1/*
2 * Copyright (c) 2010 Apple Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1.  Redistributions of source code must retain the above copyright
11 *     notice, this list of conditions and the following disclaimer.
12 * 2.  Redistributions in binary form must reproduce the above copyright
13 *     notice, this list of conditions and the following disclaimer in the
14 *     documentation and/or other materials provided with the distribution.
15 * 3.  Neither the name of Apple Inc. ("Apple") nor the names of its
16 *     contributors may be used to endorse or promote products derived from
17 *     this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * Portions of this software have been released under the following terms:
31 *
32 * (c) Copyright 1989-1993 OPEN SOFTWARE FOUNDATION, INC.
33 * (c) Copyright 1989-1993 HEWLETT-PACKARD COMPANY
34 * (c) Copyright 1989-1993 DIGITAL EQUIPMENT CORPORATION
35 *
36 * To anyone who acknowledges that this file is provided "AS IS"
37 * without any express or implied warranty:
38 * permission to use, copy, modify, and distribute this file for any
39 * purpose is hereby granted without fee, provided that the above
40 * copyright notices and this notice appears in all source code copies,
41 * and that none of the names of Open Software Foundation, Inc., Hewlett-
42 * Packard Company or Digital Equipment Corporation be used
43 * in advertising or publicity pertaining to distribution of the software
44 * without specific, written prior permission.  Neither Open Software
45 * Foundation, Inc., Hewlett-Packard Company nor Digital
46 * Equipment Corporation makes any representations about the suitability
47 * of this software for any purpose.
48 *
49 * Copyright (c) 2007, Novell, Inc. All rights reserved.
50 * Redistribution and use in source and binary forms, with or without
51 * modification, are permitted provided that the following conditions
52 * are met:
53 *
54 * 1.  Redistributions of source code must retain the above copyright
55 *     notice, this list of conditions and the following disclaimer.
56 * 2.  Redistributions in binary form must reproduce the above copyright
57 *     notice, this list of conditions and the following disclaimer in the
58 *     documentation and/or other materials provided with the distribution.
59 * 3.  Neither the name of Novell Inc. nor the names of its contributors
60 *     may be used to endorse or promote products derived from this
61 *     this software without specific prior written permission.
62 *
63 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
64 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
65 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
66 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY
67 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
68 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
69 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
70 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
71 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
72 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
73 *
74 * @APPLE_LICENSE_HEADER_END@
75 */
76
77/*
78**
79**  NAME:
80**
81**      dgscall.h
82**
83**  FACILITY:
84**
85**      Remote Procedure Call (RPC)
86**
87**  ABSTRACT:
88**
89**  DG protocol service routines
90**
91**
92*/
93
94#ifndef _DGSCALL_H
95#define _DGSCALL_H
96
97/*
98 * R P C _ D G _ S C A L L _ R E L E A S E
99 *
100 * Decrement the reference count for the SCALL and
101 * NULL the reference.
102 */
103
104#define RPC_DG_SCALL_RELEASE(scall) { \
105    RPC_DG_CALL_LOCK_ASSERT(&(*(scall))->c); \
106    assert((*(scall))->c.refcnt > 0); \
107    if (--(*(scall))->c.refcnt == 0) \
108        rpc__dg_scall_free(*(scall)); \
109    else \
110        RPC_DG_CALL_UNLOCK(&(*(scall))->c); \
111    *(scall) = NULL; \
112}
113
114/*
115 * R P C _ D G _ S C A L L _ R E L E A S E _ N O _ U N L O C K
116 *
117 * Like RPC_DG_SCALL_RELEASE, except doesn't unlock the SCALL.  Note
118 * that the referencing counting model requires that this macro can be
119 * used iff the release will not be the "last one" (i.e., the one that
120 * would normally cause the SCALL to be freed).
121 */
122
123#define RPC_DG_SCALL_RELEASE_NO_UNLOCK(scall) { \
124    RPC_DG_CALL_LOCK_ASSERT(&(*(scall))->c); \
125    assert((*(scall))->c.refcnt > 1); \
126    --(*(scall))->c.refcnt; \
127    *(scall) = NULL; \
128}
129
130PRIVATE void rpc__dg_scall_free (rpc_dg_scall_p_t  /*scall*/);
131
132PRIVATE void rpc__dg_scall_reinit (
133        rpc_dg_scall_p_t  /*scall*/,
134        rpc_dg_sock_pool_elt_p_t  /*sp*/,
135        rpc_dg_recvq_elt_p_t  /*rqe*/
136    );
137
138PRIVATE rpc_dg_scall_p_t rpc__dg_scall_alloc (
139        rpc_dg_sct_elt_p_t  /*scte*/,
140        rpc_dg_sock_pool_elt_p_t  /*sp*/,
141        rpc_dg_recvq_elt_p_t  /*rqe*/
142    );
143
144PRIVATE rpc_dg_scall_p_t rpc__dg_scall_cbk_alloc (
145        rpc_dg_ccall_p_t  /*ccall*/,
146        rpc_dg_sock_pool_elt_p_t  /*sp*/,
147        rpc_dg_recvq_elt_p_t  /*rqe*/
148    );
149
150PRIVATE void rpc__dg_scall_orphan_call (
151	rpc_dg_scall_p_t  /*scall*/
152    );
153
154#endif /* _DGSCALL_H */
155