internal static void RunInternal(ExecutionContext executionContext, ContextCallback callback, object state, bool preserveSyncCtx)
{
if (!executionContext.IsPreAllocatedDefault)
{
executionContext.isNewCapture = false;
}
Thread currentThread = Thread.CurrentThread;
ExecutionContextSwitcher ecsw = new ExecutionContextSwitcher();
RuntimeHelpers.PrepareConstrainedRegions();
try
{
ExecutionContext.Reader executionContextReader = currentThread.GetExecutionContextReader();
if ((executionContextReader.IsNull || executionContextReader.IsDefaultFTContext(preserveSyncCtx)) && (SecurityContext.CurrentlyInDefaultFTSecurityContext(executionContextReader) && executionContext.IsDefaultFTContext(preserveSyncCtx)) && executionContextReader.HasSameLocalValues(executionContext))
{
ExecutionContext.EstablishCopyOnWriteScope(currentThread, true, ref ecsw);
}
else
{
if (executionContext.IsPreAllocatedDefault)
{
executionContext = new ExecutionContext();
}
ecsw = ExecutionContext.SetExecutionContext(executionContext, preserveSyncCtx);
}
callback(state);
}
finally
{
ecsw.Undo();
}
}
internal void Undo()
{
if (this.thread == null)
{
return;
}
Thread thread = this.thread;
if (this.hecsw != null)
{
HostExecutionContextSwitcher.Undo(this.hecsw);
}
ExecutionContext.Reader executionContextReader = thread.GetExecutionContextReader();
ExecutionContext.Reader reader = this.outerEC;
int num = this.outerECBelongsToScope ? 1 : 0;
thread.SetExecutionContext(reader, num != 0);
if (this.scsw.currSC != null)
{
this.scsw.Undo();
}
if (this.wiIsValid)
{
SecurityContext.RestoreCurrentWI(this.outerEC, executionContextReader, this.wi, this.cachedAlwaysFlowImpersonationPolicy);
}
this.thread = (Thread)null;
ExecutionContext.OnAsyncLocalContextChanged(executionContextReader.DangerousGetRawExecutionContext(), this.outerEC.DangerousGetRawExecutionContext());
}
internal static void RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, bool preserveSyncCtx)
{
Contract.Assert(executionContext != null);
if (executionContext.IsPreAllocatedDefault)
{
Contract.Assert(executionContext.IsDefaultFTContext(preserveSyncCtx));
}
else
{
Contract.Assert(executionContext.isNewCapture);
executionContext.isNewCapture = false;
}
Thread currentThread = Thread.CurrentThread;
ExecutionContextSwitcher ecsw = default(ExecutionContextSwitcher);
RuntimeHelpers.PrepareConstrainedRegions();
try
{
ExecutionContext.Reader ec = currentThread.GetExecutionContextReader();
if ((ec.IsNull || ec.IsDefaultFTContext(preserveSyncCtx)) &&
#if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
SecurityContext.CurrentlyInDefaultFTSecurityContext(ec) &&
#endif // #if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
executionContext.IsDefaultFTContext(preserveSyncCtx))
{
// Neither context is interesting, so we don't need to set the context.
// We do need to reset any changes made by the user's callback,
// so here we establish a "copy-on-write scope". Any changes will
// result in a copy of the context being made, preserving the original
// context.
