[apple/libpthread.git] / src / pthread_tsd.c

/*
 * Copyright (c) 2000-2003, 2007, 2012 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
 */

/*
 * POSIX Pthread Library
 *   Thread Specific Data support
 *   NB: pthread_getspecific() is in a separate assembly file
 */

#include "internal.h"
#include <TargetConditionals.h>

#if !VARIANT_DYLD
// __pthread_tsd_first is first static key managed by libpthread.
// __pthread_tsd_max is the (observed) end of static key destructors.
// __pthread_tsd_start is the start of dynamic keys.
// __pthread_tsd_end is the end of dynamic keys.

static const int __pthread_tsd_first = __TSD_RESERVED_MAX + 1;
static int __pthread_tsd_max = __pthread_tsd_first;
static const int __pthread_tsd_start = _INTERNAL_POSIX_THREAD_KEYS_MAX;
static const int __pthread_tsd_end = _INTERNAL_POSIX_THREAD_KEYS_END;

static int __pthread_key_legacy_behaviour = 0;
static int __pthread_key_legacy_behaviour_log = 0;

// Omit support for pthread key destructors in the static archive for dyld.
// dyld does not create and destroy threads so these are not necessary.
//
// We store the bit-wise negation of the destructor so that a quick non-zero
// test can be used to determine if the destructor has been set, even if it is
// NULL. This means that a destructor of value ~0x0ull cannot be used. That
// shouldn't be a problem in practice since it isn't a valid function address.

static struct {
	uintptr_t destructor;
} _pthread_keys[_INTERNAL_POSIX_THREAD_KEYS_END];

static _pthread_lock tsd_lock = _PTHREAD_LOCK_INITIALIZER;

// The pthread_tsd destruction order can be reverted to the old (pre-10.11) order
// by setting this environment variable.
void
_pthread_key_global_init(const char *envp[])
{
	__pthread_key_legacy_behaviour = _simple_getenv(envp, "PTHREAD_KEY_LEGACY_DESTRUCTOR_ORDER") ? 1 : 0;
	__pthread_key_legacy_behaviour_log = _simple_getenv(envp, "PTHREAD_KEY_LEGACY_DESTRUCTOR_ORDER_LOG") ? 1 : 0;
}

// Returns true if successful, false if destructor was already set.
static bool
_pthread_key_set_destructor(pthread_key_t key, void (*destructor)(void *))
{
	uintptr_t *ptr = &_pthread_keys[key].destructor;
	uintptr_t value = ~(uintptr_t)destructor;
	if (*ptr == 0) {
		*ptr = value;
		return true;
	}
	return false;
}

// Returns true if successful, false if the destructor was not set.
static bool
_pthread_key_unset_destructor(pthread_key_t key)
{
	uintptr_t *ptr = &_pthread_keys[key].destructor;
	if (*ptr != 0) {
		*ptr = 0;
		return true;
	}
	return false;
}

// Returns true if successful, false if the destructor was not set.
static bool
_pthread_key_get_destructor(pthread_key_t key, void (**destructor)(void *))
{
	uintptr_t value = _pthread_keys[key].destructor;
	if (destructor) {
		*destructor = (void (*)(void *))(~value);
	}
	return (value != 0);
}

int
pthread_key_create(pthread_key_t *key, void (*destructor)(void *))
{
	int res = EAGAIN; // Returns EAGAIN if key cannot be allocated.
	pthread_key_t k;

	_PTHREAD_LOCK(tsd_lock);
	for (k = __pthread_tsd_start; k < __pthread_tsd_end; k++) {
		if (_pthread_key_set_destructor(k, destructor)) {
			*key = k;
			res = 0;
			break;
		}
	}
	_PTHREAD_UNLOCK(tsd_lock);

	return res;
}

int
pthread_key_delete(pthread_key_t key)
{
	int res = EINVAL; // Returns EINVAL if key is not allocated.

