1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/* This file is part of the KDE libraries
Copyright (C) 1997 Christian Czezakte (e9025461@student.tuwien.ac.at)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef __KPROCCTRL_H__
#define __KPROCCTRL_H__
#include <tqvaluelist.h>
#include "kprocess.h"
class TQSocketNotifier;
/**
* @short Used internally by KProcess
* @internal
* @author Christian Czezatke <e9025461@student.tuwien.ac.at>
*
* A class for internal use by KProcess only. -- Exactly one instance
* of this class is created by KApplication.
*
* This class takes care of the actual (UN*X) signal handling.
*/
class KDECORE_EXPORT KProcessController : public TQObject
{
Q_OBJECT
public:
/**
* Create an instance if none exists yet.
* Called by KApplication::KApplication()
*/
static void ref();
/**
* Destroy the instance if one exists and it is not referenced any more.
* Called by KApplication::~KApplication()
*/
static void deref();
/**
* Only a single instance of this class is allowed at a time,
* and this static variable is used to track the one instance.
*/
static KProcessController *theKProcessController; // kde4: rename: instance
/**
* Automatically called upon SIGCHLD. Never call it directly.
* If your application (or some library it uses) redirects SIGCHLD,
* the new signal handler (and only it) should call the old handler
* returned by sigaction().
* @internal
*/
static void theSigCHLDHandler(int signal); // KDE4: private
/**
* Wait for any process to exit and handle their exit without
* starting an event loop.
* This function may cause KProcess to emit any of its signals.
*
* @param timeout the timeout in seconds. -1 means no timeout.
* @return true if a process exited, false
* if no process exited within @p timeout seconds.
* @since 3.1
*/
bool waitForProcessExit(int timeout);
/**
* Call this function to defer processing of the data that became available
* on notifierFd().
* @since 3.2
*/
void unscheduleCheck();
/**
* This function @em must be called at some point after calling
* unscheduleCheck().
* @since 3.2
*/
void rescheduleCheck();
/*
* Obtain the file descriptor KProcessController uses to get notified
* about process exits. select() or poll() on it if you create a custom
* event loop that needs to act upon SIGCHLD.
* @return the file descriptor of the reading end of the notification pipe
* @since 3.2
*/
int notifierFd() const;
/**
* @internal
*/
void addKProcess( KProcess* );
/**
* @internal
*/
void removeKProcess( KProcess* );
/**
* @internal
*/
void addProcess( int pid );
private slots:
void slotDoHousekeeping();
private:
friend class I_just_love_gcc;
int fd[2];
bool needcheck;
TQSocketNotifier *notifier;
TQValueList<KProcess*> kProcessList;
TQValueList<int> unixProcessList;
static void setupHandlers();
static void resetHandlers();
static struct sigaction oldChildHandlerData;
static bool handlerSet;
static int refCount;
// Disallow instantiation
KProcessController();
~KProcessController();
// Disallow assignment and copy-construction
KProcessController( const KProcessController& );
KProcessController& operator= ( const KProcessController& );
};
#endif
|
