зеркало из https://github.com/mozilla/gecko-dev.git
332 строки
8.2 KiB
C
332 строки
8.2 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/*
|
|
* The contents of this file are subject to the Mozilla 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/MPL/
|
|
*
|
|
* 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 the Netscape Portable Runtime (NSPR).
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998-2000 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the
|
|
* terms of the GNU General Public License Version 2 or later (the
|
|
* "GPL"), in which case the provisions of the GPL are applicable
|
|
* instead of those above. If you wish to allow use of your
|
|
* version of this file only under the terms of the GPL and not to
|
|
* allow others to use your version of this file under the MPL,
|
|
* indicate your decision by deleting the provisions above and
|
|
* replace them with the notice and other provisions required by
|
|
* the GPL. If you do not delete the provisions above, a recipient
|
|
* may use your version of this file under either the MPL or the
|
|
* GPL.
|
|
*/
|
|
|
|
/***********************************************************************
|
|
** 1996 - Netscape Communications Corporation
|
|
**
|
|
** Name: cvar.c
|
|
**
|
|
** Description: Tests Condition Variable Operations
|
|
**
|
|
** Modification History:
|
|
** 13-May-97 AGarcia- Converted the test to accomodate the debug_mode flag.
|
|
** The debug mode will print all of the printfs associated with this test.
|
|
** The regress mode will be the default mode. Since the regress tool limits
|
|
** the output to a one line status:PASS or FAIL,all of the printf statements
|
|
** have been handled with an if (debug_mode) statement.
|
|
** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to
|
|
** recognize the return code from tha main program.
|
|
** 12-June-97 Revert to return code 0 and 1.
|
|
***********************************************************************/
|
|
|
|
/***********************************************************************
|
|
** Includes
|
|
***********************************************************************/
|
|
|
|
#include "nspr.h"
|
|
|
|
/* Used to get the command line option */
|
|
#include "plgetopt.h"
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#ifdef XP_MAC
|
|
#include "prlog.h"
|
|
#define printf PR_LogPrint
|
|
extern void SetupMacPrintfLog(char *logFile);
|
|
#endif
|
|
|
|
PRMonitor *mon;
|
|
#define DEFAULT_COUNT 1000
|
|
PRInt32 count = 0;
|
|
PRIntn debug_mode;
|
|
|
|
#define kQSIZE 1
|
|
|
|
typedef struct {
|
|
PRLock *bufLock;
|
|
int startIdx;
|
|
int numFull;
|
|
PRCondVar *notFull;
|
|
PRCondVar *notEmpty;
|
|
void *data[kQSIZE];
|
|
} CircBuf;
|
|
|
|
static PRBool failed = PR_FALSE;
|
|
|
|
/*
|
|
** NewCB creates and initializes a new circular buffer.
|
|
*/
|
|
static CircBuf* NewCB(void)
|
|
{
|
|
CircBuf *cbp;
|
|
|
|
cbp = PR_NEW(CircBuf);
|
|
if (cbp == NULL)
|
|
return (NULL);
|
|
|
|
cbp->bufLock = PR_NewLock();
|
|
cbp->startIdx = 0;
|
|
cbp->numFull = 0;
|
|
cbp->notFull = PR_NewCondVar(cbp->bufLock);
|
|
cbp->notEmpty = PR_NewCondVar(cbp->bufLock);
|
|
|
|
return (cbp);
|
|
}
|
|
|
|
/*
|
|
** DeleteCB frees a circular buffer.
|
|
*/
|
|
static void DeleteCB(CircBuf *cbp)
|
|
{
|
|
PR_DestroyLock(cbp->bufLock);
|
|
PR_DestroyCondVar(cbp->notFull);
|
|
PR_DestroyCondVar(cbp->notEmpty);
|
|
PR_DELETE(cbp);
|
|
}
|
|
|
|
|
|
/*
|
|
** PutCBData puts new data on the queue. If the queue is full, it waits
|
|
** until there is room.
|
|
*/
|
|
static void PutCBData(CircBuf *cbp, void *data)
|
|
{
|
|
PR_Lock(cbp->bufLock);
|
|
/* wait while the buffer is full */
|
|
while (cbp->numFull == kQSIZE)
|
|
PR_WaitCondVar(cbp->notFull,PR_INTERVAL_NO_TIMEOUT);
|
|
cbp->data[(cbp->startIdx + cbp->numFull) % kQSIZE] = data;
|
|
cbp->numFull += 1;
|
|
|
|
/* let a waiting reader know that there is data */
|
|
PR_NotifyCondVar(cbp->notEmpty);
|
|
PR_Unlock(cbp->bufLock);
