mirror/glibc
2
0
Fork 0
mirror of git://sourceware.org/git/glibc.git synced 2024-12-15 04:20:28 +08:00
Code Issues Packages Projects Releases Wiki Activity
d7a68734f7
glibc/nptl/pthreadP.h

671 lines
24 KiB
C
Raw Blame History

/* Copyright (C) 2002-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _PTHREADP_H
#define _PTHREADP_H 1
#include <pthread.h>
#include <setjmp.h>
#include <stdbool.h>
#include <sys/syscall.h>
#include "descr.h"
#include <tls.h>
#include <lowlevellock.h>
#include <stackinfo.h>
#include <internaltypes.h>
#include <pthread-functions.h>
#include <atomic.h>
#include <kernel-features.h>
#include <errno.h>
/* Atomic operations on TLS memory. */
#ifndef THREAD_ATOMIC_CMPXCHG_VAL
# define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, new, old) \
atomic_compare_and_exchange_val_acq (&(descr)->member, new, old)
#endif
#ifndef THREAD_ATOMIC_BIT_SET
# define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
atomic_bit_set (&(descr)->member, bit)
#endif
/* Adaptive mutex definitions. */
#ifndef MAX_ADAPTIVE_COUNT
# define MAX_ADAPTIVE_COUNT 100
#endif
/* Magic cookie representing robust mutex with dead owner. */
#define PTHREAD_MUTEX_INCONSISTENT INT_MAX
/* Magic cookie representing not recoverable robust mutex. */
#define PTHREAD_MUTEX_NOTRECOVERABLE (INT_MAX - 1)
/* Internal mutex type value. */
enum
{
PTHREAD_MUTEX_KIND_MASK_NP = 3,
PTHREAD_MUTEX_ELISION_NP = 256,
PTHREAD_MUTEX_NO_ELISION_NP = 512,
PTHREAD_MUTEX_ROBUST_NORMAL_NP = 16,
PTHREAD_MUTEX_ROBUST_RECURSIVE_NP
= PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_RECURSIVE_NP,
PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP
= PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP
= PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
PTHREAD_MUTEX_PRIO_INHERIT_NP = 32,
PTHREAD_MUTEX_PI_NORMAL_NP
= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_NORMAL,
PTHREAD_MUTEX_PI_RECURSIVE_NP
= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
PTHREAD_MUTEX_PI_ERRORCHECK_NP
= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
PTHREAD_MUTEX_PI_ADAPTIVE_NP
= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP
= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_NORMAL_NP,
PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP
= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_RECURSIVE_NP,
PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP
= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP,
PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP
= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP,
PTHREAD_MUTEX_PRIO_PROTECT_NP = 64,
PTHREAD_MUTEX_PP_NORMAL_NP
= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_NORMAL,
PTHREAD_MUTEX_PP_RECURSIVE_NP
= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
PTHREAD_MUTEX_PP_ERRORCHECK_NP
= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
PTHREAD_MUTEX_PP_ADAPTIVE_NP
= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
PTHREAD_MUTEX_ELISION_FLAGS_NP
= PTHREAD_MUTEX_ELISION_NP | PTHREAD_MUTEX_NO_ELISION_NP,
PTHREAD_MUTEX_TIMED_ELISION_NP =
PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_ELISION_NP,
PTHREAD_MUTEX_TIMED_NO_ELISION_NP =
PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_NO_ELISION_NP,
};
#define PTHREAD_MUTEX_PSHARED_BIT 128
#define PTHREAD_MUTEX_TYPE(m) \
((m)->__data.__kind & 127)
/* Don't include NO_ELISION, as that type is always the same
as the underlying lock type. */
#define PTHREAD_MUTEX_TYPE_ELISION(m) \
((m)->__data.__kind & (127|PTHREAD_MUTEX_ELISION_NP))
#if LLL_PRIVATE == 0 && LLL_SHARED == 128
# define PTHREAD_MUTEX_PSHARED(m) \
((m)->__data.__kind & 128)
#else
# define PTHREAD_MUTEX_PSHARED(m) \
(((m)->__data.__kind & 128) ? LLL_SHARED : LLL_PRIVATE)
#endif
/* The kernel when waking robust mutexes on exit never uses
FUTEX_PRIVATE_FLAG FUTEX_WAKE. */
#define PTHREAD_ROBUST_MUTEX_PSHARED(m) LLL_SHARED
/* Ceiling in __data.__lock. __data.__lock is signed, so don't
use the MSB bit in there, but in the mask also include that bit,
so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK
masking if the value is then shifted down by
PTHREAD_MUTEX_PRIO_CEILING_SHIFT. */
#define PTHREAD_MUTEX_PRIO_CEILING_SHIFT 19
#define PTHREAD_MUTEX_PRIO_CEILING_MASK 0xfff80000
/* Flags in mutex attr. */
#define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT 28
#define PTHREAD_MUTEXATTR_PROTOCOL_MASK 0x30000000
#define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT 12
