Commit d1e70c5e authored by Anthony Liguori's avatar Anthony Liguori

Add support for generic notifier lists

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: default avatarAnthony Liguori <aliguori@us.ibm.com>
---
v1 -> v2
 - Do not do memory allocations by placing list nodes in notifier
parent ddbda432
......@@ -104,6 +104,7 @@ common-obj-$(CONFIG_VNC_TLS) += vnc-tls.o vnc-auth-vencrypt.o
common-obj-$(CONFIG_VNC_SASL) += vnc-auth-sasl.o
common-obj-$(CONFIG_COCOA) += cocoa.o
common-obj-$(CONFIG_IOTHREAD) += qemu-thread.o
common-obj-y += notify.o
slirp-obj-y = cksum.o if.o ip_icmp.o ip_input.o ip_output.o
slirp-obj-y += slirp.o mbuf.o misc.o sbuf.o socket.o tcp_input.o tcp_output.o
......
/*
* Notifier lists
*
* Copyright IBM, Corp. 2010
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#include "qemu-common.h"
#include "notify.h"
void notifier_list_init(NotifierList *list)
{
QTAILQ_INIT(&list->notifiers);
}
void notifier_list_add(NotifierList *list, Notifier *notifier)
{
QTAILQ_INSERT_HEAD(&list->notifiers, notifier, node);
}
void notifier_list_remove(NotifierList *list, Notifier *notifier)
{
QTAILQ_REMOVE(&list->notifiers, notifier, node);
}
void notifier_list_notify(NotifierList *list)
{
Notifier *notifier, *next;
QTAILQ_FOREACH_SAFE(notifier, &list->notifiers, node, next) {
notifier->notify(notifier);
}
}
/*
* Notifier lists
*
* Copyright IBM, Corp. 2010
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#ifndef QEMU_NOTIFY_H
#define QEMU_NOTIFY_H
#include "qemu-queue.h"
typedef struct Notifier Notifier;
struct Notifier
{
void (*notify)(Notifier *notifier);
QTAILQ_ENTRY(Notifier) node;
};
typedef struct NotifierList
{
QTAILQ_HEAD(, Notifier) notifiers;
} NotifierList;
#define NOTIFIER_LIST_INITIALIZER(head) \
{ QTAILQ_HEAD_INITIALIZER((head).notifiers) }
void notifier_list_init(NotifierList *list);
void notifier_list_add(NotifierList *list, Notifier *notifier);
void notifier_list_remove(NotifierList *list, Notifier *notifier);
void notifier_list_notify(NotifierList *list);
#endif
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