pthreads/pthread_machdep.h

   1 /*
   2  * Copyright (c) 2003-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
  25  *              All Rights Reserved
  26  *
  27  * Permission to use, copy, modify, and distribute this software and
  28  * its documentation for any purpose and without fee is hereby granted,
  29  * provided that the above copyright notice appears in all copies and
  30  * that both the copyright notice and this permission notice appear in
  31  * supporting documentation.
  32  *
  33  * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
  34  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  35  * FOR A PARTICULAR PURPOSE.
  36  *
  37  * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
  38  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  39  * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
  40  * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
  41  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  42  */
  43 /*
  44  * MkLinux
  45  */
  46
  47 /* Machine-dependent definitions for pthread internals. */
  48
  49 #ifndef _POSIX_PTHREAD_MACHDEP_H
  50 #define _POSIX_PTHREAD_MACHDEP_H
  51
  52 #ifdef __LP64__
  53 #define _PTHREAD_TSD_OFFSET 0x60
  54 #else
  55 #define _PTHREAD_TSD_OFFSET 0x48
  56 #endif  /* __LP64__ */
  57
  58 #ifndef __ASSEMBLER__
  59
  60 #include <System/machine/cpu_capabilities.h>
  61
  62 /*
  63 ** Define macros for inline pthread_getspecific() usage.
  64 ** We reserve a number of slots for Apple internal use.
  65 ** This number can grow dynamically, no need to fix it.
  66 */
  67
  68 /* This header contains pre defined thread specific keys */
  69 /* 0 is used for pthread_self */
  70 #define _PTHREAD_TSD_SLOT_PTHREAD_SELF          0
  71 /* Keys 1- 9 for use by dyld, directly or indirectly */
  72 #define _PTHREAD_TSD_SLOT_DYLD_1                1
  73 #define _PTHREAD_TSD_SLOT_DYLD_2                2
  74 #define _PTHREAD_TSD_SLOT_DYLD_3                3
  75 #define _PTHREAD_TSD_RESERVED_SLOT_COUNT        4
  76
  77 /* Keys 10 - 29 are for Libc/Libsystem internal ussage */
  78 /* used as __pthread_tsd_first + Num  */
  79 #define __PTK_LIBC_LOCALE_KEY           10
  80 #define __PTK_LIBC_TTYNAME_KEY          11
  81 #define __PTK_LIBC_LOCALTIME_KEY        12
  82 #define __PTK_LIBC_GMTIME_KEY           13
  83
  84
  85 /* Keys 30-255 for Non Libsystem usage */
  86 #define _PTHREAD_TSD_SLOT_OPENGL        30      /* backwards compat sake */
  87 #define __PTK_FRAMEWORK_OPENGL_KEY      30
  88
  89 /*
  90 ** Define macros for inline pthread_getspecific() usage.
  91 ** We reserve a number of slots for Apple internal use.
  92 ** This number can grow dynamically, no need to fix it.
  93 */
  94
  95
  96 #if defined(__cplusplus)
  97 extern "C" {
  98 #endif
  99
 100 extern void *pthread_getspecific(unsigned long);
 101 int       pthread_key_init_np(int, void (*)(void *));
 102
 103 #if defined(__cplusplus)
 104 }
 105 #endif
 106
 107 typedef int pthread_lock_t;
 108
 109 inline static int
 110 _pthread_has_direct_tsd(void)
 111 {
 112 #if defined(__ppc__)
 113         int *caps = (int *)_COMM_PAGE_CPU_CAPABILITIES;
 114         if (*caps & kFastThreadLocalStorage) {
 115                 return 1;
 116         } else {
 117                 return 0;
 118         }
 119 #else
 120         return 1;
 121 #endif
 122 }
 123
 124 inline static void *
 125 _pthread_getspecific_direct(unsigned long slot)
 126 {
 127         void *ret;
 128 #if defined(__OPTIMIZE__)
 129 #if defined(__i386__) || defined(__x86_64__)
 130         asm volatile("mov %%gs:%P1, %0" : "=r" (ret) : "i" (slot * sizeof(void *) + _PTHREAD_TSD_OFFSET));
 131 #elif defined(__ppc__)
 132         void **__pthread_tsd;
 133         asm volatile("mfspr %0, 259" : "=r" (__pthread_tsd));
 134         ret = __pthread_tsd[slot + (_PTHREAD_TSD_OFFSET / sizeof(void *))];
 135 #elif defined(__ppc64__)
 136         register void **__pthread_tsd asm ("r13");
 137         ret = __pthread_tsd[slot + (_PTHREAD_TSD_OFFSET / sizeof(void *))];
 138 #else
 139 #error no pthread_getspecific_direct implementation for this arch
 140 #endif
 141 #else /* ! __OPTIMIZATION__ */
 142         ret = pthread_getspecific(slot);
 143 #endif
 144         return ret;
 145 }
 146
 147 #define LOCK_INIT(l)    ((l) = 0)
 148 #define LOCK_INITIALIZER 0
 149
 150 #endif /* ! __ASSEMBLER__ */
 151 #endif /* _POSIX_PTHREAD_MACHDEP_H */