pthread_machdep.h   [plain text]

/*
 * Copyright (c) 2003-2004, 2008 Apple Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991  
 *              All Rights Reserved 
 *  
 * Permission to use, copy, modify, and distribute this software and 
 * its documentation for any purpose and without fee is hereby granted, 
 * provided that the above copyright notice appears in all copies and 
 * that both the copyright notice and this permission notice appear in 
 * supporting documentation. 
 *  
 * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE 
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
 * FOR A PARTICULAR PURPOSE. 
 *  
 * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR 
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, 
 * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION 
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 
 */
/*
 * MkLinux
 */

/* Machine-dependent definitions for pthread internals. */

#ifndef _POSIX_PTHREAD_MACHDEP_H
#define _POSIX_PTHREAD_MACHDEP_H

#ifdef __LP64__
#define _PTHREAD_TSD_OFFSET 0x60
#else
#define _PTHREAD_TSD_OFFSET 0x48
#endif  /* __LP64__ */

#ifndef __ASSEMBLER__

#include <System/machine/cpu_capabilities.h>
#ifdef __arm__
#include <arm/arch.h>
#endif

/*
** Define macros for inline pthread_getspecific() usage.
** We reserve a number of slots for Apple internal use.
** This number can grow dynamically, no need to fix it.
*/

/* This header contains pre defined thread specific keys */
/* 0 is used for pthread_self */
#define _PTHREAD_TSD_SLOT_PTHREAD_SELF		0
/* Keys 1- 9 for use by dyld, directly or indirectly */
#define _PTHREAD_TSD_SLOT_DYLD_1		1
#define _PTHREAD_TSD_SLOT_DYLD_2		2
#define _PTHREAD_TSD_SLOT_DYLD_3		3
#define _PTHREAD_TSD_RESERVED_SLOT_COUNT	4

/* Keys 10 - 29 are for Libc/Libsystem internal ussage */
/* used as __pthread_tsd_first + Num  */
#define __PTK_LIBC_LOCALE_KEY		10
#define __PTK_LIBC_TTYNAME_KEY		11
#define __PTK_LIBC_LOCALTIME_KEY	12
#define __PTK_LIBC_GMTIME_KEY		13
#define __PTK_LIBC_GDTOA_BIGINT_KEY	14
#define __PTK_LIBC_PARSEFLOAT_KEY	15

/* Keys 20-25 for libdispactch usage */
#define __PTK_LIBDISPATCH_KEY0		20
#define __PTK_LIBDISPATCH_KEY1		21
#define __PTK_LIBDISPATCH_KEY2		22
#define __PTK_LIBDISPATCH_KEY3		23
#define __PTK_LIBDISPATCH_KEY4		24
#define __PTK_LIBDISPATCH_KEY5		25

/* Keys 30-255 for Non Libsystem usage */

/* Keys 30-39 for Graphic frameworks usage */
#define _PTHREAD_TSD_SLOT_OPENGL	30	/* backwards compat sake */
#define __PTK_FRAMEWORK_OPENGL_KEY	30
#define __PTK_FRAMEWORK_GRAPHICS_KEY1	31  
#define __PTK_FRAMEWORK_GRAPHICS_KEY2	32  
#define __PTK_FRAMEWORK_GRAPHICS_KEY3	33  
#define __PTK_FRAMEWORK_GRAPHICS_KEY4	34  
#define __PTK_FRAMEWORK_GRAPHICS_KEY5	35  
#define __PTK_FRAMEWORK_GRAPHICS_KEY6	36  
#define __PTK_FRAMEWORK_GRAPHICS_KEY7	37  
#define __PTK_FRAMEWORK_GRAPHICS_KEY8	38  
#define __PTK_FRAMEWORK_GRAPHICS_KEY9	39

/* Keys 40-49 for Objective-C runtime usage */
#define __PTK_FRAMEWORK_OBJC_KEY0	40  
#define __PTK_FRAMEWORK_OBJC_KEY1	41
#define __PTK_FRAMEWORK_OBJC_KEY2  	42
#define __PTK_FRAMEWORK_OBJC_KEY3  	43
#define __PTK_FRAMEWORK_OBJC_KEY4  	44
#define __PTK_FRAMEWORK_OBJC_KEY5  	45
#define __PTK_FRAMEWORK_OBJC_KEY6  	46
#define __PTK_FRAMEWORK_OBJC_KEY7  	47
#define __PTK_FRAMEWORK_OBJC_KEY8	48
#define __PTK_FRAMEWORK_OBJC_KEY9  	49

/* Keys 50-59 for Core Foundation usage */
#define __PTK_FRAMEWORK_COREFOUNDATION_KEY0	50
#define __PTK_FRAMEWORK_COREFOUNDATION_KEY1	51
#define __PTK_FRAMEWORK_COREFOUNDATION_KEY2	52
#define __PTK_FRAMEWORK_COREFOUNDATION_KEY3	53
#define __PTK_FRAMEWORK_COREFOUNDATION_KEY4	54
#define __PTK_FRAMEWORK_COREFOUNDATION_KEY5	55
#define __PTK_FRAMEWORK_COREFOUNDATION_KEY6	56
#define __PTK_FRAMEWORK_COREFOUNDATION_KEY7	57
#define __PTK_FRAMEWORK_COREFOUNDATION_KEY8	58
#define __PTK_FRAMEWORK_COREFOUNDATION_KEY9	59

