qemu/qga/guest-agent-command-state.c

   1 /*
   2  * QEMU Guest Agent command state interfaces
   3  *
   4  * Copyright IBM Corp. 2011
   5  *
   6  * Authors:
   7  *  Michael Roth      <mdroth@linux.vnet.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12 #include <glib.h>
  13 #include "qga/guest-agent-core.h"
  14
  15 struct GACommandState {
  16     GSList *groups;
  17 };
  18
  19 typedef struct GACommandGroup {
  20     void (*init)(void);
  21     void (*cleanup)(void);
  22 } GACommandGroup;
  23
  24 /* handle init/cleanup for stateful guest commands */
  25
  26 void ga_command_state_add(GACommandState *cs,
  27                           void (*init)(void),
  28                           void (*cleanup)(void))
  29 {
  30     GACommandGroup *cg = g_malloc0(sizeof(GACommandGroup));
  31     cg->init = init;
  32     cg->cleanup = cleanup;
  33     cs->groups = g_slist_append(cs->groups, cg);
  34 }
  35
  36 static void ga_command_group_init(gpointer opaque, gpointer unused)
  37 {
  38     GACommandGroup *cg = opaque;
  39
  40     g_assert(cg);
  41     if (cg->init) {
  42         cg->init();
  43     }
  44 }
  45
  46 void ga_command_state_init_all(GACommandState *cs)
  47 {
  48     g_assert(cs);
  49     g_slist_foreach(cs->groups, ga_command_group_init, NULL);
  50 }
  51
  52 static void ga_command_group_cleanup(gpointer opaque, gpointer unused)
  53 {
  54     GACommandGroup *cg = opaque;
  55
  56     g_assert(cg);
  57     if (cg->cleanup) {
  58         cg->cleanup();
  59     }
  60 }
  61
  62 void ga_command_state_cleanup_all(GACommandState *cs)
  63 {
  64     g_assert(cs);
  65     g_slist_foreach(cs->groups, ga_command_group_cleanup, NULL);
  66 }
  67
  68 GACommandState *ga_command_state_new(void)
  69 {
  70     GACommandState *cs = g_malloc0(sizeof(GACommandState));
  71     cs->groups = NULL;
  72     return cs;
  73 }