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lio_listio should emit an event for each individual request in

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addition to the global event.
	* sysdeps/pthread/lio_listio.c (lio_listio): Renamed to
	lio_listio_internal.  Remove mode parameter check.  Only set sigevent
	type ti SIGEV_NONE if LIO_NO_INDIVIDUAL_EVENT is set.
	(__lio_listio_21): New function.  Compatiblity version which sets
	LIO_NO_INDIVIDUAL_EVENT before calling lio_listio_internal.
	(__lio_listio_item_notify): New function.
	* sysdeps/pthread/lio_listio64.c: Define __lio_listio_21 and
	__lio_listio_item_notify macros.
	* sysdeps/pthread/Versions: New file.
	* rt/tst-aio2.c: Adjust test for new semantics of lio_listio.
	* include/aio.h: Define LIO_NO_INDIVIDUAL_EVENT.
	* Versions.def: Add GLIBC_2.4 for librt.

	* rt/Versions: Whitespace fix.
	* sysdeps/pthread/aio_misc.c: Likewise.
This commit is contained in:
Ulrich Drepper
2006-01-03 23:19:03 +00:00
parent 1c50f6b660
commit 6d3aff23e2
9 changed files with 117 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

77
sysdeps/pthread/lio_listio.c
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@ -1,5 +1,5 @@
/* Enqueue and list of read or write requests.
Copyright (C) 1997,1998,1999,2000,2001,2003,2005
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.
@ -31,6 +31,9 @@
#define LIO_OPCODE_BASE 0
#endif
#include <shlib-compat.h>
/* We need this special structure to handle asynchronous I/O. */
struct async_waitlist
{
@ -40,12 +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];
@ -53,13 +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;
@ -74,7 +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));
@ -100,7 +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,
@ -112,7 +120,7 @@ lio_listio (mode, list, nent, sig)
return result;
}
else if (mode == LIO_WAIT)
else if (LIO_MODE (mode) == LIO_WAIT)
{
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
struct waitlist waitlist[nent];
@ -202,3 +210,38 @@ 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);