	_PTHREAD_LOCK(tsd_lock);
	if (key >= __pthread_tsd_start && key < __pthread_tsd_end) {
		if (_pthread_key_unset_destructor(key)) {
			struct _pthread *p;
			_PTHREAD_LOCK(_pthread_list_lock);
			TAILQ_FOREACH(p, &__pthread_head, plist) {
				// No lock for word-sized write.
				p->tsd[key] = 0;
			}
			_PTHREAD_UNLOCK(_pthread_list_lock);
			res = 0;
		}
	}
	_PTHREAD_UNLOCK(tsd_lock);

	return res;
}
#endif // !VARIANT_DYLD

int
pthread_setspecific(pthread_key_t key, const void *value)
{
	int res = EINVAL;

#if !VARIANT_DYLD
	if (key >= __pthread_tsd_first && key < __pthread_tsd_end) {
		bool created = _pthread_key_get_destructor(key, NULL);
		if (key < __pthread_tsd_start || created) {
			struct _pthread *self = pthread_self();
			self->tsd[key] = (void *)value;
			res = 0;

			if (key < __pthread_tsd_start) {
				// XXX: is this really necessary?
				_pthread_key_set_destructor(key, NULL);
			}
			if (key > self->max_tsd_key) {
				self->max_tsd_key = (int)key;
			}
		}
	}
#endif // !VARIANT_DYLD

	return res;
}

int
_pthread_setspecific_static(pthread_key_t key, void *value)
{
	int res = EINVAL;

#if !VARIANT_DYLD
	if (key < __pthread_tsd_start) {
		_pthread_setspecific_direct(key, value);
		res = 0;
	}
#endif // !VARIANT_DYLD

	return res;
}

void*
pthread_getspecific(pthread_key_t key)
{
	return _pthread_getspecific_direct(key);
}

#if !VARIANT_DYLD
static void
_pthread_tsd_cleanup_key(pthread_t self, pthread_key_t key)
{
	void (*destructor)(void *);
	if (_pthread_key_get_destructor(key, &destructor)) {
		void **ptr = &self->tsd[key];
		void *value = *ptr;
		if (value) {
			*ptr = NULL;
			if (destructor) {
				destructor(value);
			}
		}
	}
}
#endif // !VARIANT_DYLD

#import <_simple.h>
#import <dlfcn.h>

#if !VARIANT_DYLD
static void
_pthread_tsd_cleanup_new(pthread_t self)
{
	int j;

	// clean up all keys
	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
		pthread_key_t k;
		for (k = __pthread_tsd_start; k <= self->max_tsd_key; k++) {
			_pthread_tsd_cleanup_key(self, k);
		}

		for (k = __pthread_tsd_first; k <= __pthread_tsd_max; k++) {
			_pthread_tsd_cleanup_key(self, k);
		}
	}

	self->max_tsd_key = 0;
}

static void
_pthread_tsd_behaviour_check(pthread_t self)
{
	// Iterate from dynamic-key start to dynamic-key end, if the key has both
	// a desctructor and a value then _pthread_tsd_cleanup_key would cause
	// us to re-trigger the destructor.
	Dl_info i;
	pthread_key_t k;

	for (k = __pthread_tsd_start; k < __pthread_tsd_end; k++) {
		void (*destructor)(void *);
		if (_pthread_key_get_destructor(k, &destructor)) {
			void **ptr = &self->tsd[k];
			void *value = *ptr;
			if (value && destructor) {
				_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd",
						"warning: dynamic tsd keys dirty after static key cleanup loop.");

				if (dladdr(destructor, &i) == 0) {
					_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd", i.dli_fname);
					_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd", i.dli_saddr);
				}
			}
		}
	}

}

static void
_pthread_tsd_cleanup_legacy(pthread_t self)
{
	int j;

	// clean up dynamic keys first
	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
		pthread_key_t k;
		for (k = __pthread_tsd_start; k <= self->max_tsd_key; k++) {
			_pthread_tsd_cleanup_key(self, k);
		}
	}

	self->max_tsd_key = 0;

	// clean up static keys
	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
		pthread_key_t k;
		for (k = __pthread_tsd_first; k <= __pthread_tsd_max; k++) {
			_pthread_tsd_cleanup_key(self, k);
		}

		if (__pthread_key_legacy_behaviour_log != 0 && self->max_tsd_key != 0) {
			// max_tsd_key got dirtied, either by static or dynamic keys being
			// reset. check for any dirty dynamic keys.
			_pthread_tsd_behaviour_check(self);
		}
	}
}
#endif // !VARIANT_DYLD

void
_pthread_tsd_cleanup(pthread_t self)
{
#if !VARIANT_DYLD

	// unless __pthread_key_legacy_behaviour == 1, use the new pthread key
	// destructor order: (dynamic -> static) x5 -> (GC x5)

	if (__pthread_key_legacy_behaviour == 0) {
		_pthread_tsd_cleanup_new(self);
	} else {
		_pthread_tsd_cleanup_legacy(self);
	}
#endif // !VARIANT_DYLD
}