#define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK 0x00fff000
#define PTHREAD_MUTEXATTR_FLAG_ROBUST 0x40000000
#define PTHREAD_MUTEXATTR_FLAG_PSHARED 0x80000000
#define PTHREAD_MUTEXATTR_FLAG_BITS \
(PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED \
| PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
/* Check whether rwlock prefers readers. */
#define PTHREAD_RWLOCK_PREFER_READER_P(rwlock) \
((rwlock)->__data.__flags == 0)
/* Bits used in robust mutex implementation. */
#define FUTEX_WAITERS 0x80000000
#define FUTEX_OWNER_DIED 0x40000000
#define FUTEX_TID_MASK 0x3fffffff
/* Internal variables. */
/* Default pthread attributes. */
extern struct pthread_attr __default_pthread_attr attribute_hidden;
extern int __default_pthread_attr_lock attribute_hidden;
/* Size and alignment of static TLS block. */
extern size_t __static_tls_size attribute_hidden;
extern size_t __static_tls_align_m1 attribute_hidden;
/* Flag whether the machine is SMP or not. */
extern int __is_smp attribute_hidden;
/* Thread descriptor handling. */
extern list_t __stack_user;
hidden_proto (__stack_user)
/* Attribute handling. */
extern struct pthread_attr *__attr_list attribute_hidden;
extern int __attr_list_lock attribute_hidden;
/* First available RT signal. */
extern int __current_sigrtmin attribute_hidden;
/* Last available RT signal. */
extern int __current_sigrtmax attribute_hidden;
/* Concurrency handling. */
extern int __concurrency_level attribute_hidden;
/* Thread-local data key handling. */
extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];
hidden_proto (__pthread_keys)
/* Number of threads running. */
extern unsigned int __nptl_nthreads attribute_hidden;
#ifndef __ASSUME_SET_ROBUST_LIST
/* Negative if we do not have the system call and we can use it. */
extern int __set_robust_list_avail attribute_hidden;
#endif
/* Thread Priority Protection. */
extern int __sched_fifo_min_prio attribute_hidden;
extern int __sched_fifo_max_prio attribute_hidden;
extern void __init_sched_fifo_prio (void) attribute_hidden;
extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)
attribute_hidden;
extern int __pthread_current_priority (void) attribute_hidden;
/* The library can run in debugging mode where it performs a lot more
tests. */
extern int __pthread_debug attribute_hidden;
/** For now disable debugging support. */
#if 0
# define DEBUGGING_P __builtin_expect (__pthread_debug, 0)
# define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
# define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)
#else
# define DEBUGGING_P 0
/* Simplified test. This will not catch all invalid descriptors but
is better than nothing. And if the test triggers the thread
descriptor is guaranteed to be invalid. */
# define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)
# define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)
#endif
/* Cancellation test. */
#define CANCELLATION_P(self) \
do { \
int cancelhandling = THREAD_GETMEM (self, cancelhandling); \
if (CANCEL_ENABLED_AND_CANCELED (cancelhandling)) \
{ \
THREAD_SETMEM (self, result, PTHREAD_CANCELED); \
__do_cancel (); \
} \
} while (0)
extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)
__cleanup_fct_attribute __attribute ((__noreturn__))
#if !defined SHARED && !defined IS_IN_libpthread
weak_function
#endif
;
extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
__cleanup_fct_attribute __attribute ((__noreturn__))
#ifndef SHARED
weak_function
#endif
;
extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
__cleanup_fct_attribute;
extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
__cleanup_fct_attribute;
#if defined NOT_IN_libc && defined IS_IN_libpthread
hidden_proto (__pthread_unwind)
hidden_proto (__pthread_unwind_next)
hidden_proto (__pthread_register_cancel)
hidden_proto (__pthread_unregister_cancel)
# ifdef SHARED
extern void attribute_hidden pthread_cancel_init (void);
extern void __unwind_freeres (void);
# endif
#endif
/* Called when a thread reacts on a cancellation request. */
static inline void
__attribute ((noreturn, always_inline))
__do_cancel (void)
{
struct pthread *self = THREAD_SELF;
/* Make sure we get no more cancellations. */
THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT);
__pthread_unwind ((__pthread_unwind_buf_t *)
THREAD_GETMEM (self, cleanup_jmp_buf));
}
/* Set cancellation mode to asynchronous. */
#define CANCEL_ASYNC() \
