gecko-dev/xpcom/ds/nsTimelineService.cpp

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Исходник Обычный вид История

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsTimelineService.h"
#include "prlong.h"
#include "prprf.h"
#include "prenv.h"
#include "plhash.h"
#include "prlock.h"
#include "prinit.h"
#include "prinrval.h"
#ifdef MOZ_TIMELINE
#define MAXINDENT 20
#ifdef XP_MAC
static PRIntervalTime initInterval = 0;
#endif
static PRTime initTime = 0;
static PRFileDesc *timelineFD = PR_STDERR;
static PRHashTable *timers;
static PRLock *timerLock;
static int indent;
static PRBool gTimelineDisabled = PR_TRUE;
/* Implementation file */
NS_IMPL_ISUPPORTS1(nsTimelineService, nsITimelineService)
static PRTime Now(void);
/*
* Timer structure stored in a hash table to keep track of named
* timers.
*/
class nsTimelineServiceTimer {
public:
nsTimelineServiceTimer();
~nsTimelineServiceTimer();
void start();
/*
* Caller passes in "now" rather than having us calculate it so
* that we can avoid including timer overhead in the time being
* measured.
*/
void stop(PRTime now);
void reset();
PRTime getAccum();
PRTime getAccum(PRTime now);
private:
PRTime mAccum;
PRTime mStart;
PRInt32 mRunning;
PRLock *mLock;
};
nsTimelineServiceTimer::nsTimelineServiceTimer()
: mAccum(LL_ZERO), mStart(LL_ZERO), mRunning(0), mLock(PR_NewLock())
{
}
nsTimelineServiceTimer::~nsTimelineServiceTimer()
{
PR_DestroyLock(mLock);
}
void nsTimelineServiceTimer::start()
{
PR_Lock(mLock);
if (!mRunning) {
mStart = Now();
}
mRunning++;
PR_Unlock(mLock);
}
void nsTimelineServiceTimer::stop(PRTime now)
{
PR_Lock(mLock);
mRunning--;
if (mRunning == 0) {
PRTime delta, accum;
LL_SUB(delta, now, mStart);
LL_ADD(accum, mAccum, delta);
mAccum = accum;
}
PR_Unlock(mLock);
}
void nsTimelineServiceTimer::reset()
{
mStart = 0;
mAccum = 0;
}
PRTime nsTimelineServiceTimer::getAccum()
{
PRTime accum;
PR_Lock(mLock);
if (!mRunning) {
accum = mAccum;
} else {
PRTime delta;
LL_SUB(delta, Now(), mStart);
LL_ADD(accum, mAccum, delta);
}
PR_Unlock(mLock);
return accum;
}
PRTime nsTimelineServiceTimer::getAccum(PRTime now)
{
PRTime accum;
PR_Lock(mLock);
if (!mRunning) {
accum = mAccum;
} else {
PRTime delta;
LL_SUB(delta, now, mStart);
LL_ADD(accum, mAccum, delta);
}
PR_Unlock(mLock);
return accum;
}
#ifdef XP_MAC
/*
* PR_Now() on the Mac only gives us a resolution of seconds. Using
* PR_IntervalNow() gives us better resolution. with the drawback that
* the timeline is only good for about six hours.
*
* PR_IntervalNow() occasionally exhibits discontinuities on Windows,
* so we only use it on the Mac. Bleah!
