d1e70c5e6d
Notifiers are data-less callbacks and a notifier list is a list of registered notifiers that all are interested in a particular event. We'll use this in a few patches to implement mouse change notification. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> --- v1 -> v2 - Do not do memory allocations by placing list nodes in notifier
44 lines
857 B
C
44 lines
857 B
C
/*
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* Notifier lists
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_NOTIFY_H
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#define QEMU_NOTIFY_H
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#include "qemu-queue.h"
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typedef struct Notifier Notifier;
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struct Notifier
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{
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void (*notify)(Notifier *notifier);
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QTAILQ_ENTRY(Notifier) node;
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};
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typedef struct NotifierList
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{
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QTAILQ_HEAD(, Notifier) notifiers;
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} NotifierList;
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#define NOTIFIER_LIST_INITIALIZER(head) \
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{ QTAILQ_HEAD_INITIALIZER((head).notifiers) }
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void notifier_list_init(NotifierList *list);
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void notifier_list_add(NotifierList *list, Notifier *notifier);
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void notifier_list_remove(NotifierList *list, Notifier *notifier);
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void notifier_list_notify(NotifierList *list);
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#endif
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