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[/] [openrisc/] [trunk/] [or1ksim/] [peripheral/] [channels/] [channel.h] - Rev 306
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/* channel.h -- Definition of types and structures for peripheral to communicate with host. Addapted from UML. Copyright (C) 2002 Richard Prescott <rip@step.polymtl.ca> Copyright (C) 2008 Embecosm Limited Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator. This program 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 3 of the License, or (at your option) any later version. This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ /* This program is commented throughout in a fashion suitable for processing with Doxygen. */ #ifndef CHANNEL__H #define CHANNEL__H /*! A data structure representing all the functions required on a channel */ struct channel_ops { void *(*init) (const char *); int (*open) (void *); void (*close) (void *); int (*read) (void *, char *, int); int (*write) (void *, const char *, int); void (*free) (void *); int (*isok) (void *); char *(*status) (void *); }; /*! A data structure representing a channel. Its operations and data */ struct channel { const struct channel_ops *ops; void *data; }; /* Function prototypes for external use */ extern struct channel *channel_init (const char *descriptor); extern int channel_open (struct channel *channel); extern int channel_read (struct channel *channel, char *buffer, int size); extern int channel_write (struct channel *channel, const char *buffer, int size); extern void channel_close (struct channel *channel); #endif /* CHANNEL__H */
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