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 "qemu/osdep.h"
  13 #include <glib.h>
  14 #include "qga/guest-agent-core.h"
  15
  16 struct GACommandState {
  17     GSList *groups;
  18 };
  19
  20 typedef struct GACommandGroup {
  21     void (*init)(void);
  22     void (*cleanup)(void);
  23 } GACommandGroup;
  24
  25 /* handle init/cleanup for stateful guest commands */
  26
  27 void ga_command_state_add(GACommandState *cs,
  28                           void (*init)(void),
  29                           void (*cleanup)(void))
  30 {
  31     GACommandGroup *cg = g_new0(GACommandGroup, 1);
  32     cg->init = init;
  33     cg->cleanup = cleanup;
  34     cs->groups = g_slist_append(cs->groups, cg);
  35 }
  36
  37 static void ga_command_group_init(gpointer opaque, gpointer unused)
  38 {
  39     GACommandGroup *cg = opaque;
  40
  41     g_assert(cg);
  42     if (cg->init) {
  43         cg->init();
  44     }
  45 }
  46
  47 void ga_command_state_init_all(GACommandState *cs)
  48 {
  49     g_assert(cs);
  50     g_slist_foreach(cs->groups, ga_command_group_init, NULL);
  51 }
  52
  53 static void ga_command_group_cleanup(gpointer opaque, gpointer unused)
  54 {
  55     GACommandGroup *cg = opaque;
  56
  57     g_assert(cg);
  58     if (cg->cleanup) {
  59         cg->cleanup();
  60     }
  61 }
  62
  63 void ga_command_state_cleanup_all(GACommandState *cs)
  64 {
  65     g_assert(cs);
  66     g_slist_foreach(cs->groups, ga_command_group_cleanup, NULL);
  67 }
  68
  69 GACommandState *ga_command_state_new(void)
  70 {
  71     GACommandState *cs = g_new0(GACommandState, 1);
  72     cs->groups = NULL;
  73     return cs;
  74 }