bug1test.c revision 677833bc953b6cb418c701facbdcf4aa18d6c44e
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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* The Original Code is the Netscape Portable Runtime (NSPR).
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/*
Attached is a test program that uses the nspr1 to demonstrate a bug
under NT4.0. The fix has already been mentioned (add a ResetEvent just
before leaving the critical section in _PR_CondWait in hwmon.c).
*/
#include "prthread.h"
#include "prtypes.h"
#include "prinit.h"
#include "prmon.h"
#include "prlog.h"
typedef struct Arg_s
{
PRInt32 a, b;
} Arg_t;
// stats
{
PR_Sleep(0);
// randomize delay a bit
// consume a bunch of cpu cycles
;
PR_Sleep(0);
}
void doWriteThread (void* arg)
{
PR_Sleep(0);
while (1)
{
// -- enter write lock
if (0 < gReading) // wait for read locks to go away
{
while (0 < gReading)
}
// -- write lock entered
gCounter++;
spin (aWorkDelay);
// -- exit write lock
// if (0 < gReadWaiting) // notify waiting reads (do it anyway to show off the CondWait bug)
// -- write lock exited
spin (aWaitDelay);
}
}
void doReadThread (void* arg)
{
PR_Sleep(0);
while (1)
{
// -- enter read lock
if (0 < gWriteWaiting) // give up the monitor to waiting writes
{
gReadWaiting++;
while (0 < gWriteWaiting)
gReadWaiting--;
}
gReading++;
gReads++; // stats
// -- read lock entered
spin (aWorkDelay);
// -- exit read lock
gReading--;
// if ((0 == gReading) && (0 < gWriteWaiting)) // notify waiting writes (do it anyway to show off the CondWait bug)
// -- read lock exited
spin (aWaitDelay);
}
}
void fireThread (
{
}
{
gMonitor = PR_NewMonitor ();
while (1)
{
// print some stats, not threadsafe, informative only
printf ("\ntick %d writes (+%d), %d reads (+%d) [max %d, %d, %d]",
}
return 0;
}
{
}
{
}
/* bug1test.c */