#if !VARIANT_DYLD
// XXX: key should be pthread_key_t
int
pthread_key_init_np(int key, void (*destructor)(void *))
{
	int res = EINVAL; // Returns EINVAL if key is out of range.
	if (key >= __pthread_tsd_first && key < __pthread_tsd_start) {
		_PTHREAD_LOCK(tsd_lock);
		_pthread_key_set_destructor(key, destructor);
		if (key > __pthread_tsd_max) {
			__pthread_tsd_max = key;
		}
		_PTHREAD_UNLOCK(tsd_lock);
		res = 0;
	}
	return res;
}
#endif // !VARIANT_DYLD

#undef pthread_self
pthread_t
pthread_self(void)
{
	return _pthread_getspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_SELF);
}
Commit	Line	Data
f1a1da6c A	1	/*
	2	* Copyright (c) 2000-2003, 2007, 2012 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
a0619f9c	5	*
f1a1da6c A	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.
a0619f9c	12	*
f1a1da6c A	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.
a0619f9c	20	*
f1a1da6c A	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23	/*
a0619f9c A	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	*
f1a1da6c A	43	*/
	44	/*
	45	* MkLinux
	46	*/
	47
	48	/*
	49	* POSIX Pthread Library
	50	* Thread Specific Data support
	51	* NB: pthread_getspecific() is in a separate assembly file
	52	*/
	53
	54	#include "internal.h"
	55	#include <TargetConditionals.h>
	56
	57	#if !VARIANT_DYLD
	58	// __pthread_tsd_first is first static key managed by libpthread.
	59	// __pthread_tsd_max is the (observed) end of static key destructors.
	60	// __pthread_tsd_start is the start of dynamic keys.
	61	// __pthread_tsd_end is the end of dynamic keys.
	62
	63	static const int __pthread_tsd_first = __TSD_RESERVED_MAX + 1;
	64	static int __pthread_tsd_max = __pthread_tsd_first;
	65	static const int __pthread_tsd_start = _INTERNAL_POSIX_THREAD_KEYS_MAX;
	66	static const int __pthread_tsd_end = _INTERNAL_POSIX_THREAD_KEYS_END;
	67
964d3577 A	68	static int __pthread_key_legacy_behaviour = 0;
	69	static int __pthread_key_legacy_behaviour_log = 0;
	70
f1a1da6c A	71	// Omit support for pthread key destructors in the static archive for dyld.
	72	// dyld does not create and destroy threads so these are not necessary.
	73	//
	74	// We store the bit-wise negation of the destructor so that a quick non-zero
	75	// test can be used to determine if the destructor has been set, even if it is
	76	// NULL. This means that a destructor of value ~0x0ull cannot be used. That
	77	// shouldn't be a problem in practice since it isn't a valid function address.
	78
	79	static struct {
	80	uintptr_t destructor;
	81	} _pthread_keys[_INTERNAL_POSIX_THREAD_KEYS_END];
	82
2546420a	83	static _pthread_lock tsd_lock = _PTHREAD_LOCK_INITIALIZER;
f1a1da6c	84
964d3577 A	85	// The pthread_tsd destruction order can be reverted to the old (pre-10.11) order
	86	// by setting this environment variable.
	87	void
	88	_pthread_key_global_init(const char *envp[])
	89	{
	90	__pthread_key_legacy_behaviour = _simple_getenv(envp, "PTHREAD_KEY_LEGACY_DESTRUCTOR_ORDER") ? 1 : 0;
	91	__pthread_key_legacy_behaviour_log = _simple_getenv(envp, "PTHREAD_KEY_LEGACY_DESTRUCTOR_ORDER_LOG") ? 1 : 0;
	92	}
	93
f1a1da6c A	94	// Returns true if successful, false if destructor was already set.
	95	static bool
	96	_pthread_key_set_destructor(pthread_key_t key, void (destructor)(void ))
	97	{
	98	uintptr_t *ptr = &_pthread_keys[key].destructor;
	99	uintptr_t value = ~(uintptr_t)destructor;
	100	if (*ptr == 0) {
	101	*ptr = value;
	102	return true;
	103	}
	104	return false;
	105	}
	106
