Hywan released this on Jul 16, 2019 · 250 commits to master since this release

Features

• #55 Add the Memory.Grow method (@Hywan)

• #42 Improve error messages when instantiating (@Hywan)

• #38 Support import descriptors (@Hywan)

  var module, _ = wasm.Compile(bytes)
  
  assert.Equal(…, "log_message", module.Imports[0].Name)
  assert.Equal(…, "env", module.Imports[0].Namespace)

• #37 Support export descriptors (@Hywan)

  var module, _ = wasm.Compile(bytes)
  
  assert.Equal(…, "sum", module.Exports[7].Name)

• #34 Support module serialization and deserialization (@Hywan)

  // Compiles the bytes into a WebAssembly module.
  module1, _ := wasm.Compile(GetBytes())
  defer module1.Close()
  
  // Serializes the module into a sequence of bytes.
  serialization, _ := module1.Serialize()
  
  // Do something with `serialization`.
  // Then later…
  
  // Deserializes the module.
  module2, _ := wasm.DeserializeModule(serialization)
  defer module2.Close()
  // And enjoy!
  
  // Instantiates the WebAssembly module.
  instance, _ := module2.Instantiate()
  defer instance.Close()
  
  // Gets an exported function.
  sum, functionExists := instance.Exports["sum"]
  
  fmt.Println(functionExists)
  
  // Calls the `sum` exported function with Go values.
  result, _ := sum(1, 2)
  
  fmt.Println(result)
  
  // Output:
  // true
  // 3

• #33 Add Compile, Module.Instantiate* and Module.Close (@Hywan)

• #30 Support instance context data (@Hywan)

  //export logMessageWithContextData
  func logMessageWithContextData(context unsafe.Pointer, pointer int32, length int32) {
          var instanceContext = wasm.IntoInstanceContext(context)
          var memory = instanceContext.Memory().Data()
          var logMessage = (*logMessageContext)(instanceContext.Data())
  
          logMessage.message = string(memory[pointer : pointer+length])
  }
  
  type logMessageContext struct {
          message string
  }
  
  func testImportInstanceContextData(t *testing.T) {
          imports, err := wasm.NewImports().Append("log_message", logMessageWithContextData, C.logMessageWithContextData)
          assert.NoError(t, err)
  
          instance, err := wasm.NewInstanceWithImports(getImportedFunctionBytes("log.wasm"), imports)
          assert.NoError(t, err)
  
          defer instance.Close()
  
          contextData := logMessageContext{message: "first"}
          instance.SetContextData(unsafe.Pointer(&contextData))
  
          doSomething := instance.Exports["do_something"]
  
          result, err := doSomething()
  
          assert.NoError(t, err)
          assert.Equal(t, wasm.TypeVoid, result.GetType())
          assert.Equal(t, "hello", contextData.message)
  }

• #29 Add Imports.Namespace to set the current import namespace (@Hywan)

  // By default, the namespace is `"env"`. Change it to `"ns"`.
  wasm.NewImports().Namespace("ns").Append("f", f, C.f)

• #26 Support instance context API (@Hywan)

Bug/security fixes

• #56 Update Wasmer to 0.5.5 (@Hywan)

Documentation/Test

• #51 Test that all Wasm types can be used in imported functions (@Hywan)
• #36 Improve the Benchmarks Section (@Hywan)
• #32 Move examples in the root directory for godoc.org (@Hywan)
• #31 Fix example namespaces for godoc.org (@Hywan)
• #30 Increase the cgocheck level (@Hywan)

Chore

• #54 Reorganize bridge.go (@Hywan)
• #15 Build and test on macOS (@Hywan)