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
|
/* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
* Copyright (c) Xerox Corporation 1997. All rights reserved.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linking this file statically or dynamically with other modules is making
* a combined work based on this file. Thus, the terms and conditions of
* the GNU General Public License cover the whole combination.
*
* In addition, as a special exception, the copyright holders of this file
* give you permission to combine this file with free software programs or
* libraries that are released under the GNU LGPL and with code included in
* the standard release of ns-2 under the Apache 2.0 license or under
* otherwise-compatible licenses with advertising requirements (or modified
* versions of such code, with unchanged license). You may copy and
* distribute such a system following the terms of the GNU GPL for this
* file and the licenses of the other code concerned, provided that you
* include the source code of that other code when and as the GNU GPL
* requires distribution of source code.
*
* Note that people who make modified versions of this file are not
* obligated to grant this special exception for their modified versions;
* it is their choice whether to do so. The GNU General Public License
* gives permission to release a modified version without this exception;
* this exception also makes it possible to release a modified version
* which carries forward this exception.
*/
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /cvsroot/nsnam/ns-2/adc/param-adc.cc,v 1.4 2005/08/26 05:05:27 tomh Exp $";
#endif
/* Parameter-based admission control. Admission decisions are
* based on the sum of reserved rates.
*/
#include "adc.h"
#include <stdlib.h>
class Param_ADC : public ADC {
public:
Param_ADC();
void teardown_action(int,double,int);
void rej_action(int,double,int);
void trace(TracedVar* v);
protected:
int admit_flow(int,double,int);
double utilization_;
TracedDouble resv_rate_;
double oresv_rate_;
};
Param_ADC::Param_ADC() : resv_rate_(0), oresv_rate_(0)
{
bind("utilization_",&utilization_);
type_ = new char[5];
strcpy(type_, "PBAC");
resv_rate_.tracer(this);
resv_rate_.name("\"Reserved Rate\"");
}
void Param_ADC::rej_action(int /*cl*/,double p,int /*r*/)
{
resv_rate_-=p;
}
void Param_ADC::teardown_action(int /*cl*/,double p,int /*r*/)
{
resv_rate_-=p;
}
int Param_ADC::admit_flow(int /*cl*/,double r,int /*b*/)
{
if (resv_rate_ + r <= utilization_ * bandwidth_) {
resv_rate_ +=r;
return 1;
}
return 0;
}
static class Param_ADCClass : public TclClass {
public:
Param_ADCClass() : TclClass("ADC/Param") {}
TclObject* create(int,const char*const*) {
return (new Param_ADC());
}
}class_param_adc;
void Param_ADC::trace(TracedVar* v)
{
char wrk[500];
double *p, newval;
/* check for right variable */
if (strcmp(v->name(), "\"Reserved Rate\"") == 0) {
p = &oresv_rate_;
}
else {
fprintf(stderr, "PBAC: unknown trace var %s\n", v->name());
return;
}
newval = double(*((TracedDouble*)v));
if (tchan_) {
int n;
double t = Scheduler::instance().clock();
/* f -t 0.0 -s 1 -a SA -T v -n Num -v 0 -o 0 */
sprintf(wrk, "f -t %g -s %d -a %s:%d-%d -T v -n %s -v %g -o %g",
t, src_, type_, src_, dst_, v->name(), newval, *p);
n = strlen(wrk);
wrk[n] = '\n';
wrk[n+1] = 0;
(void)Tcl_Write(tchan_, wrk, n+1);
}
*p = newval;
return;
}
|
