From patchwork Mon Mar 15 20:34:22 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anthony Liguori X-Patchwork-Id: 47780 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 9F9A0B7D53 for ; Tue, 16 Mar 2010 07:43:02 +1100 (EST) Received: from localhost ([127.0.0.1]:43908 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NrH2u-0005fy-0T for incoming@patchwork.ozlabs.org; Mon, 15 Mar 2010 16:37:52 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NrGzn-0004zv-Hg for qemu-devel@nongnu.org; Mon, 15 Mar 2010 16:34:39 -0400 Received: from [199.232.76.173] (port=53559 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NrGzn-0004zm-5Z for qemu-devel@nongnu.org; Mon, 15 Mar 2010 16:34:39 -0400 Received: from Debian-exim by monty-python.gnu.org with spam-scanned (Exim 4.60) (envelope-from ) id 1NrGzk-0008WN-Ty for qemu-devel@nongnu.org; Mon, 15 Mar 2010 16:34:38 -0400 Received: from e5.ny.us.ibm.com ([32.97.182.145]:46426) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1NrGzk-0008WF-Jk for qemu-devel@nongnu.org; Mon, 15 Mar 2010 16:34:36 -0400 Received: from d01relay01.pok.ibm.com (d01relay01.pok.ibm.com [9.56.227.233]) by e5.ny.us.ibm.com (8.14.3/8.13.1) with ESMTP id o2FKKMut016632 for ; Mon, 15 Mar 2010 16:20:22 -0400 Received: from d03av01.boulder.ibm.com (d03av01.boulder.ibm.com [9.17.195.167]) by d01relay01.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o2FKYYkD096770 for ; Mon, 15 Mar 2010 16:34:34 -0400 Received: from d03av01.boulder.ibm.com (loopback [127.0.0.1]) by d03av01.boulder.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id o2FKYUj0025045 for ; Mon, 15 Mar 2010 14:34:31 -0600 Received: from localhost.localdomain (sig-9-65-105-148.mts.ibm.com [9.65.105.148]) by d03av01.boulder.ibm.com (8.14.3/8.13.1/NCO v10.0 AVin) with ESMTP id o2FKYTdq024992; Mon, 15 Mar 2010 14:34:30 -0600 From: Anthony Liguori To: qemu-devel@nongnu.org Date: Mon, 15 Mar 2010 15:34:22 -0500 Message-Id: <1268685268-16881-1-git-send-email-aliguori@us.ibm.com> X-Mailer: git-send-email 1.6.5.2 X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) Cc: Avi Kivity , Anthony Liguori , Gerd Hoffman , Luiz Capitulino Subject: [Qemu-devel] [PATCH 1/7] Add support for generic notifier lists (v2) X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org 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 --- v1 -> v2 - Do not do memory allocations by placing list nodes in notifier --- Makefile.objs | 1 + notify.c | 39 +++++++++++++++++++++++++++++++++++++++ notify.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 83 insertions(+), 0 deletions(-) create mode 100644 notify.c create mode 100644 notify.h 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 --- /dev/null +++ b/notify.c @@ -0,0 +1,39 @@ +/* + * Notifier lists + * + * Copyright IBM, Corp. 2010 + * + * Authors: + * Anthony Liguori + * + * 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 --- /dev/null +++ b/notify.h @@ -0,0 +1,43 @@ +/* + * Notifier lists + * + * Copyright IBM, Corp. 2010 + * + * Authors: + * Anthony Liguori + * + * 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