2.5-18.1

1 files changed, 85 insertions, 22 deletions

diff --git a/sysdeps/pthread/lio_listio.c b/sysdeps/pthread/lio_listio.c
index 5b98837b0d..c652404ae2 100644
--- a/sysdeps/pthread/lio_listio.c
+++ b/sysdeps/pthread/lio_listio.c
@@ -1,5 +1,6 @@
 /* Enqueue and list of read or write requests.
-   Copyright (C) 1997,1998,1999,2000,2001,2003 Free Software Foundation, Inc.
+   Copyright (C) 1997,1998,1999,2000,2001,2003,2005,2006
+	Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -25,11 +26,14 @@
 #include <stdlib.h>
 #include <unistd.h>
 
-#include "aio_misc.h"
+#include <aio_misc.h>
 
 #define LIO_OPCODE_BASE 0
 #endif
 
+#include <shlib-compat.h>
+
+
 /* We need this special structure to handle asynchronous I/O.  */
 struct async_waitlist
   {
@@ -39,12 +43,22 @@ struct async_waitlist
   };
 
 
-int
-lio_listio (mode, list, nent, sig)
-     int mode;
-     struct aiocb *const list[];
-     int nent;
-     struct sigevent *sig;
+/* The code in glibc 2.1 to glibc 2.4 issued only one event when all
+   requests submitted with lio_listio finished.  The existing practice
+   is to issue events for the individual requests as well.  This is
+   what the new code does.  */
+#if SHLIB_COMPAT (librt, GLIBC_2_1, GLIBC_2_4)
+# define LIO_MODE(mode) ((mode) & 127)
+# define NO_INDIVIDUAL_EVENT_P(mode) ((mode) & 128)
+#else
+# define LIO_MODE(mode) mode
+# define NO_INDIVIDUAL_EVENT_P(mode) 0
+#endif
+
+
+static int
+lio_listio_internal (int mode, struct aiocb *const list[], int nent,
+		     struct sigevent *sig)
 {
   struct sigevent defsigev;
   struct requestlist *requests[nent];
@@ -52,13 +66,6 @@ lio_listio (mode, list, nent, sig)
   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;
@@ -73,7 +80,9 @@ lio_listio (mode, list, nent, sig)
   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;
+	if (NO_INDIVIDUAL_EVENT_P (mode))
+	  list[cnt]->aio_sigevent.sigev_notify = SIGEV_NONE;
+
 	requests[cnt] = __aio_enqueue_request ((aiocb_union *) list[cnt],
 					       (list[cnt]->aio_lio_opcode
 					        | LIO_OPCODE_BASE));
@@ -99,7 +108,7 @@ lio_listio (mode, list, nent, sig)
 	 locked forever.  */
       pthread_mutex_unlock (&__aio_requests_mutex);
 
-      if (mode == LIO_NOWAIT)
+      if (LIO_MODE (mode) == LIO_NOWAIT)
 	{
 #ifdef BROKEN_THREAD_SIGNALS
 	__aio_notify_only (sig,
@@ -111,11 +120,13 @@ lio_listio (mode, list, nent, sig)
 
       return result;
     }
-  else if (mode == LIO_WAIT)
+  else if (LIO_MODE (mode) == LIO_WAIT)
     {
+#ifndef DONT_NEED_AIO_MISC_COND
       pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
-      struct waitlist waitlist[nent];
       int oldstate;
+#endif
+      struct waitlist waitlist[nent];
 
       total = 0;
       for (cnt = 0; cnt < nent; ++cnt)
@@ -124,7 +135,10 @@ lio_listio (mode, list, nent, sig)
 
 	  if (requests[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP)
 	    {
+#ifndef DONT_NEED_AIO_MISC_COND
 	      waitlist[cnt].cond = &cond;
+#endif
+	      waitlist[cnt].result = &result;
 	      waitlist[cnt].next = requests[cnt]->waiting;
 	      waitlist[cnt].counterp = &total;
 	      waitlist[cnt].sigevp = NULL;
@@ -136,21 +150,32 @@ lio_listio (mode, list, nent, sig)
 	    }
 	}
 
-      /* Since `pthread_cond_wait'/`pthread_cond_timedwait' are cancelation
+#ifdef DONT_NEED_AIO_MISC_COND
+      AIO_MISC_WAIT (result, total, NULL, 0);
+#else
+      /* Since `pthread_cond_wait'/`pthread_cond_timedwait' are cancellation
 	 points we must be careful.  We added entries to the waiting lists
-	 which we must remove.  So defer cancelation for now.  */
+	 which we must remove.  So defer cancellation 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.  */
+      /* Now it's time to restore the cancellation state.  */
       pthread_setcancelstate (oldstate, NULL);
 
       /* Release the conditional variable.  */
       if (pthread_cond_destroy (&cond) != 0)
 	/* This must never happen.  */
 	abort ();
+#endif
+
+      /* If any of the I/O requests failed, return -1 and set errno.  */
+      if (result != 0)
+	{
+	  __set_errno (result == EINTR ? EINTR : EIO);
+	  result = -1;
+	}
     }
   else
     {
@@ -179,7 +204,10 @@ lio_listio (mode, list, nent, sig)
 	      if (requests[cnt] != NULL
 		  && list[cnt]->aio_lio_opcode != LIO_NOP)
 		{
+#ifndef DONT_NEED_AIO_MISC_COND
 		  waitlist->list[cnt].cond = NULL;
+#endif
+		  waitlist->list[cnt].result = NULL;
 		  waitlist->list[cnt].next = requests[cnt]->waiting;
 		  waitlist->list[cnt].counterp = &waitlist->counter;
 		  waitlist->list[cnt].sigevp = &waitlist->sigev;
@@ -201,3 +229,38 @@ lio_listio (mode, list, nent, sig)
 
   return result;
 }
+
+
+#if SHLIB_COMPAT (librt, GLIBC_2_1, GLIBC_2_4)
+int
+attribute_compat_text_section
+__lio_listio_21 (int mode, struct aiocb *const list[], int nent,
+		 struct sigevent *sig)
+{
+  /* Check arguments.  */
+  if (mode != LIO_WAIT && mode != LIO_NOWAIT)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  return lio_listio_internal (mode | LIO_NO_INDIVIDUAL_EVENT, list, nent, sig);
+}
+compat_symbol (librt, __lio_listio_21, lio_listio, GLIBC_2_1);
+#endif
+
+
+int
+__lio_listio_item_notify (int mode, struct aiocb *const list[], int nent,
+			  struct sigevent *sig)
+{
+    /* Check arguments.  */
+  if (mode != LIO_WAIT && mode != LIO_NOWAIT)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  return lio_listio_internal (mode, list, nent, sig);
+}
+versioned_symbol (librt, __lio_listio_item_notify, lio_listio, GLIBC_2_4);