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nodesel.h
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1/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2/* */
3/* This file is part of the program and library */
4/* SCIP --- Solving Constraint Integer Programs */
5/* */
6/* Copyright (c) 2002-2023 Zuse Institute Berlin (ZIB) */
7/* */
8/* Licensed under the Apache License, Version 2.0 (the "License"); */
9/* you may not use this file except in compliance with the License. */
10/* You may obtain a copy of the License at */
11/* */
12/* http://www.apache.org/licenses/LICENSE-2.0 */
13/* */
14/* Unless required by applicable law or agreed to in writing, software */
15/* distributed under the License is distributed on an "AS IS" BASIS, */
16/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
17/* See the License for the specific language governing permissions and */
18/* limitations under the License. */
19/* */
20/* You should have received a copy of the Apache-2.0 license */
21/* along with SCIP; see the file LICENSE. If not visit scipopt.org. */
22/* */
23/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
24
25/**@file nodesel.h
26 * @ingroup INTERNALAPI
27 * @brief internal methods for node selectors and node priority queues
28 * @author Tobias Achterberg
29 */
30
31/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
32
33#ifndef __SCIP_NODESEL_H__
34#define __SCIP_NODESEL_H__
35
36
37#include "scip/def.h"
39#include "scip/type_event.h"
40#include "scip/type_retcode.h"
41#include "scip/type_set.h"
42#include "scip/type_stat.h"
43#include "scip/type_lp.h"
44#include "scip/type_tree.h"
45#include "scip/type_reopt.h"
46#include "scip/pub_nodesel.h"
47
48#ifdef __cplusplus
49extern "C" {
50#endif
51
52/*
53 * node priority queue methods
54 */
55
56/** creates node priority queue */
58 SCIP_NODEPQ** nodepq, /**< pointer to a node priority queue */
59 SCIP_SET* set, /**< global SCIP settings */
60 SCIP_NODESEL* nodesel /**< node selector to use for sorting the nodes in the queue */
61 );
62
63/** frees node priority queue, but not the data nodes themselves */
65 SCIP_NODEPQ** nodepq /**< pointer to a node priority queue */
66 );
67
68/** frees node priority queue and all nodes in the queue */
70 SCIP_NODEPQ** nodepq, /**< pointer to a node priority queue */
71 BMS_BLKMEM* blkmem, /**< block memory buffers */
72 SCIP_SET* set, /**< global SCIP settings */
73 SCIP_STAT* stat, /**< problem statistics */
74 SCIP_EVENTFILTER* eventfilter, /**< event filter for global (not variable dependent) events */
75 SCIP_EVENTQUEUE* eventqueue, /**< event queue */
76 SCIP_TREE* tree, /**< branch and bound tree */
77 SCIP_LP* lp /**< current LP data */
78 );
79
80/** deletes all nodes in the node priority queue */
82 SCIP_NODEPQ* nodepq, /**< node priority queue */
83 BMS_BLKMEM* blkmem, /**< block memory buffers */
84 SCIP_SET* set, /**< global SCIP settings */
85 SCIP_STAT* stat, /**< problem statistics */
86 SCIP_EVENTFILTER* eventfilter, /**< event filter for global (not variable dependent) events */
87 SCIP_EVENTQUEUE* eventqueue, /**< event queue */
88 SCIP_TREE* tree, /**< branch and bound tree */
89 SCIP_LP* lp /**< current LP data */
