private async Task UpdateReferenceAsync(
Project project, Compilation compilation, PortableExecutableReference reference, CancellationToken cancellationToken)
{
var key = GetReferenceKey(reference);
if (key == null)
{
return;
}
DateTime lastWriteTime;
if (!TryGetLastWriteTime(key, out lastWriteTime))
{
// Couldn't get the write time. Just ignore this reference.
return;
}
MetadataInfo metadataInfo;
if (!_metadataPathToInfo.TryGetValue(key, out metadataInfo) || metadataInfo.TimeStamp == lastWriteTime)
{
var assembly = compilation.GetAssemblyOrModuleSymbol(reference) as IAssemblySymbol;
var info = assembly == null
? null
: await SymbolTreeInfo.TryGetInfoForMetadataAssemblyAsync(project.Solution, assembly, reference, loadOnly : false, cancellationToken : cancellationToken).ConfigureAwait(false);
metadataInfo = new MetadataInfo(lastWriteTime, info, metadataInfo.ReferencingProjects ?? new HashSet <ProjectId>());
_metadataPathToInfo.AddOrUpdate(key, metadataInfo, (_1, _2) => metadataInfo);
}
// Keep track that this dll is referenced by this project.
metadataInfo.ReferencingProjects.Add(project.Id);
}
public async Task <SymbolTreeInfo> TryGetSymbolTreeInfoAsync(
Solution solution,
IAssemblySymbol assembly,
PortableExecutableReference reference,
CancellationToken cancellationToken)
{
var key = GetReferenceKey(reference);
if (key != null)
{
MetadataInfo metadataInfo;
if (_metadataPathToInfo.TryGetValue(key, out metadataInfo))
{
DateTime writeTime;
if (TryGetLastWriteTime(key, out writeTime) && writeTime == metadataInfo.TimeStamp)
{
return(metadataInfo.SymbolTreeInfo);
}
}
}
// If we didn't have it in our cache, see if we can load it from disk.
// Note: pass 'loadOnly' so we only attempt to load from disk, not to actually
// try to create the metadata.
var info = await SymbolTreeInfo.TryGetInfoForMetadataAssemblyAsync(
solution, assembly, reference, loadOnly : true, cancellationToken : cancellationToken).ConfigureAwait(false);
return(info);
}