/* Keys 60-69 for Foundation usage */
#define __PTK_FRAMEWORK_FOUNDATION_KEY0		60
#define __PTK_FRAMEWORK_FOUNDATION_KEY1		61
#define __PTK_FRAMEWORK_FOUNDATION_KEY2		62
#define __PTK_FRAMEWORK_FOUNDATION_KEY3		63
#define __PTK_FRAMEWORK_FOUNDATION_KEY4		64
#define __PTK_FRAMEWORK_FOUNDATION_KEY5		65
#define __PTK_FRAMEWORK_FOUNDATION_KEY6		66
#define __PTK_FRAMEWORK_FOUNDATION_KEY7		67
#define __PTK_FRAMEWORK_FOUNDATION_KEY8		68
#define __PTK_FRAMEWORK_FOUNDATION_KEY9		69

/* Keys 70-79 for Core Animation/QuartzCore usage */
#define __PTK_FRAMEWORK_QUARTZCORE_KEY0		70
#define __PTK_FRAMEWORK_QUARTZCORE_KEY1		71
#define __PTK_FRAMEWORK_QUARTZCORE_KEY2		72
#define __PTK_FRAMEWORK_QUARTZCORE_KEY3		73
#define __PTK_FRAMEWORK_QUARTZCORE_KEY4		74
#define __PTK_FRAMEWORK_QUARTZCORE_KEY5		75
#define __PTK_FRAMEWORK_QUARTZCORE_KEY6		76
#define __PTK_FRAMEWORK_QUARTZCORE_KEY7		77
#define __PTK_FRAMEWORK_QUARTZCORE_KEY8		78
#define __PTK_FRAMEWORK_QUARTZCORE_KEY9		79


/* Keys 80-89 for Garbage Collection */
#define __PTK_FRAMEWORK_GC_KEY0		80
#define __PTK_FRAMEWORK_GC_KEY1		81
#define __PTK_FRAMEWORK_GC_KEY2		82
#define __PTK_FRAMEWORK_GC_KEY3		83
#define __PTK_FRAMEWORK_GC_KEY4		84
#define __PTK_FRAMEWORK_GC_KEY5		85
#define __PTK_FRAMEWORK_GC_KEY6		86
#define __PTK_FRAMEWORK_GC_KEY7		87
#define __PTK_FRAMEWORK_GC_KEY8		88
#define __PTK_FRAMEWORK_GC_KEY9		89


/*
** Define macros for inline pthread_getspecific() usage.
** We reserve a number of slots for Apple internal use.
** This number can grow dynamically, no need to fix it.
*/


#if defined(__cplusplus)
extern "C" {
#endif

extern void *pthread_getspecific(unsigned long);
/* setup destructor function for static key as it is not created with pthread_key_create() */
int       pthread_key_init_np(int, void (*)(void *));

#if defined(__cplusplus)
}
#endif

typedef int pthread_lock_t;

inline static int
_pthread_has_direct_tsd(void)
{
#if defined(__ppc__)
	int *caps = (int *)_COMM_PAGE_CPU_CAPABILITIES;
	if (*caps & kFastThreadLocalStorage) {
		return 1;
	} else {
		return 0;
	}
#elif defined(__arm__) && defined(__thumb__) && defined(_ARM_ARCH_6) && !defined(_ARM_ARCH_7)
	return 0;
#else
	return 1;
#endif
}
	
/* To be used with static constant keys only */
inline static void *
_pthread_getspecific_direct(unsigned long slot) 
{
        void *ret;
#if defined(__i386__) || defined(__x86_64__)
#if defined(__OPTIMIZE__)
        asm volatile("mov %%gs:%P1, %0" : "=r" (ret) : "i" (slot * sizeof(void *) + _PTHREAD_TSD_OFFSET));
#else
        asm("mov %%gs:%P2(,%1,%P3), %0" : "=r" (ret) : "r" (slot), "i" (_PTHREAD_TSD_OFFSET), "i" (sizeof (void *)));
#endif
#elif defined(__ppc__) 
        void **__pthread_tsd;
        asm volatile("mfspr %0, 259" : "=r" (__pthread_tsd));
        ret = __pthread_tsd[slot + (_PTHREAD_TSD_OFFSET / sizeof(void *))];
#elif defined(__ppc64__)
        register void **__pthread_tsd asm ("r13");
        ret = __pthread_tsd[slot + (_PTHREAD_TSD_OFFSET / sizeof(void *))];
#elif defined(__arm__) && defined(_ARM_ARCH_6) && !defined(_ARM_ARCH_7) && defined(__thumb__) && !defined(__OPTIMIZE__)
        ret = pthread_getspecific(slot);
#elif defined(__arm__) && defined(_ARM_ARCH_6)
        void **__pthread_tsd;
        __asm__ ("mrc p15, 0, %0, c13, c0, 3" : "=r"(__pthread_tsd));
        ret = __pthread_tsd[slot + (_PTHREAD_TSD_OFFSET / sizeof(void *))];
#elif defined(__arm__) && !defined(_ARM_ARCH_6)
        register void **__pthread_tsd asm ("r9");
        ret = __pthread_tsd[slot + (_PTHREAD_TSD_OFFSET / sizeof(void *))];
#else     
#error no pthread_getspecific_direct implementation for this arch
#endif
        return ret;
}

/* To be used with static constant keys only */
#define _pthread_setspecific_direct(key, val) pthread_setspecific(key, val)

#define LOCK_INIT(l)	((l) = 0)
#define LOCK_INITIALIZER 0

#endif /* ! __ASSEMBLER__ */
#endif /* _POSIX_PTHREAD_MACHDEP_H */