1 /* $NetBSD: baselocl.h,v 1.2 2017/01/28 21:31:45 christos Exp $ */
2
3 /*
4 * Copyright (c) 2010 - 2011 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 #include <krb5/roken.h>
41
42 #ifdef HAVE_SYS_SELECT_H
43 #include <sys/select.h>
44 #endif
45
46 #define HEIMDAL_TEXTDOMAIN "heimdal_krb5"
47
48 #ifdef LIBINTL
49 #include <libintl.h>
50 #define N_(x,y) dgettext(HEIMDAL_TEXTDOMAIN, x)
51 #else
52 #define N_(x,y) (x)
53 #define bindtextdomain(package, localedir)
54 #endif
55
56 #include "heimqueue.h"
57 #include "heim_threads.h"
58 #include <krb5/heimbase.h>
59 #include "heimbasepriv.h"
60
61 #ifdef HAVE_DISPATCH_DISPATCH_H
62 #include <dispatch/dispatch.h>
63 #endif
64
65 #if defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH)
66
67 #define heim_base_atomic_inc(x) __sync_add_and_fetch((x), 1)
68 #define heim_base_atomic_dec(x) __sync_sub_and_fetch((x), 1)
69 #define heim_base_atomic_type unsigned int
70 #define heim_base_atomic_max UINT_MAX
71
72 #ifndef __has_builtin
73 #define __has_builtin(x) 0
74 #endif
75
76 #if __has_builtin(__sync_swap)
77 #define heim_base_exchange_pointer(t,v) __sync_swap((t), (v))
78 #else
79 #define heim_base_exchange_pointer(t,v) __sync_lock_test_and_set((t), (v))
80 #endif
81
82 #elif defined(__sun)
83
84 #include <sys/atomic.h>
85
86 #define heim_base_atomic_inc(x) atomic_inc_uint_nv((volatile uint_t *)(x))
87 #define heim_base_atomic_dec(x) atomic_dec_uint_nv((volatile uint_t *)(x))
88 #define heim_base_atomic_type uint_t
89 #define heim_base_atomic_max UINT_MAX
90
91 #define heim_base_exchange_pointer(t,v) atomic_swap_ptr((volatile void *)(t), (void *)(v))
92
93 #elif defined(_AIX)
94
95 #include <sys/atomic_op.h>
96
97 #define heim_base_atomic_inc(x) (fetch_and_add((atomic_p)(x)) + 1)
98 #define heim_base_atomic_dec(x) (fetch_and_add((atomic_p)(x)) - 1)
99 #define heim_base_atomic_type unsigned int
100 #define heim_base_atomic_max UINT_MAX
101
102 static inline void *
heim_base_exchange_pointer(void * p,void * newval)103 heim_base_exchange_pointer(void *p, void *newval)
104 {
105 void *val = *(void **)p;
106
107 while (!compare_and_swaplp((atomic_l)p, (long *)&val, (long)newval))
108 ;
109
110 return val;
111 }
112
113 #elif defined(_WIN32)
114
115 #define heim_base_atomic_inc(x) InterlockedIncrement(x)
116 #define heim_base_atomic_dec(x) InterlockedDecrement(x)
117 #define heim_base_atomic_type LONG
118 #define heim_base_atomic_max MAXLONG
119
120 #define heim_base_exchange_pointer(t,v) InterlockedExchangePointer((t),(v))
121
122 #else
123
124 #define HEIM_BASE_NEED_ATOMIC_MUTEX 1
125 extern HEIMDAL_MUTEX _heim_base_mutex;
126
127 #define heim_base_atomic_type unsigned int
128
129 static inline heim_base_atomic_type
heim_base_atomic_inc(heim_base_atomic_type * x)130 heim_base_atomic_inc(heim_base_atomic_type *x)
131 {
132 heim_base_atomic_type t;
133 HEIMDAL_MUTEX_lock(&_heim_base_mutex);
134 t = ++(*x);
135 HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
136 return t;
137 }
138
139 static inline heim_base_atomic_type
heim_base_atomic_dec(heim_base_atomic_type * x)140 heim_base_atomic_dec(heim_base_atomic_type *x)
141 {
142 heim_base_atomic_type t;
143 HEIMDAL_MUTEX_lock(&_heim_base_mutex);
144 t = --(*x);
145 HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
146 return t;
147 }
148
149 #define heim_base_atomic_max UINT_MAX
150
151 #endif
152
153 /* tagged strings/object/XXX */
154 #define heim_base_is_tagged(x) (((uintptr_t)(x)) & 0x3)
155
156 #define heim_base_is_tagged_object(x) ((((uintptr_t)(x)) & 0x3) == 1)
157 #define heim_base_make_tagged_object(x, tid) \
158 ((heim_object_t)((((uintptr_t)(x)) << 5) | ((tid) << 2) | 0x1))
159 #define heim_base_tagged_object_tid(x) ((((uintptr_t)(x)) & 0x1f) >> 2)
160 #define heim_base_tagged_object_value(x) (((uintptr_t)(x)) >> 5)
161
162 /*
163 *
164 */
165
166 #undef HEIMDAL_NORETURN_ATTRIBUTE
167 #define HEIMDAL_NORETURN_ATTRIBUTE
168 #undef HEIMDAL_PRINTF_ATTRIBUTE
169 #define HEIMDAL_PRINTF_ATTRIBUTE(x)
170