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[/] [openrisc/] [trunk/] [rtos/] [ecos-3.0/] [packages/] [io/] [common/] [current/] [include/] [file.h] - Rev 825
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//========================================================================== // // io/common/include/file.h // // Defines for high level file I/O // //========================================================================== // ####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later // version. // // eCos 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 General Public License // for more details. // // You should have received a copy of the GNU General Public License // along with eCos; if not, write to the Free Software Foundation, Inc., // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. // // As a special exception, if other files instantiate templates or use // macros or inline functions from this file, or you compile this file // and link it with other works to produce a work based on this file, // this file does not by itself cause the resulting work to be covered by // the GNU General Public License. However the source code for this file // must still be made available in accordance with section (3) of the GNU // General Public License v2. // // This exception does not invalidate any other reasons why a work based // on this file might be covered by the GNU General Public License. // ------------------------------------------- // ####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): gthomas // Contributors: gthomas // Date: 2000-01-10 // Purpose: // Description: // // //####DESCRIPTIONEND#### // //========================================================================== #ifndef _CYG_IO_FILE_H_ #define _CYG_IO_FILE_H_ #include <pkgconf/system.h> //========================================================================== // If the fileio package is loaded, we need to go through that to do all // basic IO operations. This code redefines the tags on the structures so // that they have the names expected by BSD based code. #ifdef CYGPKG_IO_FILEIO #include <pkgconf/io_fileio.h> #define CYG_IOVEC_TAG iovec #define CYG_UIO_TAG uio #define CYG_FILEOPS_TAG fileops #define CYG_FILE_TAG file #define CYG_SELINFO_TAG selinfo #include <cyg/fileio/fileio.h> // File states #define FREAD CYG_FREAD #define FWRITE CYG_FWRITE #define FNONBLOCK CYG_FNONBLOCK #define FASYNC CYG_FASYNC // Type of "file" #define DTYPE_VNODE CYG_FILE_TYPE_FILE /* file */ #define DTYPE_SOCKET CYG_FILE_TYPE_SOCKET /* communications endpoint */ //========================================================================== // Otherwise define all the structs here... #else // CYGPKG_IO_FILEIO // High-level file I/O interfaces // Derived [in part] from OpenBSD <sys/file.h>, <sys/uio.h>, <sys/fcntl.h> #include <pkgconf/io.h> #include <cyg/infra/cyg_type.h> #define NFILE CYGPKG_IO_NFILE struct iovec { void *iov_base; /* Base address. */ CYG_ADDRWORD iov_len; /* Length. */ }; enum uio_rw { UIO_READ, UIO_WRITE }; /* Segment flag values. */ enum uio_seg { UIO_USERSPACE, /* from user data space */ UIO_SYSSPACE /* from system space */ }; struct uio { struct iovec *uio_iov; /* pointer to array of iovecs */ int uio_iovcnt; /* number of iovecs in array */ CYG_ADDRWORD uio_offset; /* offset into file this uio corresponds to */ CYG_ADDRWORD uio_resid; /* residual i/o count */ enum uio_seg uio_segflg; /* see above */ enum uio_rw uio_rw; /* see above */ }; /* * Limits */ #define UIO_SMALLIOV 8 /* 8 on stack, else malloc */ // Description of open file struct file { short f_flag; /* file state */ short f_type; /* descriptor type */ struct fileops { int (*fo_read)(struct file *fp, struct uio *uio); int (*fo_write)(struct file *fp, struct uio *uio); int (*fo_ioctl)(struct file *fp, CYG_ADDRWORD com, CYG_ADDRWORD data); int (*fo_select)(struct file *fp, int which); int (*fo_close)(struct file *fp); } *f_ops; CYG_ADDRWORD f_offset; CYG_ADDRWORD f_data; /* vnode or socket */ }; // File states #define FREAD 0x01 #define FWRITE 0x02 #define FNONBLOCK 0x10 #define FASYNC 0x20 #define FALLOC 0x80 // File is "busy", i.e. allocated // Type of "file" #define DTYPE_VNODE 1 /* file */ #define DTYPE_SOCKET 2 /* communications endpoint */ #define DTYPE_PIPE 3 /* pipe */ externC cyg_bool getfp(int fdes, struct file **fp); externC int falloc(struct file **fp, int *fd); externC void ffree(struct file *fp); //========================================================================== #endif // CYGPKG_IO_FILEIO //========================================================================== #endif // _CYG_IO_FILE_H_
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