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* @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@

* 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 Threads - IEEE 1003.1c

#ifndef _POSIX_PTHREAD_INTERNALS_H

#define _POSIX_PTHREAD_INTERNALS_H

#define _PTHREAD_BUILDING_PTHREAD_

// suppress pthread_attr_t typedef in sys/signal.h

#define _PTHREAD_ATTR_T

struct _pthread_attr_t; /* forward reference */

typedefstruct_pthread_attr_tpthread_attr_t;

#include <_simple.h>

#include

#define __OS_EXPOSE_INTERNALS__1

#include

#if TARGET_IPHONE_SIMULATOR

#error Unsupported target

#endif

#define PTHREAD_INTERNAL_CRASH(c, x) do { \

_os_set_crash_log_cause_and_message((c), \

"BUG IN LIBPTHREAD: " x); \

__builtin_trap(); \

} while (0)

#define PTHREAD_CLIENT_CRASH(c, x) do { \

_os_set_crash_log_cause_and_message((c), \

"BUG IN CLIENT OF LIBPTHREAD: " x); \

__builtin_trap(); \

} while (0)

#ifndef __POSIX_LIB__

#define __POSIX_LIB__

#endif

#ifndef PTHREAD_LAYOUT_SPI

#define PTHREAD_LAYOUT_SPI1

#endif

#include "posix_sched.h"

#include "tsd_private.h"

#include "spinlock_private.h"

#define PTHREAD_EXPORT extern __attribute__((visibility("default")))

#define PTHREAD_EXTERN extern

#define PTHREAD_NOEXPORT __attribute__((visibility("hidden")))

#define PTHREAD_NOEXPORT_VARIANT

#define PTHREAD_NORETURN __attribute__((__noreturn__))

#define PTHREAD_ALWAYS_INLINE __attribute__((always_inline))

#define PTHREAD_NOINLINE __attribute__((noinline))

#define PTHREAD_WEAK __attribute__((weak))

#define PTHREAD_USED __attribute__((used))

#define PTHREAD_NOT_TAIL_CALLED __attribute__((__not_tail_called__))

#define OS_UNFAIR_LOCK_INLINE1

#include

typedefos_unfair_lock _pthread_lock;

#define _PTHREAD_LOCK_INITIALIZER OS_UNFAIR_LOCK_INIT

#define _PTHREAD_LOCK_INIT(lock) ((lock) = (_pthread_lock)_PTHREAD_LOCK_INITIALIZER)

#define _PTHREAD_LOCK(lock) os_unfair_lock_lock_with_options_inline(&(lock), OS_UNFAIR_LOCK_DATA_SYNCHRONIZATION)

#define _PTHREAD_LOCK_FROM_MACH_THREAD(lock) os_unfair_lock_lock_inline_no_tsd_4libpthread(&(lock))

#define _PTHREAD_UNLOCK(lock) os_unfair_lock_unlock_inline(&(lock))

#define _PTHREAD_UNLOCK_FROM_MACH_THREAD(lock) os_unfair_lock_unlock_inline_no_tsd_4libpthread(&(lock))

#define _PTHREAD_POLICY_IS_FIXEDPRI(x) ((x) == SCHED_RR || (x) == SCHED_FIFO)

externint__is_threaded;

externint__unix_conforming;

// List of all pthreads in the process.

TAILQ_HEAD(__pthread_list, _pthread);

PTHREAD_NOEXPORTexternstruct__pthread_list__pthread_head;

// Lock protects access to above list.