*/
static PRTime Now(void)
{
PRIntervalTime numTicks = PR_IntervalNow() - initInterval;
PRTime now;
LL_ADD(now, initTime, PR_IntervalToMilliseconds(numTicks) * 1000);
return now;
}
#else
static PRTime Now(void)
{
return PR_Now();
}
#endif
static void TimelineInit(void)
{
char *timeStr;
char *fileName;
PRInt32 secs, msecs;
PRFileDesc *fd;
PRInt64 tmp1, tmp2;
timeStr = PR_GetEnv("NS_TIMELINE_INIT_TIME");
#ifdef XP_MAC
initInterval = PR_IntervalNow();
#endif
if (timeStr != NULL && 2 == PR_sscanf(timeStr, "%d.%d", &secs, &msecs)) {
LL_MUL(tmp1, (PRInt64)secs, 1000000);
LL_MUL(tmp2, (PRInt64)msecs, 1000);
LL_ADD(initTime, tmp1, tmp2);
#ifdef XP_MAC
initInterval -= PR_MicrosecondsToInterval(
(PRUint32)(PR_Now() - initTime));
#endif
} else {
initTime = PR_Now();
}
#ifdef XP_MAC
fileName = "timeline.txt";
#else
fileName = PR_GetEnv("NS_TIMELINE_LOG_FILE");
#endif
if (fileName != NULL
&& (fd = PR_Open(fileName, PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE,
0666)) != NULL) {
timelineFD = fd;
PR_fprintf(fd,
"NOTE: due to threading and asynchrony, the indentation\n"
"that you see does not necessarily correspond to nesting\n"
"in the code.\n\n");
}
// Runtime disable of timeline
if (PR_GetEnv("NS_TIMELINE_ENABLE"))
gTimelineDisabled = PR_FALSE;
}
static void ParseTime(PRTime tm, PRInt32& secs, PRInt32& msecs)
{
PRTime llsecs, llmsecs, tmp;
LL_DIV(llsecs, tm, 1000000);
LL_MOD(tmp, tm, 1000000);
LL_DIV(llmsecs, tmp, 1000);
LL_L2I(secs, llsecs);
LL_L2I(msecs, llmsecs);
}
static char *Indent(char *buf)
{
int amount = indent;
if (amount > MAXINDENT) {
amount = MAXINDENT;
}
if (amount < 0) {
amount = 0;
indent = 0;
PR_Write(timelineFD, "indent underflow!\n", 18);
}
while (amount--) {
*buf++ = ' ';
}
return buf;
}
static void PrintTime(PRTime tm, const char *text, va_list args)
{
PRInt32 secs, msecs;
char pbuf[500], *pc, tbuf[500];
ParseTime(tm, secs, msecs);
// snprintf/write rather than fprintf because we don't want
// messages from multiple threads to garble one another.
pc = Indent(pbuf);
PR_vsnprintf(pc, sizeof pbuf - (pc - pbuf), text, args);
PR_snprintf(tbuf, sizeof tbuf, "%05d.%03d: %s\n",
secs, msecs, pbuf);
PR_Write(timelineFD, tbuf, strlen(tbuf));
}
/*
* Make this public if we need it.
*/
static nsresult NS_TimelineMarkV(const char *text, va_list args)
{
PRTime elapsed,tmp;
if (LL_IS_ZERO(initTime)) {
TimelineInit();
}
tmp = Now();
LL_SUB(elapsed, tmp, initTime);
PrintTime(elapsed, text, args);
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineForceMark(const char *text, ...)
{
va_list args;
va_start(args, text);
NS_TimelineMarkV(text, args);
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineMark(const char *text, ...)
{
va_list args;
va_start(args, text);
if (LL_IS_ZERO(initTime)) {
TimelineInit();
}
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
NS_TimelineMarkV(text, args);
return NS_OK;
}
/*
* PRCallOnceFN that initializes stuff for the timing service.
*/
static PRStatus InitTimers(void)
{
timerLock = PR_NewLock();
if (timerLock == NULL) {
return PR_FAILURE;
}
timers = PL_NewHashTable(100, PL_HashString, PL_CompareStrings,
PL_CompareValues, NULL, NULL);
return timers != NULL ? PR_SUCCESS : PR_FAILURE;
}
PR_IMPLEMENT(nsresult) NS_TimelineStartTimer(const char *timerName)
{
static PRCallOnceType once;
PR_CallOnce(&once, InitTimers);
if (timers == NULL) {
return NS_ERROR_FAILURE;
}
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
PR_Lock(timerLock);
nsTimelineServiceTimer *timer
= (nsTimelineServiceTimer *)PL_HashTableLookup(timers, timerName);
if (timer == NULL) {
timer = new nsTimelineServiceTimer;
PL_HashTableAdd(timers, timerName, timer);
}
PR_Unlock(timerLock);
timer->start();
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineStopTimer(const char *timerName)
{
if (timers == NULL) {
return NS_ERROR_FAILURE;
}
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
/*
* Strange-looking now/timer->stop() interaction is to avoid
* including time spent in PR_Lock and PL_HashTableLookup in the
* timer.
