1 /* $NetBSD: baselocl.h,v 1.3 2014/04/24 13:45:33 pettai Exp $ */
2
3 /*
4 * Copyright (c) 2010 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Portions Copyright (c) 2010 Apple Inc. All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 *
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * 3. Neither the name of the Institute nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38 #include "config.h"
39
40 #ifdef HAVE_SYS_TYPES_H
41 #include <sys/types.h>
42 #endif
43 #ifdef HAVE_SYS_SELECT_H
44 #include <sys/select.h>
45 #endif
46
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <string.h>
50 #include <errno.h>
51 #include <limits.h>
52
53 #ifdef HAVE_UNISTD_H
54 #include <unistd.h>
55 #endif
56
57 #include "heimqueue.h"
58 #include "heim_threads.h"
59 #include <krb5/heimbase.h>
60 #include "heimbasepriv.h"
61
62 #ifdef HAVE_DISPATCH_DISPATCH_H
63 #include <dispatch/dispatch.h>
64 #endif
65
66 #if defined(USE_ATOMIC_INCDEC)
67
68 #include <sys/atomic.h>
69 #define heim_base_atomic_inc(x) atomic_inc_32_nv((x))
70 #define heim_base_atomic_dec(x) atomic_dec_32_nv((x))
71 #define heim_base_atomic_type uint32_t
72 #define heim_base_atomic_max UINT32_MAX
73
74 #define heim_base_exchange_pointer(t,v) atomic_swap_ptr((t), (v))
75
76 #elif defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH)
77
78 #define heim_base_atomic_inc(x) __sync_add_and_fetch((x), 1)
79 #define heim_base_atomic_dec(x) __sync_sub_and_fetch((x), 1)
80 #define heim_base_atomic_type unsigned int
81 #define heim_base_atomic_max UINT_MAX
82
83 #define heim_base_exchange_pointer(t,v) __sync_lock_test_and_set((t), (v))
84
85 #elif defined(_WIN32)
86
87 #define heim_base_atomic_inc(x) InterlockedIncrement(x)
88 #define heim_base_atomic_dec(x) InterlockedDecrement(x)
89 #define heim_base_atomic_type LONG
90 #define heim_base_atomic_max MAXLONG
91
92 #define heim_base_exchange_pointer(t,v) InterlockedExchangePointer((t),(v))
93
94 #else
95
96 #define HEIM_BASE_NEED_ATOMIC_MUTEX 1
97 extern HEIMDAL_MUTEX _heim_base_mutex;
98
99 #define heim_base_atomic_type unsigned int
100
101 static inline heim_base_atomic_type
heim_base_atomic_inc(heim_base_atomic_type * x)102 heim_base_atomic_inc(heim_base_atomic_type *x)
103 {
104 heim_base_atomic_type t;
105 HEIMDAL_MUTEX_lock(&_heim_base_mutex);
106 t = ++(*x);
107 HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
108 return t;
109 }
110
111 static inline heim_base_atomic_type
heim_base_atomic_dec(heim_base_atomic_type * x)112 heim_base_atomic_dec(heim_base_atomic_type *x)
113 {
114 heim_base_atomic_type t;
115 HEIMDAL_MUTEX_lock(&_heim_base_mutex);
116 t = --(*x);
117 HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
118 return t;
119 }
120
121 #define heim_base_atomic_max UINT_MAX
122
123 #endif
124
125 /* tagged strings/object/XXX */
126 #define heim_base_is_tagged(x) (((uintptr_t)(x)) & 0x3)
127
128 #define heim_base_is_tagged_object(x) ((((uintptr_t)(x)) & 0x3) == 1)
129 #define heim_base_make_tagged_object(x, tid) \
130 ((heim_object_t)((((uintptr_t)(x)) << 5) | ((tid) << 2) | 0x1))
131 #define heim_base_tagged_object_tid(x) ((((uintptr_t)(x)) & 0x1f) >> 2)
132 #define heim_base_tagged_object_value(x) (((uintptr_t)(x)) >> 5)
133
134 /*
135 *
136 */
137
138 #undef HEIMDAL_NORETURN_ATTRIBUTE
139 #define HEIMDAL_NORETURN_ATTRIBUTE
140 #undef HEIMDAL_PRINTF_ATTRIBUTE
141 #define HEIMDAL_PRINTF_ATTRIBUTE(x)
142