System.WeakReference
using System.Security.Permissions;
using System.Runtime.InteropServices;
namespace System
{
[Serializable,ComVisible(true)]
[SecurityPermissionAttribute(SecurityAction.InheritanceDemand,Flags=SecurityPermissionFlag.UnmanagedCode)]
public class WeakReference:System.Object,System.Runtime.Serialization.ISerializable
{
internal volatile System.IntPtr m_handle;
internal bool m_IsLongReference;
public WeakReference(object target):this(target,false)
{
//.maxstack 8
//IL_0000: ldarg.0
//IL_0001: ldarg.1
//IL_0002: ldc.i4.0
//IL_0003: call instance void System.WeakReference::.ctor(object,
//bool)
//IL_0008: ret
}
public WeakReference(object target,bool trackResurrection):base()
{
//.maxstack 8
//IL_0000: ldarg.0
//IL_0001: call instance void System.Object::.ctor()
//IL_0006: ldarg.0
//IL_0007: ldarg.2
//IL_0008: stfld bool System.WeakReference::m_IsLongReference
//IL_000d: ldarg.0
//IL_000e: ldarg.1
//IL_000f: ldarg.2
//IL_0010: brtrue.s IL_0015
//IL_0012: ldc.i4.0
//IL_0013: br.s IL_0016
//IL_0015: ldc.i4.1
//IL_0016: call native int System.Runtime.InteropServices.GCHandle::InternalAlloc(object,
//valuetype System.Runtime.InteropServices.GCHandleType)
//IL_001b: volatile.
//IL_001d: stfld native int modreq(System.Runtime.CompilerServices.IsVolatile) System.WeakReference::m_handle
//IL_0022: ret
this.m_IsLongReference=trackResurrection;
if(trackResurrection)
{
this.m_handle=GCHandle.InternalAlloc(target,GCHandleType.WeakTrackResurrection);
}
else
{
this.m_handle=GCHandle.InternalAlloc(target,GCHandleType.Weak);
}
}
protected WeakReference(System.Runtime.Serialization.SerializationInfo info,System.Runtime.Serialization.StreamingContext context):base()
{
//.maxstack 4
//.locals init (object V_0)
//IL_0000: ldarg.0
//IL_0001: call instance void System.Object::.ctor()
//IL_0006: ldarg.1
//IL_0007: brtrue.s IL_0014
//IL_0009: ldstr "info"
//IL_000e: newobj instance void System.ArgumentNullException::.ctor(string)
//IL_0013: throw
//IL_0014: ldarg.1
//IL_0015: ldstr "TrackedObject"
//IL_001a: ldtoken System.Object
//IL_001f: call class System.Type System.Type::GetTypeFromHandle(valuetype System.RuntimeTypeHandle)
//IL_0024: callvirt instance object System.Runtime.Serialization.SerializationInfo::GetValue(string,
//class System.Type)
//IL_0029: stloc.0
//IL_002a: ldarg.0
//IL_002b: ldarg.1
//IL_002c: ldstr "TrackResurrection"
//IL_0031: callvirt instance bool System.Runtime.Serialization.SerializationInfo::GetBoolean(string)
//IL_0036: stfld bool System.WeakReference::m_IsLongReference
//IL_003b: ldarg.0
//IL_003c: ldloc.0
//IL_003d: ldarg.0
//IL_003e: ldfld bool System.WeakReference::m_IsLongReference
//IL_0043: brtrue.s IL_0048
//IL_0045: ldc.i4.0
//IL_0046: br.s IL_0049
//IL_0048: ldc.i4.1
//IL_0049: call native int System.Runtime.InteropServices.GCHandle::InternalAlloc(object,
//valuetype System.Runtime.InteropServices.GCHandleType)
//IL_004e: volatile.
//IL_0050: stfld native int modreq(System.Runtime.CompilerServices.IsVolatile) System.WeakReference::m_handle
//IL_0055: ret
object V_0;
if(info==null)
{
throw new System.ArgumentNullException("info");
}
else
{
V_0=info.GetValue("TrackedObject",typeof(object));
//IL_002a
this.m_IsLongReference=info.GetBoolean("TrackResurrection");
if(this.m_IsLongReference)
{
this.m_handle=GCHandle.InternalAlloc(V_0,GCHandleType.WeakTrackResurrection);
}
else
{
this.m_handle=GCHandle.InternalAlloc(V_0,GCHandleType.Weak);
}
}
}
public new virtual bool IsAlive
{
get
{
;
}
//.get instance bool System.WeakReference::get_IsAlive()
}
public new virtual bool get_IsAlive()
{
//.maxstack 2
//.locals init (native int V_0,
//bool V_1)
//IL_0000: ldarg.0
//IL_0001: volatile.
