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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/*
Copyright (C) 1998 Stefan Westerfeld <[email protected]>,
2002 Hans Meine <[email protected]>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __AUTOROUTER_H_
#define __AUTOROUTER_H_
// If you get into trouble with threading (random crashes), you can configure
// things with --disable-threading, which should fix everything by not using
// threads
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_LIBPTHREAD
#include <pthread.h>
#endif
#include <qptrlist.h>
#include <qvaluelist.h>
class PathInfo
{
public:
int x1, x2, y1, y2, cost, depth;
QString history;
int operator<(const PathInfo& x) const { return cost < x.cost; }
int operator==(const PathInfo& x) const { return cost == x.cost; }
};
typedef QValueList<PathInfo> PathQueue;
class ARCommand;
/**
* The AutoRouter uses threads, commands are passed as objects via
* AutoRouter::enqueue() to the routing thread.
*/
class AutoRouter
{
public:
enum { none=0,up=1,down=2,left=4,right=8,head=16,tail=32,solid=64 };
enum Direction { DIR_NONE=0, DIR_UP, DIR_DOWN, DIR_LEFT, DIR_RIGHT };
protected:
int width, height;
enum OwnerType { OWNER_UD=0, OWNER_LR=1 };
OwnerType ownerIndex[DIR_RIGHT + 1]; // index is of type Direction
long directionMask[DIR_RIGHT + 1]; // index is of type Direction
struct Field
{
long data;
long minCost;
long penalty;
long owner[2];
} **field, **completeField;
long newOwner; // next free owner ID
long currentOwner;
bool _needRedraw;
PathInfo bestGoalPath;
PathQueue pathlist[1024];
int numQueuedPaths;
// pseudo random table for fast "random" decisions
enum { PRSIZE = 16 };
long pseudoRandomDir[PRSIZE];
int nextPR;
void initPseudoRandom();
/****** thread stuff *****/
#ifdef HAVE_LIBPTHREAD
pthread_mutex_t mutex_sync;
pthread_mutex_t mutex_queue;
pthread_t route_thread;
#endif
QPtrList<ARCommand> command_queue;
bool thread_terminate_now;
/*************************/
void queuePath(const PathInfo &path);
void examinePath(const PathInfo &path);
public:
AutoRouter(int width, int height);
~AutoRouter();
// queries _needRedraw flag and deletes it
// (assuming that the client is smart and redraws when getting true ;)
bool needRedraw();
long get(int x, int y);
void getowners(int x, int y, long& ud_owner, long& lr_owner);
void enqueue(ARCommand *command);
// marks the entire field as unused
void clear();
// sets the
void set(int x1, int y1, int x2, int y2, long lt);
long connect(int x1, int y1, int x2, int y2, long owner);
//
void sync();
// the following functions are not for direct use; they're used
// for threading only
void thread_clear();
void thread_set(int x1, int y1, int x2, int y2, long lt);
void thread_connect(int x1, int y1, int x2, int y2, long owner);
void thread_sync();
void thread_command_loop();
};
/**
* The ARCommand classes are used to communicate with the routing
* thread, see AutoRouter::enqueue()
*/
class ARCommand
{
public:
virtual void execute(AutoRouter *autorouter) = 0;
// if a command is destructive (default: false), the command queue
// will be emptied before queuing this one, assuming it'll destroy
// results of all other commands anyway.
virtual bool isDestructive();
};
class ARClearCommand :public ARCommand
{
public:
void execute(AutoRouter *autorouter);
bool isDestructive();
};
class ARSyncCommand :public ARCommand
{
public:
void execute(AutoRouter *autorouter);
};
class ARConnectCommand :public ARCommand
{
int _x1, _y1, _x2, _y2;
long _owner;
public:
ARConnectCommand(int x1, int y1, int x2, int y2, long owner);
void execute(AutoRouter *autorouter);
};
class ARSetCommand :public ARCommand
{
private:
int _x1, _y1, _x2, _y2;
long _lt;
public:
ARSetCommand(int x1, int y1, int x2, int y2, long lt);
void execute(AutoRouter *autorouter);
};
#endif
|
