| | | 1 | | // Licensed to the .NET Foundation under one or more agreements. |
| | | 2 | | // The .NET Foundation licenses this file to you under the MIT license. |
| | | 3 | | |
| | | 4 | | using System; |
| | | 5 | | using System.Buffers; |
| | | 6 | | using System.Diagnostics; |
| | | 7 | | using System.Runtime.InteropServices; |
| | | 8 | | using System.IO.Compression; |
| | | 9 | | |
| | | 10 | | namespace Microsoft.Win32.SafeHandles |
| | | 11 | | { |
| | | 12 | | internal sealed class SafeZstdCompressHandle : SafeHandle |
| | | 13 | | { |
| | | 14 | | internal SafeZstdCDictHandle? _dictionary; |
| | | 15 | | internal MemoryHandle? _prefixHandle; |
| | | 16 | | public SafeZstdCompressHandle() : base(IntPtr.Zero, true) { } |
| | | 17 | | |
| | | 18 | | protected override bool ReleaseHandle() |
| | | 19 | | { |
| | | 20 | | Interop.Zstd.ZSTD_freeCCtx(handle); |
| | | 21 | | |
| | | 22 | | // release the addref we took in SetDictionary |
| | | 23 | | _dictionary?.DangerousRelease(); |
| | | 24 | | |
| | | 25 | | if (_prefixHandle != null) |
| | | 26 | | { |
| | | 27 | | _prefixHandle.Value.Dispose(); |
| | | 28 | | _prefixHandle = null; |
| | | 29 | | } |
| | | 30 | | return true; |
| | | 31 | | } |
| | | 32 | | |
| | | 33 | | public void SetDictionary(SafeZstdCDictHandle dictionary) |
| | | 34 | | { |
| | | 35 | | Debug.Assert(_dictionary == null); |
| | | 36 | | Debug.Assert(dictionary != null); |
| | | 37 | | |
| | | 38 | | bool added = false; |
| | | 39 | | try |
| | | 40 | | { |
| | | 41 | | dictionary.DangerousAddRef(ref added); |
| | | 42 | | ZstandardUtils.ThrowIfError(Interop.Zstd.ZSTD_CCtx_refCDict(this, dictionary)); |
| | | 43 | | |
| | | 44 | | _dictionary = dictionary; |
| | | 45 | | } |
| | | 46 | | catch when (added) |
| | | 47 | | { |
| | | 48 | | dictionary.DangerousRelease(); |
| | | 49 | | throw; |
| | | 50 | | } |
| | | 51 | | } |
| | | 52 | | |
| | | 53 | | public unsafe nuint SetPrefix(ReadOnlyMemory<byte> prefix) |
| | | 54 | | { |
| | | 55 | | MemoryHandle handle = prefix.Pin(); |
| | | 56 | | |
| | | 57 | | nuint result = Interop.Zstd.ZSTD_CCtx_refPrefix(this, (byte*)handle.Pointer, (nuint)prefix.Length); |
| | | 58 | | |
| | | 59 | | if (Interop.Zstd.ZSTD_isError(result) != 0) |
| | | 60 | | { |
| | | 61 | | handle.Dispose(); |
| | | 62 | | } |
| | | 63 | | else |
| | | 64 | | { |
| | | 65 | | _prefixHandle?.Dispose(); |
| | | 66 | | _prefixHandle = handle; |
| | | 67 | | } |
| | | 68 | | |
| | | 69 | | return result; |
| | | 70 | | } |
| | | 71 | | |
| | | 72 | | public unsafe void Reset() |
| | | 73 | | { |
| | | 74 | | ZstandardUtils.ThrowIfError(Interop.Zstd.ZSTD_CCtx_reset(this, Interop.Zstd.ZstdResetDirective.ZSTD_reset_se |
| | | 75 | | |
| | | 76 | | // Restore the dictionary or clear the prefix before releasing its pinned memory. |
| | | 77 | | if (_prefixHandle != null) |
| | | 78 | | { |
| | | 79 | | nuint result = _dictionary is not null |
| | | 80 | | ? Interop.Zstd.ZSTD_CCtx_refCDict(this, _dictionary) |
| | | 81 | | : Interop.Zstd.ZSTD_CCtx_refPrefix(this, null, 0); |
| | | 82 | | ZstandardUtils.ThrowIfError(result); |
| | | 83 | | _prefixHandle.Value.Dispose(); |
| | | 84 | | _prefixHandle = null; |
| | | 85 | | } |
| | | 86 | | } |
| | | 87 | | |
| | | 88 | | public override bool IsInvalid => handle == IntPtr.Zero; |
| | | 89 | | } |
| | | 90 | | |
| | | 91 | | internal sealed class SafeZstdDecompressHandle : SafeHandle |
| | | 92 | | { |
| | | 93 | | internal SafeZstdDDictHandle? _dictionary; |
| | | 94 | | internal MemoryHandle? _prefixHandle; |
| | | 95 | | public SafeZstdDecompressHandle() : base(IntPtr.Zero, true) { } |
| | | 96 | | |
| | | 97 | | protected override bool ReleaseHandle() |
| | | 98 | | { |
| | | 99 | | Interop.Zstd.ZSTD_freeDCtx(handle); |
