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memory.go
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memory.go
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// Copyright (C) 2018 Google Inc.
//
// 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 status
import (
"context"
"runtime"
"sync"
)
var (
memorySnapshot runtime.MemStats
memoryMutex sync.RWMutex
)
// MemorySnapshot returns the memory statistics sampled from the last call to
// SnapshotMemory().
func MemorySnapshot() runtime.MemStats {
memoryMutex.RLock()
defer memoryMutex.RUnlock()
return memorySnapshot
}
// SnapshotMemory takes a snapshot of the current process's memory.
func SnapshotMemory(ctx context.Context) {
var snapshot runtime.MemStats
runtime.ReadMemStats(&snapshot)
memoryMutex.Lock()
memorySnapshot = snapshot
memoryMutex.Unlock()
onMemorySnapshot(ctx, snapshot)
}