Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Services / Messaging / System / Messaging / Interop / Restrictions.cs / 1305376 / Restrictions.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Messaging.Interop { using System.Runtime.InteropServices; using System.Diagnostics; using System; using System.ComponentModel; using Microsoft.Win32; internal class Restrictions { private MQRESTRICTION restrictionStructure; public const int PRLT = 0; public const int PRLE = 1; public const int PRGT = 2; public const int PRGE = 3; public const int PREQ = 4; public const int PRNE = 5; public Restrictions(int maxRestrictions) { this.restrictionStructure = new MQRESTRICTION(maxRestrictions); } public virtual void AddGuid(int propertyId, int op, Guid value) { IntPtr data = Marshal.AllocHGlobal(16); Marshal.Copy(value.ToByteArray(), 0 , data, 16); this.AddItem(propertyId, op, MessagePropertyVariants.VT_CLSID, data); } public virtual void AddGuid(int propertyId, int op) { IntPtr data = Marshal.AllocHGlobal(16); this.AddItem(propertyId, op, MessagePropertyVariants.VT_CLSID, data); } private void AddItem(int id,int op, short vt, IntPtr data) { Marshal.WriteInt32(restrictionStructure.GetNextValidPtr(0) , op); Marshal.WriteInt32(restrictionStructure.GetNextValidPtr(4), id); Marshal.WriteInt16(restrictionStructure.GetNextValidPtr(8), vt); Marshal.WriteInt16(restrictionStructure.GetNextValidPtr(10), (short)0); Marshal.WriteInt16(restrictionStructure.GetNextValidPtr(12), (short)0); Marshal.WriteInt16(restrictionStructure.GetNextValidPtr(14), (short)0); Marshal.WriteIntPtr(restrictionStructure.GetNextValidPtr(16), data); Marshal.WriteIntPtr(restrictionStructure.GetNextValidPtr(16 + IntPtr.Size), (IntPtr)0); ++restrictionStructure.restrictionCount; } public virtual void AddI4(int propertyId, int op, int value) { this.AddItem(propertyId, op, MessagePropertyVariants.VT_I4, (IntPtr)value); } public virtual void AddString(int propertyId, int op, string value) { if (value == null) this.AddItem(propertyId, op, MessagePropertyVariants.VT_NULL, (IntPtr)0); else { IntPtr data = Marshal.StringToHGlobalUni(value); this.AddItem(propertyId, op, MessagePropertyVariants.VT_LPWSTR, data); } } public virtual MQRESTRICTION GetRestrictionsRef() { return this.restrictionStructure; } [StructLayout(LayoutKind.Sequential)] public class MQRESTRICTION { public int restrictionCount; [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Reliability", "CA2006:UseSafeHandleToEncapsulateNativeResources")] public IntPtr restrinctions; public MQRESTRICTION(int maxCount) { this.restrinctions = Marshal.AllocHGlobal(maxCount * GetRestrictionSize()); } ~MQRESTRICTION() { if (this.restrinctions != (IntPtr)0) { for (int index= 0; index < this.restrictionCount; ++ index) { short vt = Marshal.ReadInt16((IntPtr)((long)this.restrinctions + (index * GetRestrictionSize()) + 8)); if (vt != MessagePropertyVariants.VT_I4) { IntPtr dataPtr = (IntPtr)((long)this.restrinctions + (index * GetRestrictionSize()) + 16); IntPtr data = Marshal.ReadIntPtr(dataPtr); Marshal.FreeHGlobal(data); } } Marshal.FreeHGlobal(this.restrinctions); this.restrinctions = (IntPtr)0; } } public IntPtr GetNextValidPtr(int offset) { return (IntPtr)((long)restrinctions + restrictionCount * GetRestrictionSize() + offset); } public static int GetRestrictionSize() { return 16 + (IntPtr.Size * 2); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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