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
|
/*
* The Unix Channel
*
* by Michel Beaudouin-Lafon
*
* Copyright 1990-1993
* Laboratoire de Recherche en Informatique (LRI)
*
* Channel sets, or multiplexers
*
* $Id$
* $CurLog$
*/
#ifndef UchMultiplexer_H_
#define UchMultiplexer_H_
#include "dnn/Loop.h"
#include "Channel.h"
#include <sys/types.h>
#include "ccu/Timer.h"
extern char* StrReprBuf;
// This class defines channel sets for multiplexing i/o
// Because of the coercion defined for FILDES -> int,
// most arguments of type ints can be FILDES, UchChannel, ...
// An array of pointers to channels is kept in the object;
// The masks for reading/writing are kept consistent with the IOMode of
// the channels, as long as it is not changed by a direct access to the channel
// operator[] returns a pointer and cannot be used as an lhs of an assignment.
//
// WARNING: when the Multiplexer is deleted, the Channels it still
// have in its channel set are not Removed; instead UchChannel::Removed
// is called
typedef DnnMpxHook UchMpxHook;
class UchBaseMultiplexer : public DnnBaseMultiplexer {
friend class UchBaseTimeOut;
friend class UchBaseSignalHandler;
friend class UchChannel;
friend MPX_RES UchLoop ();
protected:
UchChannel** Channels;
CcuTimerSet Timers;
short ReadCount;
short WriteCount;
short SelectCount;
bool Looping;
bool SigFired;
UchBaseSignalHandler** Handlers;
int* NbSignals;
bool Add (UchChannel*);
bool Remove (int);
void HandleSignal (UchBaseSignalHandler&);
void HandleDeferredSignals ();
inline CcuTimerSet* GetTimerSet () { return &Timers; }
virtual void SetMasks (int, IOMODE);
virtual void SetTimeOut (Millisecond) = 0;
virtual void SuppressTimeOut () = 0;
virtual void AddSignalHook ();
public:
UchBaseMultiplexer ();
~UchBaseMultiplexer ();
UchChannel* operator [] (int);
void RemoveAll ();
void SetMode (int, IOMODE);
MPX_RES Run ();
void Abort ();
void Close ();
};
class UchMultiplexer : public UchBaseMultiplexer {
protected:
fd_set ReadMask;
fd_set WriteMask;
fd_set SelectMask;
CcuList Hooks;
CcuList FinalHooks;
bool Looping;
Millisecond TimeOut;
void SetMasks (int, IOMODE);
void SetTimeOut (Millisecond);
void SuppressTimeOut ();
MPX_RES Loop ();
void ExecHooks (bool = false);
public:
UchMultiplexer ();
~UchMultiplexer ();
MPX_RES LoopScan (bool nointr = true);
int Scan (bool nointr = true, bool poll = false);
void Stop ();
char* StrRepr (char* = StrReprBuf);
void AddHook (DnnMpxHook*, bool = false);
void RemoveHook (DnnMpxHook*, bool = false);
void AddFinalHook (DnnMpxHook*);
void RemoveFinalHook (DnnMpxHook*);
};
extern UchBaseMultiplexer* UchMpx;
extern void UchOpen (UchBaseMultiplexer* = 0);
extern MPX_RES UchLoop ();
extern void UchStop ();
#endif /* UchMultiplexer_H_ */
|
