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[/] [or1k/] [tags/] [nog_patch_49/] [or1ksim/] [peripheral/] [channels/] [channel.h] - Rev 1070
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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> This file is part of 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 2 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, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef CHANNEL_H #define CHANNEL_H 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*); }; struct channel { const struct channel_ops * ops; void * data; }; struct channel * channel_init(const char * descriptor); /* read operation in non-blocking */ int channel_open(struct channel * channel); int channel_read(struct channel * channel, char * buffer, int size); int channel_write(struct channel * channel, const char * buffer, int size); void channel_free(struct channel * channel); int channel_ok(struct channel * channel); char * channel_status(struct channel * channel); void channel_close(struct channel * channel); int register_channel(const char * name, const struct channel_ops * ops); /* TODO: int unregister_channel(const char * name); */ /* for those who wants to automatically register at startup */ #define REGISTER_CHANNEL(NAME,OPS) \ static int NAME ## _dummy_register = register_channel(#NAME, OPS) #endif /* * Local variables: * c-file-style: "linux" * End: */
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