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authorAnthony Liguori <[email protected]>2010-03-09 19:16:14 (GMT)
committer Anthony Liguori <[email protected]>2010-03-19 20:27:32 (GMT)
commitd1e70c5e6d1472856c52969301247fe8c3c8389d (patch) (side-by-side diff)
treecf8518783ecd1737ea4eb00ac1be7c7ed4d048f0
parentddbda4323e2bdc7cb3925b0f4080f9eb836a09e8 (diff)
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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: Anthony Liguori <[email protected]> --- v1 -> v2 - Do not do memory allocations by placing list nodes in notifier
Diffstat (more/less context) (ignore whitespace changes)
-rw-r--r--Makefile.objs1
-rw-r--r--notify.c39
-rw-r--r--notify.h43
3 files changed, 83 insertions, 0 deletions
diff --git a/Makefile.objs b/Makefile.objs
index e791dd5..dcb5a92 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -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
diff --git a/notify.c b/notify.c
new file mode 100644
index 0000000..bcd3fc5
--- a/dev/null
+++ b/notify.c
@@ -0,0 +1,39 @@
+/*
+ * Notifier lists
+ *
+ * Copyright IBM, Corp. 2010
+ *
+ * Authors:
+ * Anthony Liguori <[email protected]>
+ *
+ * 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);
+ }
+}
diff --git a/notify.h b/notify.h
new file mode 100644
index 0000000..b40522f
--- a/dev/null
+++ b/notify.h
@@ -0,0 +1,43 @@
+/*
+ * Notifier lists
+ *
+ * Copyright IBM, Corp. 2010
+ *
+ * Authors:
+ * Anthony Liguori <[email protected]>
+ *
+ * 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