2 * Copyright (C) 2009 Internet Systems Consortium, Inc. ("ISC")
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
10 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
13 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
14 * PERFORMANCE OF THIS SOFTWARE.
17 /* $Id: context.h,v 1.3 2009/09/02 23:48:02 tbox Exp $ */
20 #define IRS_CONTEXT_H 1
25 * The IRS context module provides an abstract interface to the DNS library
26 * with an application. An IRS context object initializes and holds various
27 * resources used in the DNS library.
30 #include <dns/types.h>
31 #include <irs/types.h>
36 irs_context_create(irs_context_t **contextp);
38 * Create an IRS context. It internally initializes the ISC and DNS libraries
39 * (if not yet), creates a DNS client object and initializes the client using
40 * the configuration files parsed via the 'resconf' and 'dnsconf' IRS modules.
41 * Some of the internally initialized objects can be used by the application
42 * via irs_context_getxxx() functions (see below).
46 *\li contextp != NULL && *contextp == NULL.
50 irs_context_get(irs_context_t **contextp);
52 * Return an IRS context for the calling thread. If no IRS context is
53 * associated to the thread, this function creates a new one by calling
54 * irs_context_create(), and associates it with the thread as a thread specific
55 * data value. This function is provided for standard libraries that are
56 * expected to be thread-safe but do not accept an appropriate IRS context
57 * as a library parameter, e.g., getaddrinfo().
61 *\li contextp != NULL && *contextp == NULL.
65 irs_context_destroy(irs_context_t **contextp);
67 * Destroy an IRS context.
71 *\li '*contextp' is a valid IRS context.
74 *\li '*contextp' == NULL.
78 irs_context_getmctx(irs_context_t *context);
80 * Return the memory context held in the context.
84 *\li 'context' is a valid IRS context.
88 irs_context_getappctx(irs_context_t *context);
90 * Return the application context held in the context.
94 *\li 'context' is a valid IRS context.
98 irs_context_gettaskmgr(irs_context_t *context);
100 * Return the task manager held in the context.
104 *\li 'context' is a valid IRS context.
108 irs_context_gettimermgr(irs_context_t *context);
110 * Return the timer manager held in the context.
114 *\li 'context' is a valid IRS context.
118 irs_context_gettask(irs_context_t *context);
120 * Return the task object held in the context.
124 *\li 'context' is a valid IRS context.
128 irs_context_getdnsclient(irs_context_t *context);
130 * Return the DNS client object held in the context.
134 *\li 'context' is a valid IRS context.
138 irs_context_getresconf(irs_context_t *context);
140 * Return the resolver configuration object held in the context.
144 *\li 'context' is a valid IRS context.
148 irs_context_getdnsconf(irs_context_t *context);
150 * Return the advanced DNS configuration object held in the context.
154 *\li 'context' is a valid IRS context.
159 #endif /* IRS_CONTEXT_H */