//
// Return a generic type instantiation using the runtime type system. If the underlying runtime type system does not support
// this operation, return false.
//
internal bool TryLookupConstructedGenericTypeForComponents(GenericTypeLookupData lookupData, out RuntimeTypeHandle runtimeTypeHandle)
{
if (!TryGetStaticGenericTypeForComponents(lookupData, out runtimeTypeHandle))
{
if (!TryGetDynamicGenericTypeForComponents(lookupData, out runtimeTypeHandle))
{
return(false);
}
}
return(true);
}
internal unsafe bool TryGetStaticGenericTypeForComponents(GenericTypeLookupData lookupData, out RuntimeTypeHandle runtimeTypeHandle)
{
// Search the hashtable for a generic instantiation match
// TODO multi-file: consider whether we can limit the search somehow,
// i.e. not look at all the modules
runtimeTypeHandle = default(RuntimeTypeHandle);
int loadedModuleCount = RuntimeAugments.GetLoadedModules(null);
var moduleHandles = new System.IntPtr[loadedModuleCount];
RuntimeAugments.GetLoadedModules(moduleHandles);
NativeHashtable genericsHashtable;
ExternalReferencesTable externalReferencesLookup;
foreach (IntPtr moduleHandle in moduleHandles)
{
if (!GetHashtableFromBlob(moduleHandle, ReflectionMapBlob.GenericsHashtable, out genericsHashtable, out externalReferencesLookup))
{
continue;
}
int lookupHashcode = lookupData.LookupHashCode();
var enumerator = genericsHashtable.Lookup(lookupHashcode);
NativeParser entryParser;
while (!(entryParser = enumerator.GetNext()).IsNull)
{
RuntimeTypeHandle tentativeType = externalReferencesLookup.GetRuntimeTypeHandleFromIndex(entryParser.GetUnsigned());
if (!lookupData.MatchParsedEntry(tentativeType))
{
continue;
}
runtimeTypeHandle = tentativeType;
Debug.Assert(RuntimeAugments.IsGenericType(runtimeTypeHandle));
return(true);
}
}
return(false);
}
private unsafe bool TryGetDynamicGenericTypeForComponents(GenericTypeLookupData lookupData, out RuntimeTypeHandle runtimeTypeHandle)
{
runtimeTypeHandle = default(RuntimeTypeHandle);
using (LockHolder.Hold(_dynamicGenericsLock))
{
GenericTypeEntry entry;
if (!_dynamicGenericTypes.TryGetValue(lookupData, out entry))
{
return(false);
}
if (!entry._isRegisteredSuccessfully)
{
return(false);
}
runtimeTypeHandle = entry._instantiatedTypeHandle;
return(true);
}
}
