internal static string MakeDynamicCallSiteDelegateName(RefKindVector byRefs, bool returnsVoid, int generation)
{
var pooledBuilder = PooledStringBuilder.GetInstance();
var builder = pooledBuilder.Builder;
builder.Append(returnsVoid ? "<>A" : "<>F");
if (!byRefs.IsNull)
{
builder.Append("{");
int i = 0;
foreach (int byRefIndex in byRefs.Words())
{
if (i > 0)
{
builder.Append(",");
}
builder.AppendFormat("{0:x8}", byRefIndex);
i++;
}
builder.Append("}");
Debug.Assert(i > 0);
}
AppendOptionalGeneration(builder, generation);
return(pooledBuilder.ToStringAndFree());
}
/// <summary>
/// Parses the name of a synthesized delegate out into the things it represents.
/// </summary>
/// <remarks>
/// Logic here should match <see cref="MakeSynthesizedDelegateName" />.
/// </remarks>
internal static bool TryParseSynthesizedDelegateName(string name, out RefKindVector byRefs, out bool returnsVoid, out int generation, out int parameterCount)
{
byRefs = default;
parameterCount = 0;
generation = 0;
name = MetadataHelpers.InferTypeArityAndUnmangleMetadataName(name, out var arity);
returnsVoid = name.StartsWith(ActionDelegateNamePrefix);
if (!returnsVoid && !name.StartsWith(FuncDelegateNamePrefix))
{
return(false);
}
parameterCount = arity - (returnsVoid ? 0 : 1);
// If there are no ref kinds encoded
// (and therefore no braces), use the end of the prefix instead.
var nameEndIndex = name.LastIndexOf('}');
if (nameEndIndex < 0)
{
nameEndIndex = DelegateNamePrefixLength - 1;
}
else
{
// There should be a character after the prefix, and it should be an open brace
if (name.Length <= DelegateNamePrefixLength || name[DelegateNamePrefixLength] != '{')
{
return(false);
}
// If there are braces, then the ref kind string is encoded between them
var refKindString = name[DelegateNamePrefixLengthWithOpenBrace..nameEndIndex];
internal SynthesizedDelegateSymbol SynthesizeDelegate(int parameterCount, RefKindVector refKinds, bool returnsVoid, int generation)
{
// parameterCount doesn't include return type
Debug.Assert(refKinds.IsNull || parameterCount == refKinds.Capacity - (returnsVoid ? 0 : 1));
var key = new SynthesizedDelegateKey(parameterCount, refKinds, returnsVoid, generation);
SynthesizedDelegateValue result;
if (this.SynthesizedDelegates.TryGetValue(key, out result))
{
return(result.Delegate);
}
// NOTE: the newly created template may be thrown away if another thread wins
var synthesizedDelegate = new SynthesizedDelegateSymbol(
this.Compilation.Assembly.GlobalNamespace,
key.MakeTypeName(),
this.System_Object,
Compilation.GetSpecialType(SpecialType.System_IntPtr),
returnsVoid ? Compilation.GetSpecialType(SpecialType.System_Void) : null,
parameterCount,
refKinds);
return(this.SynthesizedDelegates.GetOrAdd(key, new SynthesizedDelegateValue(this, synthesizedDelegate)).Delegate);
}
public SynthesizedDelegateKey(int parameterCount, RefKindVector byRefs, bool returnsVoid, int generation)
{
_parameterCount = (ushort)parameterCount;
_returnsVoid = returnsVoid;
_generation = generation;
_byRefs = byRefs;
}
private SynthesizedDelegateValue CreatePlaceholderSynthesizedDelegateValue(string name, RefKindVector refKinds, bool returnsVoid, int parameterCount)
{
var symbol = new SynthesizedDelegateSymbol(
this.Compilation.Assembly.GlobalNamespace,
MetadataHelpers.InferTypeArityAndUnmangleMetadataName(name, out _),
this.System_Object,
Compilation.GetSpecialType(SpecialType.System_IntPtr),
returnsVoid ? Compilation.GetSpecialType(SpecialType.System_Void) : null,
parameterCount,
refKinds);
return(new SynthesizedDelegateValue(this, symbol));
}