initial import of latest linuxthreads

1 files changed, 204 insertions, 0 deletions

diff --git a/libpthread/linuxthreads/sysdeps/pthread/posix-timer.h b/libpthread/linuxthreads/sysdeps/pthread/posix-timer.h
new file mode 100644
index 000000000..1b0a2b65e
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/pthread/posix-timer.h
@@ -0,0 +1,204 @@
+/* Definitions for POSIX timer implementation on top of LinuxThreads.
+   Copyright (C) 2000, 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 <limits.h>
+#include <signal.h>
+
+/* Double linked list.  */
+struct list_links
+{
+  struct list_links *next;
+  struct list_links *prev;
+};
+
+
+/* Forward declaration.  */
+struct timer_node;
+
+
+/* Definitions for an internal thread of the POSIX timer implementation.  */
+struct thread_node
+{
+  struct list_links links;
+  pthread_attr_t attr;
+  pthread_t id;
+  unsigned int exists;
+  struct list_links timer_queue;
+  pthread_cond_t cond;
+  struct timer_node *current_timer;
+  pthread_t captured;
+  clockid_t clock_id;
+};
+
+
+/* Internal representation of a timer.  */
+struct timer_node
+{
+  struct list_links links;
+  struct sigevent event;
+  clockid_t clock;
+  struct itimerspec value;
+  struct timespec expirytime;
+  pthread_attr_t attr;
+  unsigned int abstime;
+  unsigned int armed;
+  enum {
+    TIMER_FREE, TIMER_INUSE, TIMER_DELETED
+  } inuse;
+  struct thread_node *thread;
+  pid_t creator_pid;
+  int refcount;
+  int overrun_count;
+};
+
+
+/* Static array with the structures for all the timers.  */
+extern struct timer_node __timer_array[TIMER_MAX];
+
+/* Global lock to protect operation on the lists.  */
+extern pthread_mutex_t __timer_mutex;
+
+/* Variable to protext initialization.  */
+extern pthread_once_t __timer_init_once_control;
+
+/* Nonzero if initialization of timer implementation failed.  */
+extern int __timer_init_failed;
+
+/* Nodes for the threads used to deliver signals.  */
+/* A distinct thread is used for each clock type.  */
+
+extern struct thread_node __timer_signal_thread_rclk;
+
+
+/* Return pointer to timer structure corresponding to ID.  */
+static inline struct timer_node *
+timer_id2ptr (timer_t timerid)
+{
+  if (timerid >= 0 && timerid < TIMER_MAX)
+    return &__timer_array[timerid];
+
+  return NULL;
+}
+
+/* Return ID of TIMER.  */
+static inline int
+timer_ptr2id (struct timer_node *timer)
+{
+  return timer - __timer_array;
+}
+
+/* Check whether timer is valid; global mutex must be held. */
+static inline int
+timer_valid (struct timer_node *timer)
+{
+  return timer && timer->inuse == TIMER_INUSE;
+}
+
+/* Timer refcount functions; need global mutex. */
+extern void __timer_dealloc (struct timer_node *timer);
+
+static inline void
+timer_addref (struct timer_node *timer)
+{
+  timer->refcount++;
+}
+
+static inline void
+timer_delref (struct timer_node *timer)
+{
+  if (--timer->refcount == 0)
+    __timer_dealloc (timer);
+}
+
+/* Timespec helper routines.  */
+static inline int
+timespec_compare (const struct timespec *left, const struct timespec *right)
+{
+  if (left->tv_sec < right->tv_sec)
+    return -1;
+  if (left->tv_sec > right->tv_sec)
+    return 1;
+
+  if (left->tv_nsec < right->tv_nsec)
+    return -1;
+  if (left->tv_nsec > right->tv_nsec)
+    return 1;
+
+  return 0;
+}
+
+static inline void
+timespec_add (struct timespec *sum, const struct timespec *left,
+	      const struct timespec *right)
+{
+  sum->tv_sec = left->tv_sec + right->tv_sec;
+  sum->tv_nsec = left->tv_nsec + right->tv_nsec;
+
+  if (sum->tv_nsec >= 1000000000)
+    {
+      ++sum->tv_sec;
+      sum->tv_nsec -= 1000000000;
+    }
+}
+
+static inline void
+timespec_sub (struct timespec *diff, const struct timespec *left,
+	      const struct timespec *right)
+{
+  diff->tv_sec = left->tv_sec - right->tv_sec;
+  diff->tv_nsec = left->tv_nsec - right->tv_nsec;
+
+  if (diff->tv_nsec < 0)
+    {
+      --diff->tv_sec;
+      diff->tv_nsec += 1000000000;
+    }
+}
+
+
+/* We need one of the list functions in the other modules.  */
+static inline void
+list_unlink_ip (struct list_links *list)
+{
+  struct list_links *lnext = list->next, *lprev = list->prev;
+
+  lnext->prev = lprev;
+  lprev->next = lnext;
+
+  /* The suffix ip means idempotent; list_unlink_ip can be called
+   * two or more times on the same node.
+   */
+
+  list->next = list;
+  list->prev = list;
+}
+
+
+/* Functions in the helper file.  */
+extern void __timer_mutex_cancel_handler (void *arg);
+extern void __timer_init_once (void);
+extern struct timer_node *__timer_alloc (void);
+extern int __timer_thread_start (struct thread_node *thread);
+extern struct thread_node *__timer_thread_find_matching (const pthread_attr_t *desired_attr, clockid_t);
+extern struct thread_node *__timer_thread_alloc (const pthread_attr_t *desired_attr, clockid_t);
+extern void __timer_thread_dealloc (struct thread_node *thread);
+extern int __timer_thread_queue_timer (struct thread_node *thread,
+				       struct timer_node *insert);
+extern void __timer_thread_wakeup (struct thread_node *thread);