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-rw-r--r--dom/media/eme/DetailedPromise.cpp105
1 files changed, 105 insertions, 0 deletions
diff --git a/dom/media/eme/DetailedPromise.cpp b/dom/media/eme/DetailedPromise.cpp
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+++ b/dom/media/eme/DetailedPromise.cpp
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "DetailedPromise.h"
+#include "mozilla/dom/DOMException.h"
+#include "nsPrintfCString.h"
+
+namespace mozilla {
+namespace dom {
+
+DetailedPromise::DetailedPromise(nsIGlobalObject* aGlobal,
+ const nsACString& aName)
+ : Promise(aGlobal)
+ , mName(aName)
+ , mResponded(false)
+ , mStartTime(TimeStamp::Now())
+{
+}
+
+DetailedPromise::DetailedPromise(nsIGlobalObject* aGlobal,
+ const nsACString& aName,
+ Telemetry::ID aSuccessLatencyProbe,
+ Telemetry::ID aFailureLatencyProbe)
+ : DetailedPromise(aGlobal, aName)
+{
+ mSuccessLatencyProbe.Construct(aSuccessLatencyProbe);
+ mFailureLatencyProbe.Construct(aFailureLatencyProbe);
+}
+
+DetailedPromise::~DetailedPromise()
+{
+ // It would be nice to assert that mResponded is identical to
+ // GetPromiseState() == PromiseState::Rejected. But by now we've been
+ // unlinked, so don't have a reference to our actual JS Promise object
+ // anymore.
+ MaybeReportTelemetry(Failed);
+}
+
+void
+DetailedPromise::MaybeReject(nsresult aArg, const nsACString& aReason)
+{
+ nsPrintfCString msg("%s promise rejected 0x%x '%s'", mName.get(), aArg,
+ PromiseFlatCString(aReason).get());
+ EME_LOG(msg.get());
+
+ MaybeReportTelemetry(Failed);
+
+ LogToBrowserConsole(NS_ConvertUTF8toUTF16(msg));
+
+ ErrorResult rv;
+ rv.ThrowDOMException(aArg, aReason);
+ Promise::MaybeReject(rv);
+}
+
+void
+DetailedPromise::MaybeReject(ErrorResult&, const nsACString& aReason)
+{
+ NS_NOTREACHED("nsresult expected in MaybeReject()");
+}
+
+/* static */ already_AddRefed<DetailedPromise>
+DetailedPromise::Create(nsIGlobalObject* aGlobal,
+ ErrorResult& aRv,
+ const nsACString& aName)
+{
+ RefPtr<DetailedPromise> promise = new DetailedPromise(aGlobal, aName);
+ promise->CreateWrapper(nullptr, aRv);
+ return aRv.Failed() ? nullptr : promise.forget();
+}
+
+/* static */ already_AddRefed<DetailedPromise>
+DetailedPromise::Create(nsIGlobalObject* aGlobal,
+ ErrorResult& aRv,
+ const nsACString& aName,
+ Telemetry::ID aSuccessLatencyProbe,
+ Telemetry::ID aFailureLatencyProbe)
+{
+ RefPtr<DetailedPromise> promise = new DetailedPromise(aGlobal, aName, aSuccessLatencyProbe, aFailureLatencyProbe);
+ promise->CreateWrapper(nullptr, aRv);
+ return aRv.Failed() ? nullptr : promise.forget();
+}
+
+void
+DetailedPromise::MaybeReportTelemetry(Status aStatus)
+{
+ if (mResponded) {
+ return;
+ }
+ mResponded = true;
+ if (!mSuccessLatencyProbe.WasPassed() || !mFailureLatencyProbe.WasPassed()) {
+ return;
+ }
+ uint32_t latency = (TimeStamp::Now() - mStartTime).ToMilliseconds();
+ EME_LOG("%s %s latency %ums reported via telemetry", mName.get(),
+ ((aStatus == Succeeded) ? "succcess" : "failure"), latency);
+ Telemetry::ID tid = (aStatus == Succeeded) ? mSuccessLatencyProbe.Value()
+ : mFailureLatencyProbe.Value();
+ Telemetry::Accumulate(tid, latency);
+}
+
+} // namespace dom
+} // namespace mozilla