From 5ec73bb91f231a0d7a3c54183a9282cafd5511cb Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 16 Jun 2001 04:47:37 +0000 Subject: 2001-06-15 Roland McGrath * rt/Makefile (aio-routines, clock-routines, timer-routines): New variables, broken out of librt-routines. (librt-routines): Set using those. (extra-libs, extra-libc-others, tests): Set these unconditionally. (distribute): No need for $(librt-map) or $(librt-routines:=.c) here. * sysdeps/generic/aio_fsync.c: New file. * sysdeps/generic/aio_misc.c: New file. * sysdeps/generic/aio_write.c: New file. * sysdeps/generic/aio_write64.c: New file. * sysdeps/generic/aio_read64.c: New file. * sysdeps/generic/aio_read.c: New file. * sysdeps/generic/aio_notify.c: New file. * sysdeps/generic/lio_listio64.c: New file. * sysdeps/generic/lio_listio.c: New file. * sysdeps/generic/aio_cancel.c: New file. * sysdeps/generic/aio_misc.h: New file. * sysdeps/generic/aio_suspend.c: New file. * rt/aio_cancel.c: Moved to ... * sysdeps/pthread/aio_cancel.c: ... here. * rt/aio_fsync.c: Moved to ... * sysdeps/pthread/aio_fsync.c: ... here. * rt/aio_misc.c: Moved to ... * sysdeps/pthread/aio_misc.c: ... here. * rt/aio_misc.h: Moved to ... * sysdeps/pthread/aio_misc.h: ... here. * rt/aio_notify.c: Moved to ... * sysdeps/pthread/aio_notify.c: ... here. * rt/aio_read.c: Moved to ... * sysdeps/pthread/aio_read.c: ... here. * rt/aio_read64.c: Moved to ... * sysdeps/pthread/aio_read64.c: ... here. * rt/aio_suspend.c: Moved to ... * sysdeps/pthread/aio_suspend.c: ... here. * rt/aio_write.c: Moved to ... * sysdeps/pthread/aio_write.c: ... here. * rt/aio_write64.c: Moved to ... * sysdeps/pthread/aio_write64.c: ... here. * rt/lio_listio.c: Moved to ... * sysdeps/pthread/lio_listio.c: ... here. * rt/lio_listio64.c: Moved to ... * sysdeps/pthread/lio_listio64.c: ... here. --- sysdeps/pthread/aio_misc.h | 127 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 127 insertions(+) create mode 100644 sysdeps/pthread/aio_misc.h (limited to 'sysdeps/pthread/aio_misc.h') diff --git a/sysdeps/pthread/aio_misc.h b/sysdeps/pthread/aio_misc.h new file mode 100644 index 0000000000..372b5556ca --- /dev/null +++ b/sysdeps/pthread/aio_misc.h @@ -0,0 +1,127 @@ +/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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. */ + +#ifndef _AIO_MISC_H +#define _AIO_MISC_H 1 + +#include +#include + + +/* Extend the operation enum. */ +enum +{ + LIO_DSYNC = LIO_READ + 1, + LIO_SYNC, + LIO_READ64 = LIO_READ | 128, + LIO_WRITE64 = LIO_WRITE | 128 +}; + + +/* Union of the two request types. */ +typedef union + { + struct aiocb aiocb; + struct aiocb64 aiocb64; + } aiocb_union; + + +/* Used to synchronize. */ +struct waitlist + { + struct waitlist *next; + + pthread_cond_t *cond; + volatile int *counterp; + /* The next field is used in asynchronous `lio_listio' operations. */ + struct sigevent *sigevp; + /* XXX See requestlist, it's used to work around the broken signal + handling in Linux. */ + pid_t caller_pid; + }; + + +/* Status of a request. */ +enum +{ + no, + queued, + yes, + allocated, + done +}; + + +/* Used to queue requests.. */ +struct requestlist + { + int running; + + struct requestlist *last_fd; + struct requestlist *next_fd; + struct requestlist *next_prio; + struct requestlist *next_run; + + /* Pointer to the actual data. */ + aiocb_union *aiocbp; + + /* PID of the initiator thread. + XXX This is only necessary for the broken signal handling on Linux. */ + pid_t caller_pid; + + /* List of waiting processes. */ + struct waitlist *waiting; + }; + + +/* Lock for global I/O list of requests. */ +extern pthread_mutex_t __aio_requests_mutex; + + +/* Enqueue request. */ +extern struct requestlist *__aio_enqueue_request (aiocb_union *aiocbp, + int operation) + internal_function; + +/* Find request entry for given AIO control block. */ +extern struct requestlist *__aio_find_req (aiocb_union *elem) + internal_function; + +/* Find request entry for given file descriptor. */ +extern struct requestlist *__aio_find_req_fd (int fildes) internal_function; + +/* Remove request from the list. */ +extern void __aio_remove_request (struct requestlist *last, + struct requestlist *req, int all) + internal_function; + +/* Release the entry for the request. */ +extern void __aio_free_request (struct requestlist *req) internal_function; + +/* Notify initiator of request and tell this everybody listening. */ +extern void __aio_notify (struct requestlist *req) internal_function; + +/* Notify initiator of request. */ +extern int __aio_notify_only (struct sigevent *sigev, pid_t caller_pid) + internal_function; + +/* Send the signal. */ +extern int __aio_sigqueue (int sig, const union sigval val, pid_t caller_pid) + internal_function; + +#endif /* aio_misc.h */ -- cgit 1.4.1