//IL_0003: ldfld native int modreq(System.Runtime.CompilerServices.IsVolatile) System.WeakReference::m_handle
//IL_0008: stloc.0
//IL_0009: ldsfld native int System.IntPtr::Zero
//IL_000e: ldloc.0
//IL_000f: call bool System.IntPtr::op_Equality(native int,
//native int)
//IL_0014: brfalse.s IL_0018
//IL_0016: ldc.i4.0
//IL_0017: ret
//IL_0018: ldloc.0
//IL_0019: call object System.Runtime.InteropServices.GCHandle::InternalGet(native int)
//IL_001e: ldnull
//IL_001f: ceq
//IL_0021: ldc.i4.0
//IL_0022: ceq
//IL_0024: stloc.1
//IL_0025: ldarg.0
//IL_0026: volatile.
//IL_0028: ldfld native int modreq(System.Runtime.CompilerServices.IsVolatile) System.WeakReference::m_handle
//IL_002d: ldsfld native int System.IntPtr::Zero
//IL_0032: call bool System.IntPtr::op_Equality(native int,
//native int)
//IL_0037: brtrue.s IL_003b
//IL_0039: ldloc.1
//IL_003a: ret
//IL_003b: ldc.i4.0
//IL_003c: ret
System.IntPtr V_0;
bool V_1;
V_0=this.m_handle;
if(System.IntPtr.Zero==V_0)
{
return false;
}
else
{
V_1=(GCHandle.InternalGet(V_0)==null)==false;
//IL_0025
if (this.m_handle == System.IntPtr.Zero)
{
return false;
}
else
{
return V_1;
}
}
}
public new virtual bool TrackResurrection
{
get
{
;
}
//.get instance bool System.WeakReference::get_TrackResurrection()
}
public new virtual bool get_TrackResurrection()
{
//.maxstack 8
//IL_0000: ldarg.0
//IL_0001: ldfld bool System.WeakReference::m_IsLongReference
//IL_0006: ret
return this.m_IsLongReference;
}
public new virtual object Target
{
get
{
;
}
set
{
;
}
//.set instance void System.WeakReference::set_Target(object)
//.get instance object System.WeakReference::get_Target()
}
public new virtual object get_Target()
{
//.maxstack 2
//.locals init (native int V_0,
//object V_1)
//IL_0000: ldarg.0
//IL_0001: volatile.
//IL_0003: ldfld native int modreq(System.Runtime.CompilerServices.IsVolatile) System.WeakReference::m_handle
//IL_0008: stloc.0
//IL_0009: ldsfld native int System.IntPtr::Zero
//IL_000e: ldloc.0
//IL_000f: call bool System.IntPtr::op_Equality(native int,
//native int)
//IL_0014: brfalse.s IL_0018
//IL_0016: ldnull
//IL_0017: ret
//IL_0018: ldloc.0
//IL_0019: call object System.Runtime.InteropServices.GCHandle::InternalGet(native int)
//IL_001e: stloc.1
//IL_001f: ldarg.0
//IL_0020: volatile.
//IL_0022: ldfld native int modreq(System.Runtime.CompilerServices.IsVolatile) System.WeakReference::m_handle
//IL_0027: ldsfld native int System.IntPtr::Zero
//IL_002c: call bool System.IntPtr::op_Equality(native int,
//native int)
//IL_0031: brtrue.s IL_0035
//IL_0033: ldloc.1
//IL_0034: ret
//IL_0035: ldnull
//IL_0036: ret
System.IntPtr V_0;
object V_1;
V_0=this.m_handle;
if (System.IntPtr.Zero == V_0)
{
return null;
}
else
{
V_1=GCHandle.InternalGet(V_0);
if (this.m_handle == System.IntPtr.Zero)
{
return null;
}
else
{
return V_1;
}
}
}
public new virtual void set_Target(object @value)
{
//.maxstack 4
//.locals init (native int V_0,
//object V_1)
//IL_0000: ldarg.0
//IL_0001: volatile.
//IL_0003: ldfld native int modreq(System.Runtime.CompilerServices.IsVolatile) System.WeakReference::m_handle
//IL_0008: stloc.0
//IL_0009: ldloc.0
//IL_000a: ldsfld native int System.IntPtr::Zero
//IL_000f: call bool System.IntPtr::op_Equality(native int,
//native int)
//IL_0014: brfalse.s IL_0026
//IL_0016: ldstr "InvalidOperation_HandleIsNotInitialized"
//IL_001b: call string System.Environment::GetResourceString(string)
//IL_0020: newobj instance void System.InvalidOperationException::.ctor(string)
//IL_0025: throw
//IL_0026: ldloc.0
//IL_0027: call object System.Runtime.InteropServices.GCHandle::InternalGet(native int)
//IL_002c: stloc.1
//IL_002d: ldarg.0
//IL_002e: volatile.
