
Parallel depth-first search engine More...
#include <dfs.hh>
Classes | |
| class | Worker |
| Parallel depth-first search worker More... | |
Public Member Functions | |
| Worker * | worker (unsigned int i) const |
| Provide access to worker i. More... | |
Public Member Functions inherited from Gecode::Search::Parallel::Engine | |
| 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... | |
Public Member Functions inherited from Gecode::Search::Engine | |
| virtual | ~Engine (void) |
| Destructor. More... | |
Protected Attributes | |
| Worker ** | _worker |
| Array of worker references. More... | |
Protected Attributes inherited from Gecode::Search::Parallel::Engine | |
| 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 | |
| DFS (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 | ~DFS (void) |
| Destructor. More... | |
Additional Inherited Members | |
Public Types inherited from Gecode::Search::Parallel::Engine | |
| enum | Cmd { C_WORK, C_WAIT, C_RESET, C_TERMINATE } |
| Commands from engine to workers. More... | |
Static Public Member Functions inherited from Gecode::Search::Engine | |
| static void * | operator new (size_t s) |
| Allocate memory from heap. More... | |
| static void | operator delete (void *p) |
| Free memory allocated from heap. More... | |
Protected Member Functions inherited from Gecode::Search::Parallel::Engine | |
| 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.
Reimplemented from Gecode::Search::Engine.
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