90 );
91
92/** returns the node selector associated with the given node priority queue */
94 SCIP_NODEPQ* nodepq /**< node priority queue */
95 );
96
97/** sets the node selector used for sorting the nodes in the queue, and resorts the queue if necessary */
99 SCIP_NODEPQ** nodepq, /**< pointer to a node priority queue */
100 SCIP_SET* set, /**< global SCIP settings */
101 SCIP_NODESEL* nodesel /**< node selector to use for sorting the nodes in the queue */
102 );
103
104/** compares two nodes; returns -1/0/+1 if node1 better/equal/worse than node2 */
106 SCIP_NODEPQ* nodepq, /**< node priority queue */
107 SCIP_SET* set, /**< global SCIP settings */
108 SCIP_NODE* node1, /**< first node to compare */
109 SCIP_NODE* node2 /**< second node to compare */
110 );
111
112/** inserts node into node priority queue */
114 SCIP_NODEPQ* nodepq, /**< node priority queue */
115 SCIP_SET* set, /**< global SCIP settings */
116 SCIP_NODE* node /**< node to be inserted */
117 );
118
119/** removes node from the node priority queue */
121 SCIP_NODEPQ* nodepq, /**< node priority queue */
122 SCIP_SET* set, /**< global SCIP settings */
123 SCIP_NODE* node /**< node to remove */
124 );
125
126/** returns the best node of the queue without removing it */
128 const SCIP_NODEPQ* nodepq /**< node priority queue */
129 );
130
131/** returns the nodes array of the queue */
133 const SCIP_NODEPQ* nodepq /**< node priority queue */
134 );
135
136/** returns the number of nodes stored in the node priority queue */
137int SCIPnodepqLen(
138 const SCIP_NODEPQ* nodepq /**< node priority queue */
139 );
140
141/** gets the minimal lower bound of all nodes in the queue */
143 SCIP_NODEPQ* nodepq, /**< node priority queue */
144 SCIP_SET* set /**< global SCIP settings */
145 );
146
147/** gets the node with minimal lower bound of all nodes in the queue */
149 SCIP_NODEPQ* nodepq, /**< node priority queue */
150 SCIP_SET* set /**< global SCIP settings */
151 );
152
153/** gets the sum of lower bounds of all nodes in the queue */
155 SCIP_NODEPQ* nodepq /**< node priority queue */
156 );
157
158/** free all nodes from the queue that are cut off by the given upper bound */
160 SCIP_NODEPQ* nodepq, /**< node priority queue */
161 BMS_BLKMEM* blkmem, /**< block memory buffer */
162 SCIP_SET* set, /**< global SCIP settings */
163 SCIP_STAT* stat, /**< dynamic problem statistics */
164 SCIP_EVENTFILTER* eventfilter, /**< event filter for global (not variable dependent) events */
165 SCIP_EVENTQUEUE* eventqueue, /**< event queue */
166 SCIP_TREE* tree, /**< branch and bound tree */
167 SCIP_REOPT* reopt, /**< reoptimization data structure */
168 SCIP_LP* lp, /**< current LP data */
169 SCIP_Real cutoffbound /**< cutoff bound: all nodes with lowerbound >= cutoffbound are cut off */
170 );
171
172
173
174
175/*
176 * node selector methods
177 */
178
179/** copies the given node selector to a new scip */
181 SCIP_NODESEL* nodesel, /**< node selector */
182 SCIP_SET* set /**< SCIP_SET of SCIP to copy to */
183 );
184
185/** creates a node selector */
187 SCIP_NODESEL** nodesel, /**< pointer to store node selector */
188 SCIP_SET* set, /**< global SCIP settings */