PTHREAD_NOEXPORTextern_pthread_lock_pthread_list_lock;

PTHREAD_NOEXPORT extern uint32_t _main_qos;

#if PTHREAD_DEBUG_LOG

#include

PTHREAD_NOEXPORTexternint_pthread_debuglog;

PTHREAD_NOEXPORTexternuint64_t _pthread_debugstart;

#endif

* Compiled-in limits

#if TARGET_OS_EMBEDDED

#define _EXTERNAL_POSIX_THREAD_KEYS_MAX256

#define _INTERNAL_POSIX_THREAD_KEYS_MAX256

#define _INTERNAL_POSIX_THREAD_KEYS_END512

#else

#define _EXTERNAL_POSIX_THREAD_KEYS_MAX512

#define _INTERNAL_POSIX_THREAD_KEYS_MAX256

#define _INTERNAL_POSIX_THREAD_KEYS_END768

#endif

#define PTHREAD_T_OFFSET0

#define MAXTHREADNAMESIZE 64

#define _PTHREAD_T

typedef struct _pthread {

// ABI - These fields are externally known as struct _opaque_pthread_t.

long sig; // _PTHREAD_SIG

struct__darwin_pthread_handler_rec *__cleanup_stack;

// SPI - These fields are private.

// Fields protected by _pthread_list_lock

TAILQ_ENTRY(_pthread) tl_plist; // global thread list [aligned]

structpthread_join_context_s *tl_join_ctx;

void*tl_exit_value;

uint32_ttl_policy:8,

tl_joinable:1,

tl_joiner_cleans_up:1,

tl_has_custom_stack:1,

__tl_pad:21;

// MACH_PORT_NULL if no joiner

// tsd[_PTHREAD_TSD_SLOT_MACH_THREAD_SELF] when has a joiner

// MACH_PORT_DEAD if the thread exited

uint32_ttl_exit_gate;

structsched_paramtl_param;

// Fields protected by pthread_t::lock

_pthread_lock lock;

uint16_tmax_tsd_key;

uint16_tinherit:8,

kernalloc:1,

schedset:1,

wqthread:1,

wqkillset:1,

wqoutsideqos:1,

__flags_pad:3;

char pthread_name[MAXTHREADNAMESIZE]; // includes NUL [aligned]

void *(*fun)(void*); // thread start routine

void*wq_kqid_ptr; // wqthreads (workloop)

void*arg; // thread start routine argument

int wq_nevents; // wqthreads (workloop / kevent)

uint16_twq_retop; // wqthreads

uint8_tcancel_state; // whether the thread can be canceled [atomic]

uint8_tcanceled; // 4597450 set if conformant cancelation happened

errno_t cancel_error;

errno_t err_no; // thread-local errno

void*stackaddr; // base of the stack (page aligned)

void*stackbottom; // stackaddr - stacksize

void*freeaddr; // stack/thread allocation base address

size_tfreesize; // stack/thread allocation size

size_tguardsize; // guard page size in bytes

// tsd-base relative accessed elements

__attribute__((aligned(8)))

uint64_tthread_id; // 64-bit unique thread id

/* Thread Specific Data slots

* The offset of this field from the start of the structure is difficult to

* change on OS X because of a thorny bitcompat issue: mono has hard coded

* the value into their source. Newer versions of mono will fall back to

* scanning to determine it at runtime, but there's lots of software built

* with older mono that won't. We will have to break them someday...

__attribute__((aligned (16)))

void *tsd[_EXTERNAL_POSIX_THREAD_KEYS_MAX + _INTERNAL_POSIX_THREAD_KEYS_MAX];

} *pthread_t;

#define _PTHREAD_ATTR_REFILLMS_MAX ((2<<24) -1)

struct_pthread_attr_t {

long sig;

size_t guardsize; // size in bytes of stack overflow guard area

void *stackaddr;// stack base; vm_page_size aligned

size_t stacksize; // stack size; multiple of vm_page_size and >= PTHREAD_STACK_MIN

union {

struct sched_param param; // [aligned]

unsigned long qosclass; // pthread_priority_t

};

uint32_t

detached:8,

inherit:8,

policy:8,

schedset:1,

qosset:1,

policyset:1,

cpupercentset:1,

defaultguardpage:1,

unused:3;

uint32_t

cpupercent:8,

refillms:24;

#if defined(__LP64__)

uint32_t_reserved[4];

#else

uint32_t _reserved[2];

#endif

};

