2 // System.Threading.Mutex.cs
5 // Dick Porter (dick@ximian.com)
6 // Veronica De Santis (veron78@interfree.it)
8 // (C) Ximian, Inc. http://www.ximian.com
9 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
11 // Permission is hereby granted, free of charge, to any person obtaining
12 // a copy of this software and associated documentation files (the
13 // "Software"), to deal in the Software without restriction, including
14 // without limitation the rights to use, copy, modify, merge, publish,
15 // distribute, sublicense, and/or sell copies of the Software, and to
16 // permit persons to whom the Software is furnished to do so, subject to
17 // the following conditions:
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 using System.Runtime.CompilerServices;
32 using System.Security.Permissions;
34 using System.Runtime.ConstrainedExecution;
36 using System.Runtime.InteropServices;
38 using System.Security.AccessControl;
41 namespace System.Threading
44 public sealed class Mutex : WaitHandle
46 [MethodImplAttribute(MethodImplOptions.InternalCall)]
47 private static extern IntPtr CreateMutex_internal(
52 [MethodImplAttribute(MethodImplOptions.InternalCall)]
53 private static extern bool ReleaseMutex_internal(IntPtr handle);
56 [MethodImplAttribute (MethodImplOptions.InternalCall)]
57 private static extern IntPtr OpenMutex_internal (string name, MutexRights rights, out MonoIOError error);
59 private Mutex (IntPtr handle)
65 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.MayFail)]
69 Handle=CreateMutex_internal(false, null, out created);
72 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.MayFail)]
73 public Mutex(bool initiallyOwned) {
76 Handle=CreateMutex_internal(initiallyOwned, null,
80 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.MayFail)]
81 [SecurityPermission (SecurityAction.LinkDemand, UnmanagedCode = true)]
82 public Mutex (bool initiallyOwned, string name)
85 Handle = CreateMutex_internal (initiallyOwned, name, out created);
88 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.MayFail)]
89 [SecurityPermission (SecurityAction.LinkDemand, UnmanagedCode = true)]
90 public Mutex (bool initiallyOwned, string name, out bool createdNew)
92 Handle = CreateMutex_internal (initiallyOwned, name, out createdNew);
96 [MonoTODO ("Use MutexSecurity in CreateMutex_internal")]
97 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.MayFail)]
98 public Mutex (bool initiallyOwned, string name, out bool createdNew, MutexSecurity mutexSecurity)
100 Handle = CreateMutex_internal (initiallyOwned, name, out createdNew);
103 public MutexSecurity GetAccessControl ()
105 return new MutexSecurity (SafeWaitHandle,
106 AccessControlSections.Owner |
107 AccessControlSections.Group |
108 AccessControlSections.Access);
111 public static Mutex OpenExisting (string name)
113 return(OpenExisting (name, MutexRights.Synchronize |
114 MutexRights.Modify));
117 public static Mutex OpenExisting (string name,
121 throw new ArgumentNullException ("name");
123 if ((name.Length == 0) ||
124 (name.Length > 260)) {
125 throw new ArgumentException ("name", Locale.GetText ("Invalid length [1-260]."));
129 IntPtr handle = OpenMutex_internal (name, rights,
131 if (handle == (IntPtr)null) {
132 if (error == MonoIOError.ERROR_FILE_NOT_FOUND) {
133 throw new WaitHandleCannotBeOpenedException (Locale.GetText ("Named Mutex handle does not exist: ") + name);
134 } else if (error == MonoIOError.ERROR_ACCESS_DENIED) {
135 throw new UnauthorizedAccessException ();
137 throw new IOException (Locale.GetText ("Win32 IO error: ") + error.ToString ());
141 return(new Mutex (handle));
145 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.MayFail)]
146 public void ReleaseMutex() {
147 bool success = ReleaseMutex_internal(Handle);
149 throw new ApplicationException ("Mutex is not owned");
154 public void SetAccessControl (MutexSecurity mutexSecurity)
156 if (null == mutexSecurity)
157 throw new ArgumentNullException ("mutexSecurity");
159 mutexSecurity.PersistModifications (SafeWaitHandle);