2001-06-15 Roland McGrath <roland@frob.com>

	* rt/Makefile (aio-routines, clock-routines, timer-routines): New
	variables, broken out of librt-routines.
	(librt-routines): Set using those.
	(extra-libs, extra-libc-others, tests): Set these unconditionally.
	(distribute): No need for $(librt-map) or $(librt-routines:=.c) here.
	* sysdeps/generic/aio_fsync.c: New file.
	* sysdeps/generic/aio_misc.c: New file.
	* sysdeps/generic/aio_write.c: New file.
	* sysdeps/generic/aio_write64.c: New file.
	* sysdeps/generic/aio_read64.c: New file.
	* sysdeps/generic/aio_read.c: New file.
	* sysdeps/generic/aio_notify.c: New file.
	* sysdeps/generic/lio_listio64.c: New file.
	* sysdeps/generic/lio_listio.c: New file.
	* sysdeps/generic/aio_cancel.c: New file.
	* sysdeps/generic/aio_misc.h: New file.
	* sysdeps/generic/aio_suspend.c: New file.
	* rt/aio_cancel.c: Moved to ...
	* sysdeps/pthread/aio_cancel.c: ... here.
	* rt/aio_fsync.c: Moved to ...
	* sysdeps/pthread/aio_fsync.c: ... here.
	* rt/aio_misc.c: Moved to ...
	* sysdeps/pthread/aio_misc.c: ... here.
	* rt/aio_misc.h: Moved to ...
	* sysdeps/pthread/aio_misc.h: ... here.
	* rt/aio_notify.c: Moved to ...
	* sysdeps/pthread/aio_notify.c: ... here.
	* rt/aio_read.c: Moved to ...
	* sysdeps/pthread/aio_read.c: ... here.
	* rt/aio_read64.c: Moved to ...
	* sysdeps/pthread/aio_read64.c: ... here.
	* rt/aio_suspend.c: Moved to ...
	* sysdeps/pthread/aio_suspend.c: ... here.
	* rt/aio_write.c: Moved to ...
	* sysdeps/pthread/aio_write.c: ... here.
	* rt/aio_write64.c: Moved to ...
	* sysdeps/pthread/aio_write64.c: ... here.
	* rt/lio_listio.c: Moved to ...
	* sysdeps/pthread/lio_listio.c: ... here.
	* rt/lio_listio64.c: Moved to ...
	* sysdeps/pthread/lio_listio64.c: ... here.