* Mutex attributes

#define _PTHREAD_MUTEXATTR_T

typedef struct {

longsig;

intprioceiling;

uint32_tprotocol:2,

type:2,

pshared:2,

opt:3,

unused:23;

} pthread_mutexattr_t;

struct_pthread_mutex_options {

uint32_tprotocol:2,

type:2,

pshared:2,

policy:3,

hold:2,

misalign:1,

notify:1,

mutex:1,

unused:2,

lock_count:16;

};

#define _PTHREAD_MUTEX_POLICY_LAST (PTHREAD_MUTEX_POLICY_FIRSTFIT_NP +1)

#define _PTHREAD_MTX_OPT_POLICY_FAIRSHARE1

#define _PTHREAD_MTX_OPT_POLICY_FIRSTFIT2

#define _PTHREAD_MTX_OPT_POLICY_DEFAULT _PTHREAD_MTX_OPT_POLICY_FIRSTFIT

// The following _pthread_mutex_options defintions exist in synch_internal.h

// such that the kernel extension can test for flags. They must be kept in

// sync with the bit values in the struct above.

// _PTHREAD_MTX_OPT_PSHARED 0x010

// _PTHREAD_MTX_OPT_NOTIFY 0x1000

// _PTHREAD_MTX_OPT_MUTEX 0x2000

// The fixed mask is used to mask out portions of the mutex options that

// change on a regular basis (notify, lock_count).

#define _PTHREAD_MTX_OPT_FIXED_MASK 0x27ff

typedef struct {

longsig;

_pthread_lock lock;

union {

uint32_tvalue;

struct _pthread_mutex_options options;

} mtxopts;

int16_tprioceiling;

int16_tpriority;

#if defined(__LP64__)

uint32_t _pad;

#endif

uint32_t m_tid[2]; // thread id of thread that has mutex locked

uint32_t m_seq[2]; // mutex sequence id

uint32_t m_mis[2]; // for misaligned locks m_tid/m_seq will span into here

#if defined(__LP64__)

uint32_t_reserved[4];

#else

uint32_t _reserved[1];

#endif

} _pthread_mutex;

#define _PTHREAD_CONDATTR_T

typedef struct {

longsig;

uint32_tpshared:2,

unsupported:30;

} pthread_condattr_t;

typedef struct {

longsig;

_pthread_lock lock;

uint32_tunused:29,

misalign:1,

pshared:2;

_pthread_mutex *busy;

uint32_tc_seq[3];

#if defined(__LP64__)

uint32_t_reserved[3];

#endif

} _pthread_cond;

#define _PTHREAD_ONCE_T

typedef struct {

longsig;

os_once_t once;

} pthread_once_t;

#define _PTHREAD_RWLOCKATTR_T

typedef struct {

longsig;

intpshared;

#if defined(__LP64__)

uint32_t_reserved[3];

#else

uint32_t _reserved[2];

#endif

} pthread_rwlockattr_t;

typedef struct {

longsig;

_pthread_lock lock;

uint32_tunused:29,

misalign:1,

pshared:2;

uint32_trw_flags;

#if defined(__LP64__)

uint32_t _pad;

#endif

uint32_t rw_tid[2]; // thread id of thread that has exclusive (write) lock

uint32_t rw_seq[4]; // rw sequence id (at 128-bit aligned boundary)

uint32_t rw_mis[4]; // for misaligned locks rw_seq will span into here

#if defined(__LP64__)

uint32_t_reserved[34];

#else

uint32_t _reserved[18];

#endif

} _pthread_rwlock;

#include "pthread.h"

#include "pthread_spis.h"

_Static_assert(sizeof(_pthread_mutex) ==sizeof(pthread_mutex_t),

"Incorrect _pthread_mutex structure size");

_Static_assert(sizeof(_pthread_rwlock) ==sizeof(pthread_rwlock_t),

"Incorrect _pthread_rwlock structure size");

// Internal references to pthread_self() use TSD slot 0 directly.

