* Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
-/*
+/*
* File: sys/aio.h
* Author: Umesh Vaishampayan [umeshv@apple.com]
* 05-Feb-2003 umeshv Created.
*
* Header file for POSIX Asynchronous IO APIs
*
- */
+ */
#ifndef _SYS_AIO_H_
-#define _SYS_AIO_H_
+#define _SYS_AIO_H_
#include <sys/signal.h>
#include <sys/_types.h>
/*
* [XSI] Inclusion of the <aio.h> header may make visible symbols defined
* in the headers <fcntl.h>, <signal.h>, <sys/types.h>, and <time.h>.
- *
+ *
* In our case, this is limited to struct timespec, off_t and ssize_t.
*/
#include <sys/_types/_timespec.h>
#ifndef KERNEL
struct aiocb {
- int aio_fildes; /* File descriptor */
- off_t aio_offset; /* File offset */
- volatile void *aio_buf; /* Location of buffer */
- size_t aio_nbytes; /* Length of transfer */
- int aio_reqprio; /* Request priority offset */
- struct sigevent aio_sigevent; /* Signal number and value */
- int aio_lio_opcode; /* Operation to be performed */
+ int aio_fildes; /* File descriptor */
+ off_t aio_offset; /* File offset */
+ volatile void *aio_buf; /* Location of buffer */
+ size_t aio_nbytes; /* Length of transfer */
+ int aio_reqprio; /* Request priority offset */
+ struct sigevent aio_sigevent; /* Signal number and value */
+ int aio_lio_opcode; /* Operation to be performed */
};
#endif /* KERNEL */
#ifdef KERNEL
struct user_aiocb {
- int aio_fildes; /* File descriptor */
- off_t aio_offset; /* File offset */
- user_addr_t aio_buf; /* Location of buffer */
- user_size_t aio_nbytes; /* Length of transfer */
- int aio_reqprio; /* Request priority offset */
- struct user_sigevent aio_sigevent; /* Signal number and value */
- int aio_lio_opcode; /* Operation to be performed */
+ int aio_fildes; /* File descriptor */
+ off_t aio_offset; /* File offset */
+ user_addr_t aio_buf; /* Location of buffer */
+ user_size_t aio_nbytes; /* Length of transfer */
+ int aio_reqprio; /* Request priority offset */
+ struct user_sigevent aio_sigevent; /* Signal number and value */
+ int aio_lio_opcode; /* Operation to be performed */
};
struct user64_aiocb {
- int aio_fildes; /* File descriptor */
- user64_off_t aio_offset; /* File offset */
- user64_addr_t aio_buf; /* Location of buffer */
- user64_size_t aio_nbytes; /* Length of transfer */
- int aio_reqprio; /* Request priority offset */
- struct user64_sigevent aio_sigevent; /* Signal number and value */
- int aio_lio_opcode; /* Operation to be performed */
+ int aio_fildes; /* File descriptor */
+ user64_off_t aio_offset; /* File offset */
+ user64_addr_t aio_buf; /* Location of buffer */
+ user64_size_t aio_nbytes; /* Length of transfer */
+ int aio_reqprio; /* Request priority offset */
+ struct user64_sigevent aio_sigevent; /* Signal number and value */
+ int aio_lio_opcode; /* Operation to be performed */
};
struct user32_aiocb {
- int aio_fildes; /* File descriptor */
- user32_off_t aio_offset; /* File offset */
- user32_addr_t aio_buf; /* Location of buffer */
- user32_size_t aio_nbytes; /* Length of transfer */
- int aio_reqprio; /* Request priority offset */
- struct user32_sigevent aio_sigevent; /* Signal number and value */
- int aio_lio_opcode; /* Operation to be performed */
+ int aio_fildes; /* File descriptor */
+ user32_off_t aio_offset; /* File offset */
+ user32_addr_t aio_buf; /* Location of buffer */
+ user32_size_t aio_nbytes; /* Length of transfer */
+ int aio_reqprio; /* Request priority offset */
+ struct user32_sigevent aio_sigevent; /* Signal number and value */
+ int aio_lio_opcode; /* Operation to be performed */
};
#endif // KERNEL
* none of the requested operations could be canceled since they are
* already complete.
