1 |
/* RCSid $Id: rtprocess.h,v 3.15 2016/03/04 02:48:14 greg Exp $ */ |
2 |
/* |
3 |
* rtprocess.h |
4 |
* Routines to communicate with separate process via dual pipes |
5 |
* |
6 |
* WARNING: On Windows, there's a system header named <process.h>. |
7 |
*/ |
8 |
#ifndef _RAD_PROCESS_H_ |
9 |
#define _RAD_PROCESS_H_ |
10 |
|
11 |
#include <errno.h> |
12 |
#include <stdio.h> |
13 |
#if defined(_WIN32) || defined(_WIN64) |
14 |
#include <windows.h> /* DWORD etc. */ |
15 |
typedef DWORD RT_PID; |
16 |
#include <process.h> /* getpid() and others */ |
17 |
#define getpid _getpid |
18 |
#define execv _execv |
19 |
#else |
20 |
#include <sys/param.h> |
21 |
#include <sys/types.h> |
22 |
typedef pid_t RT_PID; |
23 |
#endif |
24 |
|
25 |
#include "paths.h" |
26 |
|
27 |
#ifdef __cplusplus |
28 |
extern "C" { |
29 |
#endif |
30 |
|
31 |
/* On Windows, a process ID is a DWORD. That might actually be the |
32 |
same thing as an int, but it's better not to assume anything. |
33 |
|
34 |
This means that we shouldn't rely on PIDs and file descriptors |
35 |
being the same type, so we have to describe processes with a struct, |
36 |
instead of the original int[3]. For that purpose, we typedef a |
37 |
platform independent RT_PID. |
38 |
*/ |
39 |
|
40 |
|
41 |
#ifndef PIPE_BUF |
42 |
#ifdef PIPSIZ |
43 |
#define PIPE_BUF PIPSIZ |
44 |
#else |
45 |
#ifdef PIPE_MAX |
46 |
#define PIPE_BUF PIPE_MAX |
47 |
#else |
48 |
#define PIPE_BUF 512 /* hyperconservative */ |
49 |
#endif |
50 |
#endif |
51 |
#endif |
52 |
|
53 |
typedef struct { |
54 |
int r; /* read handle */ |
55 |
int w; /* write handle */ |
56 |
int running; /* doing something */ |
57 |
RT_PID pid; /* process ID */ |
58 |
} SUBPROC; |
59 |
|
60 |
#define SP_INACTIVE {-1,-1,0,0} /* for static initializations */ |
61 |
|
62 |
#define close_process(pd) close_processes(pd,1) |
63 |
|
64 |
extern int open_process(SUBPROC *pd, char *av[]); |
65 |
extern int close_processes(SUBPROC pd[], int nproc); |
66 |
extern int process(SUBPROC *pd, char *recvbuf, char *sendbuf, int nbr, int nbs); |
67 |
extern int readbuf(int fd, char *bpos, int siz); |
68 |
extern int writebuf(int fd, char *bpos, int siz); |
69 |
|
70 |
#if defined(_WIN32) || defined(_WIN64) |
71 |
/* any non-negative increment will send the process to IDLE_PRIORITY_CLASS. */ |
72 |
extern int win_kill(RT_PID pid, int sig /* ignored */); |
73 |
extern int win_nice(int inc); |
74 |
#endif |
75 |
|
76 |
|
77 |
#ifdef __cplusplus |
78 |
} |
79 |
#endif |
80 |
#endif /* _RAD_PROCESS_H_ */ |
81 |
|