daemon/cmd_remove_app.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2010 Nedko Arnaudov <nedko@arnaudov.name>
   6  *
   7  **************************************************************************
   8  * This file contains implementation of the "remove app" command
   9  **************************************************************************
  10  *
  11  * LADI Session Handler is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * LADI Session Handler is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  23  * or write to the Free Software Foundation, Inc.,
  24  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include <ctype.h>
  28 #include "cmd.h"
  29 #include "studio.h"
  30 #include "../dbus/error.h"
  31 #include "../proxies/notify_proxy.h"
  32 #include "virtualizer.h"
  33
  34 struct ladish_command_remove_app
  35 {
  36   struct ladish_command command; /* must be the first member */
  37   char * opath;
  38   uint64_t id;
  39 };
  40
  41 #define cmd_ptr ((struct ladish_command_remove_app *)context)
  42
  43 static bool run(void * context)
  44 {
  45   ladish_app_supervisor_handle supervisor;
  46   ladish_app_handle app;
  47   const char * app_name;
  48
  49   ASSERT(cmd_ptr->command.state == LADISH_COMMAND_STATE_PENDING);
  50
  51   log_info("remove app command. opath='%s'", cmd_ptr->opath);
  52
  53   supervisor = ladish_studio_find_app_supervisor(cmd_ptr->opath);
  54   if (supervisor == NULL)
  55   {
  56     log_error("cannot find supervisor '%s' to remove app from", cmd_ptr->opath);
  57     ladish_notify_simple(LADISH_NOTIFY_URGENCY_HIGH, "Cannot remove app because of internal error (unknown supervisor)", NULL);
  58     return false;
  59   }
  60
  61   app = ladish_app_supervisor_find_app_by_id(supervisor, cmd_ptr->id);
  62   if (app == NULL)
  63   {
  64     log_error("App with ID %"PRIu64" not found and (remove)", cmd_ptr->id);
  65     ladish_notify_simple(LADISH_NOTIFY_URGENCY_HIGH, "Cannot remove app because it is not found", NULL);
  66     return false;
  67   }
  68
  69   app_name = ladish_app_get_name(app);
  70
  71   if (ladish_app_is_running(app))
  72   {
  73     if (cmd_ptr->command.state == LADISH_COMMAND_STATE_PENDING)
  74     {
  75       log_info("App %s is not stopped as it should", app_name);
  76       ladish_notify_simple(LADISH_NOTIFY_URGENCY_HIGH, "Cannot remove app because it is not stopped (because of internal error)", NULL);
  77     }
  78     return false;
  79   }
  80
  81   /* remove jclient and vclient for this app */
  82   log_info("Removing graph objects for app '%s'", app_name);
  83   ladish_virtualizer_remove_app(ladish_studio_get_jack_graph(), app_name);
  84
  85   ladish_app_supervisor_remove_app(supervisor, app);
  86   cmd_ptr->command.state = LADISH_COMMAND_STATE_DONE;
  87   return true;
  88 }
  89
  90 static void destructor(void * context)
  91 {
  92   log_info("remove_app command destructor");
  93   free(cmd_ptr->opath);
  94 }
  95
  96 #undef cmd_ptr
  97
  98 bool ladish_command_remove_app(void * call_ptr, struct ladish_cqueue * queue_ptr, const char * opath, uint64_t id)
  99 {
 100   struct ladish_command_remove_app * cmd_ptr;
 101   char * opath_dup;
 102
 103   if (!ladish_command_change_app_state(call_ptr, queue_ptr, opath, id, LADISH_APP_STATE_STOPPED))
 104   {
 105     goto fail;
 106   }
 107
 108   opath_dup = strdup(opath);
 109   if (opath_dup == NULL)
 110   {
 111     lash_dbus_error(call_ptr, LASH_DBUS_ERROR_GENERIC, "strdup('%s') failed.", opath);
 112     goto fail_drop_stop_command;
 113   }
 114
 115   cmd_ptr = ladish_command_new(sizeof(struct ladish_command_remove_app));
 116   if (cmd_ptr == NULL)
 117   {
 118     lash_dbus_error(call_ptr, LASH_DBUS_ERROR_GENERIC, "ladish_command_new() failed.");
 119     goto fail_free_opath;
 120   }
 121
 122   cmd_ptr->command.run = run;
 123   cmd_ptr->command.destructor = destructor;
 124   cmd_ptr->opath = opath_dup;
 125   cmd_ptr->id = id;
 126
 127   if (!ladish_cqueue_add_command(queue_ptr, &cmd_ptr->command))
 128   {
 129     lash_dbus_error(call_ptr, LASH_DBUS_ERROR_GENERIC, "ladish_cqueue_add_command() failed.");
 130     goto fail_destroy_command;
 131   }
 132
 133   return true;
 134
 135 fail_destroy_command:
 136   free(cmd_ptr);
 137 fail_free_opath:
 138   free(opath_dup);
 139 fail_drop_stop_command:
 140   ladish_cqueue_drop_command(queue_ptr);
 141 fail:
 142   return false;
 143 }