*/
-#define AIO_ALLDONE 0x1
+#define AIO_ALLDONE 0x1
/* all requested operations have been canceled */
-#define AIO_CANCELED 0x2
+#define AIO_CANCELED 0x2
/*
* some of the requested operations could not be canceled since
* they are in progress
*/
-#define AIO_NOTCANCELED 0x4
+#define AIO_NOTCANCELED 0x4
/*
* lio_listio operation options
*/
-#define LIO_NOP 0x0 /* option indicating that no transfer is requested */
-#define LIO_READ 0x1 /* option requesting a read */
-#define LIO_WRITE 0x2 /* option requesting a write */
+#define LIO_NOP 0x0 /* option indicating that no transfer is requested */
+#define LIO_READ 0x1 /* option requesting a read */
+#define LIO_WRITE 0x2 /* option requesting a write */
/*
* lio_listio() modes
* the lio_listio() operation is being performed, and no
* notification is given when the operation is complete
*/
-#define LIO_NOWAIT 0x1
+#define LIO_NOWAIT 0x1
/*
* A lio_listio() synchronization operation indicating
* that the calling thread is to suspend until the
* lio_listio() operation is complete.
*/
-#define LIO_WAIT 0x2
+#define LIO_WAIT 0x2
/*
* Maximum number of operations in single lio_listio call
*/
-#define AIO_LISTIO_MAX 16
+#define AIO_LISTIO_MAX 16
#ifndef KERNEL
__BEGIN_DECLS
/*
- * Attempt to cancel one or more asynchronous I/O requests currently outstanding
- * against file descriptor fd. The aiocbp argument points to the asynchronous I/O
- * control block for a particular request to be canceled. If aiocbp is NULL, then
+ * Attempt to cancel one or more asynchronous I/O requests currently outstanding
+ * against file descriptor fd. The aiocbp argument points to the asynchronous I/O
+ * control block for a particular request to be canceled. If aiocbp is NULL, then
* all outstanding cancelable asynchronous I/O requests against fd shall be canceled.
*/
-int aio_cancel( int fd,
- struct aiocb * aiocbp );
-
+int aio_cancel( int fd,
+ struct aiocb * aiocbp );
+
/*
- * Return the error status associated with the aiocb structure referenced by the
- * aiocbp argument. The error status for an asynchronous I/O operation is the errno
+ * Return the error status associated with the aiocb structure referenced by the
+ * aiocbp argument. The error status for an asynchronous I/O operation is the errno
* value that would be set by the corresponding read(), write(), or fsync()
- * operation. If the operation has not yet completed, then the error status shall
+ * operation. If the operation has not yet completed, then the error status shall
* be equal to [EINPROGRESS].
*/
-int aio_error( const struct aiocb * aiocbp );
+int aio_error( const struct aiocb * aiocbp );
/*
- * Asynchronously force all I/O operations associated with the file indicated by
- * the file descriptor aio_fildes member of the aiocb structure referenced by the
- * aiocbp argument and queued at the time of the call to aio_fsync() to the
+ * Asynchronously force all I/O operations associated with the file indicated by
+ * the file descriptor aio_fildes member of the aiocb structure referenced by the
+ * aiocbp argument and queued at the time of the call to aio_fsync() to the
* synchronized I/O completion state. The function call shall return when the
* synchronization request has been initiated or queued. op O_SYNC is the only
* supported opertation at this time.