EstablishCopyOnWriteScope(currentThread, true, ref ecsw);
}
else
{
if (executionContext.IsPreAllocatedDefault)
{
executionContext = executionContext.CreateCopy();
}
ecsw = SetExecutionContext(executionContext, preserveSyncCtx);
}
//
// Call the user's callback
//
callback(state);
}
finally
{
ecsw.Undo(currentThread);
}
}
internal static ExecutionContext Capture(ref StackCrawlMark stackMark, ExecutionContext.CaptureOptions options)
{
ExecutionContext.Reader executionContextReader = Thread.CurrentThread.GetExecutionContextReader();
if (executionContextReader.IsFlowSuppressed)
{
return((ExecutionContext)null);
}
SecurityContext securityContext = SecurityContext.Capture(executionContextReader, ref stackMark);
HostExecutionContext executionContext1 = HostExecutionContextManager.CaptureHostExecutionContext();
SynchronizationContext synchronizationContext = (SynchronizationContext)null;
LogicalCallContext logicalCallContext = (LogicalCallContext)null;
if (!executionContextReader.IsNull)
{
if ((options & ExecutionContext.CaptureOptions.IgnoreSyncCtx) == ExecutionContext.CaptureOptions.None)
{
synchronizationContext = executionContextReader.SynchronizationContext == null ? (SynchronizationContext)null : executionContextReader.SynchronizationContext.CreateCopy();
}
if (executionContextReader.LogicalCallContext.HasInfo)
{
logicalCallContext = executionContextReader.LogicalCallContext.Clone();
}
}
Dictionary <IAsyncLocal, object> dictionary = (Dictionary <IAsyncLocal, object>)null;
List <IAsyncLocal> asyncLocalList = (List <IAsyncLocal>)null;
if (!executionContextReader.IsNull)
{
dictionary = executionContextReader.DangerousGetRawExecutionContext()._localValues;
asyncLocalList = executionContextReader.DangerousGetRawExecutionContext()._localChangeNotifications;
}
if ((options & ExecutionContext.CaptureOptions.OptimizeDefaultCase) != ExecutionContext.CaptureOptions.None && securityContext == null && (executionContext1 == null && synchronizationContext == null) && ((logicalCallContext == null || !logicalCallContext.HasInfo) && (dictionary == null && asyncLocalList == null)))
{
return(ExecutionContext.s_dummyDefaultEC);
}
ExecutionContext executionContext2 = new ExecutionContext();
executionContext2.SecurityContext = securityContext;
if (executionContext2.SecurityContext != null)
{
executionContext2.SecurityContext.ExecutionContext = executionContext2;
}
executionContext2._hostExecutionContext = executionContext1;
executionContext2._syncContext = synchronizationContext;
executionContext2.LogicalCallContext = logicalCallContext;
executionContext2._localValues = dictionary;
executionContext2._localChangeNotifications = asyncLocalList;
executionContext2.isNewCapture = true;
return(executionContext2);
}
internal static ExecutionContext Capture(ref StackCrawlMark stackMark, ExecutionContext.CaptureOptions options)
{
ExecutionContext.Reader executionContextReader = Thread.CurrentThread.GetExecutionContextReader();
if (executionContextReader.IsFlowSuppressed)
{
return(null);
}
SecurityContext securityContext = SecurityContext.Capture(executionContextReader, ref stackMark);
HostExecutionContext hostExecutionContext = HostExecutionContextManager.CaptureHostExecutionContext();
SynchronizationContext synchronizationContext = null;
LogicalCallContext logicalCallContext = null;
if (!executionContextReader.IsNull)
{
if ((options & ExecutionContext.CaptureOptions.IgnoreSyncCtx) == ExecutionContext.CaptureOptions.None)
{
synchronizationContext = ((executionContextReader.SynchronizationContext == null) ? null : executionContextReader.SynchronizationContext.CreateCopy());
}
if (executionContextReader.LogicalCallContext.HasInfo)
{
logicalCallContext = executionContextReader.LogicalCallContext.Clone();
}
}
IAsyncLocalValueMap asyncLocalValueMap = null;
IAsyncLocal[] array = null;
if (!executionContextReader.IsNull)
{
asyncLocalValueMap = executionContextReader.DangerousGetRawExecutionContext()._localValues;
array = executionContextReader.DangerousGetRawExecutionContext()._localChangeNotifications;
}
if ((options & ExecutionContext.CaptureOptions.OptimizeDefaultCase) != ExecutionContext.CaptureOptions.None && securityContext == null && hostExecutionContext == null && synchronizationContext == null && (logicalCallContext == null || !logicalCallContext.HasInfo) && asyncLocalValueMap == null && array == null)
{
return(ExecutionContext.s_dummyDefaultEC);
}
ExecutionContext executionContext = new ExecutionContext();
executionContext.SecurityContext = securityContext;
if (executionContext.SecurityContext != null)
{
executionContext.SecurityContext.ExecutionContext = executionContext;
}
executionContext._hostExecutionContext = hostExecutionContext;
executionContext._syncContext = synchronizationContext;
executionContext.LogicalCallContext = logicalCallContext;
