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-rw-r--r--libpthread/linuxthreads/internals.h551
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diff --git a/libpthread/linuxthreads/internals.h b/libpthread/linuxthreads/internals.h
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+++ b/libpthread/linuxthreads/internals.h
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+/* Linuxthreads - a simple clone()-based implementation of Posix */
+/* threads for Linux. */
+/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */
+/* */
+/* This program is free software; you can redistribute it and/or */
+/* modify it under the terms of the GNU Library General Public License */
+/* as published by the Free Software Foundation; either version 2 */
+/* of the License, or (at your option) any later version. */
+/* */
+/* This program 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 Library General Public License for more details. */
+
+#ifndef _INTERNALS_H
+#define _INTERNALS_H 1
+
+#include "uClibc-glue.h"
+
+/* Internal data structures */
+
+/* Includes */
+
+#include <limits.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <sys/ucontext.h>
+#include <bits/stackinfo.h>
+#include <bits/sigcontextinfo.h>
+#include <bits/pthreadtypes.h>
+
+#ifdef USE_TLS
+#include <tls.h>
+#endif
+#include "descr.h"
+
+#include "semaphore.h"
+#include <pthread-functions.h>
+
+#ifndef THREAD_GETMEM
+# define THREAD_GETMEM(descr, member) descr->member
+#endif
+#ifndef THREAD_GETMEM_NC
+# define THREAD_GETMEM_NC(descr, member) descr->member
+#endif
+#ifndef THREAD_SETMEM
+# define THREAD_SETMEM(descr, member, value) descr->member = (value)
+#endif
+#ifndef THREAD_SETMEM_NC
+# define THREAD_SETMEM_NC(descr, member, value) descr->member = (value)
+#endif
+
+#if !defined NOT_IN_libc && defined FLOATING_STACKS
+# define LIBC_THREAD_GETMEM(descr, member) THREAD_GETMEM (descr, member)
+# define LIBC_THREAD_SETMEM(descr, member, value) \
+ THREAD_SETMEM (descr, member, value)
+#else
+# define LIBC_THREAD_GETMEM(descr, member) descr->member
+# define LIBC_THREAD_SETMEM(descr, member, value) descr->member = (value)
+#endif
+
+typedef void (*destr_function)(void *);
+
+struct pthread_key_struct {
+ int in_use; /* already allocated? */
+ destr_function destr; /* destruction routine */
+};
+
+
+#define PTHREAD_START_ARGS_INITIALIZER(fct) \
+ { (void *(*) (void *)) fct, NULL, {{0, }}, 0, { 0 } }
+
+
+/* The type of thread handles. */
+
+typedef struct pthread_handle_struct * pthread_handle;
+
+struct pthread_handle_struct {
+ struct _pthread_fastlock h_lock; /* Fast lock for sychronized access */
+ pthread_descr h_descr; /* Thread descriptor or NULL if invalid */
+ char * h_bottom; /* Lowest address in the stack thread */
+};
+
+/* The type of messages sent to the thread manager thread */
+
+struct pthread_request {
+ pthread_descr req_thread; /* Thread doing the request */
+ enum { /* Request kind */
+ REQ_CREATE, REQ_FREE, REQ_PROCESS_EXIT, REQ_MAIN_THREAD_EXIT,
+ REQ_POST, REQ_DEBUG, REQ_KICK, REQ_FOR_EACH_THREAD
+ } req_kind;
+ union { /* Arguments for request */
+ struct { /* For REQ_CREATE: */
+ const pthread_attr_t * attr; /* thread attributes */
+ void * (*fn)(void *); /* start function */
+ void * arg; /* argument to start function */
+ sigset_t mask; /* signal mask */
+ } create;
+ struct { /* For REQ_FREE: */
+ pthread_t thread_id; /* identifier of thread to free */
+ } free;
+ struct { /* For REQ_PROCESS_EXIT: */
+ int code; /* exit status */
+ } exit;
+ void * post; /* For REQ_POST: the semaphore */
+ struct { /* For REQ_FOR_EACH_THREAD: callback */
+ void (*fn)(void *, pthread_descr);
+ void *arg;
+ } for_each;
+ } req_args;
+};
+
+
+
+typedef void (*arch_sighandler_t) (int, SIGCONTEXT);
+union sighandler
+{
+ arch_sighandler_t old;
+ void (*rt) (int, struct siginfo *, struct ucontext *);
+};
+extern union sighandler __sighandler[NSIG];
+
+
+/* Signals used for suspend/restart and for cancellation notification. */
+
+extern int __pthread_sig_restart;
+extern int __pthread_sig_cancel;
+
+/* Signal used for interfacing with gdb */
+
+extern int __pthread_sig_debug;
+
+/* Global array of thread handles, used for validating a thread id
+ and retrieving the corresponding thread descriptor. Also used for
+ mapping the available stack segments. */
+
+extern struct pthread_handle_struct __pthread_handles[PTHREAD_THREADS_MAX];
+
+/* Descriptor of the main thread */
+
+extern pthread_descr __pthread_main_thread;
+
+/* File descriptor for sending requests to the thread manager.
