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abi.go
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abi.go
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// Copyright 2021 Layotto Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package wasm
import (
"errors"
"mosn.io/mosn/pkg/types"
"mosn.io/mosn/pkg/wasm/abi"
v1 "mosn.io/mosn/pkg/wasm/abi/proxywasm010"
)
const AbiV2 = "proxy_abi_version_0_2_0"
// registers an abi
func init() {
abi.RegisterABI(AbiV2, abiImplFactory)
}
// initialization an abi
func abiImplFactory(instance types.WasmInstance) types.ABI {
abi := &AbiV2Impl{}
abi.SetInstance(instance)
return abi
}
// easy for extension
type AbiV2Impl struct {
v1.ABIContext
}
var (
_ types.ABIHandler = &AbiV2Impl{}
_ Exports = &AbiV2Impl{}
)
// Get abi name
func (a *AbiV2Impl) Name() string {
return AbiV2
}
// Get abi
func (a *AbiV2Impl) GetABIExports() interface{} {
return a
}
// Get id
func (a *AbiV2Impl) ProxyGetID() (string, error) {
// store the funcName and common.WasmFunction, then return the common.WasmFunction
ff, err := a.Instance.GetExportsFunc("proxy_get_id")
if err != nil {
return "", err
}
_, err = ff.Call()
if err != nil {
a.Instance.HandleError(err)
return "", err
}
a.Imports.Wait()
// generate functionId
functionId := string(a.Imports.GetFuncCallData().Bytes())
if functionId == "" {
return "", errors.New("")
}
return functionId, nil
}