__pthread_enable_asynccancel ()
/* Reset to previous cancellation mode. */
#define CANCEL_RESET(oldtype) \
__pthread_disable_asynccancel (oldtype)
#if !defined NOT_IN_libc
/* Same as CANCEL_ASYNC, but for use in libc.so. */
# define LIBC_CANCEL_ASYNC() \
__libc_enable_asynccancel ()
/* Same as CANCEL_RESET, but for use in libc.so. */
# define LIBC_CANCEL_RESET(oldtype) \
__libc_disable_asynccancel (oldtype)
# define LIBC_CANCEL_HANDLED() \
__asm (".globl " __SYMBOL_PREFIX "__libc_enable_asynccancel"); \
__asm (".globl " __SYMBOL_PREFIX "__libc_disable_asynccancel")
#elif defined NOT_IN_libc && defined IS_IN_libpthread
# define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()
# define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)
# define LIBC_CANCEL_HANDLED() \
__asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \
__asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")
#elif defined NOT_IN_libc && defined IS_IN_librt
# define LIBC_CANCEL_ASYNC() \
__librt_enable_asynccancel ()
# define LIBC_CANCEL_RESET(val) \
__librt_disable_asynccancel (val)
# define LIBC_CANCEL_HANDLED() \
__asm (".globl " __SYMBOL_PREFIX "__librt_enable_asynccancel"); \
__asm (".globl " __SYMBOL_PREFIX "__librt_disable_asynccancel")
#else
# define LIBC_CANCEL_ASYNC() 0 /* Just a dummy value. */
# define LIBC_CANCEL_RESET(val) ((void)(val)) /* Nothing, but evaluate it. */
# define LIBC_CANCEL_HANDLED() /* Nothing. */
#endif
/* The signal used for asynchronous cancelation. */
#define SIGCANCEL __SIGRTMIN
/* Signal needed for the kernel-supported POSIX timer implementation.
We can reuse the cancellation signal since we can distinguish
cancellation from timer expirations. */
#define SIGTIMER SIGCANCEL
/* Signal used to implement the setuid et.al. functions. */
#define SIGSETXID (__SIGRTMIN + 1)
/* Used to communicate with signal handler. */
extern struct xid_command *__xidcmd attribute_hidden;
/* Internal prototypes. */
/* Thread list handling. */
extern struct pthread *__find_in_stack_list (struct pthread *pd)
attribute_hidden internal_function;
/* Deallocate a thread's stack after optionally making sure the thread
descriptor is still valid. */
extern void __free_tcb (struct pthread *pd) attribute_hidden internal_function;
/* Free allocated stack. */
extern void __deallocate_stack (struct pthread *pd)
attribute_hidden internal_function;
/* Mark all the stacks except for the current one as available. This
function also re-initializes the lock for the stack cache. */
extern void __reclaim_stacks (void) attribute_hidden;
/* Make all threads's stacks executable. */
extern int __make_stacks_executable (void **stack_endp)
internal_function attribute_hidden;
/* longjmp handling. */
extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
#if defined NOT_IN_libc && defined IS_IN_libpthread
hidden_proto (__pthread_cleanup_upto)
#endif
/* Functions with versioned interfaces. */
extern int __pthread_create_2_1 (pthread_t *newthread,
const pthread_attr_t *attr,
void *(*start_routine) (void *), void *arg);
extern int __pthread_create_2_0 (pthread_t *newthread,
const pthread_attr_t *attr,
void *(*start_routine) (void *), void *arg);
extern int __pthread_attr_init_2_1 (pthread_attr_t *attr);
extern int __pthread_attr_init_2_0 (pthread_attr_t *attr);
/* Event handlers for libthread_db interface. */
extern void __nptl_create_event (void);
extern void __nptl_death_event (void);
hidden_proto (__nptl_create_event)
hidden_proto (__nptl_death_event)
/* Register the generation counter in the libpthread with the libc. */
#ifdef TLS_MULTIPLE_THREADS_IN_TCB
extern void __libc_pthread_init (unsigned long int *ptr,
void (*reclaim) (void),
const struct pthread_functions *functions)
internal_function;
#else
extern int *__libc_pthread_init (unsigned long int *ptr,
void (*reclaim) (void),
const struct pthread_functions *functions)
internal_function;
/* Variable set to a nonzero value either if more than one thread runs or ran,
or if a single-threaded process is trying to cancel itself. See
nptl/descr.h for more context on the single-threaded process case. */
extern int __pthread_multiple_threads attribute_hidden;
/* Pointer to the corresponding variable in libc. */
extern int *__libc_multiple_threads_ptr attribute_hidden;
#endif
/* Find a thread given its TID. */
extern struct pthread *__find_thread_by_id (pid_t tid) attribute_hidden
#ifdef SHARED
;
#else
weak_function;
