2.5-18.1

1 files changed, 0 insertions, 573 deletions

diff --git a/linuxthreads/sysdeps/pthread/timer_routines.c b/linuxthreads/sysdeps/pthread/timer_routines.c
deleted file mode 100644
index 3877b86fbb..0000000000
--- a/linuxthreads/sysdeps/pthread/timer_routines.c
+++ /dev/null
@@ -1,573 +0,0 @@
-/* Helper code for POSIX timer implementation on LinuxThreads.
-   Copyright (C) 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Kaz Kylheku <kaz@ashi.footprints.net>.
-
-   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; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-#include <assert.h>
-#include <errno.h>
-#include <pthread.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sysdep.h>
-#include <time.h>
-#include <unistd.h>
-#include <sys/syscall.h>
-
-#include "posix-timer.h"
-
-
-/* Number of threads used.  */
-#define THREAD_MAXNODES	16
-
-/* Array containing the descriptors for the used threads.  */
-static struct thread_node thread_array[THREAD_MAXNODES];
-
-/* Static array with the structures for all the timers.  */
-struct timer_node __timer_array[TIMER_MAX];
-
-/* Global lock to protect operation on the lists.  */
-pthread_mutex_t __timer_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-/* Variable to protext initialization.  */
-pthread_once_t __timer_init_once_control = PTHREAD_ONCE_INIT;
-
-/* Nonzero if initialization of timer implementation failed.  */
-int __timer_init_failed;
-
-/* Node for the thread used to deliver signals.  */
-struct thread_node __timer_signal_thread_rclk;
-
-/* Lists to keep free and used timers and threads.  */
-struct list_links timer_free_list;
-struct list_links thread_free_list;
-struct list_links thread_active_list;
-
-
-#ifdef __NR_rt_sigqueueinfo
-extern int __syscall_rt_sigqueueinfo (int, int, siginfo_t *);
-#endif
-
-
-/* List handling functions.  */
-static inline void
-list_init (struct list_links *list)
-{
-  list->next = list->prev = list;
-}
-
-static inline void
-list_append (struct list_links *list, struct list_links *newp)
-{
-  newp->prev = list->prev;
-  newp->next = list;
-  list->prev->next = newp;
-  list->prev = newp;
-}
-
-static inline void
-list_insbefore (struct list_links *list, struct list_links *newp)
-{
-  list_append (list, newp);
-}
-
-/*
- * Like list_unlink_ip, except that calling it on a node that
- * is already unlinked is disastrous rather than a noop.
- */
-
-static inline void
-list_unlink (struct list_links *list)
-{
-  struct list_links *lnext = list->next, *lprev = list->prev;
-
-  lnext->prev = lprev;
-  lprev->next = lnext;
-}
-
-static inline struct list_links *
-list_first (struct list_links *list)
-{
-  return list->next;
-}
-
-static inline struct list_links *
-list_null (struct list_links *list)
-{
-  return list;
-}
-
-static inline struct list_links *
-list_next (struct list_links *list)
-{
-  return list->next;
-}
-
-static inline int
-list_isempty (struct list_links *list)
-{
-  return list->next == list;
-}
-
-
-/* Functions build on top of the list functions.  */
-static inline struct thread_node *
-thread_links2ptr (struct list_links *list)
-{
-  return (struct thread_node *) ((char *) list
-				 - offsetof (struct thread_node, links));
-}
-
-static inline struct timer_node *
-timer_links2ptr (struct list_links *list)
-{
-  return (struct timer_node *) ((char *) list
-				- offsetof (struct timer_node, links));
-}
-
-
-/* Initialize a newly allocated thread structure.  */
-static void
-thread_init (struct thread_node *thread, const pthread_attr_t *attr, clockid_t clock_id)
-{
-  if (attr != NULL)
-    thread->attr = *attr;
-  else
-    {
-      pthread_attr_init (&thread->attr);
-      pthread_attr_setdetachstate (&thread->attr, PTHREAD_CREATE_DETACHED);
-    }
-
-  thread->exists = 0;
-  list_init (&thread->timer_queue);
-  pthread_cond_init (&thread->cond, 0);
-  thread->current_timer = 0;
-  thread->captured = pthread_self ();
