libpthread/nptl: core of the "Native Posix Threading Library" for uClibc

targetting arm,sh,i386,mips,sparc for now

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

1 files changed, 466 insertions, 0 deletions

diff --git a/libpthread/nptl/pthreadP.h b/libpthread/nptl/pthreadP.h
new file mode 100644
index 000000000..45222f45e
--- /dev/null
+++ b/libpthread/nptl/pthreadP.h
@@ -0,0 +1,466 @@
+/* Copyright (C) 2002, 2003, 2004 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 <stdbool.h>
+#include <sys/syscall.h>
+#include "descr.h"
+#include <tls.h>
+#include <lowlevellock.h>
+#include <bits/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
+
+
+/* Adaptive mutex definitions.  */
+#ifndef MAX_ADAPTIVE_COUNT
+# define MAX_ADAPTIVE_COUNT 100
+#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;
+
+/* 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 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__))
+#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);
+# 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 " __USER_LABEL_PREFIX__ "__libc_enable_asynccancel"); \
+  __asm (".globl " __USER_LABEL_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 " __USER_LABEL_PREFIX__ "__pthread_enable_asynccancel"); \
+  __asm (".globl " __USER_LABEL_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 " __USER_LABEL_PREFIX__ "__librt_enable_asynccancel"); \
+  __asm (".globl " __USER_LABEL_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 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
+
+/* 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;
+
+
+/* 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)
+     attribute_hidden;
+extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
+extern int __pthread_mutex_destroy_internal (pthread_mutex_t *__mutex)
+     attribute_hidden;
+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)
+     attribute_hidden;
+extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
+     attribute_hidden internal_function;
+extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
+extern int __pthread_mutex_unlock_internal (pthread_mutex_t *__mutex)
+     attribute_hidden;
+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_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);
+
+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;
+
+#ifdef SHARED
+# define PTHREAD_STATIC_FN_REQUIRE(name)
+#else
+# define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);
+#endif
+
+#endif	/* pthreadP.h */