1 files changed, 97 insertions, 0 deletions
diff --git a/rt/aio_notify.c b/rt/aio_notify.c
new file mode 100644
index 0000000000..be2e1e246b
--- /dev/null
+++ b/rt/aio_notify.c
@@ -0,0 +1,97 @@
+/* Notify initiator of AIO request.
+   Copyright (C) 1997 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 <pthread.h>
+#include <stdlib.h>
+#include "aio_misc.h"
+
+int
+__aio_notify_only (struct sigevent *sigev)
+{
+  int result = 0;
+
+  /* Send the signal to notify about finished processing of the request.  */
+  if (sigev->sigev_notify == SIGEV_THREAD)
+    {
+      /* We have to start a thread.  */
+      pthread_t tid;
+      pthread_attr_t attr, *pattr;
+
+      pattr = (pthread_attr_t *) sigev->sigev_notify_attributes;
+      if (pattr == NULL)
+	{
+	  pthread_attr_init (&attr);
+	  pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
+	  pattr = &attr;
+	}
+
+      if (pthread_create (&tid, pattr,
+			  (void *(*) (void *)) sigev->sigev_notify_function,
+			  sigev->sigev_value.sival_ptr) < 0)
+	result = -1;
+    }
+  else if (sigev->sigev_notify == SIGEV_SIGNAL)
+    /* We have to send a signal.  */
+    if (__aio_sigqueue (sigev->sigev_signo, sigev->sigev_value) < 0)
+      result = -1;
+
+  return result;
+}
+
+
+void
+__aio_notify (struct requestlist *req)
+{
+  struct waitlist *waitlist;
+  struct aiocb *aiocbp = &req->aiocbp->aiocb;
+
+  if (__aio_notify_only (&aiocbp->aio_sigevent) != 0)
+    {
+      /* XXX What shall we do if already an error is set by
+	 read/write/fsync?  */
+      aiocbp->__error_code = errno;
+      aiocbp->__return_value = -1;
+    }
+
+  /* Now also notify possibly waiting threads.  */
+  waitlist = req->waiting;
+  while (waitlist != NULL)
+    {
+      struct waitlist *next = waitlist->next;
+
+      /* Decrement the counter.  This is used in both cases.  */
+      --*waitlist->counterp;
+
+      if (waitlist->sigevp == NULL)
+	pthread_cond_signal (waitlist->cond);
+      else
+	/* This is part of a asynchronous `lio_listio' operation.  If
+	   this request is the last one, send the signal.  */
+	if (*waitlist->counterp == 0)
+	  {
+	    __aio_notify_only (waitlist->sigevp);
+	    /* This is tricky.  See lio_listio.c for the reason why
+	       this works.  */
+	    free ((void *) waitlist->counterp);
+	  }
+
+      waitlist = next;
+    }
+}