From 24ace787bd73066b79e107e3b32e0cc2cfc8ab41 Mon Sep 17 00:00:00 2001 Message-Id: <24ace787bd73066b79e107e3b32e0cc2cfc8ab41.1357726992.git.minovotn@redhat.com> In-Reply-To: <4f8efce613a639a3c1e3022c521d6c70b7154de8.1357726992.git.minovotn@redhat.com> References: <4f8efce613a639a3c1e3022c521d6c70b7154de8.1357726992.git.minovotn@redhat.com> From: Stefan Hajnoczi Date: Wed, 2 Jan 2013 15:02:29 +0100 Subject: [PATCH 06/16] event_notifier: add event_notifier_set RH-Author: Stefan Hajnoczi Message-id: <1357138959-1918-7-git-send-email-stefanha@redhat.com> Patchwork-id: 45519 O-Subject: [RHEL6.4 qemu-kvm PATCH v5 06/16] event_notifier: add event_notifier_set Bugzilla: 877836 RH-Acked-by: Laszlo Ersek RH-Acked-by: Michael S. Tsirkin RH-Acked-by: Paolo Bonzini From: Paolo Bonzini EventNotifier right now cannot be used as an inter-thread communication primitive. It only works if something else (the kernel) sets the eventfd. Add a primitive to signal an EventNotifier that another thread is waiting on. Signed-off-by: Paolo Bonzini Signed-off-by: Avi Kivity (cherry picked from commit 2ec10b952b40d287037a50387a8b66d9ccc5124b) The filename is event_notifier.c upstream but in RHEL it is the older hw/event_notifier.c filename, hence the conflict. Conflicts: event_notifier.c Signed-off-by: Stefan Hajnoczi --- hw/event_notifier.c | 7 +++++++ hw/event_notifier.h | 1 + 2 files changed, 8 insertions(+) Signed-off-by: Michal Novotny --- hw/event_notifier.c | 7 +++++++ hw/event_notifier.h | 1 + 2 files changed, 8 insertions(+) diff --git a/hw/event_notifier.c b/hw/event_notifier.c index fb9618c..10ffb65 100644 --- a/hw/event_notifier.c +++ b/hw/event_notifier.c @@ -39,6 +39,13 @@ int event_notifier_get_fd(EventNotifier *e) return e->fd; } +int event_notifier_set(EventNotifier *e) +{ + uint64_t value = 1; + int r = write(e->fd, &value, sizeof(value)); + return r == sizeof(value); +} + int event_notifier_test_and_clear(EventNotifier *e) { uint64_t value; diff --git a/hw/event_notifier.h b/hw/event_notifier.h index 24117ea..8d5735f 100644 --- a/hw/event_notifier.h +++ b/hw/event_notifier.h @@ -10,6 +10,7 @@ struct EventNotifier { int event_notifier_init(EventNotifier *, int active); void event_notifier_cleanup(EventNotifier *); int event_notifier_get_fd(EventNotifier *); +int event_notifier_set(EventNotifier *); int event_notifier_test_and_clear(EventNotifier *); int event_notifier_test(EventNotifier *); -- 1.7.11.7