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);
}
[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);
}