inline static pthread_t __attribute__((__pure__))

_pthread_self_direct(void)

{

return_pthread_getspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_SELF);

}

#define pthread_self() _pthread_self_direct()

PTHREAD_ALWAYS_INLINE

inline static uint64_t __attribute__((__pure__))

_pthread_selfid_direct(void)

{

return (_pthread_self_direct())->thread_id;

}

#define _PTHREAD_DEFAULT_INHERITSCHED PTHREAD_INHERIT_SCHED

#define _PTHREAD_DEFAULT_PROTOCOL PTHREAD_PRIO_NONE

#define _PTHREAD_DEFAULT_PRIOCEILING 0

#define _PTHREAD_DEFAULT_POLICY SCHED_OTHER

#define _PTHREAD_DEFAULT_STACKSIZE 0x80000 /* 512K */

#define _PTHREAD_DEFAULT_PSHARED PTHREAD_PROCESS_PRIVATE

#define _PTHREAD_NO_SIG 0x00000000

#define _PTHREAD_MUTEX_ATTR_SIG 0x4D545841 /* 'MTXA' */

#define _PTHREAD_MUTEX_SIG 0x4D555458 /* 'MUTX' */

#define _PTHREAD_MUTEX_SIG_fast 0x4D55545A /* 'MUTZ' */

#define _PTHREAD_MUTEX_SIG_MASK 0xfffffffd

#define _PTHREAD_MUTEX_SIG_CMP 0x4D555458 /* _PTHREAD_MUTEX_SIG & _PTHREAD_MUTEX_SIG_MASK */

#define _PTHREAD_MUTEX_SIG_init 0x32AAABA7 /* [almost] ~'MUTX' */

#define _PTHREAD_ERRORCHECK_MUTEX_SIG_init 0x32AAABA1

#define _PTHREAD_RECURSIVE_MUTEX_SIG_init 0x32AAABA2

#define _PTHREAD_FIRSTFIT_MUTEX_SIG_init 0x32AAABA3

#define _PTHREAD_MUTEX_SIG_init_MASK 0xfffffff0

#define _PTHREAD_MUTEX_SIG_init_CMP 0x32AAABA0

#define _PTHREAD_COND_ATTR_SIG 0x434E4441 /* 'CNDA' */

#define _PTHREAD_COND_SIG 0x434F4E44 /* 'COND' */

#define _PTHREAD_COND_SIG_init 0x3CB0B1BB /* [almost] ~'COND' */

#define _PTHREAD_ATTR_SIG 0x54484441 /* 'THDA' */

#define _PTHREAD_ONCE_SIG 0x4F4E4345 /* 'ONCE' */

#define _PTHREAD_ONCE_SIG_init 0x30B1BCBA /* [almost] ~'ONCE' */

#define _PTHREAD_SIG 0x54485244 /* 'THRD' */

#define _PTHREAD_RWLOCK_ATTR_SIG 0x52574C41 /* 'RWLA' */

#define _PTHREAD_RWLOCK_SIG 0x52574C4B /* 'RWLK' */

#define _PTHREAD_RWLOCK_SIG_init 0x2DA8B3B4 /* [almost] ~'RWLK' */

#define _PTHREAD_KERN_COND_SIG 0x12345678 /* */

#define _PTHREAD_KERN_MUTEX_SIG 0x34567812 /* */

#define _PTHREAD_KERN_RWLOCK_SIG 0x56781234 /* */

#if defined(DEBUG)

#define _PTHREAD_MUTEX_OWNER_SELF pthread_self()

#else

#define _PTHREAD_MUTEX_OWNER_SELF (pthread_t)0x12141968

#endif

#define _PTHREAD_MUTEX_OWNER_SWITCHING (pthread_t)(~0)

#define _PTHREAD_CANCEL_STATE_MASK 0x01

#define _PTHREAD_CANCEL_TYPE_MASK 0x02

#define _PTHREAD_CANCEL_PENDING 0x10 /* pthread_cancel() has been called for this thread */