-  thread->clock_id = clock_id;
-}
-
-
-/* Initialize the global lists, and acquire global resources.  Error
-   reporting is done by storing a non-zero value to the global variable
-   timer_init_failed.  */
-static void
-init_module (void)
-{
-  int i;
-
-  list_init (&timer_free_list);
-  list_init (&thread_free_list);
-  list_init (&thread_active_list);
-
-  for (i = 0; i < TIMER_MAX; ++i)
-    {
-      list_append (&timer_free_list, &__timer_array[i].links);
-      __timer_array[i].inuse = TIMER_FREE;
-    }
-
-  for (i = 0; i < THREAD_MAXNODES; ++i)
-    list_append (&thread_free_list, &thread_array[i].links);
-
-  thread_init (&__timer_signal_thread_rclk, 0, CLOCK_REALTIME);
-}
-
-
-/* This is a handler executed in a child process after a fork()
-   occurs.  It reinitializes the module, resetting all of the data
-   structures to their initial state.  The mutex is initialized in
-   case it was locked in the parent process.  */
-static void
-reinit_after_fork (void)
-{
-  init_module ();
-  pthread_mutex_init (&__timer_mutex, 0);
-}
-
-
-/* Called once form pthread_once in timer_init. This initializes the
-   module and ensures that reinit_after_fork will be executed in any
-   child process.  */
-void
-__timer_init_once (void)
-{
-  init_module ();
-  pthread_atfork (0, 0, reinit_after_fork);
-}
-
-
-/* Deinitialize a thread that is about to be deallocated.  */
-static void
-thread_deinit (struct thread_node *thread)
-{
-  assert (list_isempty (&thread->timer_queue));
-  pthread_cond_destroy (&thread->cond);
-}
-
-
-/* Allocate a thread structure from the global free list.  Global
-   mutex lock must be held by caller.  The thread is moved to
-   the active list. */
-struct thread_node *
-__timer_thread_alloc (const pthread_attr_t *desired_attr, clockid_t clock_id)
-{
-  struct list_links *node = list_first (&thread_free_list);
-
-  if (node != list_null (&thread_free_list))
-    {
-      struct thread_node *thread = thread_links2ptr (node);
-      list_unlink (node);
-      thread_init (thread, desired_attr, clock_id);
-      list_append (&thread_active_list, node);
-      return thread;
-    }
-
-  return 0;
-}
-
-
-/* Return a thread structure to the global free list.  Global lock
-   must be held by caller.  */
-void
-__timer_thread_dealloc (struct thread_node *thread)
-{
-  thread_deinit (thread);
-  list_unlink (&thread->links);
-  list_append (&thread_free_list, &thread->links);
-}
-
-
-/* Each of our threads which terminates executes this cleanup
-   handler. We never terminate threads ourselves; if a thread gets here
-   it means that the evil application has killed it.  If the thread has
-   timers, these require servicing and so we must hire a replacement
-   thread right away.  We must also unblock another thread that may
-   have been waiting for this thread to finish servicing a timer (see
-   timer_delete()).  */
-
-static void
-thread_cleanup (void *val)
-{
-  if (val != NULL)
-    {
-      struct thread_node *thread = val;
-
-      /* How did the signal thread get killed?  */
-      assert (thread != &__timer_signal_thread_rclk);
-
-      pthread_mutex_lock (&__timer_mutex);
-
-      thread->exists = 0;
-
-      /* We are no longer processing a timer event.  */
-      thread->current_timer = 0;
-
-      if (list_isempty (&thread->timer_queue))
-	  __timer_thread_dealloc (thread);
-      else
-	(void) __timer_thread_start (thread);
-
-      pthread_mutex_unlock (&__timer_mutex);
-
-      /* Unblock potentially blocked timer_delete().  */
-      pthread_cond_broadcast (&thread->cond);
-    }
-}
-
-
-/* Handle a timer which is supposed to go off now.  */
-static void
-thread_expire_timer (struct thread_node *self, struct timer_node *timer)
-{
-  self->current_timer = timer; /* Lets timer_delete know timer is running. */
-
-  pthread_mutex_unlock (&__timer_mutex);
-
-  switch (__builtin_expect (timer->event.sigev_notify, SIGEV_SIGNAL))
-    {