executionContext._localValues = asyncLocalValueMap;
executionContext._localChangeNotifications = array;
executionContext.isNewCapture = true;
return(executionContext);
}
internal static ExecutionContextSwitcher SetExecutionContext(ExecutionContext executionContext, bool preserveSyncCtx)
{
StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller;
ExecutionContextSwitcher executionContextSwitcher = new ExecutionContextSwitcher();
Thread currentThread = Thread.CurrentThread;
ExecutionContext.Reader executionContextReader = currentThread.GetExecutionContextReader();
executionContextSwitcher.thread = currentThread;
executionContextSwitcher.outerEC = executionContextReader;
executionContextSwitcher.outerECBelongsToScope = currentThread.ExecutionContextBelongsToCurrentScope;
if (preserveSyncCtx)
{
executionContext.SynchronizationContext = executionContextReader.SynchronizationContext;
}
executionContext.SynchronizationContextNoFlow = executionContextReader.SynchronizationContextNoFlow;
currentThread.SetExecutionContext(executionContext, true);
RuntimeHelpers.PrepareConstrainedRegions();
try
{
ExecutionContext.OnAsyncLocalContextChanged(executionContextReader.DangerousGetRawExecutionContext(), executionContext);
SecurityContext securityContext1 = executionContext.SecurityContext;
if (securityContext1 != null)
{
SecurityContext.Reader securityContext2 = executionContextReader.SecurityContext;
executionContextSwitcher.scsw = SecurityContext.SetSecurityContext(securityContext1, securityContext2, false, ref stackMark);
}
else if (!SecurityContext.CurrentlyInDefaultFTSecurityContext(executionContextSwitcher.outerEC))
{
SecurityContext.Reader securityContext2 = executionContextReader.SecurityContext;
executionContextSwitcher.scsw = SecurityContext.SetSecurityContext(SecurityContext.FullTrustSecurityContext, securityContext2, false, ref stackMark);
}
HostExecutionContext executionContext1 = executionContext.HostExecutionContext;
if (executionContext1 != null)
{
executionContextSwitcher.hecsw = HostExecutionContextManager.SetHostExecutionContextInternal(executionContext1);
}
}
catch
{
executionContextSwitcher.UndoNoThrow();
throw;
}
return(executionContextSwitcher);
}
[System.Security.SecurityCritical] // auto-generated
static internal ExecutionContext Capture(ref StackCrawlMark stackMark, CaptureOptions options)
{
ExecutionContext.Reader ecCurrent = Thread.CurrentThread.GetExecutionContextReader();
// check to see if Flow is suppressed
if (ecCurrent.IsFlowSuppressed)
{
return(null);
}
//
// Attempt to capture context. There may be nothing to capture...
//
#if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
// capture the security context
SecurityContext secCtxNew = SecurityContext.Capture(ecCurrent, ref stackMark);
#endif // #if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
#if FEATURE_CAS_POLICY
// capture the host execution context
HostExecutionContext hostCtxNew = HostExecutionContextManager.CaptureHostExecutionContext();
#endif // FEATURE_CAS_POLICY
#if FEATURE_SYNCHRONIZATIONCONTEXT
SynchronizationContext syncCtxNew = null;
#endif
LogicalCallContext logCtxNew = null;
if (!ecCurrent.IsNull)
{
#if FEATURE_SYNCHRONIZATIONCONTEXT
// capture the [....] context
if (0 == (options & CaptureOptions.IgnoreSyncCtx))
{
syncCtxNew = (ecCurrent.SynchronizationContext == null) ? null : ecCurrent.SynchronizationContext.CreateCopy();
}
#endif // #if FEATURE_SYNCHRONIZATIONCONTEXT
// copy over the Logical Call Context
if (ecCurrent.LogicalCallContext.HasInfo)
{
logCtxNew = ecCurrent.LogicalCallContext.Clone();
}
}
//
// If we didn't get anything but defaults, and we're allowed to return the
// dummy default EC, don't bother allocating a new context.
//
if (0 != (options & CaptureOptions.OptimizeDefaultCase) &&
#if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
secCtxNew == null &&
#endif
#if FEATURE_CAS_POLICY
hostCtxNew == null &&
#endif // FEATURE_CAS_POLICY
#if FEATURE_SYNCHRONIZATIONCONTEXT
syncCtxNew == null &&
#endif // #if FEATURE_SYNCHRONIZATIONCONTEXT
(logCtxNew == null || !logCtxNew.HasInfo))
{
return(s_dummyDefaultEC);
}
//
// Allocate the new context, and fill it in.
//
ExecutionContext ecNew = new ExecutionContext();
#if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
ecNew.SecurityContext = secCtxNew;
if (ecNew.SecurityContext != null)
{
ecNew.SecurityContext.ExecutionContext = ecNew;
}
#endif
#if FEATURE_CAS_POLICY
ecNew._hostExecutionContext = hostCtxNew;
#endif // FEATURE_CAS_POLICY
#if FEATURE_SYNCHRONIZATIONCONTEXT
ecNew._syncContext = syncCtxNew;
#endif // #if FEATURE_SYNCHRONIZATIONCONTEXT
ecNew.LogicalCallContext = logCtxNew;
ecNew.isNewCapture = true;
return(ecNew);
}
internal void Undo(Thread currentThread)
{
//
// Don't use an uninitialized switcher, or one that's already been used.
