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63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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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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/*
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* Implementation of the OS-independent methods of the TimeStamp class
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*/
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#include "mozilla/TimeStamp.h"
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#include "prenv.h"
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namespace mozilla {
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TimeStamp TimeStamp::sFirstTimeStamp;
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TimeStamp TimeStamp::sProcessCreation;
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TimeStamp
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TimeStamp::ProcessCreation(bool& aIsInconsistent)
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{
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aIsInconsistent = false;
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if (sProcessCreation.IsNull()) {
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char *mozAppRestart = PR_GetEnv("MOZ_APP_RESTART");
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TimeStamp ts;
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/* When calling PR_SetEnv() with an empty value the existing variable may
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* be unset or set to the empty string depending on the underlying platform
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* thus we have to check if the variable is present and not empty. */
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if (mozAppRestart && (strcmp(mozAppRestart, "") != 0)) {
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/* Firefox was restarted, use the first time-stamp we've taken as the new
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* process startup time. */
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ts = sFirstTimeStamp;
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} else {
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TimeStamp now = Now();
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uint64_t uptime = ComputeProcessUptime();
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ts = now - TimeDuration::FromMicroseconds(uptime);
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if ((ts > sFirstTimeStamp) || (uptime == 0)) {
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/* If the process creation timestamp was inconsistent replace it with
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* the first one instead and notify that a telemetry error was
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* detected. */
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aIsInconsistent = true;
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ts = sFirstTimeStamp;
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}
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}
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sProcessCreation = ts;
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}
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return sProcessCreation;
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}
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void
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TimeStamp::RecordProcessRestart()
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{
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sProcessCreation = TimeStamp();
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}
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} // namespace mozilla
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