189 SCIP_MESSAGEHDLR* messagehdlr, /**< message handler */
190 BMS_BLKMEM* blkmem, /**< block memory for parameter settings */
191 const char* name, /**< name of node selector */
192 const char* desc, /**< description of node selector */
193 int stdpriority, /**< priority of the node selector in standard mode */
194 int memsavepriority, /**< priority of the node selector in memory saving mode */
195 SCIP_DECL_NODESELCOPY ((*nodeselcopy)), /**< copy method of node selector or NULL if you don't want to copy your plugin into sub-SCIPs */
196 SCIP_DECL_NODESELFREE ((*nodeselfree)), /**< destructor of node selector */
197 SCIP_DECL_NODESELINIT ((*nodeselinit)), /**< initialize node selector */
198 SCIP_DECL_NODESELEXIT ((*nodeselexit)), /**< deinitialize node selector */
199 SCIP_DECL_NODESELINITSOL((*nodeselinitsol)),/**< solving process initialization method of node selector */
200 SCIP_DECL_NODESELEXITSOL((*nodeselexitsol)),/**< solving process deinitialization method of node selector */
201 SCIP_DECL_NODESELSELECT((*nodeselselect)),/**< node selection method */
202 SCIP_DECL_NODESELCOMP ((*nodeselcomp)), /**< node comparison method */
203 SCIP_NODESELDATA* nodeseldata /**< node selector data */
204 );
205
206/** frees memory of node selector */
208 SCIP_NODESEL** nodesel, /**< pointer to node selector data structure */
209 SCIP_SET* set /**< global SCIP settings */
210 );
211
212/** initializes node selector */
214 SCIP_NODESEL* nodesel, /**< node selector */
215 SCIP_SET* set /**< global SCIP settings */
216 );
217
218/** deinitializes node selector */
220 SCIP_NODESEL* nodesel, /**< node selector */
221 SCIP_SET* set /**< global SCIP settings */
222 );
223
224/** informs node selector that the branch and bound process is being started */
226 SCIP_NODESEL* nodesel, /**< node selector */
227 SCIP_SET* set /**< global SCIP settings */
228 );
229
230/** informs node selector that the branch and bound process data is being freed */
232 SCIP_NODESEL* nodesel, /**< node selector */
233 SCIP_SET* set /**< global SCIP settings */
234 );
235
236/** select next node to be processed */
238 SCIP_NODESEL* nodesel, /**< node selector */
239 SCIP_SET* set, /**< global SCIP settings */
240 SCIP_NODE** selnode /**< pointer to store node to be processed next */
241 );
242
243/** compares two nodes; returns -1/0/+1 if node1 better/equal/worse than node2 */
245 SCIP_NODESEL* nodesel, /**< node selector */
246 SCIP_SET* set, /**< global SCIP settings */
247 SCIP_NODE* node1, /**< first node to compare */
248 SCIP_NODE* node2 /**< second node to compare */
249 );
250
251/** sets priority of node selector in standard mode */
253 SCIP_NODESEL* nodesel, /**< node selector */
254 SCIP_SET* set, /**< global SCIP settings */
255 int priority /**< new priority of the node selector */
256 );
257
258/** sets priority of node selector in memory saving mode */
260 SCIP_NODESEL* nodesel, /**< node selector */
261 SCIP_SET* set, /**< global SCIP settings */
262 int priority /**< new priority of the node selector */
263 );
264
265/** sets copy method of node selector */
267 SCIP_NODESEL* nodesel, /**< node selector */