//
if (thread == null)
{
return; // Don't do anything
}
Contract.Assert(currentThread == this.thread);
//
// Restore the HostExecutionContext before restoring the ExecutionContext.
//
#if FEATURE_CAS_POLICY
if (hecsw != null)
{
HostExecutionContextSwitcher.Undo(hecsw);
}
#endif // FEATURE_CAS_POLICY
//
// restore the saved Execution Context. Note that this will also restore the
// SynchronizationContext, Logical/IllogicalCallContext, etc.
//
#if !FEATURE_PAL && FEATURE_IMPERSONATION
ExecutionContext.Reader innerEC = currentThread.GetExecutionContextReader();
#endif
currentThread.SetExecutionContext(outerEC, outerECBelongsToScope);
#if DEBUG
try
{
currentThread.ForbidExecutionContextMutation = true;
#endif
//
// Tell the SecurityContext to do the side-effects of restoration.
//
#if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
if (scsw.currSC != null)
{
// Any critical failure inside scsw will cause FailFast
scsw.Undo();
}
#endif // #if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
#if !FEATURE_PAL && FEATURE_IMPERSONATION
if (wiIsValid)
{
SecurityContext.RestoreCurrentWI(outerEC, innerEC, wi, cachedAlwaysFlowImpersonationPolicy);
}
#endif
thread = null; // this will prevent the switcher object being used again
#if DEBUG
}
finally
{
currentThread.ForbidExecutionContextMutation = false;
}
#endif
}
[HandleProcessCorruptedStateExceptions] //
#endif // FEATURE_CORRUPTING_EXCEPTIONS
internal static ExecutionContextSwitcher SetExecutionContext(ExecutionContext executionContext, bool preserveSyncCtx)
{
#if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller;
#endif // #if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
Contract.Assert(executionContext != null);
Contract.Assert(executionContext != s_dummyDefaultEC);
// Set up the switcher object to return;
ExecutionContextSwitcher ecsw = new ExecutionContextSwitcher();
Thread currentThread = Thread.CurrentThread;
ExecutionContext.Reader outerEC = currentThread.GetExecutionContextReader();
ecsw.thread = currentThread;
ecsw.outerEC = outerEC;
ecsw.outerECBelongsToScope = currentThread.ExecutionContextBelongsToCurrentScope;
if (preserveSyncCtx)
{
executionContext.SynchronizationContext = outerEC.SynchronizationContext;
}
executionContext.SynchronizationContextNoFlow = outerEC.SynchronizationContextNoFlow;
currentThread.SetExecutionContext(executionContext, belongsToCurrentScope: true);
RuntimeHelpers.PrepareConstrainedRegions();
try
{
#if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
//set the security context
SecurityContext sc = executionContext.SecurityContext;
if (sc != null)
{
// non-null SC: needs to be set
SecurityContext.Reader prevSeC = outerEC.SecurityContext;
ecsw.scsw = SecurityContext.SetSecurityContext(sc, prevSeC, false, ref stackMark);
}
else if (!SecurityContext.CurrentlyInDefaultFTSecurityContext(ecsw.outerEC))
{
// null incoming SC, but we're currently not in FT: use static FTSC to set
SecurityContext.Reader prevSeC = outerEC.SecurityContext;
ecsw.scsw = SecurityContext.SetSecurityContext(SecurityContext.FullTrustSecurityContext, prevSeC, false, ref stackMark);
}
#endif // #if FEATURE_IMPERSONATION || FEATURE_COMPRESSEDSTACK
#if FEATURE_CAS_POLICY
// set the Host Context
HostExecutionContext hostContext = executionContext.HostExecutionContext;
if (hostContext != null)
{
ecsw.hecsw = HostExecutionContextManager.SetHostExecutionContextInternal(hostContext);
}
#endif // FEATURE_CAS_POLICY
}
catch
{
ecsw.UndoNoThrow();
throw;
}
return(ecsw);
}
//public Thread Thread { get { return m_ec._thread; } }
public bool IsSame(ExecutionContext.Reader other)
{
return(m_ec == other.m_ec);
}
