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context.go
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context.go
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// Copyright (C) 2017 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 replay
import (
"context"
"github.com/google/gapid/core/context/keys"
"github.com/google/gapid/gapis/service/path"
)
type contextMgrKeyTy string
const contextMgrKey = contextMgrKeyTy("replayMgrID")
// PutManager attaches a manager to a Context.
func PutManager(ctx context.Context, m Manager) context.Context {
return keys.WithValue(ctx, contextMgrKey, m)
}
// GetManager retrieves the manager from a context previously annotated by
// PutManager.
func GetManager(ctx context.Context) Manager {
val := ctx.Value(contextMgrKey)
if val == nil {
panic(string(contextMgrKey + " not present"))
}
return val.(Manager)
}
type contextDeviceKeyTy string
const contextDeviceKey = contextDeviceKeyTy("replayDeviceID")
// PutDevice attaches a target replay device to a Context.
func PutDevice(ctx context.Context, m *path.Device) context.Context {
return keys.WithValue(ctx, contextDeviceKey, m)
}
// GetDevice retrieves the target replay device from a context previously
// annotated by PutDevice.
func GetDevice(ctx context.Context) *path.Device {
val := ctx.Value(contextDeviceKey)
if val == nil {
return nil
}
return val.(*path.Device)
}