//IL_0030: ldfld native int modreq(System.Runtime.CompilerServices.IsVolatile) System.WeakReference::m_handle
//IL_0035: stloc.0
//IL_0036: ldloc.0
//IL_0037: ldsfld native int System.IntPtr::Zero
//IL_003c: call bool System.IntPtr::op_Equality(native int,
//native int)
//IL_0041: brfalse.s IL_0053
//IL_0043: ldstr "InvalidOperation_HandleIsNotInitialized"
//IL_0048: call string System.Environment::GetResourceString(string)
//IL_004d: newobj instance void System.InvalidOperationException::.ctor(string)
//IL_0052: throw
//IL_0053: ldloc.0
//IL_0054: ldarg.1
//IL_0055: ldloc.1
//IL_0056: ldc.i4.0
//IL_0057: call object System.Runtime.InteropServices.GCHandle::InternalCompareExchange(native int,
//object,
//object,
//bool)
//IL_005c: pop
//IL_005d: ldarg.0
//IL_005e: call void System.GC::KeepAlive(object)
//IL_0063: ret
System.IntPtr V_0;
object V_1;
V_0 = this.m_handle;
if (V_0 == System.IntPtr.Zero)
{
throw new System.InvalidOperationException(System.Environment.GetResourceString("InvalidOperation_HandleIsNotInitialized"));
}
else
{
V_1 = GCHandle.InternalGet(V_0);
V_0 = this.m_handle;
if (V_0 == System.IntPtr.Zero)
{
throw new System.InvalidOperationException(System.Environment.GetResourceString("InvalidOperation_HandleIsNotInitialized"));
}
else
{
GCHandle.InternalCompareExchange(V_0, @value, V_1, false);
GC.KeepAlive(this);
}
}
}
protected virtual ~WeakReference()
{
//.maxstack 4
//.locals init (native int V_0)
//.try
//{
//IL_0000: ldarg.0
//IL_0001: volatile.
//IL_0003: ldfld native int modreq(System.Runtime.CompilerServices.IsVolatile) System.WeakReference::m_handle
//IL_0008: stloc.0
//IL_0009: ldloc.0
//IL_000a: ldsfld native int System.IntPtr::Zero
//IL_000f: call bool System.IntPtr::op_Inequality(native int,
//native int)
//IL_0014: brfalse.s IL_0035
//IL_0016: ldloc.0
//IL_0017: ldarg.0
//IL_0018: ldflda native int modreq(System.Runtime.CompilerServices.IsVolatile) System.WeakReference::m_handle
//IL_001d: ldsfld native int System.IntPtr::Zero
//IL_0022: ldloc.0
//IL_0023: call native int System.Threading.Interlocked::CompareExchange(native int&,
//native int,
//native int)
//IL_0028: call bool System.IntPtr::op_Equality(native int,
//native int)
//IL_002d: brfalse.s IL_0035
//IL_002f: ldloc.0
//IL_0030: call void System.Runtime.InteropServices.GCHandle::InternalFree(native int)
//IL_0035: leave.s IL_003e
//}
//finally
//{
//IL_0037: ldarg.0
//IL_0038: call instance void System.Object::Finalize()
//IL_003d: endfinally
//}
//IL_003e: ret
System.IntPtr V_0;
try
{
V_0 = this.m_handle;
if (V_0 != System.IntPtr.Zero)
{
if (V_0 == System.Threading.Interlocked.CompareExchange(ref this.m_handle, System.IntPtr.Zero, V_0))
{
GCHandle.InternalFree(V_0);
}
else
{
return;
}
}
else
{
return;
}
}
finally
{
base();
}
}
public new virtual void GetObjectData(System.Runtime.Serialization.SerializationInfo info,System.Runtime.Serialization.StreamingContext context)
{
//.maxstack 8
//IL_0000: ldarg.1
//IL_0001: brtrue.s IL_000e
//IL_0003: ldstr "info"
//IL_0008: newobj instance void System.ArgumentNullException::.ctor(string)
//IL_000d: throw
//IL_000e: ldarg.1
//IL_000f: ldstr "TrackedObject"
//IL_0014: ldarg.0
//IL_0015: callvirt instance object System.WeakReference::get_Target()
//IL_001a: ldtoken System.Object
//IL_001f: call class System.Type System.Type::GetTypeFromHandle(valuetype System.RuntimeTypeHandle)
//IL_0024: callvirt instance void System.Runtime.Serialization.SerializationInfo::AddValue(string,
//object,
//class System.Type)
//IL_0029: ldarg.1
//IL_002a: ldstr "TrackResurrection"
//IL_002f: ldarg.0
//IL_0030: ldfld bool System.WeakReference::m_IsLongReference
//IL_0035: callvirt instance void System.Runtime.Serialization.SerializationInfo::AddValue(string,
//bool)
//IL_003a: ret
if (info == null)
{
throw new System.ArgumentNullException("info");
}
else
{
info.AddValue("TrackedObject", this.Target, typeof(object));
info.AddValue("TrackResurrection",this.m_IsLongReference);
}
}
}
}
