Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 166 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/pthread/timer_create.c b/REORG.TODO/sysdeps/pthread/timer_create.c
new file mode 100644
index 0000000000..ddc48450a9
--- /dev/null
+++ b/REORG.TODO/sysdeps/pthread/timer_create.c
@@ -0,0 +1,166 @@
+/* Copyright (C) 2000-2017 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, see <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <signal.h>
+#include <pthread.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "posix-timer.h"
+
+
+/* Create new per-process timer using CLOCK.  */
+int
+timer_create (clockid_t clock_id, struct sigevent *evp, timer_t *timerid)
+{
+  int retval = -1;
+  struct timer_node *newtimer = NULL;
+  struct thread_node *thread = NULL;
+
+  if (0
+#if defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
+      || clock_id == CLOCK_PROCESS_CPUTIME_ID
+#endif
+#if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0
+      || clock_id == CLOCK_THREAD_CPUTIME_ID
+#endif
+      )
+    {
+      /* We don't allow timers for CPU clocks.  At least not in the
+	 moment.  */
+      __set_errno (ENOTSUP);
+      return -1;
+    }
+
+  if (clock_id != CLOCK_REALTIME)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  pthread_once (&__timer_init_once_control, __timer_init_once);
+
+  if (__timer_init_failed)
+    {
+      __set_errno (ENOMEM);
+      return -1;
+    }
+
+  pthread_mutex_lock (&__timer_mutex);
+
+  newtimer = __timer_alloc ();
+  if (__glibc_unlikely (newtimer == NULL))
+    {
+      __set_errno (EAGAIN);
+      goto unlock_bail;
+    }
+
+  if (evp != NULL)
+    newtimer->event = *evp;
+  else
+    {
+      newtimer->event.sigev_notify = SIGEV_SIGNAL;
+      newtimer->event.sigev_signo = SIGALRM;
+      newtimer->event.sigev_value.sival_ptr = timer_ptr2id (newtimer);
+      newtimer->event.sigev_notify_function = 0;
+    }
+
+  newtimer->event.sigev_notify_attributes = &newtimer->attr;
+  newtimer->creator_pid = getpid ();
+
+  switch (__builtin_expect (newtimer->event.sigev_notify, SIGEV_SIGNAL))
+    {
+    case SIGEV_NONE:
+    case SIGEV_SIGNAL:
+      /* We have a global thread for delivering timed signals.
+	 If it is not running, try to start it up.  */
+      thread = &__timer_signal_thread_rclk;
+      if (! thread->exists)
+	{
+	  if (__builtin_expect (__timer_thread_start (thread),
+				1) < 0)
+	    {
+	      __set_errno (EAGAIN);
+	      goto unlock_bail;
+            }
+        }
+      break;
+
+    case SIGEV_THREAD:
+      /* Copy over thread attributes or set up default ones.  */
+      if (evp->sigev_notify_attributes)
+	newtimer->attr = *(pthread_attr_t *) evp->sigev_notify_attributes;
+      else
+	pthread_attr_init (&newtimer->attr);
+
+      /* Ensure thread attributes call for deatched thread.  */
+      pthread_attr_setdetachstate (&newtimer->attr, PTHREAD_CREATE_DETACHED);
+
+      /* Try to find existing thread having the right attributes.  */
+      thread = __timer_thread_find_matching (&newtimer->attr, clock_id);
+
+      /* If no existing thread has these attributes, try to allocate one.  */
+      if (thread == NULL)
+	thread = __timer_thread_alloc (&newtimer->attr, clock_id);
+
+      /* Out of luck; no threads are available.  */
+      if (__glibc_unlikely (thread == NULL))
+	{
+	  __set_errno (EAGAIN);
+	  goto unlock_bail;
+	}
+
+      /* If the thread is not running already, try to start it.  */
+      if (! thread->exists
+	  && __builtin_expect (! __timer_thread_start (thread), 0))
+	{
+	  __set_errno (EAGAIN);
+	  goto unlock_bail;
+	}
+      break;
+
+    default:
+      __set_errno (EINVAL);
+      goto unlock_bail;
+    }
+
+  newtimer->clock = clock_id;
+  newtimer->abstime = 0;
+  newtimer->armed = 0;
+  newtimer->thread = thread;
+
+  *timerid = timer_ptr2id (newtimer);
+  retval = 0;
+
+  if (__builtin_expect (retval, 0) == -1)
+    {
+    unlock_bail:
+      if (thread != NULL)
+	__timer_thread_dealloc (thread);
+      if (newtimer != NULL)
+	{
+	  timer_delref (newtimer);
+	  __timer_dealloc (newtimer);
+	}
+    }
+
+  pthread_mutex_unlock (&__timer_mutex);
+
+  return retval;
+}