38 #ifndef __GECODE_SEARCH_PARALLEL_DFS_HH__
39 #define __GECODE_SEARCH_PARALLEL_DFS_HH__
43 namespace Gecode {
namespace Search {
namespace Parallel {
56 virtual void run(
void);
167 for (
unsigned int i=0;
i<engine().workers();
i++) {
168 unsigned long int r_d = 0ul;
169 if (
Space* s = engine().worker(
i)->steal(r_d)) {
Parallel depth-first search worker
Path path
Current path ins search tree.
void idle(void)
Report that worker is idle.
Worker * worker(unsigned int i) const
Provide access to worker i.
static void run(Runnable *r)
Construct a new thread and run r.
void acquire(void)
Acquire the mutex and possibly block.
void * ralloc(size_t s)
Allocate s bytes from heap.
virtual void run(void)
Start execution of worker.
void path(Home home, int offset, const IntVarArgs &x, IntVar s, IntVar e, IntConLevel icl)
Post propagator such that x forms a Hamiltonian path.
void block(void)
Block all workers.
void reset(unsigned int l)
Reset stack and set no-good depth limit to l.
void signal(void)
Signal the event.
void find(void)
Try to find some work.
Heap heap
The single global heap.
void release(void)
Release the mutex.
virtual NoGoods & nogoods(void)
Return no-goods.
Gecode::IntArgs i(4, 1, 2, 3, 4)
unsigned int d
Distance until next clone.
bool idle
Whether the worker is idle.
virtual void reset(Space *s)
Reset engine to restart at space s.
Space * cur
Current space being explored.
unsigned int workers(void) const
Return number of workers.
DFS(Space *s, const Options &o)
Initialize for space s with options o.
Support::Event e_search
Event for search (solution found, no more solutions, search stopped)
Parallel depth-first search engine
virtual Statistics statistics(void) const
Return statistics.
void solution(Space *s)
Report solution s.
No-goods recorded from restarts.
Parallel depth-first search worker
Parallel depth-first search engine
SpaceStatus status(StatusStatistics &stat=unused_status)
Query space status.
Support::DynamicQueue< Space *, Heap > solutions
Queue of solutions.
Engine & _engine
Reference to engine.
DFS & engine(void) const
Provide access to engine.
Worker ** _worker
Array of worker references.
virtual ~DFS(void)
Destructor.
bool signal(void) const
Whether search state changed such that signal is needed.
Support::Mutex m_search
Mutex for search.