VOL-4925 - Build and release components.
VERSION
-------
o Bump version file for release.
Misc/
-----
o Update copyright notice to force a release build.
Change-Id: I49f5c11b24f5b0e7fd9ab1eee1a98fef271a2a52
diff --git a/vendor/go.opentelemetry.io/otel/api/global/internal/state.go b/vendor/go.opentelemetry.io/otel/api/global/internal/state.go
new file mode 100644
index 0000000..ecdfd75
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/api/global/internal/state.go
@@ -0,0 +1,134 @@
+// Copyright The OpenTelemetry Authors
+//
+// 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 internal
+
+import (
+ "sync"
+ "sync/atomic"
+
+ "go.opentelemetry.io/otel"
+ "go.opentelemetry.io/otel/api/metric"
+ "go.opentelemetry.io/otel/api/trace"
+)
+
+type (
+ tracerProviderHolder struct {
+ tp trace.TracerProvider
+ }
+
+ meterProviderHolder struct {
+ mp metric.MeterProvider
+ }
+
+ propagatorsHolder struct {
+ tm otel.TextMapPropagator
+ }
+)
+
+var (
+ globalTracer = defaultTracerValue()
+ globalMeter = defaultMeterValue()
+ globalPropagators = defaultPropagatorsValue()
+
+ delegateMeterOnce sync.Once
+ delegateTraceOnce sync.Once
+)
+
+// TracerProvider is the internal implementation for global.TracerProvider.
+func TracerProvider() trace.TracerProvider {
+ return globalTracer.Load().(tracerProviderHolder).tp
+}
+
+// SetTracerProvider is the internal implementation for global.SetTracerProvider.
+func SetTracerProvider(tp trace.TracerProvider) {
+ delegateTraceOnce.Do(func() {
+ current := TracerProvider()
+ if current == tp {
+ // Setting the provider to the prior default is nonsense, panic.
+ // Panic is acceptable because we are likely still early in the
+ // process lifetime.
+ panic("invalid TracerProvider, the global instance cannot be reinstalled")
+ } else if def, ok := current.(*tracerProvider); ok {
+ def.setDelegate(tp)
+ }
+
+ })
+ globalTracer.Store(tracerProviderHolder{tp: tp})
+}
+
+// MeterProvider is the internal implementation for global.MeterProvider.
+func MeterProvider() metric.MeterProvider {
+ return globalMeter.Load().(meterProviderHolder).mp
+}
+
+// SetMeterProvider is the internal implementation for global.SetMeterProvider.
+func SetMeterProvider(mp metric.MeterProvider) {
+ delegateMeterOnce.Do(func() {
+ current := MeterProvider()
+
+ if current == mp {
+ // Setting the provider to the prior default is nonsense, panic.
+ // Panic is acceptable because we are likely still early in the
+ // process lifetime.
+ panic("invalid MeterProvider, the global instance cannot be reinstalled")
+ } else if def, ok := current.(*meterProvider); ok {
+ def.setDelegate(mp)
+ }
+ })
+ globalMeter.Store(meterProviderHolder{mp: mp})
+}
+
+// TextMapPropagator is the internal implementation for global.TextMapPropagator.
+func TextMapPropagator() otel.TextMapPropagator {
+ return globalPropagators.Load().(propagatorsHolder).tm
+}
+
+// SetTextMapPropagator is the internal implementation for global.SetTextMapPropagator.
+func SetTextMapPropagator(p otel.TextMapPropagator) {
+ globalPropagators.Store(propagatorsHolder{tm: p})
+}
+
+func defaultTracerValue() *atomic.Value {
+ v := &atomic.Value{}
+ v.Store(tracerProviderHolder{tp: &tracerProvider{}})
+ return v
+}
+
+func defaultMeterValue() *atomic.Value {
+ v := &atomic.Value{}
+ v.Store(meterProviderHolder{mp: newMeterProvider()})
+ return v
+}
+
+func defaultPropagatorsValue() *atomic.Value {
+ v := &atomic.Value{}
+ v.Store(propagatorsHolder{tm: getDefaultTextMapPropagator()})
+ return v
+}
+
+// getDefaultTextMapPropagator returns the default TextMapPropagator,
+// configured with W3C trace and baggage propagation.
+func getDefaultTextMapPropagator() otel.TextMapPropagator {
+ return otel.NewCompositeTextMapPropagator()
+}
+
+// ResetForTest restores the initial global state, for testing purposes.
+func ResetForTest() {
+ globalTracer = defaultTracerValue()
+ globalMeter = defaultMeterValue()
+ globalPropagators = defaultPropagatorsValue()
+ delegateMeterOnce = sync.Once{}
+ delegateTraceOnce = sync.Once{}
+}