This file is indexed.

/usr/include/gecode/kernel/activity.hpp is in libgecode-dev 4.4.0-5.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2012
 *
 *  Last modified:
 *     $Date: 2013-07-27 00:49:48 +0200 (Sat, 27 Jul 2013) $ by $Author: tack $
 *     $Revision: 13949 $
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
 *  "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell copies of the Software, and to
 *  permit persons to whom the Software is furnished to do so, subject to
 *  the following conditions:
 *
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

namespace Gecode {

  /**
   * \brief Class for activity management
   *
   */
  class Activity {
  protected:
    template<class View>
    class Recorder;
    /// Object for storing activity values
    class Storage {
    public:
      /// Mutex to synchronize globally shared access
      Support::Mutex m;
      /// How many references exist for this object
      unsigned int use_cnt;
      /// Activity values
      double* a;
      /// Number of activity values
      int n;
      /// Decay factor
      double d;
      /// Allocate activity values
      template<class View>
      Storage(Home home, ViewArray<View>& x, double d,
              typename BranchTraits<typename View::VarType>::Merit bm);
      /// Delete object
      ~Storage(void);
      /// Allocate memory from heap
      static void* operator new(size_t s);
      /// Free memory allocated from heap
      static void  operator delete(void* p);
    };

    /// Pointer to storage object
    Storage* storage;
    /// Update activity value at position \a i
    void update(int i);
    /// Decay activity value at position \a i
    void decay(int i);
    /// Acquire mutex
    void acquire(void);
    /// Release mutex
    void release(void);
  public:
    /// \name Constructors and initialization
    //@{
    /**
     * \brief Construct as not yet intialized
     *
     * The only member functions that can be used on a constructed but not
     * yet initialized activity storage is init and the assignment operator.
     *
     */
    Activity(void);
    /// Copy constructor
    GECODE_KERNEL_EXPORT
    Activity(const Activity& a);
    /// Assignment operator
    GECODE_KERNEL_EXPORT
    Activity& operator =(const Activity& a);
    /// Initialize for views \a x and decay factor \a d and activity as defined by \a bm
    template<class View>
    Activity(Home home, ViewArray<View>& x, double d,
             typename BranchTraits<typename View::VarType>::Merit bm);
    /// Initialize for views \a x and decay factor \a d and activity as defined by \a bm
    template<class View>
    void init(Home home, ViewArray<View>& x, double d,
             typename BranchTraits<typename View::VarType>::Merit bm);
    /// Test whether already initialized
    bool initialized(void) const;
    /// Set activity to \a a
    GECODE_KERNEL_EXPORT
    void set(Space& home, double a=0.0);
    /// Default (empty) activity information
    GECODE_KERNEL_EXPORT static const Activity def;
    //@}

    /// \name Update and delete activity information
    //@{
    /// Updating during cloning
    GECODE_KERNEL_EXPORT
    void update(Space& home, bool share, Activity& a);
    /// Destructor
    GECODE_KERNEL_EXPORT
    ~Activity(void);
    //@}
    
    /// \name Information access
    //@{
    /// Return activity value at position \a i
    double operator [](int i) const;
    /// Return number of activity values
    int size(void) const;
    //@}

    /// \name Decay factor for aging
    //@{
    /// Set decay factor to \a d
    GECODE_KERNEL_EXPORT
    void decay(Space& home, double d);
    /// Return decay factor
    GECODE_KERNEL_EXPORT
    double decay(const Space& home) const;
    //@}
  };