-    case SIGEV_NONE:
-      break;
-
-    case SIGEV_SIGNAL:
-#ifdef __NR_rt_sigqueueinfo
-      {
-	siginfo_t info;
-
-	/* First, clear the siginfo_t structure, so that we don't pass our
-	   stack content to other tasks.  */
-	memset (&info, 0, sizeof (siginfo_t));
-	/* We must pass the information about the data in a siginfo_t
-           value.  */
-	info.si_signo = timer->event.sigev_signo;
-	info.si_code = SI_TIMER;
-	info.si_pid = timer->creator_pid;
-	info.si_uid = getuid ();
-	info.si_value = timer->event.sigev_value;
-
-	INLINE_SYSCALL (rt_sigqueueinfo, 3, info.si_pid, info.si_signo, &info);
-      }
-#else
-      if (pthread_kill (self->captured, timer->event.sigev_signo) != 0)
-	{
-	  if (pthread_kill (self->id, timer->event.sigev_signo) != 0)
-	    abort ();
-        }
-#endif
-      break;
-
-    case SIGEV_THREAD:
-      timer->event.sigev_notify_function (timer->event.sigev_value);
-      break;
-
-    default:
-      assert (! "unknown event");
-      break;
-    }
-
-  pthread_mutex_lock (&__timer_mutex);
-
-  self->current_timer = 0;
-
-  pthread_cond_broadcast (&self->cond);
-}
-
-
-/* Thread function; executed by each timer thread. The job of this
-   function is to wait on the thread's timer queue and expire the
-   timers in chronological order as close to their scheduled time as
-   possible.  */
-static void
-__attribute__ ((noreturn))
-thread_func (void *arg)
-{
-  struct thread_node *self = arg;
-
-  /* Register cleanup handler, in case rogue application terminates
-     this thread.  (This cannot happen to __timer_signal_thread, which
-     doesn't invoke application callbacks). */
-
-  pthread_cleanup_push (thread_cleanup, self);
-
-  pthread_mutex_lock (&__timer_mutex);
-
-  while (1)
-    {
-      struct list_links *first;
-      struct timer_node *timer = NULL;
-
-      /* While the timer queue is not empty, inspect the first node.  */
-      first = list_first (&self->timer_queue);
-      if (first != list_null (&self->timer_queue))
-	{
-	  struct timespec now;
-
-	  timer = timer_links2ptr (first);
-
-	  /* This assumes that the elements of the list of one thread
-	     are all for the same clock.  */
-	  clock_gettime (timer->clock, &now);
-
-	  while (1)
-	    {
-	      /* If the timer is due or overdue, remove it from the queue.
-		 If it's a periodic timer, re-compute its new time and
-		 requeue it.  Either way, perform the timer expiry. */
-	      if (timespec_compare (&now, &timer->expirytime) < 0)
-		break;
-
-	      list_unlink_ip (first);
-
-	      if (__builtin_expect (timer->value.it_interval.tv_sec, 0) != 0
-		  || timer->value.it_interval.tv_nsec != 0)
-		{
-		  timer->overrun_count = 0;
-		  timespec_add (&timer->expirytime, &timer->expirytime,
-				&timer->value.it_interval);
-		  while (timespec_compare (&timer->expirytime, &now) < 0)
-		    {
-		      timespec_add (&timer->expirytime, &timer->expirytime,
-				    &timer->value.it_interval);
-		      if (timer->overrun_count < DELAYTIMER_MAX)
-			++timer->overrun_count;
-		    }
-		  __timer_thread_queue_timer (self, timer);
-		}
-
-	      thread_expire_timer (self, timer);
-
-	      first = list_first (&self->timer_queue);
-	      if (first == list_null (&self->timer_queue))
-		break;
-
-	      timer = timer_links2ptr (first);
-	    }
-	}
-
-      /* If the queue is not empty, wait until the expiry time of the
-	 first node.  Otherwise wait indefinitely.  Insertions at the
-	 head of the queue must wake up the thread by broadcasting
-	 this condition variable.  */
-      if (timer != NULL)
-	pthread_cond_timedwait (&self->cond, &__timer_mutex,
-				&timer->expirytime);
-      else
-	pthread_cond_wait (&self->cond, &__timer_mutex);
-    }
-  /* This macro will never be executed since the while loop loops
-     forever - but we have to add it for proper nesting.  */
-  pthread_cleanup_pop (1);
-}
-
-
-/* Enqueue a timer in wakeup order in the thread's timer queue.
