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Implement WASI C API.

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This commit implements an initial WASI C API that can be used to instantiate
and configure a WASI instance from C.

This also implements a `WasiBuilder` for the C# API enabling .NET hosts to bind
to Wasmtime's WASI implementation.
This commit is contained in:
Peter Huene
2020-02-07 11:24:26 -08:00
parent f8abe1169c
commit ae0b4090ce
28 changed files with 1303 additions and 268 deletions
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22
crates/misc/dotnet/src/Bindings/GlobalBinding.cs
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@@ -8,7 +8,7 @@ namespace Wasmtime.Bindings
/// <summary>
/// Represents a host global binding.
/// </summary>
public class GlobalBinding : Binding
internal class GlobalBinding : Binding
{
/// <summary>
/// Constructs a new global binding.
@@ -43,12 +43,12 @@ namespace Wasmtime.Bindings
/// </summary>
public FieldInfo Field { get; private set; }
internal override SafeHandle Bind(Store store, IHost host)
public override SafeHandle Bind(Store store, IHost host)
{
unsafe
{
dynamic global = Field.GetValue(host);
if (global.Handle != null)
if (!(global.Handle is null))
{
throw new InvalidOperationException("Cannot bind more than once.");
}
@@ -74,17 +74,17 @@ namespace Wasmtime.Bindings
{
if (Field.IsStatic)
{
ThrowBindingException(Import, Field, "field cannot be static");
throw CreateBindingException(Import, Field, "field cannot be static");
}
if (!Field.IsInitOnly)
{
ThrowBindingException(Import, Field, "field must be readonly");
throw CreateBindingException(Import, Field, "field must be readonly");
}
if (!Field.FieldType.IsGenericType)
{
ThrowBindingException(Import, Field, "field is expected to be of type 'Global<T>'");
throw CreateBindingException(Import, Field, "field is expected to be of type 'Global<T>'");
}
var definition = Field.FieldType.GetGenericTypeDefinition();
@@ -92,19 +92,19 @@ namespace Wasmtime.Bindings
{
if (Import.IsMutable)
{
ThrowBindingException(Import, Field, "the import is mutable (use the 'MutableGlobal' type)");
throw CreateBindingException(Import, Field, "the import is mutable (use the 'MutableGlobal' type)");
}
}
else if (definition == typeof(MutableGlobal<>))
{
if (!Import.IsMutable)
{
ThrowBindingException(Import, Field, "the import is constant (use the 'Global' type)");
throw CreateBindingException(Import, Field, "the import is constant (use the 'Global' type)");
}
}
else
{
ThrowBindingException(Import, Field, "field is expected to be of type 'Global<T>' or 'MutableGlobal<T>'");
throw CreateBindingException(Import, Field, "field is expected to be of type 'Global<T>' or 'MutableGlobal<T>'");
}
var arg = Field.FieldType.GetGenericArguments()[0];
@@ -113,12 +113,12 @@ namespace Wasmtime.Bindings
{
if (!Interop.IsMatchingKind(kind, Import.Kind))
{
ThrowBindingException(Import, Field, $"global type argument is expected to be of type '{Interop.ToString(Import.Kind)}'");
throw CreateBindingException(Import, Field, $"global type argument is expected to be of type '{Interop.ToString(Import.Kind)}'");
}
}
else
{
ThrowBindingException(Import, Field, $"'{arg}' is not a valid global type");
throw CreateBindingException(Import, Field, $"'{arg}' is not a valid global type");
}
}
}