#define _PTHREAD_CANCEL_INITIALIZED 0x20 /* the thread in the list is properly initialized */

externboolean_t swtch_pri(int);

#include "kern/kern_internal.h"

/* Prototypes. */

/* Internal globals. */

PTHREAD_NOEXPORTvoid_pthread_tsd_cleanup(pthread_tself);

PTHREAD_NOEXPORTint_pthread_mutex_droplock(_pthread_mutex*mutex,uint32_t* flagp,uint32_t** pmtxp,uint32_t* mgenp,uint32_t* ugenp);

/* internally redirected upcalls. */

PTHREAD_NOEXPORT void* malloc(size_t);

PTHREAD_NOEXPORT void free(void*);

/* syscall interfaces */

externuint32_t__psynch_mutexwait(_pthread_mutex* mutex, uint32_tmgen,uint32_t ugen,uint64_ttid,uint32_tflags);

externuint32_t__psynch_mutexdrop(_pthread_mutex* mutex, uint32_tmgen,uint32_t ugen,uint64_ttid,uint32_tflags);

externuint32_t__psynch_cvbroad(pthread_cond_t * cv,uint64_tcvlsgen,uint64_tcvudgen,uint32_tflags, pthread_mutex_t * mutex, uint64_tmugen,uint64_ttid);

externuint32_t__psynch_cvsignal(pthread_cond_t * cv,uint64_tcvlsgen,uint32_tcvugen,intthread_port, pthread_mutex_t * mutex, uint64_tmugen,uint64_ttid,uint32_tflags);

externuint32_t__psynch_cvwait(pthread_cond_t * cv,uint64_tcvlsgen,uint32_tcvugen, pthread_mutex_t * mutex, uint64_tmugen,uint32_tflags,int64_tsec,uint32_tnsec);

externuint32_t__psynch_cvclrprepost(void* cv,uint32_tcvgen,uint32_tcvugen,uint32_tcvsgen,uint32_tprepocnt,uint32_tpreposeq,uint32_tflags);

externuint32_t__psynch_rw_longrdlock(pthread_rwlock_t * rwlock,uint32_tlgenval,uint32_tugenval,uint32_trw_wc,intflags);

externuint32_t__psynch_rw_yieldwrlock(pthread_rwlock_t * rwlock,uint32_tlgenval,uint32_tugenval,uint32_trw_wc,intflags);

externint__psynch_rw_downgrade(pthread_rwlock_t * rwlock,uint32_tlgenval,uint32_tugenval,uint32_trw_wc,intflags);

externuint32_t__psynch_rw_upgrade(pthread_rwlock_t * rwlock,uint32_tlgenval,uint32_tugenval,uint32_trw_wc,intflags);

externuint32_t__psynch_rw_rdlock(pthread_rwlock_t * rwlock,uint32_tlgenval,uint32_tugenval,uint32_trw_wc,intflags);

externuint32_t__psynch_rw_wrlock(pthread_rwlock_t * rwlock,uint32_tlgenval,uint32_tugenval,uint32_trw_wc,intflags);

externuint32_t__psynch_rw_unlock(pthread_rwlock_t * rwlock,uint32_tlgenval,uint32_tugenval,uint32_trw_wc,intflags);

externuint32_t__psynch_rw_unlock2(pthread_rwlock_t * rwlock,uint32_tlgenval,uint32_tugenval,uint32_trw_wc,intflags);

externuint32_t__bsdthread_ctl(uintptr_tcmd,uintptr_targ1,uintptr_targ2,uintptr_targ3);

PTHREAD_EXTERN

int

__proc_info(intcallnum,intpid,intflavor,uint64_targ,void* buffer,intbuffersize);

PTHREAD_NOEXPORT

void

_pthread_deallocate(pthread_tt,boolfrom_mach_thread);

