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 85 extern HEIMDAL_MUTEX _heim_base_mutex; 86 87 #define heim_base_atomic_type unsigned int 88 89 static inline heim_base_atomic_type 90 heim_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 99 static inline heim_base_atomic_type 100 heim_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