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   uuid_t app_uuid;
  49
  50   ASSERT(cmd_ptr->command.state == LADISH_COMMAND_STATE_PENDING);
  51
  52   log_info("remove app command. opath='%s'", cmd_ptr->opath);
  53
  54   supervisor = ladish_studio_find_app_supervisor(cmd_ptr->opath);
  55   if (supervisor == NULL)
  56   {
  57     log_error("cannot find supervisor '%s' to remove app from", cmd_ptr->opath);
  58     ladish_notify_simple(LADISH_NOTIFY_URGENCY_HIGH, "Cannot remove app because of internal error (unknown supervisor)", NULL);
  59     return false;
  60   }
  61
  62   app = ladish_app_supervisor_find_app_by_id(supervisor, cmd_ptr->id);
  63   if (app == NULL)
  64   {
  65     log_error("App with ID %"PRIu64" not found and (remove)", cmd_ptr->id);
  66     ladish_notify_simple(LADISH_NOTIFY_URGENCY_HIGH, "Cannot remove app because it is not found", NULL);
  67     return false;
  68   }
  69
  70   app_name = ladish_app_get_name(app);
  71   ladish_app_get_uuid(app, app_uuid);
  72
  73   if (ladish_app_is_running(app))
  74   {
  75     if (cmd_ptr->command.state == LADISH_COMMAND_STATE_PENDING)
  76     {
  77       log_info("App %s is not stopped as it should", app_name);
  78       ladish_notify_simple(LADISH_NOTIFY_URGENCY_HIGH, "Cannot remove app because it is not stopped (because of internal error)", NULL);
  79     }
  80     return false;
  81   }
  82
  83   /* remove jclient and vclient for this app */
  84   log_info("Removing graph objects for app '%s'", app_name);
  85   ladish_virtualizer_remove_app(ladish_studio_get_jack_graph(), app_uuid, app_name);
  86
  87   ladish_app_supervisor_remove_app(supervisor, app);
  88   cmd_ptr->command.state = LADISH_COMMAND_STATE_DONE;
  89   return true;
  90 }
  91
  92 static void destructor(void * context)
  93 {
  94   log_info("remove_app command destructor");
  95   free(cmd_ptr->opath);
  96 }
  97
  98 #undef cmd_ptr
  99
 100 bool ladish_command_remove_app(void * call_ptr, struct ladish_cqueue * queue_ptr, const char * opath, uint64_t id)
 101 {
 102   struct ladish_command_remove_app * cmd_ptr;
 103   char * opath_dup;
 104
 105   if (!ladish_command_change_app_state(call_ptr, queue_ptr, opath, id, LADISH_APP_STATE_STOPPED))
 106   {
 107     goto fail;
 108   }
 109
 110   opath_dup = strdup(opath);
 111   if (opath_dup == NULL)
 112   {
 113     lash_dbus_error(call_ptr, LASH_DBUS_ERROR_GENERIC, "strdup('%s') failed.", opath);
 114     goto fail_drop_stop_command;
 115   }
 116
 117   cmd_ptr = ladish_command_new(sizeof(struct ladish_command_remove_app));
 118   if (cmd_ptr == NULL)
 119   {
 120     lash_dbus_error(call_ptr, LASH_DBUS_ERROR_GENERIC, "ladish_command_new() failed.");
 121     goto fail_free_opath;
 122   }
 123
 124   cmd_ptr->command.run = run;
 125   cmd_ptr->command.destructor = destructor;
 126   cmd_ptr->opath = opath_dup;
 127   cmd_ptr->id = id;
 128
 129   if (!ladish_cqueue_add_command(queue_ptr, &cmd_ptr->command))
 130   {
 131     lash_dbus_error(call_ptr, LASH_DBUS_ERROR_GENERIC, "ladish_cqueue_add_command() failed.");
 132     goto fail_destroy_command;
 133   }
 134
 135   return true;
 136
 137 fail_destroy_command:
 138   free(cmd_ptr);
 139 fail_free_opath:
 140   free(opath_dup);
 141 fail_drop_stop_command:
 142   ladish_cqueue_drop_command(queue_ptr);
 143 fail:
 144   return false;
 145 }