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os2io.h
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1999-01-02
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/* -*-C-*-
$Id: os2io.h,v 1.4 1999/01/02 06:11:34 cph Exp $
Copyright (c) 1994-1999 Massachusetts Institute of Technology
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 SCM_OS2IO_H
#define SCM_OS2IO_H
#include "osio.h"
typedef enum
{
chop_close,
chop_read,
chop_write,
chop_input_buffered,
chop_input_flush,
chop_output_cooked,
chop_output_flush,
chop_output_drain
} chop_t;
typedef void * choparg_t;
typedef void (* channel_op_t)
(Tchannel, chop_t, choparg_t, choparg_t, choparg_t);
struct channel
{
LHANDLE handle;
channel_op_t operator;
void * operator_context;
enum channel_type type;
unsigned int open : 1;
unsigned int internal : 1;
unsigned int nonblocking : 1;
unsigned int inputp : 1;
unsigned int outputp : 1;
};
#define _CHANNEL(c) (OS2_channel_table [(c)])
#define CHANNEL_HANDLE(c) ((_CHANNEL (c)) . handle)
#define CHANNEL_OPERATOR(c) ((_CHANNEL (c)) . operator)
#define CHANNEL_OPERATOR_CONTEXT(c) ((_CHANNEL (c)) . operator_context)
#define CHANNEL_TYPE(c) ((_CHANNEL (c)) . type)
#define CHANNEL_OPEN(c) ((_CHANNEL (c)) . open)
#define CHANNEL_INTERNAL(c) ((_CHANNEL (c)) . internal)
#define CHANNEL_NONBLOCKING(c) ((_CHANNEL (c)) . nonblocking)
#define CHANNEL_INPUTP(c) ((_CHANNEL (c)) . inputp)
#define CHANNEL_OUTPUTP(c) ((_CHANNEL (c)) . outputp)
#define CHANNEL_ABSTRACT_P(c) ((CHANNEL_OPERATOR (c)) != 0)
#define channel_type_console channel_type_os2_console
#define channel_type_unnamed_pipe channel_type_os2_unnamed_pipe
#define channel_type_named_pipe channel_type_os2_named_pipe
/* Channel modes: */
#define CHANNEL_READ 1
#define CHANNEL_WRITE 2
extern struct channel * OS2_channel_table;
extern Tchannel * OS2_channel_pointer_table;
extern Tchannel OS2_make_channel (LHANDLE, unsigned int);
extern void OS2_initialize_channel
(Tchannel, LHANDLE, unsigned int, enum channel_type);
extern Tchannel OS2_allocate_channel (void);
extern void OS2_channel_close_all_noerror (void);
extern void OS_channel_close_on_abort (Tchannel);
extern void OS2_handle_close_on_abort (LHANDLE);
extern void OS2_channel_operation
(Tchannel, chop_t, choparg_t, choparg_t, choparg_t);
#endif /* SCM_OS2IO_H */