00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/* $NetBSD: event.h,v 1.6 2014/12/10 04:38:00 christos Exp $ */
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/*
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* Copyright (C) 2004-2007, 2014 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 1998-2002 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* Id: event.h,v 1.34 2007/06/19 23:47:18 tbox Exp */
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#ifndef ISC_EVENT_H
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#define ISC_EVENT_H 1
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/*! \file isc/event.h */
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#include <isc/lang.h>
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#include <isc/types.h>
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/*****
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***** Events.
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*****/
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typedef void (*isc_eventdestructor_t)(isc_event_t *);
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#define ISC_EVENT_COMMON(ltype) \
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size_t ev_size; \
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unsigned int ev_attributes; \
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void * ev_tag; \
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isc_eventtype_t ev_type; \
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isc_taskaction_t ev_action; \
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void * ev_arg; \
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void * ev_sender; \
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isc_eventdestructor_t ev_destroy; \
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void * ev_destroy_arg; \
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ISC_LINK(ltype) ev_link
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/*%
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* Attributes matching a mask of 0x000000ff are reserved for the task library's
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* definition. Attributes of 0xffffff00 may be used by the application
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* or non-ISC libraries.
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*/
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#define ISC_EVENTATTR_NOPURGE 0x00000001
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/*%
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* The ISC_EVENTATTR_CANCELED attribute is intended to indicate
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* that an event is delivered as a result of a canceled operation
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* rather than successful completion, by mutual agreement
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* between the sender and receiver. It is not set or used by
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* the task system.
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*/
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#define ISC_EVENTATTR_CANCELED 0x00000002
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#define ISC_EVENT_INIT(event, sz, at, ta, ty, ac, ar, sn, df, da) \
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do { \
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(event)->ev_size = (sz); \
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(event)->ev_attributes = (at); \
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(event)->ev_tag = (ta); \
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(event)->ev_type = (ty); \
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(event)->ev_action = (ac); \
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(event)->ev_arg = (ar); \
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(event)->ev_sender = (sn); \
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(event)->ev_destroy = (df); \
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(event)->ev_destroy_arg = (da); \
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ISC_LINK_INIT((event), ev_link); \
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} while (/*CONSTCOND*/0)
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/*%
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* This structure is public because "subclassing" it may be useful when
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* defining new event types.
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*/
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struct isc_event {
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ISC_EVENT_COMMON(struct isc_event);
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};
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#define ISC_EVENTTYPE_FIRSTEVENT 0x00000000
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#define ISC_EVENTTYPE_LASTEVENT 0xffffffff
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#define ISC_EVENT_PTR(p) ((isc_event_t **)(void *)(p))
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ISC_LANG_BEGINDECLS
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isc_event_t *
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isc_event_allocate(isc_mem_t *mctx, void *sender, isc_eventtype_t type,
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isc_taskaction_t action, void *arg, size_t size);
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isc_event_t *
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isc_event_constallocate(isc_mem_t *mctx, void *sender, isc_eventtype_t type,
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isc_taskaction_t action, const void *arg, size_t size);
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/*%<
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* Allocate an event structure.
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*
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* Allocate and initialize in a structure with initial elements
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* defined by:
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*
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* \code
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* struct {
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* ISC_EVENT_COMMON(struct isc_event);
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* ...
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* };
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* \endcode
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*
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* Requires:
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*\li 'size' >= sizeof(struct isc_event)
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*\li 'action' to be non NULL
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*
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* Returns:
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*\li a pointer to a initialized structure of the requested size.
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*\li NULL if unable to allocate memory.
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*/
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void
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isc_event_free(isc_event_t **);
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ISC_LANG_ENDDECLS
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#endif /* ISC_EVENT_H */
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