mcs/class/corlib/System.Threading/NativeEventCalls.cs

   1 //
   2 // System.Threading.AutoResetEvent.cs
   3 //
   4 // Author:
   5 //   Dick Porter (dick@ximian.com)
   6 //   Veronica De Santis (veron78@interfree.it)
   7 //
   8 // (C) Ximian, Inc.  http://www.ximian.com
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.Runtime.CompilerServices;
  36 using Microsoft.Win32.SafeHandles;
  37
  38 #if !MOBILE
  39 using System.Security.AccessControl;
  40 using System.IO;
  41 #endif
  42
  43 namespace System.Threading
  44 {
  45         internal static class NativeEventCalls
  46         {
  47                 public unsafe static IntPtr CreateEvent_internal (bool manual, bool initial, string name, out int errorCode)
  48                 {
  49                         // FIXME check for embedded nuls in name
  50                         fixed (char *fixed_name = name)
  51                                 return CreateEvent_icall (manual, initial, fixed_name, name?.Length ?? 0, out errorCode);
  52                 }
  53
  54                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  55                 private unsafe static extern IntPtr CreateEvent_icall (bool manual, bool initial, char *name, int name_length, out int errorCode);
  56
  57                 public static bool SetEvent (SafeWaitHandle handle)
  58                 {
  59                         bool release = false;
  60                         try {
  61                                 handle.DangerousAddRef (ref release);
  62                                 return SetEvent_internal (handle.DangerousGetHandle ());
  63                         } finally {
  64                                 if (release)
  65                                         handle.DangerousRelease ();
  66                         }
  67                 }
  68
  69                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  70                 static extern bool SetEvent_internal(IntPtr handle);
  71
  72                 public static bool ResetEvent (SafeWaitHandle handle)
  73                 {
  74                         bool release = false;
  75                         try {
  76                                 handle.DangerousAddRef (ref release);
  77                                 return ResetEvent_internal (handle.DangerousGetHandle ());
  78                         } finally {
  79                                 if (release)
  80                                         handle.DangerousRelease ();
  81                         }
  82                 }
  83
  84                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  85                 static extern bool ResetEvent_internal(IntPtr handle);
  86
  87                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  88                 public static extern void CloseEvent_internal (IntPtr handle);
  89
  90 #if !MOBILE
  91                 public unsafe static IntPtr OpenEvent_internal (string name, EventWaitHandleRights rights, out int errorCode)
  92                 {
  93                         // FIXME check for embedded nuls in name
  94                         fixed (char *fixed_name = name)
  95                                 return OpenEvent_icall (fixed_name, name?.Length ?? 0, rights, out errorCode);
  96                 }
  97
  98                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  99                 private unsafe static extern IntPtr OpenEvent_icall (char *name, int name_length, EventWaitHandleRights rights, out int errorCode);
 100 #endif
 101         }
 102 }