  /// Propagator for recording activity information
  template<class View>
  class Activity::Recorder : public NaryPropagator<View,PC_GEN_NONE> {
  protected:
    using NaryPropagator<View,PC_GEN_NONE>::x;
    /// Advisor with index and change information
    class Idx : public Advisor {
    protected:
      /// Index and mark information
      int _info;
    public:
      /// Constructor for creation
      Idx(Space& home, Propagator& p, Council<Idx>& c, int i);
      /// Constructor for cloning \a a
      Idx(Space& home, bool share, Idx& a);
      /// Mark advisor as modified
      void mark(void);
      /// Mark advisor as unmodified
      void unmark(void);
      /// Whether advisor's view has been marked
      bool marked(void) const;
      /// Get index of view
      int idx(void) const;
    };
    /// Access to activity information
    Activity a;
    /// The advisor council
    Council<Idx> c;
    /// Constructor for cloning \a p
    Recorder(Space& home, bool share, Recorder<View>& p);
  public:
    /// Constructor for creation
    Recorder(Home home, ViewArray<View>& x, Activity& a);
    /// Copy propagator during cloning
    virtual Propagator* copy(Space& home, bool share);
    /// Cost function (crazy so that propagator is likely to run last)
    virtual PropCost cost(const Space& home, const ModEventDelta& med) const;
    /// Give advice to propagator
    virtual ExecStatus advise(Space& home, Advisor& a, const Delta& d);
    /// Perform propagation
    virtual ExecStatus propagate(Space& home, const ModEventDelta& med);
    /// Delete propagator and return its size
    virtual size_t dispose(Space& home);
    /// Post activity recorder propagator
    static ExecStatus post(Home home, ViewArray<View>& x, Activity& a);
  };
    
  /**
   * \brief Print activity values enclosed in curly brackets
   * \relates Activity
   */
  template<class Char, class Traits>
  std::basic_ostream<Char,Traits>&
  operator <<(std::basic_ostream<Char,Traits>& os,
             const Activity& a);


  /*
   * Advisor for activity recorder
   *
   */
  template<class View>
  forceinline
  Activity::Recorder<View>::Idx::Idx(Space& home, Propagator& p, 
                                     Council<Idx>& c, int i)
    : Advisor(home,p,c), _info(i << 1) {}
  template<class View>
  forceinline
  Activity::Recorder<View>::Idx::Idx(Space& home, bool share, Idx& a)
    : Advisor(home,share,a), _info(a._info) {
  }
  template<class View>
  forceinline void
  Activity::Recorder<View>::Idx::mark(void) {
    _info |= 1;
  }
  template<class View>
  forceinline void
  Activity::Recorder<View>::Idx::unmark(void) {
    _info &= ~1;
  }
  template<class View>
  forceinline bool
  Activity::Recorder<View>::Idx::marked(void) const {
    return (_info & 1) != 0;
  }
  template<class View>
  forceinline int
  Activity::Recorder<View>::Idx::idx(void) const {
    return _info >> 1;
  }



  /*
   * Posting of activity recorder propagator
   *
   */
  template<class View>
  forceinline
  Activity::Recorder<View>::Recorder(Home home, ViewArray<View>& x, 
                                     Activity& a0)
    : NaryPropagator<View,PC_GEN_NONE>(home,x), a(a0), c(home) {
    home.notice(*this,AP_DISPOSE);
    for (int i=x.size(); i--; )
      if (!x[i].assigned())
        x[i].subscribe(home,*new (home) Idx(home,*this,c,i));
  }

  template<class View>
  forceinline ExecStatus
  Activity::Recorder<View>::post(Home home, ViewArray<View>& x, 
                                 Activity& a) {
    (void) new (home) Recorder<View>(home,x,a);
    return ES_OK;
  }


  /*
   * Activity value storage
   *
   */
  forceinline void*
  Activity::Storage::operator new(size_t s) {
    return Gecode::heap.ralloc(s);
  }
  forceinline void
  Activity::Storage::operator delete(void* p) {
    Gecode::heap.rfree(p);
  }
  template<class View>
  forceinline
  Activity::Storage::Storage(Home home, ViewArray<View>& x, double d0,
                             typename 
                             BranchTraits<typename View::VarType>::Merit bm)
    : use_cnt(1), a(heap.alloc<double>(x.size())), n(x.size()), d(d0) {
    if (bm != NULL)
      for (int i=n; i--; ) {
        typename View::VarType xi(x[i].varimp());
        a[i] = bm(home,xi,i);
      }
    else
      for (int i=n; i--; )
        a[i] = 0.0;
  }
  forceinline
  Activity::Storage::~Storage(void) {
    heap.free<double>(a,n);
  }