- * The aiocbp argument refers to an asynchronous I/O control block. The aiocbp
- * value may be used as an argument to aio_error() and aio_return() in order to
- * determine the error status and return status, respectively, of the asynchronous
- * operation while it is proceeding. When the request is queued, the error status
- * for the operation is [EINPROGRESS]. When all data has been successfully
- * transferred, the error status shall be reset to reflect the success or failure
+ * The aiocbp argument refers to an asynchronous I/O control block. The aiocbp
+ * value may be used as an argument to aio_error() and aio_return() in order to
+ * determine the error status and return status, respectively, of the asynchronous
+ * operation while it is proceeding. When the request is queued, the error status
+ * for the operation is [EINPROGRESS]. When all data has been successfully
+ * transferred, the error status shall be reset to reflect the success or failure
* of the operation.
*/
-int aio_fsync( int op,
- struct aiocb * aiocbp );
-
+int aio_fsync( int op,
+ struct aiocb * aiocbp );
+
/*
- * Read aiocbp->aio_nbytes from the file associated with aiocbp->aio_fildes into
- * the buffer pointed to by aiocbp->aio_buf. The function call shall return when
+ * Read aiocbp->aio_nbytes from the file associated with aiocbp->aio_fildes into
+ * the buffer pointed to by aiocbp->aio_buf. The function call shall return when
* the read request has been initiated or queued.
- * The aiocbp value may be used as an argument to aio_error() and aio_return() in
- * order to determine the error status and return status, respectively, of the
- * asynchronous operation while it is proceeding. If an error condition is
- * encountered during queuing, the function call shall return without having
- * initiated or queued the request. The requested operation takes place at the
- * absolute position in the file as given by aio_offset, as if lseek() were called
- * immediately prior to the operation with an offset equal to aio_offset and a
- * whence equal to SEEK_SET. After a successful call to enqueue an asynchronous
+ * The aiocbp value may be used as an argument to aio_error() and aio_return() in
+ * order to determine the error status and return status, respectively, of the
+ * asynchronous operation while it is proceeding. If an error condition is
+ * encountered during queuing, the function call shall return without having
+ * initiated or queued the request. The requested operation takes place at the
+ * absolute position in the file as given by aio_offset, as if lseek() were called
+ * immediately prior to the operation with an offset equal to aio_offset and a
+ * whence equal to SEEK_SET. After a successful call to enqueue an asynchronous
* I/O operation, the value of the file offset for the file is unspecified.
*/
-int aio_read( struct aiocb * aiocbp );
+int aio_read( struct aiocb * aiocbp );
/*
- * Return the return status associated with the aiocb structure referenced by
- * the aiocbp argument. The return status for an asynchronous I/O operation is
- * the value that would be returned by the corresponding read(), write(), or
- * fsync() function call. If the error status for the operation is equal to
- * [EINPROGRESS], then the return status for the operation is undefined. The
- * aio_return() function may be called exactly once to retrieve the return status
- * of a given asynchronous operation; thereafter, if the same aiocb structure
- * is used in a call to aio_return() or aio_error(), an error may be returned.
+ * Return the return status associated with the aiocb structure referenced by
+ * the aiocbp argument. The return status for an asynchronous I/O operation is
+ * the value that would be returned by the corresponding read(), write(), or
+ * fsync() function call. If the error status for the operation is equal to
+ * [EINPROGRESS], then the return status for the operation is undefined. The
+ * aio_return() function may be called exactly once to retrieve the return status
+ * of a given asynchronous operation; thereafter, if the same aiocb structure
+ * is used in a call to aio_return() or aio_error(), an error may be returned.
* When the aiocb structure referred to by aiocbp is used to submit another
- * asynchronous operation, then aio_return() may be successfully used to
+ * asynchronous operation, then aio_return() may be successfully used to
* retrieve the return status of that operation.