+ Initially -1, meaning that __pthread_initialize_manager must be called. */
+
+extern int __pthread_manager_request;
+
+/* Other end of the pipe for sending requests to the thread manager. */
+
+extern int __pthread_manager_reader;
+
+#ifdef FLOATING_STACKS
+/* Maximum stack size. */
+extern size_t __pthread_max_stacksize;
+#endif
+
+/* Pending request for a process-wide exit */
+
+extern int __pthread_exit_requested, __pthread_exit_code;
+
+/* Set to 1 by gdb if we're debugging */
+
+extern volatile int __pthread_threads_debug;
+
+/* Globally enabled events. */
+extern volatile td_thr_events_t __pthread_threads_events;
+
+/* Pointer to descriptor of thread with last event. */
+extern volatile pthread_descr __pthread_last_event;
+
+/* Flag which tells whether we are executing on SMP kernel. */
+extern int __pthread_smp_kernel;
+
+/* Return the handle corresponding to a thread id */
+
+static inline pthread_handle thread_handle(pthread_t id)
+{
+ return &__pthread_handles[id % PTHREAD_THREADS_MAX];
+}
+
+/* Validate a thread handle. Must have acquired h->h_spinlock before. */
+
+static inline int invalid_handle(pthread_handle h, pthread_t id)
+{
+ return h->h_descr == NULL || h->h_descr->p_tid != id || h->h_descr->p_terminated;
+}
+
+static inline int nonexisting_handle(pthread_handle h, pthread_t id)
+{
+ return h->h_descr == NULL || h->h_descr->p_tid != id;
+}
+
+/* Fill in defaults left unspecified by pt-machine.h. */
+
+/* We round up a value with page size. */
+#ifndef page_roundup
+#define page_roundup(v,p) ((((size_t) (v)) + (p) - 1) & ~((p) - 1))
+#endif
+
+/* The page size we can get from the system. This should likely not be
+ changed by the machine file but, you never know. */
+#ifndef PAGE_SIZE
+#define PAGE_SIZE (sysconf (_SC_PAGE_SIZE))
+#endif
+
+/* The initial size of the thread stack. Must be a multiple of PAGE_SIZE. */
+#ifndef INITIAL_STACK_SIZE
+#define INITIAL_STACK_SIZE (4 * PAGE_SIZE)
+#endif
+
+/* Size of the thread manager stack. The "- 32" avoids wasting space
+ with some malloc() implementations. */
+#ifndef THREAD_MANAGER_STACK_SIZE
+#define THREAD_MANAGER_STACK_SIZE (2 * PAGE_SIZE - 32)
+#endif
+
+/* The base of the "array" of thread stacks. The array will grow down from
+ here. Defaults to the calculated bottom of the initial application
+ stack. */
+#ifndef THREAD_STACK_START_ADDRESS
+#define THREAD_STACK_START_ADDRESS __pthread_initial_thread_bos
+#endif
+
+/* If MEMORY_BARRIER isn't defined in pt-machine.h, assume the
+ architecture doesn't need a memory barrier instruction (e.g. Intel
+ x86). Still we need the compiler to respect the barrier and emit
+ all outstanding operations which modify memory. Some architectures
+ distinguish between full, read and write barriers. */
+
+#ifndef MEMORY_BARRIER
+#define MEMORY_BARRIER() asm ("" : : : "memory")
+#endif
+#ifndef READ_MEMORY_BARRIER
+#define READ_MEMORY_BARRIER() MEMORY_BARRIER()
+#endif
+#ifndef WRITE_MEMORY_BARRIER
+#define WRITE_MEMORY_BARRIER() MEMORY_BARRIER()
+#endif
+
+/* Max number of times we must spin on a spinlock calling sched_yield().
