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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2498 | - | 1 | |
| 2 | namespace GMap.NET.CacheProviders |
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| 3 | { |
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| 4 | using System.Diagnostics; |
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| 5 | using GMap.NET.Internals; |
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| 6 | using System; |
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| 7 | |||
| 8 | public class MemoryCache : IDisposable |
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| 9 | { |
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| 10 | readonly KiberTileCache TilesInMemory = new KiberTileCache(); |
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| 11 | |||
| 12 | FastReaderWriterLock kiberCacheLock = new FastReaderWriterLock(); |
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| 13 | |||
| 14 | /// <summary> |
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| 15 | /// the amount of tiles in MB to keep in memmory, default: 22MB, if each ~100Kb it's ~222 tiles |
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| 16 | /// </summary> |
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| 17 | public int Capacity |
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| 18 | { |
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| 19 | get |
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| 20 | { |
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| 21 | kiberCacheLock.AcquireReaderLock(); |
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| 22 | try |
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| 23 | { |
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| 24 | return TilesInMemory.MemoryCacheCapacity; |
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| 25 | } |
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| 26 | finally |
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| 27 | { |
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| 28 | kiberCacheLock.ReleaseReaderLock(); |
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| 29 | } |
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| 30 | } |
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| 31 | set |
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| 32 | { |
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| 33 | kiberCacheLock.AcquireWriterLock(); |
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| 34 | try |
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| 35 | { |
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| 36 | TilesInMemory.MemoryCacheCapacity = value; |
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| 37 | } |
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| 38 | finally |
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| 39 | { |
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| 40 | kiberCacheLock.ReleaseWriterLock(); |
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| 41 | } |
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| 42 | } |
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| 43 | } |
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| 44 | |||
| 45 | /// <summary> |
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| 46 | /// current memmory cache size in MB |
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| 47 | /// </summary> |
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| 48 | public double Size |
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| 49 | { |
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| 50 | get |
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| 51 | { |
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| 52 | kiberCacheLock.AcquireReaderLock(); |
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| 53 | try |
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| 54 | { |
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| 55 | return TilesInMemory.MemoryCacheSize; |
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| 56 | } |
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| 57 | finally |
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| 58 | { |
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| 59 | kiberCacheLock.ReleaseReaderLock(); |
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| 60 | } |
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| 61 | } |
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| 62 | } |
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| 63 | |||
| 64 | public void Clear() |
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| 65 | { |
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| 66 | kiberCacheLock.AcquireWriterLock(); |
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| 67 | try |
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| 68 | { |
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| 69 | TilesInMemory.Clear(); |
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| 70 | } |
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| 71 | finally |
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| 72 | { |
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| 73 | kiberCacheLock.ReleaseWriterLock(); |
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| 74 | } |
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| 75 | } |
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| 76 | |||
| 77 | // ... |
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| 78 | |||
| 79 | internal byte[] GetTileFromMemoryCache(RawTile tile) |
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| 80 | { |
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| 81 | kiberCacheLock.AcquireReaderLock(); |
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| 82 | try |
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| 83 | { |
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| 84 | byte[] ret = null; |
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| 85 | if(TilesInMemory.TryGetValue(tile, out ret)) |
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| 86 | { |
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| 87 | return ret; |
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| 88 | } |
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| 89 | } |
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| 90 | finally |
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| 91 | { |
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| 92 | kiberCacheLock.ReleaseReaderLock(); |
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| 93 | } |
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| 94 | return null; |
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| 95 | } |
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| 96 | |||
| 97 | internal void AddTileToMemoryCache(RawTile tile, byte[] data) |
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| 98 | { |
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| 99 | if(data != null) |
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| 100 | { |
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| 101 | kiberCacheLock.AcquireWriterLock(); |
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| 102 | try |
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| 103 | { |
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| 104 | if(!TilesInMemory.ContainsKey(tile)) |
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| 105 | { |
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| 106 | TilesInMemory.Add(tile, data); |
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| 107 | } |
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| 108 | } |
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| 109 | finally |
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| 110 | { |
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| 111 | kiberCacheLock.ReleaseWriterLock(); |
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| 112 | } |
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| 113 | } |
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| 114 | #if DEBUG |
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| 115 | else |
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| 116 | { |
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| 117 | Debug.WriteLine("adding empty data to MemoryCache ;} "); |
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| 118 | if(Debugger.IsAttached) |
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| 119 | { |
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| 120 | Debugger.Break(); |
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| 121 | } |
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| 122 | } |
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| 123 | #endif |
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| 124 | } |
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| 125 | |||
| 126 | internal void RemoveOverload() |
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| 127 | { |
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| 128 | kiberCacheLock.AcquireWriterLock(); |
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| 129 | try |
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| 130 | { |
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| 131 | TilesInMemory.RemoveMemoryOverload(); |
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| 132 | } |
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| 133 | finally |
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| 134 | { |
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| 135 | kiberCacheLock.ReleaseWriterLock(); |
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| 136 | } |
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| 137 | } |
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| 138 | |||
| 139 | #region IDisposable Members |
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| 140 | |||
| 141 | ~MemoryCache() |
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| 142 | { |
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| 143 | Dispose(false); |
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| 144 | } |
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| 145 | |||
| 146 | void Dispose(bool disposing) |
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| 147 | { |
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| 148 | if(kiberCacheLock != null) |
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| 149 | { |
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| 150 | if(disposing) |
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| 151 | { |
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| 152 | Clear(); |
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| 153 | } |
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| 154 | |||
| 155 | kiberCacheLock.Dispose(); |
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| 156 | kiberCacheLock = null; |
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| 157 | } |
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| 158 | } |
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| 159 | |||
| 160 | public void Dispose() |
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| 161 | { |
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| 162 | this.Dispose(true); |
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| 163 | GC.SuppressFinalize(this); |
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| 164 | } |
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| 165 | |||
| 166 | #endregion |
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| 167 | } |
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| 168 | } |