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Add exit notifiers.

Browse source 
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: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2010-06-04 14:08:07 +02:00 committed by Anthony Liguori
parent 4cf3e6f3d8
commit fd42deeb4c
2 changed files with 23 additions and 0 deletions
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4
sysemu.h
View file

@ -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);

19
vl.c
View file

@ -234,6 +234,9 @@ 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;
@ -1740,6 +1743,21 @@ static int debugcon_parse(const char *devname)
return 0;
}
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);
}
static const QEMUOption *lookup_opt(int argc, char **argv,
const char **poptarg, int *poptind)
{
@ -1804,6 +1822,7 @@ 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();