| 0,0 → 1,91 |
|---|
| |
| namespace GMap.NET.Internals |
| { |
| using System.Collections.Generic; |
| using System.IO; |
| using System; |
| using System.Diagnostics; |
| |
| /// <summary> |
| /// kiber speed memory cache for tiles with history support ;} |
| /// </summary> |
| internal class KiberTileCache : Dictionary<RawTile, byte[]> |
| { |
| public KiberTileCache() : base(new RawTileComparer()) |
| { |
| } |
| |
| readonly Queue<RawTile> Queue = new Queue<RawTile>(); |
| |
| /// <summary> |
| /// the amount of tiles in MB to keep in memmory, default: 22MB, if each ~100Kb it's ~222 tiles |
| /// </summary> |
| #if !PocketPC |
| public int MemoryCacheCapacity = 22; |
| #else |
| public int MemoryCacheCapacity = 3; |
| #endif |
| |
| long memoryCacheSize = 0; |
| |
| /// <summary> |
| /// current memmory cache size in MB |
| /// </summary> |
| public double MemoryCacheSize |
| { |
| get |
| { |
| return memoryCacheSize / 1048576.0; |
| } |
| } |
| |
| public new void Add(RawTile key, byte[] value) |
| { |
| Queue.Enqueue(key); |
| base.Add(key, value); |
| |
| memoryCacheSize += value.Length; |
| } |
| |
| // do not allow directly removal of elements |
| private new void Remove(RawTile key) |
| { |
| |
| } |
| |
| public new void Clear() |
| { |
| Queue.Clear(); |
| base.Clear(); |
| memoryCacheSize = 0; |
| } |
| |
| internal void RemoveMemoryOverload() |
| { |
| while(MemoryCacheSize > MemoryCacheCapacity) |
| { |
| if(Keys.Count > 0 && Queue.Count > 0) |
| { |
| RawTile first = Queue.Dequeue(); |
| try |
| { |
| var m = base[first]; |
| { |
| base.Remove(first); |
| memoryCacheSize -= m.Length; |
| } |
| m = null; |
| } |
| catch(Exception ex) |
| { |
| Debug.WriteLine("RemoveMemoryOverload: " + ex); |
| } |
| } |
| else |
| { |
| break; |
| } |
| } |
| } |
| } |
| } |