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Diffstat (limited to 'rtkaio/sysdeps/unix/sysv/linux/klio_listio.c')
-rw-r--r--rtkaio/sysdeps/unix/sysv/linux/klio_listio.c322
1 files changed, 0 insertions, 322 deletions
diff --git a/rtkaio/sysdeps/unix/sysv/linux/klio_listio.c b/rtkaio/sysdeps/unix/sysv/linux/klio_listio.c
deleted file mode 100644
index b7676c9f03..0000000000
--- a/rtkaio/sysdeps/unix/sysv/linux/klio_listio.c
+++ /dev/null
@@ -1,322 +0,0 @@
-/* Enqueue and list of read or write requests.
- Copyright (C) 1997,1998,1999,2000,2001,2002,2003,2005,2006
- 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 Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#include <kaio_misc.h>
-
-#ifndef USE_KAIO
-#include <lio_listio.c>
-#else
-
-#ifndef lio_listio
-#include <aio.h>
-#include <assert.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#define LIO_OPCODE_BASE 0
-#endif
-
-#include <shlib-compat.h>
-
-
-/* We need this special structure to handle asynchronous I/O. */
-struct async_waitlist
- {
- int counter;
- struct sigevent sigev;
- struct waitlist list[0];
- };
-
-
-/* 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];
- int cnt;
- volatile int total = 0;
- int result = 0, op = 0;
- kctx_t kctx = KCTX_NONE;
-
- if (sig == NULL)
- {
- defsigev.sigev_notify = SIGEV_NONE;
- sig = &defsigev;
- }
-
- /* Request the mutex. */
- pthread_mutex_lock (&__aio_requests_mutex);
-
- if (LIO_MODE (mode) == LIO_WAIT && ! __have_no_kernel_aio && nent > 0)
- {
- int res;
- INTERNAL_SYSCALL_DECL (err);
-
- kctx = 0;
- do
- res = INTERNAL_SYSCALL (io_setup, err, 2, nent, &kctx);
- while (INTERNAL_SYSCALL_ERROR_P (res, err)
- && INTERNAL_SYSCALL_ERRNO (res, err) == EINTR);
- if (INTERNAL_SYSCALL_ERROR_P (res, err))
- {
- kctx = KCTX_NONE;
- if (INTERNAL_SYSCALL_ERRNO (res, err) == ENOSYS)
- __have_no_kernel_aio = 1;
- }
- }
- else if (LIO_MODE (mode) == LIO_NOWAIT)
- {
- op = LIO_KTHREAD;
- if (sig->sigev_notify != SIGEV_NONE)
- op = LIO_KTHREAD | LIO_KTHREAD_REQUIRED;
- }
- op |= LIO_OPCODE_BASE;
-
- /* 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)
- {
- if (NO_INDIVIDUAL_EVENT_P (mode))
- list[cnt]->aio_sigevent.sigev_notify = SIGEV_NONE;
- requests[cnt]
- = __aio_enqueue_request_ctx ((aiocb_union *) list[cnt],
- list[cnt]->aio_lio_opcode | op,
- kctx);
-
- 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. */
-
- if (kctx != KCTX_NONE)
- {
- INTERNAL_SYSCALL_DECL (err);
- INTERNAL_SYSCALL (io_destroy, err, 1, kctx);
- }
-
- /* 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 (LIO_MODE (mode) == LIO_NOWAIT)
- {
-#ifdef BROKEN_THREAD_SIGNALS
- __aio_notify_only (sig,
- sig->sigev_notify == SIGEV_SIGNAL ? getpid () : 0);
-#else
- __aio_notify_only (sig);
-#endif
- }
-
- return result;
- }
- else if (LIO_MODE (mode) == LIO_WAIT)
- {
-#ifndef DONT_NEED_AIO_MISC_COND
- pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
- int oldstate;
-#endif
- struct waitlist waitlist[nent];
- volatile int ktotal = 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)
- {
- if (requests[cnt]->kioctx != KCTX_NONE)
- {
- assert (requests[cnt]->kioctx == kctx);
- waitlist[cnt].counterp = &ktotal;
- ++ktotal;
- }
- else
- {
- waitlist[cnt].counterp = &total;
- ++total;
- }
-#ifndef DONT_NEED_AIO_MISC_COND
- waitlist[cnt].cond = &cond;
-#endif
- waitlist[cnt].result = &result;
- waitlist[cnt].next = requests[cnt]->waiting;
- waitlist[cnt].sigevp = NULL;
-#ifdef BROKEN_THREAD_SIGNALS
- waitlist[cnt].caller_pid = 0; /* Not needed. */
-#endif
- requests[cnt]->waiting = &waitlist[cnt];
- }
- }
-
- while (ktotal > 0)
- __aio_wait_for_events (kctx, NULL);
-#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 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 cancellation state. */
- pthread_setcancelstate (oldstate, NULL);
-
- /* Release the conditional variable. */
- if (pthread_cond_destroy (&cond) != 0)
- /* This must never happen. */
- abort ();
-#endif
-
- if (kctx != KCTX_NONE)
- {
- INTERNAL_SYSCALL_DECL (err);
- INTERNAL_SYSCALL (io_destroy, err, 1, kctx);
- }
-
- /* 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 if (sig->sigev_notify != SIGEV_NONE)
- {
- 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
- {
-#ifdef BROKEN_THREAD_SIGNALS
- pid_t caller_pid = sig->sigev_notify == SIGEV_SIGNAL ? getpid () : 0;
-#endif
- 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)
- {
-#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;
-#ifdef BROKEN_THREAD_SIGNALS
- waitlist->list[cnt].caller_pid = caller_pid;
-#endif
- requests[cnt]->waiting = &waitlist->list[cnt];
- ++total;
- }
- }
-
- waitlist->counter = total;
- waitlist->sigev = *sig;
- }
- }
-
- /* Release the mutex. */
- pthread_mutex_unlock (&__aio_requests_mutex);
-
- 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);
-
-#endif
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