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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 capture
import (
"context"
"github.com/google/gapid/core/context/keys"
"github.com/google/gapid/gapis/service/path"
)
type contextKeyTy string
const contextKey = contextKeyTy("captureID")
// Put attaches a capture path to a Context.
func Put(ctx context.Context, c *path.Capture) context.Context {
return keys.WithValue(ctx, contextKey, c)
}
// Get retrieves the capture path from a context previously annotated by Put.
func Get(ctx context.Context) *path.Capture {
val := ctx.Value(contextKey)
if val == nil {
panic(contextKey + " not present")
}
return val.(*path.Capture)
}
// Resolve resolves the capture from a context previously annotated by Put.
func Resolve(ctx context.Context) (Capture, error) {
return ResolveFromPath(ctx, Get(ctx))
}
// ResolveGraphics resolves the capture from a context previously annotated by Put,
// and ensures that it is a graphics capture.
func ResolveGraphics(ctx context.Context) (*GraphicsCapture, error) {
return ResolveGraphicsFromPath(ctx, Get(ctx))
}
// ResolvePerfetto resolves the capture from a context previously annotated by Put,
// and ensures that it is a perfetto capture.
func ResolvePerfetto(ctx context.Context) (*PerfettoCapture, error) {
return ResolvePerfettoFromPath(ctx, Get(ctx))
}