зеркало из https://github.com/mozilla/gecko-dev.git
89 строки
2.5 KiB
C++
89 строки
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim:set ts=2 sw=2 sts=2 et cindent: */
|
|
/* 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/. */
|
|
|
|
/*
|
|
* Implementation of the OS-independent methods of the TimeStamp class
|
|
*/
|
|
|
|
#include "mozilla/TimeStamp.h"
|
|
#include "prenv.h"
|
|
|
|
namespace mozilla {
|
|
|
|
/**
|
|
* Wrapper class used to initialize static data used by the TimeStamp class
|
|
*/
|
|
struct TimeStampInitialization {
|
|
/**
|
|
* First timestamp taken when the class static initializers are run. This
|
|
* timestamp is used to sanitize timestamps coming from different sources.
|
|
*/
|
|
TimeStamp mFirstTimeStamp;
|
|
|
|
/**
|
|
* Timestamp representing the time when the process was created. This field
|
|
* is populated lazily the first time this information is required and is
|
|
* replaced every time the process is restarted.
|
|
*/
|
|
TimeStamp mProcessCreation;
|
|
|
|
TimeStampInitialization() {
|
|
TimeStamp::Startup();
|
|
mFirstTimeStamp = TimeStamp::Now();
|
|
};
|
|
|
|
~TimeStampInitialization() {
|
|
TimeStamp::Shutdown();
|
|
};
|
|
};
|
|
|
|
static TimeStampInitialization sInitOnce;
|
|
|
|
TimeStamp
|
|
TimeStamp::ProcessCreation(bool& aIsInconsistent)
|
|
{
|
|
aIsInconsistent = false;
|
|
|
|
if (sInitOnce.mProcessCreation.IsNull()) {
|
|
char *mozAppRestart = PR_GetEnv("MOZ_APP_RESTART");
|
|
TimeStamp ts;
|
|
|
|
/* When calling PR_SetEnv() with an empty value the existing variable may
|
|
* be unset or set to the empty string depending on the underlying platform
|
|
* thus we have to check if the variable is present and not empty. */
|
|
if (mozAppRestart && (strcmp(mozAppRestart, "") != 0)) {
|
|
/* Firefox was restarted, use the first time-stamp we've taken as the new
|
|
* process startup time. */
|
|
ts = sInitOnce.mFirstTimeStamp;
|
|
} else {
|
|
TimeStamp now = Now();
|
|
uint64_t uptime = ComputeProcessUptime();
|
|
|
|
ts = now - TimeDuration::FromMicroseconds(uptime);
|
|
|
|
if ((ts > sInitOnce.mFirstTimeStamp) || (uptime == 0)) {
|
|
/* If the process creation timestamp was inconsistent replace it with
|
|
* the first one instead and notify that a telemetry error was
|
|
* detected. */
|
|
aIsInconsistent = true;
|
|
ts = sInitOnce.mFirstTimeStamp;
|
|
}
|
|
}
|
|
|
|
sInitOnce.mProcessCreation = ts;
|
|
}
|
|
|
|
return sInitOnce.mProcessCreation;
|
|
}
|
|
|
|
void
|
|
TimeStamp::RecordProcessRestart()
|
|
{
|
|
sInitOnce.mProcessCreation = TimeStamp();
|
|
}
|
|
|
|
} // namespace mozilla
|