+ After MAX_SPIN_COUNT iterations, we put the calling thread to sleep. */
+
+#ifndef MAX_SPIN_COUNT
+#define MAX_SPIN_COUNT 50
+#endif
+
+/* Max number of times the spinlock in the adaptive mutex implementation
+ spins actively on SMP systems. */
+
+#ifndef MAX_ADAPTIVE_SPIN_COUNT
+#define MAX_ADAPTIVE_SPIN_COUNT 100
+#endif
+
+/* Duration of sleep (in nanoseconds) when we can't acquire a spinlock
+ after MAX_SPIN_COUNT iterations of sched_yield().
+ With the 2.0 and 2.1 kernels, this MUST BE > 2ms.
+ (Otherwise the kernel does busy-waiting for realtime threads,
+ giving other threads no chance to run.) */
+
+#ifndef SPIN_SLEEP_DURATION
+#define SPIN_SLEEP_DURATION 2000001
+#endif
+
+/* Defined and used in libc.so. */
+extern int __libc_multiple_threads attribute_hidden;
+extern int __librt_multiple_threads;
+
+/* Debugging */
+
+#ifdef DEBUG
+#include <assert.h>
+#define ASSERT assert
+#define MSG __pthread_message
+#else
+#define ASSERT(x)
+#define MSG(msg,arg...)
+#endif
+
+/* Internal global functions */
+
+extern void __pthread_do_exit (void *retval, char *currentframe)
+ __attribute__ ((__noreturn__));
+extern void __pthread_destroy_specifics (void);
+extern void __pthread_perform_cleanup (char *currentframe);
+extern void __pthread_init_max_stacksize (void);
+extern int __pthread_initialize_manager (void);
+extern void __pthread_message (const char * fmt, ...);
+extern int __pthread_manager (void *reqfd);
+extern int __pthread_manager_event (void *reqfd);
+extern void __pthread_manager_sighandler (int sig);
+extern void __pthread_reset_main_thread (void);
+extern void __pthread_once_fork_prepare (void);
+extern void __pthread_once_fork_parent (void);
+extern void __pthread_once_fork_child (void);
+extern void __flockfilelist (void);
+extern void __funlockfilelist (void);
+extern void __fresetlockfiles (void);
+extern void __pthread_manager_adjust_prio (int thread_prio);
+extern void __pthread_initialize_minimal (void);
+
+extern int __pthread_attr_setguardsize (pthread_attr_t *__attr,
+ size_t __guardsize);
+extern int __pthread_attr_getguardsize (const pthread_attr_t *__attr,
+ size_t *__guardsize);
+extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
+ void *__stackaddr);
+extern int __pthread_attr_getstackaddr (const pthread_attr_t *__attr,
+ void **__stackaddr);
+extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
+ size_t __stacksize);
+extern int __pthread_attr_getstacksize (const pthread_attr_t *__attr,
+ size_t *__stacksize);
+extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
+ size_t __stacksize);
+extern int __pthread_attr_getstack (const pthread_attr_t *__attr, void **__stackaddr,
+ size_t *__stacksize);
+extern int __pthread_attr_destroy (pthread_attr_t *attr);
+extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
+ int detachstate);
+extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
+ int *detachstate);
+extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
+ const struct sched_param *param);
+extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
+ struct sched_param *param);
+extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
+extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
+ int *policy);
+extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
+extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
+ int *inherit);
+extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
+extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
+
+extern int __pthread_getconcurrency (void);
+extern int __pthread_setconcurrency (int __level);
+extern int __pthread_mutex_timedlock (pthread_mutex_t *__mutex,
+ const struct timespec *__abstime);
+extern int __pthread_mutexattr_getpshared (const pthread_mutexattr_t *__attr,
+ int *__pshared);