#define __find_thread_by_id(tid) \
(__find_thread_by_id ? (__find_thread_by_id) (tid) : (struct pthread *) NULL)
#endif
extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;
extern size_t __pthread_get_minstack (const pthread_attr_t *attr);
/* Namespace save aliases. */
extern int __pthread_getschedparam (pthread_t thread_id, int *policy,
struct sched_param *param);
extern int __pthread_setschedparam (pthread_t thread_id, int policy,
const struct sched_param *param);
extern int __pthread_setcancelstate (int state, int *oldstate);
extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
const pthread_mutexattr_t *__mutexattr);
extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);
extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
attribute_hidden internal_function;
extern void __pthread_mutex_cond_lock_adjust (pthread_mutex_t *__mutex)
attribute_hidden internal_function;
extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,
int __decr)
attribute_hidden internal_function;
extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);
extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);
extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);
extern int __pthread_attr_destroy (pthread_attr_t *attr);
extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
int *detachstate);
extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
int detachstate);
extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
int *inherit);
extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
struct sched_param *param);
extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
const struct sched_param *param);
extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
int *policy);
extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
extern int __pthread_attr_getstackaddr (const pthread_attr_t *__restrict
__attr, void **__restrict __stackaddr);
extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
void *__stackaddr);
extern int __pthread_attr_getstacksize (const pthread_attr_t *__restrict
__attr,
size_t *__restrict __stacksize);
extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
size_t __stacksize);
extern int __pthread_attr_getstack (const pthread_attr_t *__restrict __attr,
void **__restrict __stackaddr,
size_t *__restrict __stacksize);
extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
size_t __stacksize);
extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
const pthread_rwlockattr_t *__restrict
__attr);
extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
extern int __pthread_cond_broadcast (pthread_cond_t *cond);
extern int __pthread_cond_destroy (pthread_cond_t *cond);
extern int __pthread_cond_init (pthread_cond_t *cond,
const pthread_condattr_t *cond_attr);
extern int __pthread_cond_signal (pthread_cond_t *cond);
extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
extern int __pthread_cond_timedwait (pthread_cond_t *cond,
pthread_mutex_t *mutex,
const struct timespec *abstime);
extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
extern int __pthread_condattr_init (pthread_condattr_t *attr);
extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));
extern void *__pthread_getspecific (pthread_key_t key);
extern int __pthread_setspecific (pthread_key_t key, const void *value);
extern int __pthread_once (pthread_once_t *once_control,
void (*init_routine) (void));
extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),
void (*child) (void));
extern pthread_t __pthread_self (void);
extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
extern int __pthread_kill (pthread_t threadid, int signo);
extern void __pthread_exit (void *value) __attribute__ ((__noreturn__));
extern int __pthread_setcanceltype (int type, int *oldtype);
extern int __pthread_enable_asynccancel (void) attribute_hidden;
extern void __pthread_disable_asynccancel (int oldtype)
internal_function attribute_hidden;
#if defined NOT_IN_libc && defined IS_IN_libpthread
hidden_proto (__pthread_mutex_init)
hidden_proto (__pthread_mutex_destroy)
hidden_proto (__pthread_mutex_lock)
hidden_proto (__pthread_mutex_unlock)
hidden_proto (__pthread_rwlock_rdlock)
hidden_proto (__pthread_rwlock_wrlock)
hidden_proto (__pthread_rwlock_unlock)
hidden_proto (__pthread_key_create)
hidden_proto (__pthread_getspecific)
hidden_proto (__pthread_setspecific)
hidden_proto (__pthread_once)
#endif
extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);
extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond);
extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond,
const pthread_condattr_t *cond_attr);
extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond);
extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond,
pthread_mutex_t *mutex,
const struct timespec *abstime);
extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond,
pthread_mutex_t *mutex);
extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize,
cpu_set_t *cpuset);
/* The two functions are in libc.so and not exported. */
extern int __libc_enable_asynccancel (void) attribute_hidden;
extern void __libc_disable_asynccancel (int oldtype)
internal_function attribute_hidden;
/* The two functions are in librt.so and not exported. */
extern int __librt_enable_asynccancel (void) attribute_hidden;
extern void __librt_disable_asynccancel (int oldtype)
internal_function attribute_hidden;
#ifdef IS_IN_libpthread
/* Special versions which use non-exported functions. */
extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
void (*routine) (void *), void *arg)
attribute_hidden;
# undef pthread_cleanup_push
# define pthread_cleanup_push(routine,arg) \
{ struct _pthread_cleanup_buffer _buffer; \
__pthread_cleanup_push (&_buffer, (routine), (arg));
extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
int execute) attribute_hidden;
# undef pthread_cleanup_pop
# define pthread_cleanup_pop(execute) \
__pthread_cleanup_pop (&_buffer, (execute)); }
#endif
extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
void (*routine) (void *), void *arg);
extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
int execute);
/* Old cleanup interfaces, still used in libc.so. */
extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
void (*routine) (void *), void *arg);
extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
int execute);
extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
void (*routine) (void *), void *arg);
extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
int execute);
extern void __nptl_deallocate_tsd (void) attribute_hidden;
extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;
#ifndef SHARED
extern void __nptl_set_robust (struct pthread *self);
#endif
extern void __free_stacks (size_t limit) attribute_hidden;
extern void __wait_lookup_done (void) attribute_hidden;
#ifdef SHARED
# define PTHREAD_STATIC_FN_REQUIRE(name)
#else
# define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);
#endif
/* Test if the mutex is suitable for the FUTEX_WAIT_REQUEUE_PI operation. */
#if (defined lll_futex_wait_requeue_pi \
&& defined __ASSUME_REQUEUE_PI)
# define USE_REQUEUE_PI(mut) \
((mut) && (mut) != (void *) ~0l \
&& (((mut)->__data.__kind \
& (PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_NORMAL_NP)) \
== PTHREAD_MUTEX_PRIO_INHERIT_NP))
#else
# define USE_REQUEUE_PI(mut) 0
#endif
/* Returns 0 if POL is a valid scheduling policy. */
static inline int
check_sched_policy_attr (int pol)
{
if (pol == SCHED_OTHER || pol == SCHED_FIFO || pol == SCHED_RR)
return 0;
return EINVAL;
}
/* Returns 0 if PR is within the accepted range of priority values for
the scheduling policy POL or EINVAL otherwise. */
static inline int
check_sched_priority_attr (int pr, int pol)
{
int min = __sched_get_priority_min (pol);
int max = __sched_get_priority_max (pol);
if (min >= 0 && max >= 0 && pr >= min && pr <= max)
return 0;
return EINVAL;
}
/* Returns 0 if ST is a valid stack size for a thread stack and EINVAL
otherwise. */
static inline int
check_stacksize_attr (size_t st)
{
if (st >= PTHREAD_STACK_MIN)
return 0;
return EINVAL;
}
/* Defined in pthread_setaffinity.c. */
extern size_t __kernel_cpumask_size attribute_hidden;
extern int __determine_cpumask_size (pid_t tid);
/* Returns 0 if CS and SZ are valid values for the cpuset and cpuset size
respectively. Otherwise it returns an error number. */
static inline int
check_cpuset_attr (const cpu_set_t *cs, const size_t sz)
{
if (__kernel_cpumask_size == 0)
{
int res = __determine_cpumask_size (THREAD_SELF->tid);
if (res)
return res;
}
/* Check whether the new bitmask has any bit set beyond the
last one the kernel accepts. */
for (size_t cnt = __kernel_cpumask_size; cnt < sz; ++cnt)
if (((char *) cs)[cnt] != '\0')
/* Found a nonzero byte. This means the user request cannot be
fulfilled. */
return EINVAL;
return 0;
}
#endif /* pthreadP.h */
Reference in New Issue View Git Blame Copy Permalink