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@_exported import WasmTypes
/// Error type for canonical ABI operations.
public struct CanonicalABIError: Error, CustomStringConvertible {
public let description: String
@_documentation(visibility: internal)
public init(description: String) {
self.description = description
}
}
/// Call context for `(canon lift)` or `(canon lower)` operations.
/// This type corresponds to `CallContext` in the Canonical ABI spec.
///
/// > Note:
/// <https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md#runtime-state>
public struct CanonicalCallContext {
/// The options used for lifting or lowering operations.
public let options: CanonicalOptions
/// The module instance that defines the lift/lower operation.
public let instance: Instance
/// A reference to the guest memory.
public var guestMemory: Memory {
options.memory
}
public init(options: CanonicalOptions, instance: Instance) {
self.options = options
self.instance = instance
}
/// Call `cabi_realloc` export with the given arguments.
public func realloc(
old: UInt32,
oldSize: UInt32,
oldAlign: UInt32,
newSize: UInt32
) throws -> UnsafeGuestRawPointer {
guard let realloc = options.realloc else {
throw CanonicalABIError(description: "Missing required \"cabi_realloc\" export")
}
let results = try realloc(
[.i32(old), .i32(oldSize), .i32(oldAlign), .i32(newSize)]
)
guard results.count == 1 else {
throw CanonicalABIError(description: "\"cabi_realloc\" export should return a single value")
}
guard case let .i32(new) = results[0] else {
throw CanonicalABIError(description: "\"cabi_realloc\" export should return an i32 value")
}
return UnsafeGuestRawPointer(memorySpace: guestMemory, offset: new)
}
}
extension CanonicalCallContext {
@available(*, deprecated, renamed: "instance")
public var moduleInstance: Instance {
return instance
}
@available(*, deprecated, renamed: "init(options:instance:)")
public init(options: CanonicalOptions, moduleInstance: Instance, runtime: Runtime) {
self.init(options: options, instance: moduleInstance)
}
}
@available(*, deprecated, renamed: "Memory", message: "WasmKitGuestMemory has been removed; use Memory instead")
public typealias WasmKitGuestMemory = Memory
extension Memory {
/// Creates a new memory instance from the given store and address
@available(*, unavailable, message: "WasmKitGuestMemory has been removed; use Memory instead")
public init(store: Store, memory: Memory) {
fatalError()
}
}
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