PTHREAD_NORETURN PTHREAD_NOEXPORT

void

__pthread_abort(void);

PTHREAD_NORETURN PTHREAD_NOEXPORT

void

__pthread_abort_reason(constchar*fmt, ...) __printflike(1,2);

PTHREAD_NOEXPORT

thread_qos_t

_pthread_qos_class_to_thread_qos(qos_class_t qos);

PTHREAD_NOEXPORT

void

_pthread_set_main_qos(pthread_priority_t qos);

PTHREAD_NOEXPORT

void

_pthread_key_global_init(constchar*envp[]);

PTHREAD_NOEXPORT

void

_pthread_mutex_global_init(constchar*envp[],struct_pthread_registration_data*registration_data);

PTHREAD_EXPORT

void

_pthread_start(pthread_tself, mach_port_t kport,void*(*fun)(void*),void* funarg,size_tstacksize,unsignedintflags);

PTHREAD_NORETURN PTHREAD_EXPORT

void

_pthread_wqthread(pthread_tself, mach_port_t kport,void*stackaddr,void*keventlist,intflags,intnkevents);

PTHREAD_NOEXPORT

void

_pthread_main_thread_init(pthread_tp);

PTHREAD_NOEXPORT

void

_pthread_bsdthread_init(struct_pthread_registration_data*data);

PTHREAD_NOEXPORT_VARIANT

void

_pthread_clear_qos_tsd(mach_port_t thread_port);

#define PTHREAD_CONFORM_DARWIN_LEGACY 0

#define PTHREAD_CONFORM_UNIX03_NOCANCEL 1

#define PTHREAD_CONFORM_UNIX03_CANCELABLE2

PTHREAD_NOEXPORT_VARIANT

void

_pthread_testcancel(intconforming);

PTHREAD_EXPORT

void

_pthread_exit_if_canceled(interror);

PTHREAD_NOEXPORT

void

_pthread_markcancel_if_canceled(pthread_tthread, mach_port_t kport);

PTHREAD_NOEXPORT

void

_pthread_setcancelstate_exit(pthread_tself,void*value_ptr);

PTHREAD_NOEXPORT

semaphore_t

_pthread_joiner_prepost_wake(pthread_t thread);

PTHREAD_ALWAYS_INLINE

staticinlinemach_port_t

_pthread_kernel_thread(pthread_t t)

{

return t->tsd[_PTHREAD_TSD_SLOT_MACH_THREAD_SELF];

}

PTHREAD_ALWAYS_INLINE

static inline void

_pthread_set_kernel_thread(pthread_tt, mach_port_t p)

{

t->tsd[_PTHREAD_TSD_SLOT_MACH_THREAD_SELF] = p;

}

#define PTHREAD_ABORT(f,...) __pthread_abort_reason( \

"%s:%s:%u: "f, __FILE__, __func__, __LINE__, ## __VA_ARGS__)

#define PTHREAD_ASSERT(b) \

do { if (!(b)) PTHREAD_ABORT("failed assertion `%s'", #b); } while (0)

#include

structpthread_atfork_entry {

void(*prepare)(void);

void(*parent)(void);

void(*child)(void);

};

#define PTHREAD_ATFORK_INLINE_MAX10

#define PTHREAD_ATFORK_MAX (vm_page_size/sizeof(struct pthread_atfork_entry))

structpthread_globals_s {

// atfork.c

pthread_tpsaved_self;

_pthread_lockpsaved_self_global_lock;

_pthread_lockpthread_atfork_lock;

size_tatfork_count;

struct pthread_atfork_entry atfork_storage[PTHREAD_ATFORK_INLINE_MAX];

struct pthread_atfork_entry *atfork;

uint16_t qmp_logical[THREAD_QOS_LAST];

uint16_t qmp_physical[THREAD_QOS_LAST];

};

typedefstructpthread_globals_s*pthread_globals_t;

__attribute__((__pure__))

static inline pthread_globals_t

_pthread_globals(void)

{

returnos_alloc_once(OS_ALLOC_ONCE_KEY_LIBSYSTEM_PTHREAD,

sizeof(structpthread_globals_s),

NULL);

