mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
392 lines
16 KiB
C
392 lines
16 KiB
C
/* Copyright (C) 2002, 2003 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#ifndef _PTHREADP_H
|
|
#define _PTHREADP_H 1
|
|
|
|
#include <pthread.h>
|
|
#include <setjmp.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>
|
|
|
|
|
|
/* 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
|
|
|
|
|
|
/* Internal variables. */
|
|
|
|
|
|
/* Default stack size. */
|
|
extern size_t __default_stacksize 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;
|
|
|
|
/* Thread descriptor handling. */
|
|
extern list_t __stack_user;
|
|
hidden_proto (__stack_user)
|
|
|
|
/* Attribute handling. */
|
|
extern struct pthread_attr *__attr_list attribute_hidden;
|
|
extern lll_lock_t __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;
|
|
|
|
/* 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__))
|
|
#ifndef SHARED
|
|
weak_function
|
|
#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
|
|
|
|
|
|
/* 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;
|
|
|
|
/* longjmp handling. */
|
|
extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
|
|
|
|
|
|
/* 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 if more than one thread runs or ran. */
|
|
extern int __pthread_multiple_threads attribute_hidden;
|
|
/* Pointer to the corresponding variable in libc. */
|
|
extern int *__libc_multiple_threads_ptr attribute_hidden;
|
|
#endif
|
|
|
|
|
|
/* 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_init_internal (pthread_mutex_t *__mutex,
|
|
__const pthread_mutexattr_t *__mutexattr);
|
|
extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
|
|
extern int __pthread_mutex_destroy_internal (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_lock_internal (pthread_mutex_t *__mutex);
|
|
extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
|
|
attribute_hidden;
|
|
extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
|
|
extern int __pthread_mutex_unlock_internal (pthread_mutex_t *__mutex);
|
|
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_rdlock_internal (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_wrlock_internal (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_rwlock_unlock_internal (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 int __pthread_key_create_internal (pthread_key_t *key,
|
|
void (*destr) (void *));
|
|
extern void *__pthread_getspecific (pthread_key_t key);
|
|
extern void *__pthread_getspecific_internal (pthread_key_t key);
|
|
extern int __pthread_setspecific (pthread_key_t key, const void *value);
|
|
extern int __pthread_setspecific_internal (pthread_key_t key,
|
|
const void *value);
|
|
extern int __pthread_once (pthread_once_t *once_control,
|
|
void (*init_routine) (void));
|
|
extern int __pthread_once_internal (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);
|
|
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;
|
|
|
|
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);
|
|
|
|
|
|
/* 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);
|
|
|
|
#endif /* pthreadP.h */
|