	107	// Returns true if successful, false if the destructor was not set.
	108	static bool
	109	_pthread_key_unset_destructor(pthread_key_t key)
	110	{
	111	uintptr_t *ptr = &_pthread_keys[key].destructor;
	112	if (*ptr != 0) {
	113	*ptr = 0;
	114	return true;
	115	}
	116	return false;
	117	}
	118
	119	// Returns true if successful, false if the destructor was not set.
	120	static bool
	121	_pthread_key_get_destructor(pthread_key_t key, void (*destructor)(void ))
	122	{
	123	uintptr_t value = _pthread_keys[key].destructor;
	124	if (destructor) {
	125	destructor = (void ()(void *))(~value);
	126	}
	127	return (value != 0);
	128	}
	129
	130	int
	131	pthread_key_create(pthread_key_t key, void (destructor)(void *))
	132	{
	133	int res = EAGAIN; // Returns EAGAIN if key cannot be allocated.
	134	pthread_key_t k;
	135
2546420a	136	_PTHREAD_LOCK(tsd_lock);
f1a1da6c A	137	for (k = __pthread_tsd_start; k < __pthread_tsd_end; k++) {
	138	if (_pthread_key_set_destructor(k, destructor)) {
	139	*key = k;
	140	res = 0;
	141	break;
	142	}
	143	}
2546420a	144	_PTHREAD_UNLOCK(tsd_lock);
f1a1da6c A	145
	146	return res;
	147	}
	148
	149	int
	150	pthread_key_delete(pthread_key_t key)
	151	{
	152	int res = EINVAL; // Returns EINVAL if key is not allocated.
	153
2546420a	154	_PTHREAD_LOCK(tsd_lock);
f1a1da6c A	155	if (key >= __pthread_tsd_start && key < __pthread_tsd_end) {
	156	if (_pthread_key_unset_destructor(key)) {
	157	struct _pthread *p;
2546420a	158	_PTHREAD_LOCK(_pthread_list_lock);
f1a1da6c A	159	TAILQ_FOREACH(p, &__pthread_head, plist) {
	160	// No lock for word-sized write.
	161	p->tsd[key] = 0;
	162	}
2546420a	163	_PTHREAD_UNLOCK(_pthread_list_lock);
f1a1da6c A	164	res = 0;
	165	}
	166	}
2546420a	167	_PTHREAD_UNLOCK(tsd_lock);
f1a1da6c A	168
	169	return res;
	170	}
	171	#endif // !VARIANT_DYLD
	172
	173	int
	174	pthread_setspecific(pthread_key_t key, const void *value)
	175	{
	176	int res = EINVAL;
	177
	178	#if !VARIANT_DYLD
	179	if (key >= __pthread_tsd_first && key < __pthread_tsd_end) {
	180	bool created = _pthread_key_get_destructor(key, NULL);
	181	if (key < __pthread_tsd_start \|\| created) {
	182	struct _pthread *self = pthread_self();
	183	self->tsd[key] = (void *)value;
	184	res = 0;
	185
	186	if (key < __pthread_tsd_start) {
	187	// XXX: is this really necessary?
	188	_pthread_key_set_destructor(key, NULL);
	189	}
	190	if (key > self->max_tsd_key) {
	191	self->max_tsd_key = (int)key;
	192	}
	193	}
	194	}
	195	#endif // !VARIANT_DYLD
	196
	197	return res;
	198	}
	199
2546420a A	200	int
	201	_pthread_setspecific_static(pthread_key_t key, void *value)
	202	{
	203	int res = EINVAL;
	204
	205	#if !VARIANT_DYLD
	206	if (key < __pthread_tsd_start) {
	207	_pthread_setspecific_direct(key, value);
	208	res = 0;
	209	}
	210	#endif // !VARIANT_DYLD
	211
	212	return res;
	213	}
	214
f1a1da6c A	215	void*
	216	pthread_getspecific(pthread_key_t key)
	217	{
	218	return _pthread_getspecific_direct(key);
	219	}
	220
	221	#if !VARIANT_DYLD
	222	static void
	223	_pthread_tsd_cleanup_key(pthread_t self, pthread_key_t key)
	224	{
	225	void (destructor)(void );
	226	if (_pthread_key_get_destructor(key, &destructor)) {
	227	void **ptr = &self->tsd[key];
	228	void value = ptr;
	229	if (value) {
	230	*ptr = NULL;
	231	if (destructor) {
	232	destructor(value);
	233	}
	234	}
	235	}
	236	}
	237	#endif // !VARIANT_DYLD
	238
964d3577 A	239	#import <_simple.h>
	240	#import <dlfcn.h>
	241
f1a1da6c	242	#if !VARIANT_DYLD
964d3577 A	243	static void
	244	_pthread_tsd_cleanup_new(pthread_t self)
