Exit thread */
         case DEVMAP_REGISTER:
+            if ((retval = devmap_register()) != EOK) {
-            /* TODO: */
+                cont = false;
+            }
+            break;
         case DEVMAP_UNREGISTER:
+            /* TODO: remove device (if registred) */
+            retval = devmap_unregister();
-            /* TODO: */
+            cont = false;
+            break;
         case DEVMAP_CONNECT_TO_DEVICE:
+            retval = devmap_forward(IPC_GET_ARG1(call), &call, callid);
-            /* TODO: */
+            cont = false;
-            retval = 0;
+            break;
+        case DEVMAP_GET_HANDLE:
             break;
         default:
             retval = ENOENT;
+        }
         ipc_answer_fast(callid, retval, 0, 0);
+    }
+    printf("DevMap: connection closed.");
+    return;
+}
 int main(int argc, char *argv[])
+{
     ipcarg_t phonead;
     printf("DevMap: HelenOS device mapper.\n");
     if (devmap_init() != 0) {
         printf("Error while initializing DevMap service.");
         return -1;
+    }
         /* Set a handler of incomming connections */
     async_set_client_connection(devmap_client_connection);
         /* Register device mapper at naming service */
     if (ipc_connect_to_me(PHONE_NS, SERVICE_DEVMAP, 0, &phonead) != 0)
         return -1;
     async_manager();
     /* Never reached */
     return 0;
+}
 /**
  * @}
  */

Subversion Repositories HelenOS

(root)/trunk/uspace/srv/devmap/devmap.c – Rev 2550 → 2555