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