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[Qemu-devel] [RESENT PATCH] Add exit notifiers.
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [RESENT PATCH] Add exit notifiers. |
Date: |
Mon, 14 Jun 2010 17:27:21 +0200 |
Hook up any cleanup work which needs to be done here. Advantages over
using atexit(3):
(1) You get passed in a pointer to the notifier. If you embed that
into your state struct you can use container_of() to get get your
state info.
(2) You can unregister, say when un-plugging a device.
[ v2: move code out of #ifndef _WIN32 ]
Signed-off-by: Gerd Hoffmann <address@hidden>
---
sysemu.h | 4 ++++
vl.c | 19 +++++++++++++++++++
2 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/sysemu.h b/sysemu.h
index 346cccd..0bfbd6a 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -6,6 +6,7 @@
#include "qemu-option.h"
#include "qemu-queue.h"
#include "qemu-timer.h"
+#include "notify.h"
#ifdef _WIN32
#include <windows.h>
@@ -56,6 +57,9 @@ int qemu_powerdown_requested(void);
extern qemu_irq qemu_system_powerdown;
void qemu_system_reset(void);
+void qemu_add_exit_notifier(Notifier *notify);
+void qemu_remove_exit_notifier(Notifier *notify);
+
void do_savevm(Monitor *mon, const QDict *qdict);
int load_vmstate(const char *name);
void do_delvm(Monitor *mon, const QDict *qdict);
diff --git a/vl.c b/vl.c
index 9cf5334..5daeb7b 100644
--- a/vl.c
+++ b/vl.c
@@ -238,6 +238,9 @@ uint8_t qemu_uuid[16];
static QEMUBootSetHandler *boot_set_handler;
static void *boot_set_opaque;
+static NotifierList exit_notifiers =
+ NOTIFIER_LIST_INITIALIZER(exit_notifiers);
+
int kvm_allowed = 0;
uint32_t xen_domid;
enum xen_mode xen_mode = XEN_EMULATE;
@@ -1956,6 +1959,21 @@ static int balloon_parse(const char *arg)
return -1;
}
+void qemu_add_exit_notifier(Notifier *notify)
+{
+ notifier_list_add(&exit_notifiers, notify);
+}
+
+void qemu_remove_exit_notifier(Notifier *notify)
+{
+ notifier_list_remove(&exit_notifiers, notify);
+}
+
+static void qemu_run_exit_notifiers(void)
+{
+ notifier_list_notify(&exit_notifiers);
+}
+
char *qemu_find_file(int type, const char *name)
{
int len;
@@ -2287,6 +2305,7 @@ int main(int argc, char **argv, char **envp)
int show_vnc_port = 0;
int defconfig = 1;
+ atexit(qemu_run_exit_notifiers);
error_set_progname(argv[0]);
init_clocks();
--
1.6.5.2
- [Qemu-devel] [RESENT PATCH] Add exit notifiers.,
Gerd Hoffmann <=