// Constructor
OsProtectEventMgr::OsProtectEventMgr(void* userData,
int initialCount,
int softLimit,
int hardLimit,
int increment)
: mListSem(OsBSem::Q_PRIORITY, OsBSem::FULL)
{
mCurrentCount = 0;
mNext = 0;
mInitialCount = (initialCount > 1) ? initialCount : 10;
mSoftLimit = (initialCount > softLimit) ? initialCount : softLimit;
mHardLimit = (softLimit > hardLimit) ? softLimit : hardLimit;
mIncrement = increment;
if (mHardLimit > initialCount) {
assert(mIncrement>0);
mIncrement = (mIncrement>0) ? mIncrement : 1;
}
mpEvents = new OsProtectedEvent*[mHardLimit];
int i;
for (i=0; i<mHardLimit; i++)
mpEvents[i] = NULL;
OsProtectedEvent* pEvent;
for (i=0; i<mInitialCount; i++)
{
pEvent = new OsProtectedEvent(userData);
if (NULL != pEvent)
{
pEvent->setInUse(FALSE);
mpEvents[i] = pEvent;
mCurrentCount++;
}
}
mAllocs = 0;
mFrees = 0;
}
OsProtectedEvent* OsProtectEventMgr::alloc(void* userData)
{
int i;
OsProtectedEvent* pEvent = NULL;
OsProtectedEvent* ret = NULL;
mListSem.acquire();
for (i=0; ((i<mCurrentCount)&&(NULL==ret)); i++)
{
pEvent = mpEvents[mNext++];
if ((NULL != pEvent) && !pEvent->isInUse())
{
pEvent->setInUse(TRUE);
ret = pEvent;
break;
}
if (mNext >= mCurrentCount) mNext = 0;
}
if (NULL == ret)
{
if (mCurrentCount >= mSoftLimit)
{
OsSysLog::add(FAC_KERNEL, PRI_ERR,
"OsProtectEventMgr::alloc OsProtectedEvent pool exceeds soft limit (%d>%d) ***",
mCurrentCount + 1, mSoftLimit);
}
if (mCurrentCount < mHardLimit)
{
int limit;
mNext = mCurrentCount;
limit = mCurrentCount + mIncrement;
if (limit > mHardLimit) limit = mHardLimit;
for (i=mCurrentCount; i<limit; i++)
{
pEvent = new OsProtectedEvent(userData);
if (NULL != pEvent)
{
pEvent->setInUse(FALSE);
mpEvents[i] = pEvent;
mCurrentCount++;
}
}
ret = mpEvents[mNext];
assert(NULL!=ret);
if ((NULL != ret) && !ret->isInUse())
{
ret->setInUse(TRUE);
}
mNext++;
if (mNext >= mCurrentCount) mNext = 0;
}
else
{
OsSysLog::add(FAC_KERNEL, PRI_CRIT,
"*** OsProtectEventMgr: pool exceeds hard limit (%d) *** ", mHardLimit);
}
}
if (ret != NULL)
mAllocs++;
// If the number of outstanding events is a multiple of 10
if(((mAllocs - mFrees) % (mIncrement/5)) == 0)
{
OsSysLog::add(FAC_KERNEL, PRI_DEBUG, "OsProtectEventMgr::alloc in use: %d pool size: %d num. allocs:%d",
mAllocs - mFrees, mCurrentCount, mAllocs);
}
mListSem.release();
return ret;
}