xref: /dragonfly/lib/libc/include/nscachedcli.h (revision 19fe1c42)
1 /*-
2  * Copyright (c) 2004 Michael Bushkov <bushman@rsu.ru>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD: src/lib/libc/include/nscachedcli.h,v 1.1 2006/04/28 12:03:35 ume Exp $
27  */
28 
29 #ifndef __NS_CACHED_CLI_H__
30 #define __NS_CACHED_CLI_H__
31 
32 /*
33  * This file contains API for working with caching daemon
34  */
35 
36 enum comm_element_t {
37 	CET_UNDEFINED = 0,
38 	CET_WRITE_REQUEST = 1,
39 	CET_WRITE_RESPONSE = 2,
40 	CET_READ_REQUEST = 3,
41 	CET_READ_RESPONSE = 4,
42 	CET_TRANSFORM_REQUEST = 5,
43 	CET_TRANSFORM_RESPONSE = 6,
44 	CET_MP_WRITE_SESSION_REQUEST = 7,
45 	CET_MP_WRITE_SESSION_RESPONSE = 8,
46 	CET_MP_WRITE_SESSION_WRITE_REQUEST = 9,
47 	CET_MP_WRITE_SESSION_WRITE_RESPONSE = 10,
48 	CET_MP_WRITE_SESSION_CLOSE_NOTIFICATION = 11,
49 	CET_MP_WRITE_SESSION_ABANDON_NOTIFICATION = 12,
50 	CET_MP_READ_SESSION_REQUEST = 13,
51 	CET_MP_READ_SESSION_RESPONSE = 14,
52 	CET_MP_READ_SESSION_READ_REQUEST = 15,
53 	CET_MP_READ_SESSION_READ_RESPONSE = 16,
54 	CET_MP_READ_SESSION_CLOSE_NOTIFICATION = 17
55 };
56 
57 struct cached_connection_params {
58 	char	*socket_path;
59 	struct	timeval	timeout;
60 };
61 
62 struct cached_connection_ {
63 	int	sockfd;
64 	int	read_queue;
65 	int	write_queue;
66 
67 	int	mp_flag;	/* shows if the connection is used for
68 				 * multipart operations */
69 };
70 
71 /* simple abstractions for not to write "struct" every time */
72 typedef struct cached_connection_	*cached_connection;
73 typedef struct cached_connection_	*cached_mp_write_session;
74 typedef struct cached_connection_	*cached_mp_read_session;
75 
76 #define	INVALID_CACHED_CONNECTION	(NULL)
77 #define	INVALID_CACHED_MP_WRITE_SESSION	(NULL)
78 #define	INVALID_CACHED_MP_READ_SESSION	(NULL)
79 
80 __BEGIN_DECLS
81 
82 /* initialization/destruction routines */
83 extern	cached_connection __open_cached_connection(
84 	struct cached_connection_params const *);
85 extern	void __close_cached_connection(cached_connection);
86 
87 /* simple read/write operations */
88 extern	int __cached_write(cached_connection, const char *, const char *,
89 	size_t, const char *, size_t);
90 extern	int __cached_read(cached_connection, const char *, const char *,
91 	size_t, char *, size_t *);
92 
93 /* multipart read/write operations */
94 extern	cached_mp_write_session __open_cached_mp_write_session(
95 	struct cached_connection_params const *, const char *);
96 extern	int __cached_mp_write(cached_mp_write_session, const char *, size_t);
97 extern	int __abandon_cached_mp_write_session(cached_mp_write_session);
98 extern	int __close_cached_mp_write_session(cached_mp_write_session);
99 
100 extern	cached_mp_read_session __open_cached_mp_read_session(
101 	struct cached_connection_params const *, const char *);
102 extern	int __cached_mp_read(cached_mp_read_session, char *, size_t *);
103 extern	int __close_cached_mp_read_session(cached_mp_read_session);
104 
105 __END_DECLS
106 
107 #endif
108