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tag: libc-971211
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#ifndef _NT_H_
#define _NT_H_
/* Support routines for the NT version of Emacs.
Copyright (C) 1994 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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.
GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* File descriptor set emulation. */
/* MSVC runtime library has limit of 64 descriptors by default */
#define FD_SETSIZE 64
typedef struct {
unsigned int bits[FD_SETSIZE / 32];
} fd_set;
/* standard access macros */
#define FD_SET(n, p) \
do { \
if ((n) < FD_SETSIZE) { \
(p)->bits[(n)/32] |= (1 << (n)%32); \
} \
} while (0)
#define FD_CLR(n, p) \
do { \
if ((n) < FD_SETSIZE) { \
(p)->bits[(n)/32] &= ~(1 << (n)%32); \
} \
} while (0)
#define FD_ISSET(n, p) ((n) < FD_SETSIZE ? ((p)->bits[(n)/32] & (1 << (n)%32)) : 0)
#define FD_ZERO(p) memset((p), 0, sizeof(fd_set))
#define SELECT_TYPE fd_set
/* ------------------------------------------------------------------------- */
/* child_process.status values */
enum {
STATUS_READ_ERROR = -1,
STATUS_READ_READY,
STATUS_READ_IN_PROGRESS,
STATUS_READ_FAILED,
STATUS_READ_SUCCEEDED,
STATUS_READ_ACKNOWLEDGED
};
/* This structure is used for both pipes and sockets; for
a socket, the process handle in pi is NULL. */
typedef struct _child_process
{
int fd;
int pid;
HANDLE char_avail;
HANDLE char_consumed;
HANDLE thrd;
HWND hwnd;
PROCESS_INFORMATION procinfo;
volatile int status;
char chr;
} child_process;
#define MAXDESC FD_SETSIZE
#define MAX_CHILDREN MAXDESC/2
#define CHILD_ACTIVE(cp) ((cp)->char_avail != NULL)
/* parallel array of private info on file handles */
typedef struct
{
unsigned flags;
HANDLE hnd;
child_process * cp;
} filedesc;
extern filedesc fd_info [ MAXDESC ];
/* fd_info flag definitions */
#define FILE_READ 0x0001
#define FILE_WRITE 0x0002
#define FILE_BINARY 0x0010
#define FILE_LAST_CR 0x0020
#define FILE_PIPE 0x0100
#define FILE_SOCKET 0x0200
extern child_process * new_child (void);
extern void delete_child (child_process *cp);
/* ------------------------------------------------------------------------- */
/* Get long (aka "true") form of file name, if it exists. */
extern BOOL w32_get_long_filename (char * name, char * buf, int size);
/* Prepare our standard handles for proper inheritance by child processes. */
extern void prepare_standard_handles (int in, int out,
int err, HANDLE handles[4]);
/* Reset our standard handles to their original state. */
extern void reset_standard_handles (int in, int out,
int err, HANDLE handles[4]);
/* Return the string resource associated with KEY of type TYPE. */
extern LPBYTE w32_get_resource (char * key, LPDWORD type);
extern void init_ntproc ();
extern void term_ntproc ();
#endif /* _NT_H_ */
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