[libvirt] [PATCH 3/7] event: add API for requiring an event loop impl to be registered

Signed-off-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; --- po/POTFILES.in | 1 + src/util/virevent.c | 25 +++++++++++++++++++++++++ src/util/virevent.h | 2 ++ 3 files changed, 28 insertions(+) diff --git a/po/POTFILES.in b/po/POTFILES.in index debb51cd70..b396797ff2 100644 --- a/po/POTFILES.in +++ b/po/POTFILES.in @@ -238,6 +238,7 @@ @SRCDIR(a)/src/util/virdnsmasq.c @SRCDIR(a)/src/util/virerror.c @SRCDIR(a)/src/util/virerror.h +@SRCDIR(a)/src/util/virevent.c @SRCDIR(a)/src/util/vireventpoll.c @SRCDIR(a)/src/util/virfcp.c @SRCDIR(a)/src/util/virfdstream.c diff --git a/src/util/virevent.c b/src/util/virevent.c index 3cac9f9472..a86acf64c0 100644 --- a/src/util/virevent.c +++ b/src/util/virevent.c @@ -29,6 +29,9 @@ VIR_LOG_INIT("util.event"); + +#define VIR_FROM_THIS VIR_FROM_EVENT + static virEventAddHandleFunc addHandleImpl; static virEventUpdateHandleFunc updateHandleImpl; static virEventRemoveHandleFunc removeHandleImpl; @@ -251,6 +254,26 @@ void virEventRegisterImpl(virEventAddHandleFunc addHandle, removeTimeoutImpl = removeTimeout; } + +/** + * virEventRequireImpl: + * + * Require that there is an event loop implementation + * registered. + * + * Returns: -1 if no event loop is registered, 0 otherwise + */ +int virEventRequireImpl(void) +{ + if (!addHandleImpl || !addTimeoutImpl) { + virReportError(VIR_ERR_NO_SUPPORT, "%s", + _("An event loop implementation must be registered")); + return -1; + } + + return 0; +} + /** * virEventRegisterDefaultImpl: * @@ -276,6 +299,8 @@ int virEventRegisterDefaultImpl(void) { VIR_DEBUG("registering default event implementation"); + virInitialize(); + virResetLastError(); if (virEventPollInit() < 0) { diff --git a/src/util/virevent.h b/src/util/virevent.h index 0b4f7d2b1b..6c8fdcbac4 100644 --- a/src/util/virevent.h +++ b/src/util/virevent.h @@ -21,3 +21,5 @@ #pragma once #include "internal.h" + +int virEventRequireImpl(void); -- 2.23.0