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libxl: Use atomic ops for driver->nactive

This commit is contained in:
Jim Fehlig 2013-08-30 14:54:50 -06:00
parent d9f19c30d0
commit 6cd43d3654
2 changed files with 5 additions and 7 deletions
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2
src/libxl/libxl_conf.h
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@ -90,7 +90,7 @@ struct _libxlDriverPrivate {
* then lockless thereafter */
libxlDriverConfigPtr config;
size_t nactive;
unsigned int nactive;
virStateInhibitCallback inhibitCallback;
void *inhibitOpaque;

10
src/libxl/libxl_driver.c
View File

@ -50,6 +50,7 @@
#include "virstring.h"
#include "virsysinfo.h"
#include "viraccessapicheck.h"
#include "viratomic.h"
#define VIR_FROM_THIS VIR_FROM_LIBXL
@ -264,8 +265,7 @@ libxlVmCleanup(libxlDriverPrivatePtr driver,
virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF, reason);
}
driver->nactive--;
if (!driver->nactive && driver->inhibitCallback)
if (virAtomicIntDecAndTest(&driver->nactive) && driver->inhibitCallback)
driver->inhibitCallback(false, driver->inhibitOpaque);
if ((vm->def->ngraphics == 1) &&
@ -654,9 +654,8 @@ libxlVmStart(libxlDriverPrivatePtr driver, virDomainObjPtr vm,
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
goto error;
if (!driver->nactive && driver->inhibitCallback)
if (virAtomicIntInc(&driver->nactive) == 1 && driver->inhibitCallback)
driver->inhibitCallback(true, driver->inhibitOpaque);
driver->nactive++;
event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STARTED,
restore_fd < 0 ?
@ -726,9 +725,8 @@ libxlReconnectDomain(virDomainObjPtr vm,
vm->def->id = d_info.domid;
virDomainObjSetState(vm, VIR_DOMAIN_RUNNING, VIR_DOMAIN_RUNNING_UNKNOWN);
if (!driver->nactive && driver->inhibitCallback)
if (virAtomicIntInc(&driver->nactive) == 1 && driver->inhibitCallback)
driver->inhibitCallback(true, driver->inhibitOpaque);
driver->nactive++;
/* Recreate domain death et. al. events */
libxlCreateDomEvents(vm);