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qemu: Use atomic ops for driver->nactive

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This commit is contained in:
Jiri Denemark 2013-02-19 14:57:46 +01:00
parent 921af42980
commit 5d6f636764
2 changed files with 6 additions and 9 deletions
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2
src/qemu/qemu_conf.h
View File

@ -168,7 +168,7 @@ struct _virQEMUDriver {
virCgroupPtr cgroup;
/* Atomic inc/dec only */
size_t nactive;
unsigned int nactive;
/* Immutable pointers. Caller must provide locking */
virStateInhibitCallback inhibitCallback;

13
src/qemu/qemu_process.c
View File

@ -69,6 +69,7 @@
#include "virtime.h"
#include "virnetdevtap.h"
#include "virbitmap.h"
#include "viratomic.h"
#define VIR_FROM_THIS VIR_FROM_QEMU
@ -3300,9 +3301,8 @@ qemuProcessReconnect(void *opaque)
goto error;
}
if (!driver->nactive && driver->inhibitCallback)
if (virAtomicIntInc(&driver->nactive) == 1 && driver->inhibitCallback)
driver->inhibitCallback(true, driver->inhibitOpaque);
driver->nactive++;
endjob:
if (!qemuDomainObjEndJob(driver, obj))
@ -3589,9 +3589,8 @@ int qemuProcessStart(virConnectPtr conn,
qemuDomainSetFakeReboot(driver, vm, false);
virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF, VIR_DOMAIN_SHUTOFF_UNKNOWN);
if (!driver->nactive && driver->inhibitCallback)
if (virAtomicIntInc(&driver->nactive) == 1 && driver->inhibitCallback)
driver->inhibitCallback(true, driver->inhibitOpaque);
driver->nactive++;
/* Run an early hook to set-up missing devices */
if (virHookPresent(VIR_HOOK_DRIVER_QEMU)) {
@ -4188,8 +4187,7 @@ void qemuProcessStop(virQEMUDriverPtr driver,
*/
vm->def->id = -1;
driver->nactive--;
if (!driver->nactive && driver->inhibitCallback)
if (virAtomicIntDecAndTest(&driver->nactive) && driver->inhibitCallback)
driver->inhibitCallback(false, driver->inhibitOpaque);
if ((logfile = qemuDomainCreateLog(driver, vm, true)) < 0) {
@ -4442,9 +4440,8 @@ int qemuProcessAttach(virConnectPtr conn ATTRIBUTE_UNUSED,
vm->def->id = qemuDriverAllocateID(driver);
if (!driver->nactive && driver->inhibitCallback)
if (virAtomicIntInc(&driver->nactive) == 1 && driver->inhibitCallback)
driver->inhibitCallback(true, driver->inhibitOpaque);
driver->nactive++;
if (virFileMakePath(cfg->logDir) < 0) {
virReportSystemError(errno,