From ea648e70a989cca190cd7403fe892fd2dcc290b4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 5 May 2024 20:37:14 +0200 Subject: Adding upstream version 1:9.11.5.P4+dfsg. Signed-off-by: Daniel Baumann --- lib/isc/event.c | 102 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 lib/isc/event.c (limited to 'lib/isc/event.c') diff --git a/lib/isc/event.c b/lib/isc/event.c new file mode 100644 index 0000000..500b6fd --- /dev/null +++ b/lib/isc/event.c @@ -0,0 +1,102 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + + +/*! + * \file + */ + +#include + +#include +#include +#include + +/*** + *** Events. + ***/ + +static void +destroy(isc_event_t *event) { + isc_mem_t *mctx = event->ev_destroy_arg; + + isc_mem_put(mctx, event, event->ev_size); +} + +isc_event_t * +isc_event_allocate(isc_mem_t *mctx, void *sender, isc_eventtype_t type, + isc_taskaction_t action, void *arg, size_t size) +{ + isc_event_t *event; + + REQUIRE(size >= sizeof(struct isc_event)); + REQUIRE(action != NULL); + + event = isc_mem_get(mctx, size); + if (event == NULL) + return (NULL); + + ISC_EVENT_INIT(event, size, 0, NULL, type, action, arg, + sender, destroy, mctx); + + return (event); +} + +isc_event_t * +isc_event_constallocate(isc_mem_t *mctx, void *sender, isc_eventtype_t type, + isc_taskaction_t action, const void *arg, size_t size) +{ + isc_event_t *event; + void *deconst_arg; + + REQUIRE(size >= sizeof(struct isc_event)); + REQUIRE(action != NULL); + + event = isc_mem_get(mctx, size); + if (event == NULL) + return (NULL); + + /* + * Removing the const attribute from "arg" is the best of two + * evils here. If the event->ev_arg member is made const, then + * it affects a great many users of the task/event subsystem + * which are not passing in an "arg" which starts its life as + * const. Changing isc_event_allocate() and isc_task_onshutdown() + * to not have "arg" prototyped as const (which is quite legitimate, + * because neither of those functions modify arg) can cause + * compiler whining anytime someone does want to use a const + * arg that they themselves never modify, such as with + * gcc -Wwrite-strings and using a string "arg". + */ + DE_CONST(arg, deconst_arg); + + ISC_EVENT_INIT(event, size, 0, NULL, type, action, deconst_arg, + sender, destroy, mctx); + + return (event); +} + +void +isc_event_free(isc_event_t **eventp) { + isc_event_t *event; + + REQUIRE(eventp != NULL); + event = *eventp; + REQUIRE(event != NULL); + + REQUIRE(!ISC_LINK_LINKED(event, ev_link)); + REQUIRE(!ISC_LINK_LINKED(event, ev_ratelink)); + + if (event->ev_destroy != NULL) + (event->ev_destroy)(event); + + *eventp = NULL; +} -- cgit v1.2.3