268 SCIP_DECL_NODESELCOPY ((*nodeselcopy)) /**< copy method of node selector or NULL if you don't want to copy your plugin into sub-SCIPs */
269 );
270
271/** sets destructor method of node selector */
273 SCIP_NODESEL* nodesel, /**< node selector */
274 SCIP_DECL_NODESELFREE ((*nodeselfree)) /**< destructor of node selector */
275 );
276
277/** sets initialization method of node selector */
279 SCIP_NODESEL* nodesel, /**< node selector */
280 SCIP_DECL_NODESELINIT ((*nodeselinit)) /**< initialize node selector */
281 );
282
283/** sets deinitialization method of node selector */
285 SCIP_NODESEL* nodesel, /**< node selector */
286 SCIP_DECL_NODESELEXIT ((*nodeselexit)) /**< deinitialize node selector */
287 );
288
289/** sets solving process initialization method of node selector */
291 SCIP_NODESEL* nodesel, /**< node selector */
292 SCIP_DECL_NODESELINITSOL ((*nodeselinitsol))/**< solving process initialization method of node selector */
293 );
294
295/** sets solving process deinitialization method of node selector */
297 SCIP_NODESEL* nodesel, /**< node selector */
298 SCIP_DECL_NODESELEXITSOL ((*nodeselexitsol))/**< solving process deinitialization method of node selector */
299 );
300
301/** enables or disables all clocks of \p nodesel, depending on the value of the flag */
303 SCIP_NODESEL* nodesel, /**< the node selector for which all clocks should be enabled or disabled */
304 SCIP_Bool enable /**< should the clocks of the node selector be enabled? */
305 );
306
307#ifdef __cplusplus
308}
309#endif
310
311#endif
common defines and data types used in all packages of SCIP
memory allocation routines
struct BMS_BlkMem BMS_BLKMEM
Definition memory.h:439
SCIP_Real SCIPnodepqGetLowerbound(SCIP_NODEPQ *nodepq, SCIP_SET *set)
Definition nodesel.c:582
void SCIPnodeselSetExit(SCIP_NODESEL *nodesel,)
Definition nodesel.c:1176
void SCIPnodeselSetInit(SCIP_NODESEL *nodesel,)
Definition nodesel.c:1165
int SCIPnodepqLen(const SCIP_NODEPQ *nodepq)
Definition nodesel.c:571
void SCIPnodeselSetCopy(SCIP_NODESEL *nodesel,)
Definition nodesel.c:1143
void SCIPnodeselSetFree(SCIP_NODESEL *nodesel,)
Definition nodesel.c:1154
void SCIPnodeselSetInitsol(SCIP_NODESEL *nodesel,)
Definition nodesel.c:1187
void SCIPnodepqDestroy(SCIP_NODEPQ **nodepq)
Definition nodesel.c:127
SCIP_RETCODE SCIPnodepqRemove(SCIP_NODEPQ *nodepq, SCIP_SET *set, SCIP_NODE *node)
Definition nodesel.c:524
SCIP_RETCODE SCIPnodeselExit(SCIP_NODESEL *nodesel, SCIP_SET *set)
Definition nodesel.c:934
void SCIPnodeselEnableOrDisableClocks(SCIP_NODESEL *nodesel, SCIP_Bool enable)
Definition nodesel.c:1219
int SCIPnodeselCompare(SCIP_NODESEL *nodesel, SCIP_SET *set, SCIP_NODE *node1, SCIP_NODE *node2)
Definition nodesel.c:1035
SCIP_RETCODE SCIPnodeselCreate(SCIP_NODESEL **nodesel, SCIP_SET *set, SCIP_MESSAGEHDLR *messagehdlr, BMS_BLKMEM *blkmem, const char *name, const char *desc, int stdpriority, int memsavepriority, SCIP_DECL_NODESELCOPY((*nodeselcopy)), SCIP_DECL_NODESELFREE((*nodeselfree)), SCIP_DECL_NODESELINIT((*nodeselinit)), SCIP_DECL_NODESELEXIT((*nodeselexit)), SCIP_DECL_NODESELINITSOL((*nodeselinitsol)), SCIP_DECL_NODESELEXITSOL((*nodeselexitsol)), SCIP_DECL_NODESELSELECT((*nodeselselect)), SCIP_DECL_NODESELCOMP((*nodeselcomp)), SCIP_NODESELDATA *nodeseldata)
