Parallel branch-and-bound engine More...
#include <bab.hh>
Classes | |
class | Worker |
Parallel branch-and-bound search worker More... | |
Public Member Functions | |
Worker * | worker (unsigned int i) const |
Provide access to worker i. More... | |
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const Options & | opt (void) const |
Provide access to search options. More... | |
unsigned int | workers (void) const |
Return number of workers. More... | |
Cmd | cmd (void) const |
Return current command. More... | |
void | block (void) |
Block all workers. More... | |
void | release (Cmd c) |
Release all workers. More... | |
void | wait (void) |
Ensure that worker waits. More... | |
void | ack_terminate (void) |
For worker to acknowledge termination command. More... | |
void | terminated (void) |
For worker to register termination. More... | |
void | wait_terminate (void) |
For worker to wait until termination is legal. More... | |
void | terminate (void) |
For engine to peform thread termination. More... | |
void | ack_reset_start (void) |
For worker to acknowledge start of reset cycle. More... | |
void | ack_reset_stop (void) |
For worker to acknowledge stop of reset cycle. More... | |
void | wait_reset (void) |
For worker to wait for all workers to reset. More... | |
void | idle (void) |
Report that worker is idle. More... | |
void | busy (void) |
Report that worker is busy. More... | |
void | stop (void) |
Report that worker has been stopped. More... | |
Engine (const Options &o) | |
Initialize with options o. More... | |
virtual Space * | next (void) |
Return next solution (NULL, if none exists or search has been stopped) More... | |
virtual bool | stopped (void) const |
Check whether engine has been stopped. More... | |
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virtual | ~Engine (void) |
Destructor. More... | |
Protected Attributes | |
Worker ** | _worker |
Array of worker references. More... | |
Space * | best |
Best solution so far. More... | |
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const Options | _opt |
Search options. More... | |
volatile Cmd | _cmd |
The current command. More... | |
Support::Mutex | _m_wait |
Mutex for forcing workers to wait. More... | |
Support::Mutex | _m_term |
Mutex for access to termination information. More... | |
volatile unsigned int | _n_term_not_ack |
Number of workers that have not yet acknowledged termination. More... | |
Support::Event | _e_term_ack |
Event for termination acknowledgment. More... | |
Support::Mutex | _m_wait_terminate |
Mutex for waiting for termination. More... | |
volatile unsigned int | _n_not_terminated |
Number of not yet terminated workers. More... | |
Support::Event | _e_terminate |
Event for termination (all threads have terminated) More... | |
Support::Mutex | _m_reset |
Mutex for access to reset information. More... | |
volatile unsigned int | _n_reset_not_ack |
Number of workers that have not yet acknowledged reset. More... | |
Support::Event | e_reset_ack_start |
Event for reset acknowledgment started. More... | |
Support::Event | e_reset_ack_stop |
Event for reset acknowledgment stopped. More... | |
Support::Mutex | m_wait_reset |
Mutex for waiting for reset. More... | |
Support::Mutex | m_search |
Mutex for search. More... | |
Support::Event | e_search |
Event for search (solution found, no more solutions, search stopped) More... | |
Support::DynamicQueue< Space *, Heap > | solutions |
Queue of solutions. More... | |
volatile unsigned int | n_busy |
Number of busy workers. More... | |
volatile bool | has_stopped |
Whether a worker had been stopped. More... | |
Search control | |
void | solution (Space *s) |
Report solution s. More... | |
Engine interface | |
BAB (Space *s, const Options &o) | |
Initialize for space s with options o. More... | |
virtual Statistics | statistics (void) const |
Return statistics. More... | |
virtual void | reset (Space *s) |
Reset engine to restart at space s. More... | |
virtual NoGoods & | nogoods (void) |
Return no-goods. More... | |
virtual | ~BAB (void) |
Destructor. More... | |
Additional Inherited Members | |
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enum | Cmd { C_WORK, C_WAIT, C_RESET, C_TERMINATE } |
Commands from engine to workers. More... | |
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bool | signal (void) const |
Whether search state changed such that signal is needed. More... | |
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Reset engine to restart at space s.
Implements Gecode::Search::Engine.
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