hw/core/resetcontainer.c

   1 /*
   2  * Reset container
   3  *
   4  * Copyright (c) 2024 Linaro, Ltd
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9
  10 /*
  11  * The "reset container" is an object which implements the Resettable
  12  * interface. It contains a list of arbitrary other objects which also
  13  * implement Resettable. Resetting the reset container resets all the
  14  * objects in it.
  15  */
  16
  17 #include "qemu/osdep.h"
  18 #include "hw/resettable.h"
  19 #include "hw/core/resetcontainer.h"
  20
  21 struct ResettableContainer {
  22     Object parent;
  23     ResettableState reset_state;
  24     GPtrArray *children;
  25 };
  26
  27 OBJECT_DEFINE_SIMPLE_TYPE_WITH_INTERFACES(ResettableContainer, resettable_container, RESETTABLE_CONTAINER, OBJECT, { TYPE_RESETTABLE_INTERFACE }, { })
  28
  29 void resettable_container_add(ResettableContainer *rc, Object *obj)
  30 {
  31     INTERFACE_CHECK(void, obj, TYPE_RESETTABLE_INTERFACE);
  32     g_ptr_array_add(rc->children, obj);
  33 }
  34
  35 void resettable_container_remove(ResettableContainer *rc, Object *obj)
  36 {
  37     g_ptr_array_remove(rc->children, obj);
  38 }
  39
  40 static ResettableState *resettable_container_get_state(Object *obj)
  41 {
  42     ResettableContainer *rc = RESETTABLE_CONTAINER(obj);
  43     return &rc->reset_state;
  44 }
  45
  46 static void resettable_container_child_foreach(Object *obj,
  47                                                ResettableChildCallback cb,
  48                                                void *opaque, ResetType type)
  49 {
  50     ResettableContainer *rc = RESETTABLE_CONTAINER(obj);
  51     unsigned int len = rc->children->len;
  52
  53     for (unsigned int i = 0; i < len; i++) {
  54         cb(g_ptr_array_index(rc->children, i), opaque, type);
  55         /* Detect callbacks trying to unregister themselves */
  56         assert(len == rc->children->len);
  57     }
  58 }
  59
  60 static void resettable_container_init(Object *obj)
  61 {
  62     ResettableContainer *rc = RESETTABLE_CONTAINER(obj);
  63
  64     rc->children = g_ptr_array_new();
  65 }
  66
  67 static void resettable_container_finalize(Object *obj)
  68 {
  69 }
  70
  71 static void resettable_container_class_init(ObjectClass *klass, void *data)
  72 {
  73     ResettableClass *rc = RESETTABLE_CLASS(klass);
  74
  75     rc->get_state = resettable_container_get_state;
  76     rc->child_foreach = resettable_container_child_foreach;
  77 }