*/
-ssize_t aio_return( struct aiocb * aiocbp );
+ssize_t aio_return( struct aiocb * aiocbp );
/*
- * Suspend the calling thread until at least one of the asynchronous I/O
- * operations referenced by the aiocblist argument has completed, until a signal
- * interrupts the function, or, if timeout is not NULL, until the time
- * interval specified by timeout has passed. If any of the aiocb structures
- * in the aiocblist correspond to completed asynchronous I/O operations (that is,
- * the error status for the operation is not equal to [EINPROGRESS]) at the
- * time of the call, the function shall return without suspending the calling
- * thread. The aiocblist argument is an array of pointers to asynchronous I/O
- * control blocks. The nent argument indicates the number of elements in the
- * array. Each aiocb structure pointed to has been used in initiating an
- * asynchronous I/O request via aio_read(), aio_write(), or lio_listio(). This
+ * Suspend the calling thread until at least one of the asynchronous I/O
+ * operations referenced by the aiocblist argument has completed, until a signal
+ * interrupts the function, or, if timeout is not NULL, until the time
+ * interval specified by timeout has passed. If any of the aiocb structures
+ * in the aiocblist correspond to completed asynchronous I/O operations (that is,
+ * the error status for the operation is not equal to [EINPROGRESS]) at the
+ * time of the call, the function shall return without suspending the calling
+ * thread. The aiocblist argument is an array of pointers to asynchronous I/O
+ * control blocks. The nent argument indicates the number of elements in the
+ * array. Each aiocb structure pointed to has been used in initiating an
+ * asynchronous I/O request via aio_read(), aio_write(), or lio_listio(). This
* array may contain NULL pointers, which are ignored.
*/
-int aio_suspend( const struct aiocb *const aiocblist[],
- int nent,
- const struct timespec * timeoutp ) __DARWIN_ALIAS_C(aio_suspend);
-
+int aio_suspend( const struct aiocb *const aiocblist[],
+ int nent,
+ const struct timespec * timeoutp ) __DARWIN_ALIAS_C(aio_suspend);
+
/*
- * Write aiocbp->aio_nbytes to the file associated with aiocbp->aio_fildes from
- * the buffer pointed to by aiocbp->aio_buf. The function shall return when the
+ * Write aiocbp->aio_nbytes to the file associated with aiocbp->aio_fildes from
+ * the buffer pointed to by aiocbp->aio_buf. The function shall return when the
* write request has been initiated or, at a minimum, queued.
- * The aiocbp argument may be used as an argument to aio_error() and aio_return()
- * in order to determine the error status and return status, respectively, of the
+ * The aiocbp argument may be used as an argument to aio_error() and aio_return()
+ * in order to determine the error status and return status, respectively, of the
* asynchronous operation while it is proceeding.
*/
-int aio_write( struct aiocb * aiocbp );
+int aio_write( struct aiocb * aiocbp );
/*
- * Initiate a list of I/O requests with a single function call. The mode
- * argument takes one of the values LIO_WAIT or LIO_NOWAIT and determines whether
- * the function returns when the I/O operations have been completed, or as soon
- * as the operations have been queued. If the mode argument is LIO_WAIT, the
- * function shall wait until all I/O is complete and the sig argument shall be
- * ignored.
- * If the mode argument is LIO_NOWAIT, the function shall return immediately, and
- * asynchronous notification shall occur, according to the sig argument, when all
+ * Initiate a list of I/O requests with a single function call. The mode
+ * argument takes one of the values LIO_WAIT or LIO_NOWAIT and determines whether
+ * the function returns when the I/O operations have been completed, or as soon
+ * as the operations have been queued. If the mode argument is LIO_WAIT, the
+ * function shall wait until all I/O is complete and the sig argument shall be
+ * ignored.
+ * If the mode argument is LIO_NOWAIT, the function shall return immediately, and
+ * asynchronous notification shall occur, according to the sig argument, when all
* the I/O operations complete. If sig is NULL, then no asynchronous notification
* shall occur.
*/
-int lio_listio( int mode,
- struct aiocb *const aiocblist[],
- int nent,
- struct sigevent *sigp );
+int lio_listio( int mode,
+ struct aiocb *const aiocblist[],
+ int nent,
+ struct sigevent *sigp );
__END_DECLS
#endif /* KERNEL */
projects / apple / xnu.git / blobdiff