mirror of
https://github.com/go-gitea/gitea
synced 2024-09-18 17:56:03 +00:00
ee97e6a66a
* change to new code location * vendor * tagged version v0.2.0 * gitea-vet v0.2.1 Co-authored-by: techknowlogick <techknowlogick@gitea.io>
71 lines
2.2 KiB
Go
Vendored
71 lines
2.2 KiB
Go
Vendored
// Copyright 2019 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package core
|
|
|
|
import (
|
|
"context"
|
|
"sync/atomic"
|
|
"time"
|
|
"unsafe"
|
|
|
|
"golang.org/x/tools/internal/event/label"
|
|
)
|
|
|
|
// Exporter is a function that handles events.
|
|
// It may return a modified context and event.
|
|
type Exporter func(context.Context, Event, label.Map) context.Context
|
|
|
|
var (
|
|
exporter unsafe.Pointer
|
|
)
|
|
|
|
// SetExporter sets the global exporter function that handles all events.
|
|
// The exporter is called synchronously from the event call site, so it should
|
|
// return quickly so as not to hold up user code.
|
|
func SetExporter(e Exporter) {
|
|
p := unsafe.Pointer(&e)
|
|
if e == nil {
|
|
// &e is always valid, and so p is always valid, but for the early abort
|
|
// of ProcessEvent to be efficient it needs to make the nil check on the
|
|
// pointer without having to dereference it, so we make the nil function
|
|
// also a nil pointer
|
|
p = nil
|
|
}
|
|
atomic.StorePointer(&exporter, p)
|
|
}
|
|
|
|
// deliver is called to deliver an event to the supplied exporter.
|
|
// it will fill in the time.
|
|
func deliver(ctx context.Context, exporter Exporter, ev Event) context.Context {
|
|
// add the current time to the event
|
|
ev.at = time.Now()
|
|
// hand the event off to the current exporter
|
|
return exporter(ctx, ev, ev)
|
|
}
|
|
|
|
// Export is called to deliver an event to the global exporter if set.
|
|
func Export(ctx context.Context, ev Event) context.Context {
|
|
// get the global exporter and abort early if there is not one
|
|
exporterPtr := (*Exporter)(atomic.LoadPointer(&exporter))
|
|
if exporterPtr == nil {
|
|
return ctx
|
|
}
|
|
return deliver(ctx, *exporterPtr, ev)
|
|
}
|
|
|
|
// ExportPair is called to deliver a start event to the supplied exporter.
|
|
// It also returns a function that will deliver the end event to the same
|
|
// exporter.
|
|
// It will fill in the time.
|
|
func ExportPair(ctx context.Context, begin, end Event) (context.Context, func()) {
|
|
// get the global exporter and abort early if there is not one
|
|
exporterPtr := (*Exporter)(atomic.LoadPointer(&exporter))
|
|
if exporterPtr == nil {
|
|
return ctx, func() {}
|
|
}
|
|
ctx = deliver(ctx, *exporterPtr, begin)
|
|
return ctx, func() { deliver(ctx, *exporterPtr, end) }
|
|
}
|