4febd10272
(putpkt, getpkt): Use new return codes for SERIAL_READCHAR. * ser-go32.c: Return -1 on most failures, 0 on most successes, and use new return codes for go32_readchar(). * ser-unix.c: Ditto. Also, move error handling up to caller for SERIAL_SETBAUDRATE(). * serial.c (serial_open): Internal call, not SERIAL_OPEN to get to specific routine. (serial_close): New routine to wrap around device close routine. serial.h: Clean & document return values more clearly.
95 lines
3 KiB
C
95 lines
3 KiB
C
/* Remote serial support interface definitions for GDB, the GNU Debugger.
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Copyright 1992, 1993 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Terminal state pointer. This is specific to each type of interface. */
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typedef PTR ttystate;
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struct _serial_t
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{
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int fd;
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struct serial_ops *ops;
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ttystate ttystate;
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int bufcnt;
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unsigned char *bufp;
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unsigned char buf[BUFSIZ];
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};
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typedef struct _serial_t *serial_t;
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struct serial_ops {
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char *name;
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struct serial_ops *next;
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int (*open) PARAMS ((serial_t, const char *name));
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void (*close) PARAMS ((serial_t));
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int (*readchar) PARAMS ((serial_t, int timeout));
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int (*write) PARAMS ((serial_t, const char *str, int len));
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void (*go_raw) PARAMS ((serial_t));
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void (*restore) PARAMS ((serial_t));
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int (*setbaudrate) PARAMS ((serial_t, int rate));
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};
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/* Add a new serial interface to the interface list */
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void serial_add_interface PARAMS ((struct serial_ops *optable));
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serial_t serial_open PARAMS ((const char *name));
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/* For most routines, if a failure is indicated, then errno should be
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examined. */
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/* Try to open NAME. Returns a new serial_t on success, NULL on failure.
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*/
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#define SERIAL_OPEN(NAME) serial_open(NAME)
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/* Turn the port into raw mode. */
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#define SERIAL_RAW(SERIAL_T) (SERIAL_T)->ops->go_raw((SERIAL_T))
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/* Read one char from the serial device with TIMEOUT seconds timeout.
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Returns char if ok, else one of the following codes. Note that all
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error codes are guaranteed to be < 0. */
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#define SERIAL_ERROR -1 /* General error, see errno for details */
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#define SERIAL_TIMEOUT -2
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#define SERIAL_EOF -3
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#define SERIAL_READCHAR(SERIAL_T, TIMEOUT) ((SERIAL_T)->ops->readchar((SERIAL_T), TIMEOUT))
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/* Set the baudrate to the decimal value supplied. Returns 0 for success,
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-1 for failure. */
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#define SERIAL_SETBAUDRATE(SERIAL_T, RATE) ((SERIAL_T)->ops->setbaudrate((SERIAL_T), RATE))
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/* Write LEN chars from STRING to the port SERIAL_T. Returns 0 for success,
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-1 for failure. */
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#define SERIAL_WRITE(SERIAL_T, STRING, LEN) ((SERIAL_T)->ops->write((SERIAL_T), STRING, LEN))
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/* Push out all buffers, close the device and destroy SERIAL_T. */
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void serial_close PARAMS ((serial_t));
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#define SERIAL_CLOSE(SERIAL_T) serial_close(SERIAL_T)
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/* Restore the serial port to the state saved in oldstate. XXX - currently
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unused! */
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#define SERIAL_RESTORE(SERIAL_T) (SERIAL_T)->ops->restore((SERIAL_T))
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