base/baselocl.h

   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 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <errno.h>
  42 #include <limits.h>
  43
  44 #ifdef HAVE_UNISTD_H
  45 #include <unistd.h>
  46 #endif
  47
  48 #include "heimqueue.h"
  49 #include "heim_threads.h"
  50 #include "heimbase.h"
  51 #include "heimbasepriv.h"
  52
  53 #ifdef HAVE_DISPATCH_DISPATCH_H
  54 #include <dispatch/dispatch.h>
  55 #endif
  56
  57 #if defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH)
  58
  59 #define heim_base_atomic_inc(x) __sync_add_and_fetch((x), 1)
  60 #define heim_base_atomic_dec(x) __sync_sub_and_fetch((x), 1)
  61 #define heim_base_atomic_type   unsigned int
  62 #define heim_base_atomic_max    UINT_MAX
  63
  64 #define heim_base_exchange_pointer(t,v) __sync_lock_test_and_set((t), (v))
  65
  66 #elif defined(_WIN32)
  67
  68 #define heim_base_atomic_inc(x) InterlockedIncrement(x)
  69 #define heim_base_atomic_dec(x) InterlockedDecrement(x)
  70 #define heim_base_atomic_type   LONG
  71 #define heim_base_atomic_max    MAXLONG
  72
  73 #define heim_base_exchange_pointer(t,v) InterlockedExchangePointer((t),(v))
  74
  75 #else
  76
  77 #define HEIM_BASE_NEED_ATOMIC_MUTEX 1
  78 extern HEIMDAL_MUTEX _heim_base_mutex;
  79
  80 #define heim_base_atomic_type   unsigned int
  81
  82 static inline heim_base_atomic_type
  83 heim_base_atomic_inc(heim_base_atomic_type *x)
  84 {
  85     heim_base_atomic_type t;
  86     HEIMDAL_MUTEX_lock(&_heim_base_mutex);
  87     t = ++(*x);
  88     HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
  89     return t;
  90 }
  91
  92 static inline heim_base_atomic_type
  93 heim_base_atomic_dec(heim_base_atomic_type *x)
  94 {
  95     heim_base_atomic_type t;
  96     HEIMDAL_MUTEX_lock(&_heim_base_mutex);
  97     t = --(*x);
  98     HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
  99     return t;
 100 }
 101
 102 #define heim_base_atomic_max    UINT_MAX
 103
 104 #endif
 105
 106 /* tagged strings/object/XXX */
 107 #define heim_base_is_tagged(x) (((uintptr_t)(x)) & 0x3)
 108
 109 #define heim_base_is_tagged_object(x) ((((uintptr_t)(x)) & 0x3) == 1)
 110 #define heim_base_make_tagged_object(x, tid) \
 111     ((heim_object_t)((((uintptr_t)(x)) << 5) | ((tid) << 2) | 0x1))
 112 #define heim_base_tagged_object_tid(x) ((((uintptr_t)(x)) & 0x1f) >> 2)
 113 #define heim_base_tagged_object_value(x) (((uintptr_t)(x)) >> 5)
 114
 115 /*
 116  *
 117  */
 118
 119 #undef HEIMDAL_NORETURN_ATTRIBUTE
 120 #define HEIMDAL_NORETURN_ATTRIBUTE
 121 #undef HEIMDAL_PRINTF_ATTRIBUTE
 122 #define HEIMDAL_PRINTF_ATTRIBUTE(x)