	245	{
	246	int j;
	247
2546420a	248	// clean up all keys
964d3577 A	249	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
	250	pthread_key_t k;
	251	for (k = __pthread_tsd_start; k <= self->max_tsd_key; k++) {
	252	_pthread_tsd_cleanup_key(self, k);
	253	}
	254
	255	for (k = __pthread_tsd_first; k <= __pthread_tsd_max; k++) {
964d3577 A	256	_pthread_tsd_cleanup_key(self, k);
	257	}
	258	}
	259
	260	self->max_tsd_key = 0;
964d3577 A	261	}
	262
	263	static void
	264	_pthread_tsd_behaviour_check(pthread_t self)
	265	{
	266	// Iterate from dynamic-key start to dynamic-key end, if the key has both
	267	// a desctructor and a value then _pthread_tsd_cleanup_key would cause
	268	// us to re-trigger the destructor.
	269	Dl_info i;
	270	pthread_key_t k;
	271
a0619f9c	272	for (k = __pthread_tsd_start; k < __pthread_tsd_end; k++) {
964d3577 A	273	void (destructor)(void );
	274	if (_pthread_key_get_destructor(k, &destructor)) {
	275	void **ptr = &self->tsd[k];
	276	void value = ptr;
	277	if (value && destructor) {
	278	_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd",
	279	"warning: dynamic tsd keys dirty after static key cleanup loop.");
	280
	281	if (dladdr(destructor, &i) == 0) {
	282	_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd", i.dli_fname);
	283	_simple_asl_log(ASL_LEVEL_ERR, "pthread_tsd", i.dli_saddr);
	284	}
	285	}
	286	}
	287	}
	288
	289	}
	290
	291	static void
	292	_pthread_tsd_cleanup_legacy(pthread_t self)
	293	{
f1a1da6c A	294	int j;
	295
	296	// clean up dynamic keys first
	297	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
	298	pthread_key_t k;
	299	for (k = __pthread_tsd_start; k <= self->max_tsd_key; k++) {
	300	_pthread_tsd_cleanup_key(self, k);
	301	}
	302	}
	303
	304	self->max_tsd_key = 0;
	305
	306	// clean up static keys
	307	for (j = 0; j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) {
	308	pthread_key_t k;
	309	for (k = __pthread_tsd_first; k <= __pthread_tsd_max; k++) {
	310	_pthread_tsd_cleanup_key(self, k);
	311	}
964d3577 A	312
	313	if (__pthread_key_legacy_behaviour_log != 0 && self->max_tsd_key != 0) {
	314	// max_tsd_key got dirtied, either by static or dynamic keys being
	315	// reset. check for any dirty dynamic keys.
	316	_pthread_tsd_behaviour_check(self);
	317	}
	318	}
	319	}
	320	#endif // !VARIANT_DYLD
	321
	322	void
	323	_pthread_tsd_cleanup(pthread_t self)
	324	{
	325	#if !VARIANT_DYLD
	326
	327	// unless __pthread_key_legacy_behaviour == 1, use the new pthread key
	328	// destructor order: (dynamic -> static) x5 -> (GC x5)
	329
	330	if (__pthread_key_legacy_behaviour == 0) {
	331	_pthread_tsd_cleanup_new(self);
	332	} else {
	333	_pthread_tsd_cleanup_legacy(self);
f1a1da6c A	334	}
	335	#endif // !VARIANT_DYLD
	336	}
	337
	338	#if !VARIANT_DYLD
	339	// XXX: key should be pthread_key_t
	340	int
	341	pthread_key_init_np(int key, void (destructor)(void ))
	342	{
	343	int res = EINVAL; // Returns EINVAL if key is out of range.
	344	if (key >= __pthread_tsd_first && key < __pthread_tsd_start) {
2546420a	345	_PTHREAD_LOCK(tsd_lock);
f1a1da6c A	346	_pthread_key_set_destructor(key, destructor);
	347	if (key > __pthread_tsd_max) {
	348	__pthread_tsd_max = key;
	349	}
2546420a	350	_PTHREAD_UNLOCK(tsd_lock);
f1a1da6c A	351	res = 0;
	352	}
	353	return res;
	354	}
	355	#endif // !VARIANT_DYLD
	356
	357	#undef pthread_self
	358	pthread_t
	359	pthread_self(void)
	360	{
	361	return _pthread_getspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_SELF);
	362	}