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config.go
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config.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 cluster_specifier
/*
// ref https://github.com/golang/go/issues/25832
#cgo linux LDFLAGS: -Wl,-unresolved-symbols=ignore-all
#cgo darwin LDFLAGS: -Wl,-undefined,dynamic_lookup
#include <stdlib.h>
#include <string.h>
#include "api.h"
*/
import "C"
import (
"sync"
"sync/atomic"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
"github.com/envoyproxy/envoy/contrib/golang/common/go/utils"
)
const errCodeInvalidConfig = 0
var (
pluginNumGenerator uint64
pluginCache = sync.Map{}
)
//export envoyGoClusterSpecifierNewPlugin
func envoyGoClusterSpecifierNewPlugin(configPtr uint64, configLen uint64) uint64 {
if clusterSpecifierConfigFactory == nil {
panic("no cluster specifier config factory registered")
}
buf := utils.BytesToSlice(configPtr, configLen)
var any anypb.Any
if err := proto.Unmarshal(buf, &any); err != nil {
return errCodeInvalidConfig
}
plugin := clusterSpecifierConfigFactory(&any)
pluginNum := atomic.AddUint64(&pluginNumGenerator, 1)
pluginCache.Store(pluginNum, plugin)
return pluginNum
}
//export envoyGoClusterSpecifierDestroyPlugin
func envoyGoClusterSpecifierDestroyPlugin(id uint64) {
pluginCache.Delete(id)
}