1 /* Copyright (c) 2007 Eric Scott Albright
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to deal
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5 * in the Software without restriction, including without limitation the rights
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6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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7 * copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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23 using System.Runtime.ConstrainedExecution;
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24 using System.Runtime.InteropServices;
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28 internal sealed class SafeDictionaryHandle : SafeHandle
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30 private readonly SafeBrokerHandle _broker;
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32 public SafeDictionaryHandle(SafeBrokerHandle broker, IntPtr handle)
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33 : base(IntPtr.Zero, true)
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41 ///When overridden in a derived class, gets a value indicating whether the handle value is invalid.
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44 ///true if the handle is valid; otherwise, false.
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46 public override bool IsInvalid
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48 get { return (handle == IntPtr.Zero); }
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52 ///When overridden in a derived class, executes the code required to free the handle.
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55 ///true if the handle is released successfully; otherwise, in the event of a catastrophic failure, false. In this case, it generates a ReleaseHandleFailed Managed Debugging Assistant.
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57 [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
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58 protected override bool ReleaseHandle()
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60 // The finalizer may finalize the broker and the dictionaries in any order
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61 // leading to a case where the broker may have already been released and thus
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62 // already cleaned up all its owned dictionaries. If that is the case, we don't
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63 // need to clean up.
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64 if (_broker.IsClosed)
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66 Bindings.enchant_broker_free_dict(_broker, handle);
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