Programming search engines
[Functionality by programming task]
Collaboration diagram for Programming search engines:
|
Enumerations | |
| enum | Gecode::SpaceStatus { Gecode::SS_FAILED, Gecode::SS_SOLVED, Gecode::SS_BRANCH } |
| Space status More... | |
Functions | |
| SpaceStatus | Gecode::Space::status (unsigned long int &pn=unused_uli) |
| Query space status. | |
| const BranchingDesc * | Gecode::Space::description (void) const |
| Create new branching description for current branching. | |
| Space * | Gecode::Space::clone (bool share=true, unsigned long int &pn=unused_uli) |
| Clone space. | |
| void | Gecode::Space::commit (const BranchingDesc *d, unsigned int a) |
| Commit branching description d and for alternative a. | |
| void | Gecode::Space::flush (void) |
| Flush cache datastructures in actors. | |
Enumeration Type Documentation
|
|
Space status
|
Function Documentation
|
|
Query space status. Propagates the space until fixpoint or failure and increments pn by the number of propagator executions.
|
|
|
Create new branching description for current branching. This member function can only be called after the member function Space::status on the same space has been called and in between no non-const member function has been called on this space. Note that the above invariant obly pertains to calls of member functions of the same space. If the invariant is violated, the system is likely to crash (hopefully it does). In particular, if applied to a space with no current branching, the system will crash. |
|
||||||||||||
|
Clone space. Propagates the space until fixpoint and increments pn by the number of propagator executions. If propagation results in a failed space, an exception of type SpaceFailed is thrown. Otherwise, a clone of the space is returned. If shared is true, sharable datastructures are shared among the clone and the original space. If shared is false, independent copies of the shared datastructures must be created. This means that a clone with no sharing can be used in a different thread without any interaction with the original space. |
|
||||||||||||
|
Commit branching description d and for alternative a. The current branching in the space performs a commit from the information provided by the branching description d and the alternative a. Note that no propagation is perfomed (to support batch recomputation), in order to perform propagation the member function status must be used. Committing with branching descriptions must be carried out in the same order as the branch descriptions have been obtained by the member function Space::description(). It is perfectly okay to add constraints interleaved with branching descriptions (provided they are in the right order). However, if propagation is performed by calling the member function status and then new branching descriptions are computed, these branching descriptions are different. Committing throws the following exceptions:
|
|
|
Flush cache datastructures in actors. Flushes caches of actors in the space. This is useful to free memory (in particular when considering a space to be stored for later use such as during search). Even better is to make a clone of the space. |