86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_glean_GleanMemoryDistribution_h
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#define mozilla_glean_GleanMemoryDistribution_h
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#include "mozilla/dom/BindingDeclarations.h"
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#include "mozilla/glean/bindings/DistributionData.h"
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#include "mozilla/glean/bindings/GleanMetric.h"
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#include "mozilla/Maybe.h"
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#include "nsTArray.h"
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namespace mozilla::dom {
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struct GleanDistributionData;
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} // namespace mozilla::dom
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namespace mozilla::glean {
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namespace impl {
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class MemoryDistributionMetric {
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public:
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constexpr explicit MemoryDistributionMetric(uint32_t aId) : mId(aId) {}
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/*
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* Accumulates the provided sample in the metric.
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*
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* @param aSample The sample to be recorded by the metric. The sample is
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* assumed to be in the confgured memory unit of the metric.
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*
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* Notes: Values bigger than 1 Terabyte (2^40 bytes) are truncated and an
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* InvalidValue error is recorded.
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*/
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void Accumulate(size_t aSample) const;
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/**
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* **Test-only API**
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*
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* Gets the currently stored value as a DistributionData.
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*
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* This function will attempt to await the last parent-process task (if any)
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* writing to the the metric's storage engine before returning a value.
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* This function will not wait for data from child processes.
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*
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* This doesn't clear the stored value.
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* Parent process only. Panics in child processes.
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*
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* @param aPingName The (optional) name of the ping to retrieve the metric
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* for. Defaults to the first value in `send_in_pings`.
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*
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* @return value of the stored metric, or Nothing() if there is no value.
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*/
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Result<Maybe<DistributionData>, nsCString> TestGetValue(
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const nsACString& aPingName = nsCString()) const;
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private:
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const uint32_t mId;
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};
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} // namespace impl
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class GleanMemoryDistribution final : public GleanMetric {
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public:
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explicit GleanMemoryDistribution(uint64_t aId, nsISupports* aParent)
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: GleanMetric(aParent), mMemoryDist(aId) {}
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virtual JSObject* WrapObject(
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JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override final;
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void Accumulate(uint64_t aSample);
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void TestGetValue(const nsACString& aPingName,
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dom::Nullable<dom::GleanDistributionData>& aRetval,
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ErrorResult& aRv);
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private:
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virtual ~GleanMemoryDistribution() = default;
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const impl::MemoryDistributionMetric mMemoryDist;
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};
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} // namespace mozilla::glean
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#endif /* mozilla_glean_GleanMemoryDistribution_h */
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