Definition nodesel.c:835
SCIP_RETCODE SCIPnodepqFree(SCIP_NODEPQ **nodepq, BMS_BLKMEM *blkmem, SCIP_SET *set, SCIP_STAT *stat, SCIP_EVENTFILTER *eventfilter, SCIP_EVENTQUEUE *eventqueue, SCIP_TREE *tree, SCIP_LP *lp)
Definition nodesel.c:141
SCIP_RETCODE SCIPnodepqBound(SCIP_NODEPQ *nodepq, BMS_BLKMEM *blkmem, SCIP_SET *set, SCIP_STAT *stat, SCIP_EVENTFILTER *eventfilter, SCIP_EVENTQUEUE *eventqueue, SCIP_TREE *tree, SCIP_REOPT *reopt, SCIP_LP *lp, SCIP_Real cutoffbound)
Definition nodesel.c:639
SCIP_RETCODE SCIPnodeselFree(SCIP_NODESEL **nodesel, SCIP_SET *set)
Definition nodesel.c:869
SCIP_RETCODE SCIPnodeselCopyInclude(SCIP_NODESEL *nodesel, SCIP_SET *set)
Definition nodesel.c:749
SCIP_RETCODE SCIPnodepqSetNodesel(SCIP_NODEPQ **nodepq, SCIP_SET *set, SCIP_NODESEL *nodesel)
Definition nodesel.c:216
SCIP_RETCODE SCIPnodeselExitsol(SCIP_NODESEL *nodesel, SCIP_SET *set)
Definition nodesel.c:988
void SCIPnodeselSetExitsol(SCIP_NODESEL *nodesel,)
Definition nodesel.c:1198
SCIP_RETCODE SCIPnodeselSelect(SCIP_NODESEL *nodesel, SCIP_SET *set, SCIP_NODE **selnode)
Definition nodesel.c:1012
void SCIPnodeselSetStdPriority(SCIP_NODESEL *nodesel, SCIP_SET *set, int priority)
Definition nodesel.c:1082
SCIP_RETCODE SCIPnodepqClear(SCIP_NODEPQ *nodepq, BMS_BLKMEM *blkmem, SCIP_SET *set, SCIP_STAT *stat, SCIP_EVENTFILTER *eventfilter, SCIP_EVENTQUEUE *eventqueue, SCIP_TREE *tree, SCIP_LP *lp)
Definition nodesel.c:165
SCIP_NODESEL * SCIPnodepqGetNodesel(SCIP_NODEPQ *nodepq)
Definition nodesel.c:206
SCIP_RETCODE SCIPnodepqInsert(SCIP_NODEPQ *nodepq, SCIP_SET *set, SCIP_NODE *node)
Definition nodesel.c:280
SCIP_NODE * SCIPnodepqFirst(const SCIP_NODEPQ *nodepq)
Definition nodesel.c:545
int SCIPnodepqCompare(SCIP_NODEPQ *nodepq, SCIP_SET *set, SCIP_NODE *node1, SCIP_NODE *node2)
Definition nodesel.c:264
SCIP_RETCODE SCIPnodepqCreate(SCIP_NODEPQ **nodepq, SCIP_SET *set, SCIP_NODESEL *nodesel)
Definition nodesel.c:105
SCIP_Real SCIPnodepqGetLowerboundSum(SCIP_NODEPQ *nodepq)
Definition nodesel.c:629
SCIP_RETCODE SCIPnodeselInitsol(SCIP_NODESEL *nodesel, SCIP_SET *set)
Definition nodesel.c:964
SCIP_NODE ** SCIPnodepqNodes(const SCIP_NODEPQ *nodepq)
Definition nodesel.c:561
SCIP_NODE * SCIPnodepqGetLowerboundNode(SCIP_NODEPQ *nodepq, SCIP_SET *set)
Definition nodesel.c:605
SCIP_RETCODE SCIPnodeselInit(SCIP_NODESEL *nodesel, SCIP_SET *set)
Definition nodesel.c:898
void SCIPnodeselSetMemsavePriority(SCIP_NODESEL *nodesel, SCIP_SET *set, int priority)
Definition nodesel.c:1106
public methods for node selectors
type definitions for managing events
type definitions for LP management
#define SCIP_DECL_NODESELEXIT(x)
#define SCIP_DECL_NODESELCOMP(x)
#define SCIP_DECL_NODESELINITSOL(x)
#define SCIP_DECL_NODESELCOPY(x)
#define SCIP_DECL_NODESELEXITSOL(x)
#define SCIP_DECL_NODESELINIT(x)
#define SCIP_DECL_NODESELSELECT(x)
#define SCIP_DECL_NODESELFREE(x)
struct SCIP_NodeselData SCIP_NODESELDATA
type definitions for collecting reoptimization information
type definitions for return codes for SCIP methods
enum SCIP_Retcode SCIP_RETCODE
type definitions for global SCIP settings
type definitions for problem statistics
type definitions for branch and bound tree