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
** GetCBData gets the oldest data on the queue. If the queue is empty, it waits
|
|
** until new data appears.
|
|
*/
|
|
static void* GetCBData(CircBuf *cbp)
|
|
{
|
|
void *data;
|
|
|
|
PR_Lock(cbp->bufLock);
|
|
/* wait while the buffer is empty */
|
|
while (cbp->numFull == 0)
|
|
PR_WaitCondVar(cbp->notEmpty,PR_INTERVAL_NO_TIMEOUT);
|
|
data = cbp->data[cbp->startIdx];
|
|
cbp->startIdx =(cbp->startIdx + 1) % kQSIZE;
|
|
cbp->numFull -= 1;
|
|
|
|
/* let a waiting writer know that there is room */
|
|
PR_NotifyCondVar(cbp->notFull);
|
|
PR_Unlock(cbp->bufLock);
|
|
|
|
return (data);
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
|
|
static int alive;
|
|
|
|
static void PR_CALLBACK CXReader(void *arg)
|
|
{
|
|
CircBuf *cbp = (CircBuf *)arg;
|
|
PRInt32 i, n;
|
|
void *data;
|
|
|
|
n = count / 2;
|
|
for (i = 0; i < n; i++) {
|
|
data = GetCBData(cbp);
|
|
if ((int)data != i)
|
|
if (debug_mode) printf("data mismatch at for i = %d usec\n", i);
|
|
}
|
|
|
|
PR_EnterMonitor(mon);
|
|
--alive;
|
|
PR_Notify(mon);
|
|
PR_ExitMonitor(mon);
|
|
}
|
|
|
|
static void PR_CALLBACK CXWriter(void *arg)
|
|
{
|
|
CircBuf *cbp = (CircBuf *)arg;
|
|
PRInt32 i, n;
|
|
|
|
n = count / 2;
|
|
for (i = 0; i < n; i++)
|
|
PutCBData(cbp, (void *)i);
|
|
|
|
PR_EnterMonitor(mon);
|
|
--alive;
|
|
PR_Notify(mon);
|
|
PR_ExitMonitor(mon);
|
|
}
|
|
|
|
static void CondWaitContextSwitch(PRThreadScope scope1, PRThreadScope scope2)
|
|
{
|
|
PRThread *t1, *t2;
|
|
CircBuf *cbp;
|
|
|
|
PR_EnterMonitor(mon);
|
|
|
|
alive = 2;
|
|
|
|
cbp = NewCB();
|
|
|
|
t1 = PR_CreateThread(PR_USER_THREAD,
|
|
CXReader, cbp,
|
|
PR_PRIORITY_NORMAL,
|
|
scope1,
|
|
PR_UNJOINABLE_THREAD,
|
|
0);
|
|
PR_ASSERT(t1);
|
|
t2 = PR_CreateThread(PR_USER_THREAD,
|
|
CXWriter, cbp,
|
|
PR_PRIORITY_NORMAL,
|
|
scope2,
|
|
PR_UNJOINABLE_THREAD,
|
|
0);
|
|
PR_ASSERT(t2);
|
|
|
|
/* Wait for both of the threads to exit */
|
|
while (alive) {
|
|
PR_Wait(mon, PR_INTERVAL_NO_TIMEOUT);
|
|
}
|
|
|
|
DeleteCB(cbp);
|
|
|
|
PR_ExitMonitor(mon);
|
|
}
|
|
|
|
static void CondWaitContextSwitchUU(void)
|
|
{
|
|
CondWaitContextSwitch(PR_LOCAL_THREAD, PR_LOCAL_THREAD);
|
|
}
|
|
|
|
static void CondWaitContextSwitchUK(void)
|
|
{
|
|
CondWaitContextSwitch(PR_LOCAL_THREAD, PR_GLOBAL_THREAD);
|
|
}
|
|
|
|
static void CondWaitContextSwitchKK(void)
|
|
{
|
|
CondWaitContextSwitch(PR_GLOBAL_THREAD, PR_GLOBAL_THREAD);
|
|
}
|
|
|
|
/************************************************************************/
|
|
|
|
static void Measure(void (*func)(void), const char *msg)
|
|
{
|
|
PRIntervalTime start, stop;
|
|
double d;
|
|
|
|
start = PR_IntervalNow();
|
|
(*func)();
|
|
stop = PR_IntervalNow();
|
|
|
|
d = (double)PR_IntervalToMicroseconds(stop - start);
|
|
|
|
if (debug_mode) printf("%40s: %6.2f usec\n", msg, d / count);
|
|
|
|
if (0 == d) failed = PR_TRUE;
|
|
}
|
|
|
|
static PRIntn PR_CALLBACK RealMain(int argc, char **argv)
|
|
{
|
|
/* The command line argument: -d is used to determine if the test is being run
|
|
in debug mode. The regress tool requires only one line output:PASS or FAIL.
|
|
All of the printfs associated with this test has been handled with a if (debug_mode)
|
|
test.
|
|
Usage: test_name [-d] [-c n]
|
|
*/
|
|
PLOptStatus os;
|
|
PLOptState *opt = PL_CreateOptState(argc, argv, "dc:");
|
|
while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
|
|
{
|
|
if (PL_OPT_BAD == os) continue;
|
|
switch (opt->option)
|
|
{
|
|
case 'd': /* debug mode */
|
|
debug_mode = 1;
|
|
break;
|
|
case 'c': /* loop count */
|
|
count = atoi(opt->value);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
PL_DestroyOptState(opt);
|
|
|
|
if (0 == count) count = DEFAULT_COUNT;
|
|
|
|
#ifdef XP_MAC
|
|
SetupMacPrintfLog("cvar.log");
|
|
debug_mode = 1;
|
|
#endif
|
|
|
|
mon = PR_NewMonitor();
|
|
|
|
Measure(CondWaitContextSwitchUU, "cond var wait context switch- user/user");
|
|
Measure(CondWaitContextSwitchUK, "cond var wait context switch- user/kernel");
|
|
Measure(CondWaitContextSwitchKK, "cond var wait context switch- kernel/kernel");
|
|
|
|
PR_DestroyMonitor(mon);
|
|
|
|
if (debug_mode) printf("%s\n", (failed) ? "FAILED" : "PASSED");
|
|
|
|
if(failed)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
|
|
PRIntn main(PRIntn argc, char *argv[])
|
|
{
|
|
PRIntn rv;
|
|
|
|
PR_STDIO_INIT();
|
|
rv = PR_Initialize(RealMain, argc, argv, 0);
|
|
return rv;
|
|
} /* main */
|