*/
PRTime now = Now();
PR_Lock(timerLock);
nsTimelineServiceTimer *timer
= (nsTimelineServiceTimer *)PL_HashTableLookup(timers, timerName);
PR_Unlock(timerLock);
if (timer == NULL) {
return NS_ERROR_FAILURE;
}
timer->stop(now);
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineMarkTimer(const char *timerName, const char *str)
{
if (timers == NULL) {
return NS_ERROR_FAILURE;
}
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
PR_Lock(timerLock);
nsTimelineServiceTimer *timer
= (nsTimelineServiceTimer *)PL_HashTableLookup(timers, timerName);
PR_Unlock(timerLock);
if (timer == NULL) {
return NS_ERROR_FAILURE;
}
PRTime accum = timer->getAccum();
char buf[500];
PRInt32 sec, msec;
ParseTime(accum, sec, msec);
if (!str)
PR_snprintf(buf, sizeof buf, "%s total: %d.%03d",
timerName, sec, msec);
else
PR_snprintf(buf, sizeof buf, "%s total: %d.%03d (%s)",
timerName, sec, msec, str);
NS_TimelineMark(buf);
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineResetTimer(const char *timerName)
{
if (timers == NULL) {
return NS_ERROR_FAILURE;
}
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
PR_Lock(timerLock);
nsTimelineServiceTimer *timer
= (nsTimelineServiceTimer *)PL_HashTableLookup(timers, timerName);
PR_Unlock(timerLock);
if (timer == NULL) {
return NS_ERROR_FAILURE;
}
timer->reset();
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineIndent()
{
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
indent++; // Could have threading issues here.
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineOutdent()
{
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
indent--; // Could have threading issues here.
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineEnter(const char *text)
{
nsresult rv = NS_TimelineMark("%s...", text);
if (NS_FAILED(rv)) {
return rv;
}
return NS_TimelineIndent();
}
PR_IMPLEMENT(nsresult) NS_TimelineLeave(const char *text)
{
nsresult rv = NS_TimelineOutdent();
if (NS_FAILED(rv)) {
return rv;
}
return NS_TimelineMark("...%s", text);
}
nsTimelineService::nsTimelineService()
{
NS_INIT_ISUPPORTS();
/* member initializers and constructor code */
}
nsTimelineService::~nsTimelineService()
{
/* destructor code */
}
/* void mark (in string text); */
NS_IMETHODIMP nsTimelineService::Mark(const char *text)
{
return NS_TimelineMark(text);
}
/* void startTimer (in string timerName); */
NS_IMETHODIMP nsTimelineService::StartTimer(const char *timerName)
{
return NS_TimelineStartTimer(timerName);
}
/* void stopTimer (in string timerName); */
NS_IMETHODIMP nsTimelineService::StopTimer(const char *timerName)
{
return NS_TimelineStopTimer(timerName);
}
/* void markTimer (in string timerName, in string text); */
NS_IMETHODIMP nsTimelineService::MarkTimer(const char *timerName)
{
return NS_TimelineMarkTimer(timerName);
}
/* void resetTimer (in string timerName); */
NS_IMETHODIMP nsTimelineService::ResetTimer(const char *timerName)
{
return NS_TimelineResetTimer(timerName);
}
/* void indent (); */
NS_IMETHODIMP nsTimelineService::Indent()
{
return NS_TimelineIndent();
}
/* void outdent (); */
NS_IMETHODIMP nsTimelineService::Outdent()
{
return NS_TimelineOutdent();
}
/* void enter (in string text); */
NS_IMETHODIMP nsTimelineService::Enter(const char *text)
{
return NS_TimelineEnter(text);
}
/* void leave (in string text); */
NS_IMETHODIMP nsTimelineService::Leave(const char *text)
{
return NS_TimelineLeave(text);
}
#endif /* MOZ_TIMELINE */