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2.5-18.1

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This commit is contained in:
Jakub Jelinek
2007-07-12 18:26:36 +00:00
parent 7d58530341
commit 0ecb606cb6
6215 changed files with 494638 additions and 305010 deletions
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107
sysdeps/pthread/lio_listio.c
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@ -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);