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-rw-r--r--linuxthreads/sysdeps/pthread/posix-timer.h168
1 files changed, 168 insertions, 0 deletions
diff --git a/linuxthreads/sysdeps/pthread/posix-timer.h b/linuxthreads/sysdeps/pthread/posix-timer.h
new file mode 100644
index 0000000000..fcb61aa733
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+++ b/linuxthreads/sysdeps/pthread/posix-timer.h
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+/* Definitions for POSIX timer implementation on top of LinuxThreads.
+ Copyright (C) 2000 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library 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;
+};
+
+
+/* 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;
+ unsigned int inuse;
+ struct thread_node *thread;
+};
+
+
+/* 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;
+
+/* Node for the thread used to deliver signals. */
+extern struct thread_node __timer_signal_thread;
+
+
+/* Return pointer to timer structure corresponding to ID. */
+static inline struct timer_node *
+timer_id2ptr (timer_t timerid)
+{
+ if (timerid >= 0 && timerid < TIMER_MAX && __timer_array[timerid].inuse)
+ return &__timer_array[timerid];
+
+ return NULL;
+}
+
+/* Return ID of TIMER. */
+static inline int
+timer_ptr2id (struct timer_node *timer)
+{
+ return __timer_array - 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 (struct list_links *list)
+{
+ list->next->prev = list->prev;
+ list->prev->next = list->next;
+ 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);
+extern struct thread_node *__timer_thread_alloc (const pthread_attr_t *desired_attr);
+extern void __timer_dealloc (struct timer_node *timer);
+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);