1/* 2 * Copyright (c) 2010 - 2011 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 <string.h> 50#include <limits.h> 51 52#ifdef HAVE_UNISTD_H 53#include <unistd.h> 54#endif 55 56#include "heimqueue.h" 57#include "heim_threads.h" 58#include "heimbase.h" 59#include "heimbasepriv.h" 60#include "heimbase_impl.h" 61 62#ifdef HAVE_DISPATCH_DISPATCH_H 63#include <dispatch/dispatch.h> 64#endif 65 66#if defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH) 67 68#define heim_base_atomic_inc(x) __sync_add_and_fetch((x), 1) 69#define heim_base_atomic_dec(x) __sync_sub_and_fetch((x), 1) 70#define heim_base_atomic_type unsigned int 71#define heim_base_atomic_max UINT_MAX 72 73#ifndef __has_builtin 74#define __has_builtin(x) 0 75#endif 76 77#if __has_builtin(__sync_swap) 78#define heim_base_exchange_pointer(t,v) __sync_swap((t), (v)) 79#else 80#define heim_base_exchange_pointer(t,v) __sync_lock_test_and_set((t), (v)) 81#endif 82 83#elif defined(_WIN32) 84 85#define heim_base_atomic_inc(x) InterlockedIncrement(x) 86#define heim_base_atomic_dec(x) InterlockedDecrement(x) 87#define heim_base_atomic_type LONG 88#define heim_base_atomic_max MAXLONG 89 90#define heim_base_exchange_pointer(t,v) InterlockedExchangePointer((t),(v)) 91 92#else 93 94#define HEIM_BASE_NEED_ATOMIC_MUTEX 1 95extern HEIMDAL_MUTEX _heim_base_mutex; 96 97#define heim_base_atomic_type unsigned int 98 99static inline heim_base_atomic_type 100heim_base_atomic_inc(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 109static inline heim_base_atomic_type 110heim_base_atomic_dec(heim_base_atomic_type *x) 111{ 112 heim_base_atomic_type t; 113 HEIMDAL_MUTEX_lock(&_heim_base_mutex); 114 t = --(*x); 115 HEIMDAL_MUTEX_unlock(&_heim_base_mutex); 116 return t; 117} 118 119#define heim_base_atomic_max UINT_MAX 120 121#endif 122 123/* tagged strings/object/XXX */ 124#define heim_base_is_tagged(x) (((uintptr_t)(x)) & 0x3) 125 126#define heim_base_is_tagged_object(x) ((((uintptr_t)(x)) & 0x3) == 1) 127#define heim_base_make_tagged_object(x, tid) \ 128 ((heim_object_t)((((uintptr_t)(x)) << 5) | ((tid) << 2) | 0x1)) 129#define heim_base_tagged_object_tid(x) ((((uintptr_t)(x)) & 0x1f) >> 2) 130#define heim_base_tagged_object_value(x) (((uintptr_t)(x)) >> 5) 131 132/* 133 * 134 */ 135 136#undef HEIMDAL_NORETURN_ATTRIBUTE 137#define HEIMDAL_NORETURN_ATTRIBUTE 138#undef HEIMDAL_PRINTF_ATTRIBUTE 139#define HEIMDAL_PRINTF_ATTRIBUTE(x) 140