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about:startup - cache app launch timestamp

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This commit is contained in:
Daniel Brooks 2010-10-24 11:24:09 -05:00
parent 3c414bd688
commit d1dc9b3fdb
1 changed files with 9 additions and 3 deletions
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12
toolkit/xre/nsAppRunner.cpp
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@ -839,6 +839,12 @@ nsXULAppInfo::InvalidateCachesOnRestart()
/* readonly attribute unsigned long launchTimestamp; */
NS_IMETHODIMP nsXULAppInfo::GetLaunchTimestamp(PRUint64 *aTimestamp)
{
static PRUint64 cached = 0;
if (cached)
{
*aTimestamp = cached;
return NS_OK;
}
#ifdef XP_UNIX
FILE *uptime;
long tickspersecond = sysconf(_SC_CLK_TCK);
@ -870,7 +876,7 @@ NS_IMETHODIMP nsXULAppInfo::GetLaunchTimestamp(PRUint64 *aTimestamp)
"%*u %*u %*u %*u %*u %*d %*d %*d %*d %llu",
&starttime);
*aTimestamp = boottime + ((starttime / tickspersecond) * PR_USEC_PER_SEC);
*aTimestamp = cached = boottime + ((starttime / tickspersecond) * PR_USEC_PER_SEC);;
return NS_OK;
#elif XP_WIN
FILETIME start, foo, bar, baz;
@ -880,9 +886,9 @@ NS_IMETHODIMP nsXULAppInfo::GetLaunchTimestamp(PRUint64 *aTimestamp)
// copied from NSPR _PR_FileTimeToPRTime
CopyMemory(aTimestamp, &start, sizeof(PRTime));
#ifdef __GNUC__
*aTimestamp = (*aTimestamp - 116444736000000000LL) / 10LL;
*aTimestamp = cached = (*aTimestamp - 116444736000000000LL) / 10LL;
#else
*aTimestamp = (*aTimestamp - 116444736000000000i64) / 10i64;
*aTimestamp = cached = (*aTimestamp - 116444736000000000i64) / 10i64;
#endif
return NS_OK;
}