src/shims/tsd.h

   1 /*
   2  * Copyright (c) 2008-2011 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_APACHE_LICENSE_HEADER_START@
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  *
  18  * @APPLE_APACHE_LICENSE_HEADER_END@
  19  */
  20
  21 /*
  22  * IMPORTANT: This header file describes INTERNAL interfaces to libdispatch
  23  * which are subject to change in future releases of Mac OS X. Any applications
  24  * relying on these interfaces WILL break.
  25  */
  26
  27 #ifndef __DISPATCH_SHIMS_TSD__
  28 #define __DISPATCH_SHIMS_TSD__
  29
  30 #if HAVE_PTHREAD_MACHDEP_H
  31 #include <pthread_machdep.h>
  32 #endif
  33
  34 #define DISPATCH_TSD_INLINE DISPATCH_ALWAYS_INLINE_NDEBUG
  35
  36 #if USE_APPLE_TSD_OPTIMIZATIONS && HAVE_PTHREAD_KEY_INIT_NP && \
  37         !defined(DISPATCH_USE_DIRECT_TSD)
  38 #define DISPATCH_USE_DIRECT_TSD 1
  39 #endif
  40
  41 #if DISPATCH_USE_DIRECT_TSD
  42 static const unsigned long dispatch_queue_key           = __PTK_LIBDISPATCH_KEY0;
  43 static const unsigned long dispatch_sema4_key           = __PTK_LIBDISPATCH_KEY1;
  44 static const unsigned long dispatch_cache_key           = __PTK_LIBDISPATCH_KEY2;
  45 static const unsigned long dispatch_io_key                      = __PTK_LIBDISPATCH_KEY3;
  46 static const unsigned long dispatch_apply_key           = __PTK_LIBDISPATCH_KEY4;
  47 static const unsigned long dispatch_bcounter_key        = __PTK_LIBDISPATCH_KEY5;
  48
  49 DISPATCH_TSD_INLINE
  50 static inline void
  51 _dispatch_thread_key_create(const unsigned long *k, void (*d)(void *))
  52 {
  53         dispatch_assert_zero(pthread_key_init_np((int)*k, d));
  54 }
  55 #else
  56 extern pthread_key_t dispatch_queue_key;
  57 extern pthread_key_t dispatch_sema4_key;
  58 extern pthread_key_t dispatch_cache_key;
  59 extern pthread_key_t dispatch_io_key;
  60 extern pthread_key_t dispatch_apply_key;
  61 extern pthread_key_t dispatch_bcounter_key;
  62
  63 DISPATCH_TSD_INLINE
  64 static inline void
  65 _dispatch_thread_key_create(pthread_key_t *k, void (*d)(void *))
  66 {
  67         dispatch_assert_zero(pthread_key_create(k, d));
  68 }
  69 #endif
  70
  71 #if DISPATCH_USE_TSD_BASE && !DISPATCH_DEBUG
  72 #else // DISPATCH_USE_TSD_BASE
  73 DISPATCH_TSD_INLINE
  74 static inline void
  75 _dispatch_thread_setspecific(pthread_key_t k, void *v)
  76 {
  77 #if DISPATCH_USE_DIRECT_TSD
  78         if (_pthread_has_direct_tsd()) {
  79                 (void)_pthread_setspecific_direct(k, v);
  80                 return;
  81         }
  82 #endif
  83         dispatch_assert_zero(pthread_setspecific(k, v));
  84 }
  85
  86 DISPATCH_TSD_INLINE
  87 static inline void *
  88 _dispatch_thread_getspecific(pthread_key_t k)
  89 {
  90 #if DISPATCH_USE_DIRECT_TSD
  91         if (_pthread_has_direct_tsd()) {
  92                 return _pthread_getspecific_direct(k);
  93         }
  94 #endif
  95         return pthread_getspecific(k);
  96 }
  97 #endif // DISPATCH_USE_TSD_BASE
  98
  99 #define _dispatch_thread_self (uintptr_t)pthread_self
 100
 101 #undef DISPATCH_TSD_INLINE
 102
 103 #endif