1 files changed, 187 insertions, 0 deletions

diff --git a/sysdeps/pthread/lio_listio.c b/sysdeps/pthread/lio_listio.c
new file mode 100644
index 0000000000..e1df603fd8
--- /dev/null
+++ b/sysdeps/pthread/lio_listio.c
@@ -0,0 +1,187 @@
+/* Enqueue and list of read or write requests.
+   Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <aio.h>
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "aio_misc.h"
+
+
+/* We need this special structure to handle asynchronous I/O.  */
+struct async_waitlist
+  {
+    int counter;
+    struct sigevent sigev;
+    struct waitlist list[0];
+  };
+
+
+int
+lio_listio (mode, list, nent, sig)
+     int mode;
+     struct aiocb *const list[];
+     int nent;
+     struct sigevent *sig;
+{
+  struct sigevent defsigev;
+  struct requestlist *requests[nent];
+  int cnt;
+  volatile int total = 0;
+  int result = 0;
+
+  /* Check arguments.  */
+  if (mode != LIO_WAIT && mode != LIO_NOWAIT)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  if (sig == NULL)
+    {
+      defsigev.sigev_notify = SIGEV_NONE;
+      sig = &defsigev;
+    }
+
+  /* Request the mutex.  */
+  pthread_mutex_lock (&__aio_requests_mutex);
+
+  /* Now we can enqueue all requests.  Since we already acquired the
+     mutex the enqueue function need not do this.  */
+  for (cnt = 0; cnt < nent; ++cnt)
+    if (list[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP)
+      {
+	list[cnt]->aio_sigevent.sigev_notify = SIGEV_NONE;
+	requests[cnt] = __aio_enqueue_request ((aiocb_union *) list[cnt],
+					       list[cnt]->aio_lio_opcode);
+
+	if (requests[cnt] != NULL)
+	  /* Successfully enqueued.  */
+	  ++total;
+	else
+	  /* Signal that we've seen an error.  `errno' and the error code
+	     of the aiocb will tell more.  */
+	  result = -1;
+      }
+    else
+      requests[cnt] = NULL;
+
+  if (total == 0)
+    {
+      /* We don't have anything to do except signalling if we work
+	 asynchronously.  */
+
+      /* Release the mutex.  We do this before raising a signal since the
+	 signal handler might do a `siglongjmp' and then the mutex is
+	 locked forever.  */
+      pthread_mutex_unlock (&__aio_requests_mutex);
+
+      if (mode == LIO_NOWAIT)
+	__aio_notify_only (sig,
+			   sig->sigev_notify == SIGEV_SIGNAL ? getpid () : 0);
+
+      return result;
+    }
+  else if (mode == LIO_WAIT)
+    {
+      pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
+      struct waitlist waitlist[nent];
+      int oldstate;
+
+      total = 0;
+      for (cnt = 0; cnt < nent; ++cnt)
+	{
+	  assert (requests[cnt] == NULL || list[cnt] != NULL);
+
+	  if (requests[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP)
+	    {
+	      waitlist[cnt].cond = &cond;
+	      waitlist[cnt].next = requests[cnt]->waiting;
+	      waitlist[cnt].counterp = &total;
+	      waitlist[cnt].sigevp = NULL;
+	      waitlist[cnt].caller_pid = 0;	/* Not needed.  */
+	      requests[cnt]->waiting = &waitlist[cnt];
+	      ++total;
+	    }
+	}
+
+      /* Since `pthread_cond_wait'/`pthread_cond_timedwait' are cancelation
+	 points we must be careful.  We added entries to the waiting lists
+	 which we must remove.  So defer cancelation for now.  */
+      pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &oldstate);
+
+      while (total > 0)
+	pthread_cond_wait (&cond, &__aio_requests_mutex);
+
+      /* Now it's time to restore the cancelation state.  */
+      pthread_setcancelstate (oldstate, NULL);
+
+      /* Release the conditional variable.  */
+      if (pthread_cond_destroy (&cond) != 0)
+	/* This must never happen.  */
+	abort ();
+    }
+  else
+    {
+      struct async_waitlist *waitlist;
+
+      waitlist = (struct async_waitlist *)
+	malloc (sizeof (struct async_waitlist)
+		+ (nent * sizeof (struct waitlist)));
+
+      if (waitlist == NULL)
+	{
+	  __set_errno (EAGAIN);
+	  result = -1;
+	}
+      else
+	{
+	  pid_t caller_pid = sig->sigev_notify == SIGEV_SIGNAL ? getpid () : 0;
+	  total = 0;
+
+	  for (cnt = 0; cnt < nent; ++cnt)
+	    {
+	      assert (requests[cnt] == NULL || list[cnt] != NULL);
+
+	      if (requests[cnt] != NULL
+		  && list[cnt]->aio_lio_opcode != LIO_NOP)
+		{
+		  waitlist->list[cnt].cond = NULL;
+		  waitlist->list[cnt].next = requests[cnt]->waiting;
+		  waitlist->list[cnt].counterp = &waitlist->counter;
+		  waitlist->list[cnt].sigevp = &waitlist->sigev;
+		  waitlist->list[cnt].caller_pid = caller_pid;
+		  requests[cnt]->waiting = &waitlist->list[cnt];
+		  ++total;
+		}
+	    }
+
+	  waitlist->counter = total;
+	  waitlist->sigev = *sig;
+	}
+    }
+
+  /* Release the mutex.  */
+  pthread_mutex_unlock (&__aio_requests_mutex);
+
+  return result;
+}