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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 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
#include "mozilla/glean/bindings/Timespan.h"
#include "nsString.h"
#include "mozilla/Components.h"
#include "mozilla/ResultVariant.h"
#include "mozilla/dom/GleanMetricsBinding.h"
#include "mozilla/glean/bindings/ScalarGIFFTMap.h"
#include "mozilla/glean/fog_ffi_generated.h"
namespace mozilla::glean {
namespace impl {
namespace {
class ScalarIDHashKey : public PLDHashEntryHdr {
public:
using KeyType = const ScalarID&;
using KeyTypePointer = const ScalarID*;
explicit ScalarIDHashKey(KeyTypePointer aKey) : mValue(*aKey) {}
ScalarIDHashKey(ScalarIDHashKey&& aOther)
: PLDHashEntryHdr(std::move(aOther)), mValue(std::move(aOther.mValue)) {}
~ScalarIDHashKey() = default;
KeyType GetKey() const { return mValue; }
bool KeyEquals(KeyTypePointer aKey) const { return *aKey == mValue; }
static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
static PLDHashNumber HashKey(KeyTypePointer aKey) {
return static_cast<std::underlying_type<ScalarID>::type>(*aKey);
}
enum { ALLOW_MEMMOVE = true };
static_assert(std::is_trivially_copyable_v<ScalarID>);
private:
const ScalarID mValue;
};
} // namespace
using TimesToStartsMutex =
StaticDataMutex<UniquePtr<nsTHashMap<ScalarIDHashKey, TimeStamp>>>;
static Maybe<TimesToStartsMutex::AutoLock> GetTimesToStartsLock() {
static TimesToStartsMutex sTimespanStarts("sTimespanStarts");
auto lock = sTimespanStarts.Lock();
// GIFFT will work up to the end of AppShutdownTelemetry.
if (AppShutdown::IsInOrBeyond(ShutdownPhase::XPCOMWillShutdown)) {
return Nothing();
}
if (!*lock) {
*lock = MakeUnique<nsTHashMap<ScalarIDHashKey, TimeStamp>>();
RefPtr<nsIRunnable> cleanupFn = NS_NewRunnableFunction(__func__, [&] {
if (AppShutdown::IsInOrBeyond(ShutdownPhase::XPCOMWillShutdown)) {
auto lock = sTimespanStarts.Lock();
*lock = nullptr; // deletes, see UniquePtr.h
return;
}
RunOnShutdown(
[&] {
auto lock = sTimespanStarts.Lock();
*lock = nullptr; // deletes, see UniquePtr.h
},
ShutdownPhase::XPCOMWillShutdown);
});
// Both getting the main thread and dispatching to it can fail.
// In that event we leak. Grab a pointer so we have something to NS_RELEASE
// in that case.
nsIRunnable* temp = cleanupFn.get();
nsCOMPtr<nsIThread> mainThread;
if (NS_FAILED(NS_GetMainThread(getter_AddRefs(mainThread))) ||
NS_FAILED(mainThread->Dispatch(cleanupFn.forget(),
nsIThread::DISPATCH_NORMAL))) {
// Failed to dispatch cleanup routine.
// First, un-leak the runnable (but only if we actually attempted
// dispatch)
if (!cleanupFn) {
NS_RELEASE(temp);
}
// Next, cleanup immediately, and allow metrics to try again later.
*lock = nullptr;
return Nothing();
}
}
return Some(std::move(lock));
}
void TimespanMetric::Start() const {
auto optScalarId = ScalarIdForMetric(mId);
if (optScalarId) {
auto scalarId = optScalarId.extract();
GetTimesToStartsLock().apply([&](const auto& lock) {
(void)NS_WARN_IF(lock.ref()->Remove(scalarId));
lock.ref()->InsertOrUpdate(scalarId, TimeStamp::Now());
});
}
fog_timespan_start(mId);
}
void TimespanMetric::Stop() const {
auto optScalarId = ScalarIdForMetric(mId);
if (optScalarId) {
auto scalarId = optScalarId.extract();
GetTimesToStartsLock().apply([&](const auto& lock) {
auto optStart = lock.ref()->Extract(scalarId);
if (!NS_WARN_IF(!optStart)) {
double delta = (TimeStamp::Now() - optStart.extract()).ToMilliseconds();
uint32_t theDelta = static_cast<uint32_t>(delta);
if (delta > std::numeric_limits<uint32_t>::max()) {
theDelta = std::numeric_limits<uint32_t>::max();
} else if (MOZ_UNLIKELY(delta < 0)) {
theDelta = 0;
}
Telemetry::ScalarSet(scalarId, theDelta);
}
});
}
fog_timespan_stop(mId);
}
void TimespanMetric::Cancel() const {
auto optScalarId = ScalarIdForMetric(mId);
if (optScalarId) {
auto scalarId = optScalarId.extract();
GetTimesToStartsLock().apply(
[&](const auto& lock) { lock.ref()->Remove(scalarId); });
}
fog_timespan_cancel(mId);
}
void TimespanMetric::SetRaw(uint32_t aDuration) const {
auto optScalarId = ScalarIdForMetric(mId);
if (optScalarId) {
auto scalarId = optScalarId.extract();
Telemetry::ScalarSet(scalarId, aDuration);
}
fog_timespan_set_raw(mId, aDuration);
}
Result<Maybe<uint64_t>, nsCString> TimespanMetric::TestGetValue(
const nsACString& aPingName) const {
nsCString err;
if (fog_timespan_test_get_error(mId, &err)) {
return Err(err);
}
if (!fog_timespan_test_has_value(mId, &aPingName)) {
return Maybe<uint64_t>();
}
return Some(fog_timespan_test_get_value(mId, &aPingName));
}
} // namespace impl
/* virtual */
JSObject* GleanTimespan::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return dom::GleanTimespan_Binding::Wrap(aCx, this, aGivenProto);
}
void GleanTimespan::Start() { mTimespan.Start(); }
void GleanTimespan::Stop() { mTimespan.Stop(); }
void GleanTimespan::Cancel() { mTimespan.Cancel(); }
void GleanTimespan::SetRaw(uint32_t aDuration) { mTimespan.SetRaw(aDuration); }
dom::Nullable<uint64_t> GleanTimespan::TestGetValue(const nsACString& aPingName,
ErrorResult& aRv) {
dom::Nullable<uint64_t> ret;
auto result = mTimespan.TestGetValue(aPingName);
if (result.isErr()) {
aRv.ThrowDataError(result.unwrapErr());
return ret;
}
auto optresult = result.unwrap();
if (!optresult.isNothing()) {
ret.SetValue(optresult.value());
}
return ret;
}
} // namespace mozilla::glean