-   Returns 1 if the timer was inserted at the head of the queue,
-   causing the queue's next wakeup time to change. */
-
-int
-__timer_thread_queue_timer (struct thread_node *thread,
-			    struct timer_node *insert)
-{
-  struct list_links *iter;
-  int athead = 1;
-
-  for (iter = list_first (&thread->timer_queue);
-       iter != list_null (&thread->timer_queue);
-        iter = list_next (iter))
-    {
-      struct timer_node *timer = timer_links2ptr (iter);
-
-      if (timespec_compare (&insert->expirytime, &timer->expirytime) < 0)
-	  break;
-      athead = 0;
-    }
-
-  list_insbefore (iter, &insert->links);
-  return athead;
-}
-
-
-/* Start a thread and associate it with the given thread node.  Global
-   lock must be held by caller.  */
-int
-__timer_thread_start (struct thread_node *thread)
-{
-  int retval = 1;
-
-  assert (!thread->exists);
-  thread->exists = 1;
-
-  if (pthread_create (&thread->id, &thread->attr,
-		      (void *(*) (void *)) thread_func, thread) != 0)
-    {
-      thread->exists = 0;
-      retval = -1;
-    }
-
-  return retval;
-}
-
-
-void
-__timer_thread_wakeup (struct thread_node *thread)
-{
-  pthread_cond_broadcast (&thread->cond);
-}
-
-
-/* Compare two pthread_attr_t thread attributes for exact equality.
-   Returns 1 if they are equal, otherwise zero if they are not equal or
-   contain illegal values.  This version is LinuxThreads-specific for
-   performance reason.  One could use the access functions to get the
-   values of all the fields of the attribute structure.  */
-static int
-thread_attr_compare (const pthread_attr_t *left, const pthread_attr_t *right)
-{
-  return (left->__detachstate == right->__detachstate
-	  && left->__schedpolicy == right->__schedpolicy
-	  && left->__guardsize == right->__guardsize
-	  && (left->__schedparam.sched_priority
-	      == right->__schedparam.sched_priority)
-	  && left->__inheritsched == right->__inheritsched
-	  && left->__scope == right->__scope
-	  && left->__stacksize == right->__stacksize
-	  && left->__stackaddr_set == right->__stackaddr_set
-	  && (left->__stackaddr_set
-	      || left->__stackaddr == right->__stackaddr));
-}
-
-
-/* Search the list of active threads and find one which has matching
-   attributes.  Global mutex lock must be held by caller.  */
-struct thread_node *
-__timer_thread_find_matching (const pthread_attr_t *desired_attr,
-			      clockid_t desired_clock_id)
-{
-  struct list_links *iter = list_first (&thread_active_list);
-
-  while (iter != list_null (&thread_active_list))
-    {
-      struct thread_node *candidate = thread_links2ptr (iter);
-
-      if (thread_attr_compare (desired_attr, &candidate->attr)
-	  && desired_clock_id == candidate->clock_id)
-	return candidate;
-
-      iter = list_next (iter);
-    }
-
-  return NULL;
-}
-
-
-/* Grab a free timer structure from the global free list.  The global
-   lock must be held by the caller.  */
-struct timer_node *
-__timer_alloc (void)
-{
-  struct list_links *node = list_first (&timer_free_list);
-
-  if (node != list_null (&timer_free_list))
-    {
-      struct timer_node *timer = timer_links2ptr (node);
-      list_unlink_ip (node);
-      timer->inuse = TIMER_INUSE;
-      timer->refcount = 1;
-      return timer;
-    }
-
-  return NULL;
-}
-
-
-/* Return a timer structure to the global free list.  The global lock
-   must be held by the caller.  */
-void
-__timer_dealloc (struct timer_node *timer)
-{
-  assert (timer->refcount == 0);
-  timer->thread = NULL;	/* Break association between timer and thread.  */
-  timer->inuse = TIMER_FREE;
-  list_append (&timer_free_list, &timer->links);
-}
-
-
-/* Thread cancellation handler which unlocks a mutex.  */
-void
-__timer_mutex_cancel_handler (void *arg)
-{
-  pthread_mutex_unlock (arg);
-}