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Diffstat (limited to 'REORG.TODO/sysdeps/pthread/aio_misc.h')
| -rw-r--r-- | REORG.TODO/sysdeps/pthread/aio_misc.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/pthread/aio_misc.h b/REORG.TODO/sysdeps/pthread/aio_misc.h new file mode 100644 index 0000000000..3315d82400 --- /dev/null +++ b/REORG.TODO/sysdeps/pthread/aio_misc.h @@ -0,0 +1,143 @@ +/* Copyright (C) 1997-2017 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 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, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _AIO_MISC_H +#define _AIO_MISC_H 1 + +#include <aio.h> +#include <pthread.h> + + +/* Extend the operation enum. */ +enum +{ + LIO_DSYNC = LIO_NOP + 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; + + /* The next two fields is used in synchronous `lio_listio' operations. */ +#ifndef DONT_NEED_AIO_MISC_COND + pthread_cond_t *cond; +#endif + int *result; + + volatile unsigned int *counterp; + /* The next field is used in asynchronous `lio_listio' operations. */ + struct sigevent *sigevp; +#ifdef BROKEN_THREAD_SIGNALS + /* XXX See requestlist, it's used to work around the broken signal + handling in Linux. */ + pid_t caller_pid; +#endif + }; + + +/* 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; + +#ifdef BROKEN_THREAD_SIGNALS + /* PID of the initiator thread. + XXX This is only necessary for the broken signal handling on Linux. */ + pid_t caller_pid; +#endif + + /* List of waiting processes. */ + struct waitlist *waiting; + }; + + +/* Lock for global I/O list of requests. */ +extern pthread_mutex_t __aio_requests_mutex attribute_hidden; + + +/* Enqueue request. */ +extern struct requestlist *__aio_enqueue_request (aiocb_union *aiocbp, + int operation) + attribute_hidden internal_function; + +/* Find request entry for given AIO control block. */ +extern struct requestlist *__aio_find_req (aiocb_union *elem) + attribute_hidden internal_function; + +/* Find request entry for given file descriptor. */ +extern struct requestlist *__aio_find_req_fd (int fildes) + attribute_hidden internal_function; + +/* Remove request from the list. */ +extern void __aio_remove_request (struct requestlist *last, + struct requestlist *req, int all) + attribute_hidden internal_function; + +/* Release the entry for the request. */ +extern void __aio_free_request (struct requestlist *req) + attribute_hidden internal_function; + +/* Notify initiator of request and tell this everybody listening. */ +extern void __aio_notify (struct requestlist *req) + attribute_hidden internal_function; + +/* Notify initiator of request. */ +#ifdef BROKEN_THREAD_SIGNALS +extern int __aio_notify_only (struct sigevent *sigev, pid_t caller_pid) + attribute_hidden internal_function; +#else +extern int __aio_notify_only (struct sigevent *sigev) + attribute_hidden internal_function; +#endif + +/* Send the signal. */ +extern int __aio_sigqueue (int sig, const union sigval val, pid_t caller_pid) + attribute_hidden internal_function; + +#endif /* aio_misc.h */ |