}

#pragma mark _pthread_mutex_check_signature

PTHREAD_ALWAYS_INLINE

static inline bool

_pthread_mutex_check_signature_fast(_pthread_mutex *mutex)

{

return (mutex->sig == _PTHREAD_MUTEX_SIG_fast);

}

PTHREAD_ALWAYS_INLINE

static inline bool

_pthread_mutex_check_signature(_pthread_mutex *mutex)

{

return ((mutex->sig & _PTHREAD_MUTEX_SIG_MASK) == _PTHREAD_MUTEX_SIG_CMP);

}

PTHREAD_ALWAYS_INLINE

static inline bool

_pthread_mutex_check_signature_init(_pthread_mutex *mutex)

{

return ((mutex->sig & _PTHREAD_MUTEX_SIG_init_MASK) ==

_PTHREAD_MUTEX_SIG_init_CMP);

}

#pragma mark _pthread_rwlock_check_signature

PTHREAD_ALWAYS_INLINE

static inline bool

_pthread_rwlock_check_signature(_pthread_rwlock *rwlock)

{

return (rwlock->sig == _PTHREAD_RWLOCK_SIG);

}

PTHREAD_ALWAYS_INLINE

static inline bool

_pthread_rwlock_check_signature_init(_pthread_rwlock *rwlock)

{

return (rwlock->sig == _PTHREAD_RWLOCK_SIG_init);

}

* ALWAYS called without list lock and return with list lock held on success

* This weird calling convention exists because this function will sometimes

* drop the lock, and it's best callers don't have to remember this.

PTHREAD_ALWAYS_INLINE

static inline bool

_pthread_validate_thread_and_list_lock(pthread_t thread)

{

pthread_t p;

if(thread ==NULL)returnfalse;

loop:

_PTHREAD_LOCK(_pthread_list_lock);

TAILQ_FOREACH(p, &__pthread_head, tl_plist) {

if(p != thread)continue;

intstate = os_atomic_load(&p->cancel_state, relaxed);

if (os_likely(state & _PTHREAD_CANCEL_INITIALIZED)) {

if(os_unlikely(p->sig !=_PTHREAD_SIG)) {

PTHREAD_CLIENT_CRASH(0, "pthread_t was corrupted");

}

return true;

}

_PTHREAD_UNLOCK(_pthread_list_lock);

thread_switch(_pthread_kernel_thread(p),

SWITCH_OPTION_OSLOCK_DEPRESS,1);

gotoloop;

}

_PTHREAD_UNLOCK(_pthread_list_lock);

return false;

}

PTHREAD_ALWAYS_INLINE

static inline bool

_pthread_is_valid(pthread_t thread, mach_port_t *portp)

{

mach_port_t kport = MACH_PORT_NULL;

boolvalid;

if(thread ==pthread_self()) {

valid =true;

kport = _pthread_kernel_thread(thread);

}elseif(!_pthread_validate_thread_and_list_lock(thread)) {

valid =false;

}else{

kport = _pthread_kernel_thread(thread);

valid =true;

_PTHREAD_UNLOCK(_pthread_list_lock);

}

if(portp !=NULL) {

*portp = kport;

}

returnvalid;

}

PTHREAD_ALWAYS_INLINE

static inline void*

_pthread_atomic_xchg_ptr_inline(void**p,void*v)

{

returnos_atomic_xchg(p, v, seq_cst);

}

PTHREAD_ALWAYS_INLINE

static inline uint32_t

_pthread_atomic_xchg_uint32_relaxed_inline(uint32_t*p,uint32_tv)

{

returnos_atomic_xchg(p, v, relaxed);

}

#define _pthread_atomic_xchg_ptr(p, v) \

_pthread_atomic_xchg_ptr_inline(p, v)

#define _pthread_atomic_xchg_uint32_relaxed(p, v) \

_pthread_atomic_xchg_uint32_relaxed_inline(p, v)

#endif /* _POSIX_PTHREAD_INTERNALS_H */

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