apps/lib/libcdi/cdi.c

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   4
   5     This program is free software: you can redistribute it and/or modify
   6     it under the terms of the GNU Lesser General Public License as published by
   7     the Free Software Foundation, either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU Lesser General Public License for more details.
  14
  15     You should have received a copy of the GNU Lesser General Public License
  16     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #include <string.h>
  20 #include <devfs.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <stdarg.h>
  24 #include <cdi/misc.h>
  25 #include <cdi/lists.h>
  26 #include <cdi/storage.h>
  27 #include <cdi/fs.h>
  28 #include <rpc.h>
  29 #include <cdi.h>
  30
  31 int cdi_fs_init();
  32
  33 /**
  34  * Destroys CDI
  35  */
  36 void cdi_destroy() {
  37   cdi_debug("destroy\n");
  38   struct cdi_driver* driver;
  39   while ((driver = cdi_list_pop(cdi_drivers))) driver->destroy(driver);
  40 }
  41
  42 /**
  43  * Initializes CDI
  44  */
  45 void cdi_init() {
  46   cdi_debug("init\n");
  47   atexit(cdi_destroy);
  48   cdi_drivers = cdi_list_create();
  49   cdi_filesystems = cdi_list_create();
  50   devfs_init();
  51   cdi_fs_init();
  52 }
  53
  54 /**
  55  * Runs all CDI drivers
  56  */
  57 void cdi_run_drivers() {
  58   cdi_debug("run drivers\n");
  59   struct cdi_driver* driver;
  60   struct cdi_device* device;
  61   int i, j;
  62
  63   for (i=0;(driver = cdi_list_get(cdi_drivers,i));i++) {
  64     cdi_debug("init driver: %s\n",driver->name);
  65     for (j = 0;(device = cdi_list_get(driver->devices,j));j++) {
  66       device->driver = driver;
  67       if (driver->init_device!=NULL) driver->init_device(device);
  68     }
  69   }
  70
  71   rpc_mainloop(-1);
  72 }
  73
  74 /**
  75  * Initializes a CDI driver
  76  *  @param driver Driver to initialize
  77  */
  78 void cdi_driver_init(struct cdi_driver* driver) {
  79   cdi_debug("driver init\n");
  80   driver->devices = cdi_list_create();
  81 }
  82
  83 /**
  84  * Destroys a CDI driver
  85  *  @param driver Driver to destroy
  86  */
  87 void cdi_driver_destroy(struct cdi_driver* driver) {
  88   cdi_debug("driver destroy: %s\n",driver->name);
  89   cdi_list_destroy(driver->devices);
  90 }
  91
  92 /**
  93  * Registers a CDI driver
  94  *  @param driver Driver to register
  95  */
  96 void cdi_driver_register(struct cdi_driver* driver) {
  97   cdi_debug("driver register: %s\n",driver->name);
  98   cdi_list_push(cdi_drivers,driver);
  99 }
 100
 101 /**
 102  * Prints debug message
 103  *  @param fmt Format
 104  *  @param ... Parameters
 105  */
 106 void cdi_debug(const char *fmt,...) {
 107 #ifdef CDI_DEBUG
 108   va_list args;
 109   va_start(args,fmt);
 110   fprintf(CDI_DEBUG,"cdi (%d): ",getpid());
 111   vfprintf(CDI_DEBUG,fmt,args);
 112   va_end(args);
 113 #endif
 114 }