tree e85bbd366560bb67a778b60acabd904ca2004d94
parent c7c4d063f50f0de980d99f02e055722227d703bc
author Liu Ping Fan <qemulist@gmail.com> 1380090060 +0800
committer Paolo Bonzini <pbonzini@redhat.com> 1382023856 +0200

timer: make qemu_clock_enable sync between disable and timer's cb

After disabling the QemuClock, we should make sure that no QemuTimers
are still in flight. To implement that with light overhead, we resort
to QemuEvent. The caller of disabling will wait on QemuEvent of each
timerlist.

Note, qemu_clock_enable(foo,false) can _not_ be called from timer's cb.
Also, the callers of qemu_clock_enable() should be protected by the BQL.

Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>