101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/**
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* =========================================================================
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* File : waio.h
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* Project : 0 A.D.
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* Description : emulate POSIX asynchronous I/O on Windows.
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*
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* @author Jan.Wassenberg@stud.uni-karlsruhe.de
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* =========================================================================
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*/
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/*
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* Copyright (c) 2003-2004 Jan Wassenberg
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*
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* Redistribution and/or modification are also permitted under the
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* terms of the GNU General Public License as published by the
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* Free Software Foundation (version 2 or later, at your option).
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef WAIO_H__
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#define WAIO_H__
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#include "lib/types.h"
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#include "wposix_types.h"
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// Note: for maximum efficiency, transfer buffers, offsets, and lengths
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// should be sector aligned (otherwise, buffer is copied).
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//
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// <signal.h>
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//
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union sigval
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{
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int sival_int; // Integer signal value.
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void* sival_ptr; // Pointer signal value.
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};
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struct sigevent
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{
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int sigev_notify; // notification mode
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int sigev_signo; // signal number
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union sigval sigev_value; // signal value
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void (*sigev_notify_function)(union sigval);
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};
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//
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// <aio.h>
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//
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struct aiocb
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{
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int aio_fildes; // File descriptor.
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off_t aio_offset; // File offset.
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volatile void* aio_buf; // Location of buffer.
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size_t aio_nbytes; // Length of transfer.
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int aio_reqprio; // Request priority offset.
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struct sigevent aio_sigevent; // Signal number and value.
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int aio_lio_opcode; // Operation to be performed.
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};
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enum
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{
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// aio_cancel return
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AIO_ALLDONE, // None of the requested operations could be canceled since they are already complete.
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AIO_CANCELED, // All requested operations have been canceled.
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AIO_NOTCANCELED, // Some of the requested operations could not be canceled since they are in progress.
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// lio_listio mode
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LIO_WAIT, // wait until all I/O is complete
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LIO_NOWAIT,
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// lio_listio ops
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LIO_NOP,
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LIO_READ,
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LIO_WRITE
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};
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extern int aio_cancel(int, struct aiocb*);
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extern int aio_error(const struct aiocb*);
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extern int aio_fsync(int, struct aiocb*);
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extern int aio_read(struct aiocb*);
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extern ssize_t aio_return(struct aiocb*);
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extern int aio_suspend(const struct aiocb* const[], int, const struct timespec*);
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extern int aio_write(struct aiocb*);
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extern int lio_listio(int, struct aiocb* const[], int, struct sigevent*);
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extern int aio_close(int fd);
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extern int aio_reopen(int fd, const char* fn, int oflag, ...);
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// allocate and return a file descriptor
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extern int aio_assign_handle(uintptr_t handle);
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#endif // #ifndef WAIO_H__
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