+extern int __pthread_mutexattr_setpshared (pthread_mutexattr_t *__attr,
+ int __pshared);
+extern int __pthread_mutexattr_gettype (const pthread_mutexattr_t *__attr,
+ int *__kind);
+extern void __pthread_kill_other_threads_np (void);
+extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
+ __const pthread_mutexattr_t *__mutex_attr);
+extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
+extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
+extern int __pthread_mutex_trylock (pthread_mutex_t *__mutex);
+extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
+#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_trylock)
+hidden_proto (__pthread_mutex_unlock)
+#endif
+extern int __pthread_cond_init (pthread_cond_t *cond,
+ const pthread_condattr_t *cond_attr);
+extern int __pthread_cond_destroy (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_cond_signal (pthread_cond_t *cond);
+extern int __pthread_cond_broadcast (pthread_cond_t *cond);
+extern int __pthread_condattr_init (pthread_condattr_t *attr);
+extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
+extern pthread_t __pthread_self (void);
+extern pthread_descr __pthread_thread_self (void);
+extern pthread_descr __pthread_self_stack (void) attribute_hidden;
+extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
+extern void __pthread_exit (void *retval);
+extern int __pthread_getschedparam (pthread_t thread, int *policy,
+ struct sched_param *param);
+extern int __pthread_setschedparam (pthread_t thread, int policy,
+ const struct sched_param *param);
+extern int __pthread_setcancelstate (int state, int * oldstate);
+extern int __pthread_setcanceltype (int type, int * oldtype);
+
+extern void __pthread_restart_old(pthread_descr th);
+extern void __pthread_suspend_old(pthread_descr self);
+extern int __pthread_timedsuspend_old(pthread_descr self, const struct timespec *abs);
+
+extern void __pthread_restart_new(pthread_descr th);
+extern void __pthread_suspend_new(pthread_descr self);
+extern int __pthread_timedsuspend_new(pthread_descr self, const struct timespec *abs);
+
+extern void __pthread_wait_for_restart_signal(pthread_descr self);
+
+extern void __pthread_sigsuspend (const sigset_t *mask) attribute_hidden;
+
+extern int __pthread_yield (void);
+
+extern int __pthread_rwlock_timedrdlock (pthread_rwlock_t *__restrict __rwlock,
+ __const struct timespec *__restrict
+ __abstime);
+extern int __pthread_rwlock_timedwrlock (pthread_rwlock_t *__restrict __rwlock,
+ __const struct timespec *__restrict
+ __abstime);
+extern int __pthread_rwlockattr_destroy (pthread_rwlockattr_t *__attr);
+
+extern int __pthread_barrierattr_getpshared (__const pthread_barrierattr_t *
+ __restrict __attr,
+ int *__restrict __pshared);
+
+extern int __pthread_spin_lock (pthread_spinlock_t *__lock);
+extern int __pthread_spin_trylock (pthread_spinlock_t *__lock);
+extern int __pthread_spin_unlock (pthread_spinlock_t *__lock);
+extern int __pthread_spin_init (pthread_spinlock_t *__lock, int __pshared);
+extern int __pthread_spin_destroy (pthread_spinlock_t *__lock);
+
+/* Global pointers to old or new suspend functions */
+
+extern void (*__pthread_restart)(pthread_descr);
+extern void (*__pthread_suspend)(pthread_descr);
+extern int (*__pthread_timedsuspend)(pthread_descr, const struct timespec *);
+
+/* Prototypes for the function without cancelation support when the
+ normal version has it. */
+extern int __libc_close (int fd);
+extern int __libc_nanosleep (const struct timespec *requested_time,
+ struct timespec *remaining);
+/* Prototypes for some of the new semaphore functions. */
+extern int sem_post (sem_t * sem);
+extern int sem_init (sem_t *__sem, int __pshared, unsigned int __value);
+extern int sem_wait (sem_t *__sem);
+extern int sem_trywait (sem_t *__sem);
