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#define _RAD_PROCESS_H_ |
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#include <errno.h> |
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< |
#ifdef _WIN32 |
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> |
#include <stdio.h> |
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> |
#if defined(_WIN32) || defined(_WIN64) |
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#include <windows.h> /* DWORD etc. */ |
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< |
typedef DWORD pid_t; |
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> |
typedef DWORD RT_PID; |
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#include <process.h> /* getpid() and others */ |
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+ |
#define getpid _getpid |
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#define execv _execv |
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#define execvp _execvp |
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#else |
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#include <sys/param.h> |
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#include <sys/types.h> |
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typedef pid_t RT_PID; |
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#endif |
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|
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#include "paths.h" |
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This means that we shouldn't rely on PIDs and file descriptors |
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being the same type, so we have to describe processes with a struct, |
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< |
instead of the original int[3]. To keep things simple, we typedef |
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< |
the posix pid_t on those systems that don't have it already. |
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> |
instead of the original int[3]. For that purpose, we typedef a |
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> |
platform independent RT_PID. |
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> |
*/ |
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|
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Some older Windows systems use negative PIDs. Open_process() and |
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< |
close_process() will convert those to positive values during |
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< |
runtime, so that client modules can still use -1 as invalid PID. |
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> |
/* On Unix, we can set flags and assign descriptors before opening a |
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> |
process, coupling an existing input or output to the new process rather |
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> |
than opening both pipes. If PF_FILT_INP is passed in the flags member of |
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> |
SUBPROC, then the given r stream will be attached to the standard input |
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> |
of the child process, and subsequent reads from that descriptor in the |
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> |
parent get data from the standard output of the child, instead. The |
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> |
returned w descriptor is set to -1, since there is no longer any way |
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> |
to write to the input of the child. The default r descriptor of 0 will |
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> |
compel the child to act as a filter on the standard input of the parent. |
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> |
Whatever r handle you specify, the child will filter its read operations. |
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> |
Note that this should be called before anything has been buffered using r. |
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> |
If PF_FILT_OUT is set in flags, then the given w stream will be |
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> |
attached to the standard output of the child, and subsequent writes |
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> |
to that descriptor in the parent send data to the standard input |
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> |
of the child. The returned r descriptor is set to -1, since |
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> |
there is no output to read from any longer in the child. The |
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> |
default w descriptor of 1 will cause the child to act as a filter |
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> |
on the output of the parent. Make sure to call fflush(stdout) first |
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> |
if any data was buffered. It is illegal to set both PF_FILT_INP and |
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> |
PF_FILT_OUT, as a circular process is guaranteed to hang. |
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*/ |
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|
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#endif |
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#endif |
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#endif |
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+ |
/* process flags */ |
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+ |
#define PF_RUNNING 1 /* process is running */ |
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+ |
#define PF_FILT_INP 2 /* use assigned read descriptor */ |
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+ |
#define PF_FILT_OUT 4 /* use assigned write descriptor */ |
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|
| 80 |
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typedef struct { |
| 81 |
< |
int r; /* read handle */ |
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< |
int w; /* write handle */ |
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< |
int running; /* doing something */ |
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< |
pid_t pid; /* process ID */ |
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> |
int flags; /* what is being done */ |
| 82 |
> |
int r; /* read handle */ |
| 83 |
> |
int w; /* write handle */ |
| 84 |
> |
RT_PID pid; /* process ID */ |
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} SUBPROC; |
| 86 |
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|
| 87 |
< |
#define SP_INACTIVE {-1,-1,0,0} /* for static initializations */ |
| 87 |
> |
#define SP_INACTIVE {0,0,1,-1} /* for static initializations */ |
| 88 |
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|
| 89 |
+ |
#define close_process(pd) close_processes(pd,1) |
| 90 |
+ |
|
| 91 |
|
extern int open_process(SUBPROC *pd, char *av[]); |
| 92 |
< |
extern int close_process(SUBPROC *pd); |
| 92 |
> |
extern int close_processes(SUBPROC pd[], int nproc); |
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extern int process(SUBPROC *pd, char *recvbuf, char *sendbuf, int nbr, int nbs); |
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extern int readbuf(int fd, char *bpos, int siz); |
| 95 |
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extern int writebuf(int fd, char *bpos, int siz); |
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|
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+ |
#if defined(_WIN32) || defined(_WIN64) |
| 98 |
+ |
/* any non-negative increment will send the process to IDLE_PRIORITY_CLASS. */ |
| 99 |
+ |
extern int win_kill(RT_PID pid, int sig /* ignored */); |
| 100 |
+ |
extern int win_nice(int inc); |
| 101 |
+ |
#endif |
| 102 |
+ |
|
| 103 |
+ |
extern SUBPROC sp_inactive; |
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|
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|
#ifdef __cplusplus |
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} |