| | | 100 | | |
| | | 101 | | // release the addref we took in SetDictionary |
| | | 102 | | _dictionary?.DangerousRelease(); |
| | | 103 | | |
| | | 104 | | if (_prefixHandle != null) |
| | | 105 | | { |
| | | 106 | | _prefixHandle.Value.Dispose(); |
| | | 107 | | _prefixHandle = null; |
| | | 108 | | } |
| | | 109 | | return true; |
| | | 110 | | } |
| | | 111 | | |
| | | 112 | | public void SetDictionary(SafeZstdDDictHandle dictionary) |
| | | 113 | | { |
| | | 114 | | Debug.Assert(_dictionary == null); |
| | | 115 | | Debug.Assert(dictionary != null); |
| | | 116 | | |
| | | 117 | | bool added = false; |
| | | 118 | | try |
| | | 119 | | { |
| | | 120 | | dictionary.DangerousAddRef(ref added); |
| | | 121 | | ZstandardUtils.ThrowIfError(Interop.Zstd.ZSTD_DCtx_refDDict(this, dictionary)); |
| | | 122 | | |
| | | 123 | | _dictionary = dictionary; |
| | | 124 | | } |
| | | 125 | | catch when (added) |
| | | 126 | | { |
| | | 127 | | dictionary.DangerousRelease(); |
| | | 128 | | throw; |
| | | 129 | | } |
| | | 130 | | } |
| | | 131 | | |
| | | 132 | | public unsafe nuint SetPrefix(ReadOnlyMemory<byte> prefix) |
| | | 133 | | { |
| | | 134 | | MemoryHandle handle = prefix.Pin(); |
| | | 135 | | |
| | | 136 | | nuint result = Interop.Zstd.ZSTD_DCtx_refPrefix(this, (byte*)handle.Pointer, (nuint)prefix.Length); |
| | | 137 | | |
| | | 138 | | if (Interop.Zstd.ZSTD_isError(result) != 0) |
| | | 139 | | { |
| | | 140 | | handle.Dispose(); |
| | | 141 | | } |
| | | 142 | | else |
| | | 143 | | { |
| | | 144 | | _prefixHandle?.Dispose(); |
| | | 145 | | _prefixHandle = handle; |
| | | 146 | | } |
| | | 147 | | |
| | | 148 | | return result; |
| | | 149 | | } |
| | | 150 | | |
| | | 151 | | public unsafe void Reset() |
| | | 152 | | { |
| | | 153 | | ZstandardUtils.ThrowIfError(Interop.Zstd.ZSTD_DCtx_reset(this, Interop.Zstd.ZstdResetDirective.ZSTD_reset_se |
| | | 154 | | |
| | | 155 | | // Restore the dictionary or clear the prefix before releasing its pinned memory. |
| | | 156 | | if (_prefixHandle != null) |
| | | 157 | | { |
| | | 158 | | nuint result = _dictionary is not null |
| | | 159 | | ? Interop.Zstd.ZSTD_DCtx_refDDict(this, _dictionary) |
| | | 160 | | : Interop.Zstd.ZSTD_DCtx_refPrefix(this, null, 0); |
| | | 161 | | ZstandardUtils.ThrowIfError(result); |
| | | 162 | | _prefixHandle.Value.Dispose(); |
| | | 163 | | _prefixHandle = null; |
| | | 164 | | } |
| | | 165 | | } |
| | | 166 | | |
| | | 167 | | public override bool IsInvalid => handle == IntPtr.Zero; |
| | | 168 | | } |
| | | 169 | | |
| | | 170 | | internal sealed class SafeZstdCDictHandle : SafeHandle |
| | | 171 | | { |
| | | 172 | | public SafeZstdCDictHandle() : base(IntPtr.Zero, true) { } |
| | | 173 | | |
| | | 174 | | internal PinnedGCHandle<byte[]> _pinnedData; |
| | | 175 | | |
| | | 176 | | protected override bool ReleaseHandle() |
| | | 177 | | { |
| | | 178 | | Interop.Zstd.ZSTD_freeCDict(handle); |
| | | 179 | | _pinnedData.Dispose(); |
| | | 180 | | return true; |
| | | 181 | | } |
| | | 182 | | |
| | | 183 | | public override bool IsInvalid => handle == IntPtr.Zero; |
| | | 184 | | } |
| | | 185 | | |
| | | 186 | | internal sealed class SafeZstdDDictHandle : SafeHandle |
| | | 187 | | { |
| | 0 | 188 | | public SafeZstdDDictHandle() : base(IntPtr.Zero, true) { } |
| | | 189 | | |
| | | 190 | | internal PinnedGCHandle<byte[]> _pinnedData; |
| | | 191 | | |
| | | 192 | | protected override bool ReleaseHandle() |
| | 0 | 193 | | { |
| | 0 | 194 | | Interop.Zstd.ZSTD_freeDDict(handle); |
| | 0 | 195 | | _pinnedData.Dispose(); |
| | 0 | 196 | | return true; |
| | 0 | 197 | | } |
| | | 198 | | |
| | 0 | 199 | | public override bool IsInvalid => handle == IntPtr.Zero; |
| | | 200 | | } |
| | | 201 | | } |