+extern int sem_getvalue (sem_t *__restrict __sem, int *__restrict __sval);
+extern int sem_destroy (sem_t *__sem);
+
+/* Prototypes for compatibility functions. */
+extern int __pthread_attr_init (pthread_attr_t *__attr);
+extern int __pthread_create (pthread_t *__restrict __threadp,
+ const pthread_attr_t *__attr,
+ void *(*__start_routine) (void *),
+ void *__restrict __arg);
+
+/* The functions called the signal events. */
+extern void __linuxthreads_create_event (void);
+extern void __linuxthreads_death_event (void);
+extern void __linuxthreads_reap_event (void);
+
+/* This function is called to initialize the pthread library. */
+extern void __pthread_initialize (void);
+
+/* TSD. */
+extern int __pthread_internal_tsd_set (int key, const void * pointer);
+extern void * __pthread_internal_tsd_get (int key);
+extern void ** __attribute__ ((__const__))
+ __pthread_internal_tsd_address (int key);
+
+/* Sighandler wrappers. */
+extern void __pthread_sighandler(int signo, SIGCONTEXT ctx);
+extern void __pthread_sighandler_rt(int signo, struct siginfo *si,
+ struct ucontext *uc);
+extern void __pthread_null_sighandler(int sig);
+extern int __pthread_sigaction (int sig, const struct sigaction *act,
+ struct sigaction *oact);
+extern int __pthread_sigwait (const sigset_t *set, int *sig);
+extern int __pthread_raise (int sig);
+
+/* Cancellation. */
+extern int __pthread_enable_asynccancel (void) attribute_hidden;
+extern void __pthread_disable_asynccancel (int oldtype)
+ internal_function attribute_hidden;
+
+/* 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 libc.so and are exported. */
+extern int __librt_enable_asynccancel (void);
+extern void __librt_disable_asynccancel (int oldtype) internal_function;
+
+extern void __pthread_cleanup_upto (__jmp_buf target,
+ char *targetframe) attribute_hidden;
+extern pid_t __pthread_fork (struct fork_block *b) attribute_hidden;
+
+#if !defined NOT_IN_libc
+# define LIBC_CANCEL_ASYNC() \
+ __libc_enable_asynccancel ()
+# 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 IS_IN_libpthread
+# define LIBC_CANCEL_ASYNC() \
+ __pthread_enable_asynccancel ()
+# define LIBC_CANCEL_RESET(oldtype) \
+ __pthread_disable_asynccancel (oldtype)
+# define LIBC_CANCEL_HANDLED() \
+ __asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \
+ __asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")
+#elif defined IS_IN_librt
+# define LIBC_CANCEL_ASYNC() \
+ __librt_enable_asynccancel ()
+# define LIBC_CANCEL_RESET(oldtype) \
+ __librt_disable_asynccancel (oldtype)
+# 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
+
+extern int * __libc_pthread_init (const struct pthread_functions *functions);
+
+#if !defined NOT_IN_libc && !defined FLOATING_STACKS
+# ifdef SHARED
+# define thread_self() \
+ (*__libc_pthread_functions.ptr_pthread_thread_self) ()
+# else
+weak_extern (__pthread_thread_self)
+# define thread_self() __pthread_thread_self ()
+# endif
+#endif
+
+#ifndef USE_TLS
+# define __manager_thread (&__pthread_manager_thread)
+#else
+# define __manager_thread __pthread_manager_threadp
+#endif
+
+extern inline __attribute__((always_inline)) pthread_descr
+check_thread_self (void)
+{
+ pthread_descr self = thread_self ();
+#if defined THREAD_SELF && defined INIT_THREAD_SELF
+ if (self == __manager_thread)
+ {
+ /* A new thread might get a cancel signal before it is fully
+ initialized, so that the thread register might still point to the
+ manager thread. Double check that this is really the manager
+ thread. */
+ self = __pthread_self_stack();
+ if (self != __manager_thread)
+ /* Oops, thread_self() isn't working yet.. */
+ INIT_THREAD_SELF(self, self->p_nr);
+ }
+#endif
+ return self;
+}
+
+#endif /* internals.h */
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