Get rid of nptl/sysdeps/ entirely!

1 files changed, 179 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/timer_create.c b/sysdeps/unix/sysv/linux/timer_create.c
new file mode 100644
index 0000000000..e5c056bf2c
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/timer_create.c
@@ -0,0 +1,179 @@
+/* Copyright (C) 2003-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+   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 <pthread.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <sysdep.h>
+#include <internaltypes.h>
+#include <nptl/pthreadP.h>
+#include "kernel-posix-timers.h"
+#include "kernel-posix-cpu-timers.h"
+
+
+#ifdef timer_create_alias
+# define timer_create timer_create_alias
+#endif
+
+
+int
+timer_create (clock_id, evp, timerid)
+     clockid_t clock_id;
+     struct sigevent *evp;
+     timer_t *timerid;
+{
+#undef timer_create
+  {
+    clockid_t syscall_clockid = (clock_id == CLOCK_PROCESS_CPUTIME_ID
+				 ? MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED)
+				 : clock_id == CLOCK_THREAD_CPUTIME_ID
+				 ? MAKE_THREAD_CPUCLOCK (0, CPUCLOCK_SCHED)
+				 : clock_id);
+
+    /* If the user wants notification via a thread we need to handle
+       this special.  */
+    if (evp == NULL
+	|| __builtin_expect (evp->sigev_notify != SIGEV_THREAD, 1))
+      {
+	struct sigevent local_evp;
+
+	/* We avoid allocating too much memory by basically
+	   using struct timer as a derived class with the
+	   first two elements being in the superclass.  We only
+	   need these two elements here.  */
+	struct timer *newp = (struct timer *) malloc (offsetof (struct timer,
+								thrfunc));
+	if (newp == NULL)
+	  /* No more memory.  */
+	  return -1;
+
+	if (evp == NULL)
+	  {
+	    /* The kernel has to pass up the timer ID which is a
+	       userlevel object.  Therefore we cannot leave it up to
+	       the kernel to determine it.  */
+	    local_evp.sigev_notify = SIGEV_SIGNAL;
+	    local_evp.sigev_signo = SIGALRM;
+	    local_evp.sigev_value.sival_ptr = newp;
+
+	    evp = &local_evp;
+	  }
+
+	kernel_timer_t ktimerid;
+	int retval = INLINE_SYSCALL (timer_create, 3, syscall_clockid, evp,
+				     &ktimerid);
+
+	if (retval != -1)
+	  {
+	    newp->sigev_notify = (evp != NULL
+				  ? evp->sigev_notify : SIGEV_SIGNAL);
+	    newp->ktimerid = ktimerid;
+
+	    *timerid = (timer_t) newp;
+	  }
+	else
+	  {
+	    /* Cannot allocate the timer, fail.  */
+	    free (newp);
+	    retval = -1;
+	  }
+
+	return retval;
+      }
+    else
+      {
+	/* Create the helper thread.  */
+	pthread_once (&__helper_once, __start_helper_thread);
+	if (__helper_tid == 0)
+	  {
+	    /* No resources to start the helper thread.  */
+	    __set_errno (EAGAIN);
+	    return -1;
+	  }
+
+	struct timer *newp;
+	newp = (struct timer *) malloc (sizeof (struct timer));
+	if (newp == NULL)
+	  return -1;
+
+	/* Copy the thread parameters the user provided.  */
+	newp->sival = evp->sigev_value;
+	newp->thrfunc = evp->sigev_notify_function;
+	newp->sigev_notify = SIGEV_THREAD;
+
+	/* We cannot simply copy the thread attributes since the
+	   implementation might keep internal information for
+	   each instance.  */
+	(void) pthread_attr_init (&newp->attr);
+	if (evp->sigev_notify_attributes != NULL)
+	  {
+	    struct pthread_attr *nattr;
+	    struct pthread_attr *oattr;
+
+	    nattr = (struct pthread_attr *) &newp->attr;
+	    oattr = (struct pthread_attr *) evp->sigev_notify_attributes;
+
+	    nattr->schedparam = oattr->schedparam;
+	    nattr->schedpolicy = oattr->schedpolicy;
+	    nattr->flags = oattr->flags;
+	    nattr->guardsize = oattr->guardsize;
+	    nattr->stackaddr = oattr->stackaddr;
+	    nattr->stacksize = oattr->stacksize;
+	  }
+
+	/* In any case set the detach flag.  */
+	(void) pthread_attr_setdetachstate (&newp->attr,
+					    PTHREAD_CREATE_DETACHED);
+
+	/* Create the event structure for the kernel timer.  */
+	struct sigevent sev =
+	  { .sigev_value.sival_ptr = newp,
+	    .sigev_signo = SIGTIMER,
+	    .sigev_notify = SIGEV_SIGNAL | SIGEV_THREAD_ID,
+	    ._sigev_un = { ._pad = { [0] = __helper_tid } } };
+
+	/* Create the timer.  */
+	INTERNAL_SYSCALL_DECL (err);
+	int res;
+	res = INTERNAL_SYSCALL (timer_create, err, 3,
+				syscall_clockid, &sev, &newp->ktimerid);
+	if (! INTERNAL_SYSCALL_ERROR_P (res, err))
+	  {
+	    /* Add to the queue of active timers with thread
+	       delivery.  */
+	    pthread_mutex_lock (&__active_timer_sigev_thread_lock);
+	    newp->next = __active_timer_sigev_thread;
+	    __active_timer_sigev_thread = newp;
+	    pthread_mutex_unlock (&__active_timer_sigev_thread_lock);
+
+	    *timerid = (timer_t) newp;
+	    return 0;
+	  }
+
+	/* Free the resources.  */
+	free (newp);
+
+	__set_errno (INTERNAL_SYSCALL_ERRNO (res, err));
+
+	return -1;
+      }
+  }
+}