  /*
   * Activity
   *
   */

  forceinline void
  Activity::update(int i) {
    assert(storage != NULL);
    assert((i >= 0) && (i < storage->n));
    storage->a[i] += 1.0;
  }
  forceinline void
  Activity::decay(int i) {
    assert(storage != NULL);
    assert((i >= 0) && (i < storage->n));
    storage->a[i] *= storage->d;
  }
  forceinline double
  Activity::operator [](int i) const {
    assert(storage != NULL);
    assert((i >= 0) && (i < storage->n));
    return storage->a[i];
  }
  forceinline int
  Activity::size(void) const {
    return storage->n;
  }
  forceinline void
  Activity::acquire(void) {
    storage->m.acquire();
  }
  forceinline void
  Activity::release(void) {
    storage->m.release();
  }


  forceinline
  Activity::Activity(void) : storage(NULL) {}

  forceinline bool
  Activity::initialized(void) const {
    return storage != NULL;
  }

  template<class View>
  forceinline
  Activity::Activity(Home home, ViewArray<View>& x, double d,
                     typename BranchTraits<typename View::VarType>::Merit bm) {
    assert(storage == NULL);
    storage = new Storage(home,x,d,bm);
    (void) Recorder<View>::post(home,x,*this);
  }
  template<class View>
  forceinline void
  Activity::init(Home home, ViewArray<View>& x, double d,
                 typename BranchTraits<typename View::VarType>::Merit bm) {
    assert(storage == NULL);
    storage = new Storage(home,x,d,bm);
    (void) Recorder<View>::post(home,x,*this);
  }

  template<class Char, class Traits>
  std::basic_ostream<Char,Traits>&
  operator <<(std::basic_ostream<Char,Traits>& os,
              const Activity& a) {
    std::basic_ostringstream<Char,Traits> s;
    s.copyfmt(os); s.width(0);
    s << '{';
    if (a.size() > 0) {
      s << a[0];
      for (int i=1; i<a.size(); i++)
        s << ", " << a[i];
    }
    s << '}';
    return os << s.str();
  }
  

  /*
   * Propagation for activity recorder
   *
   */
  template<class View>
  forceinline
  Activity::Recorder<View>::Recorder(Space& home, bool share,
                                     Recorder<View>& p) 
    : NaryPropagator<View,PC_GEN_NONE>(home,share,p) {
    a.update(home, share, p.a);
    c.update(home, share, p.c);
  }

  template<class View>
  Propagator*
  Activity::Recorder<View>::copy(Space& home, bool share) {
    return new (home) Recorder<View>(home, share, *this);
  }

  template<class View>
  inline size_t
  Activity::Recorder<View>::dispose(Space& home) {
    // Delete access to activity information
    home.ignore(*this,AP_DISPOSE);
    a.~Activity();
    // Cancel remaining advisors
    for (Advisors<Idx> as(c); as(); ++as)
      x[as.advisor().idx()].cancel(home,as.advisor());
    c.dispose(home);
    (void) NaryPropagator<View,PC_GEN_NONE>::dispose(home);
    return sizeof(*this);
  }

  template<class View>
  PropCost 
  Activity::Recorder<View>::cost(const Space&, const ModEventDelta&) const {
    return PropCost::crazy(PropCost::HI,1000);
  }

  template<class View>
  ExecStatus
  Activity::Recorder<View>::advise(Space&, Advisor& a, const Delta&) {
    static_cast<Idx&>(a).mark();
    return ES_NOFIX;
  }

  template<class View>
  ExecStatus
  Activity::Recorder<View>::propagate(Space& home, const ModEventDelta&) {
    // Lock activity information
    a.acquire();
    for (Advisors<Idx> as(c); as(); ++as) {
      int i = as.advisor().idx();
      if (as.advisor().marked()) {
        as.advisor().unmark();
        a.update(i);
        if (x[i].assigned())
          as.advisor().dispose(home,c);
      } else {
        assert(!x[i].assigned());
        a.decay(i);
      }
    }
    a.release();
    return c.empty() ? home.ES_SUBSUMED(*this) : ES_FIX;
  }
  
}

// STATISTICS: kernel-branch