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(fd_set, filedesc): New structures.
(child_process, MAX_CHILDREN, CHILD_ACTIVE): Definitions moved
from ntproc.c.
(FD_SET, FD_CLR, FD_ISSET, FD_ZERO): Operate on fd_set structures.
(SELECT_TYPE): New macro.
New child process status enumeration.
(FILE_READ, FILE_WRITE, FILE_BINARY, FILE_PIPE, FILE_SOCKET):
New macros.
(fd_info, new_child, delete_child): Declared.
This commit is contained in:
Geoff Voelker 1996-05-03 18:33:20 +00:00
parent 480b0c5b52
commit b3fa71dc1b
1 changed files with 92 additions and 20 deletions
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112
src/w32.h
View file

@ -1,3 +1,6 @@
#ifndef _NT_H_
#define _NT_H_
/* Support routines for the NT version of Emacs.
Copyright (C) 1994 Free Software Foundation, Inc.
@ -18,28 +21,93 @@ 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. */
/* #define FULL_DEBUG */
#define EMACSDEBUG
#ifdef EMACSDEBUG
#define DebPrint(stuff) _DebPrint stuff
#else
#define DebPrint(stuff)
#endif
/* File descriptor set emulation. */
#ifdef FD_SET
/* We could get this from param.h, but better not to depend on finding that.
And better not to risk that it might define other symbols used in this
file. */
#ifdef FD_SETSIZE
#define MAXDESC FD_SETSIZE
#else
#define MAXDESC 64
#endif
#define SELECT_TYPE fd_set
#else /* no FD_SET */
#define MAXDESC 32
#define SELECT_TYPE int
/* 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;
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_PIPE 0x0100
#define FILE_SOCKET 0x0200
extern child_process * new_child (void);
extern void delete_child (child_process *cp);
/* ------------------------------------------------------------------------- */
/* Define the macros to access a single-int bitmap of descriptors. */
#define FD_SET(n, p) (*(p) |= (1 << (n)))
#define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
#define FD_ISSET(n, p) (*(p) & (1 << (n)))
#define FD_ZERO(p) (*(p) = 0)
#endif /* no FD_SET */
/* Prepare our standard handles for proper inheritance by child processes. */
extern void prepare_standard_handles (int in, int out,
@ -50,5 +118,9 @@ 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 nt_get_resource (char *key, LPDWORD type);
extern LPBYTE nt_get_resource (char * key, LPDWORD type);
extern void init_ntproc ();
extern void term_ntproc ();
#endif /* _NT_H_ */