diff options
Diffstat (limited to 'src/pathfinder/npf/queue.h')
| -rw-r--r-- | src/pathfinder/npf/queue.h | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/src/pathfinder/npf/queue.h b/src/pathfinder/npf/queue.h index 4a939b61d..2dc075b93 100644 --- a/src/pathfinder/npf/queue.h +++ b/src/pathfinder/npf/queue.h @@ -30,6 +30,10 @@ struct BinaryHeapNode { * http://www.policyalmanac.org/games/binaryHeaps.htm */ struct Queue { + static const int BINARY_HEAP_BLOCKSIZE; + static const int BINARY_HEAP_BLOCKSIZE_BITS; + static const int BINARY_HEAP_BLOCKSIZE_MASK; + void Init(uint max_size); bool Push(void *item, int priority); @@ -38,15 +42,23 @@ struct Queue { void Clear(bool free_values); void Free(bool free_values); + /** + * Get an element from the #elements. + * @param i Element to access (starts at offset \c 1). + * @return Value of the element. + */ + FORCEINLINE BinaryHeapNode &GetElement(uint i) + { + assert(i > 0); + return this->elements[(i - 1) >> BINARY_HEAP_BLOCKSIZE_BITS][(i - 1) & BINARY_HEAP_BLOCKSIZE_MASK]; + } + uint max_size; uint size; uint blocks; ///< The amount of blocks for which space is reserved in elements BinaryHeapNode **elements; }; -/* The amount of elements that will be malloc'd at a time */ -#define BINARY_HEAP_BLOCKSIZE_BITS 10 - /* * Hash |