static void parititonAllocBaseInit(PartitionRootBase* root)
{
ASSERT(!root->initialized);
spinLockLock(&PartitionRootBase::gInitializedLock);
if (!PartitionRootBase::gInitialized) {
PartitionRootBase::gInitialized = true;
// We mark the seed page as free to make sure it is skipped by our
// logic to find a new active page.
PartitionRootBase::gPagedBucket.activePagesHead = &PartitionRootGeneric::gSeedPage;
}
spinLockUnlock(&PartitionRootBase::gInitializedLock);
root->initialized = true;
root->totalSizeOfSuperPages = 0;
root->nextSuperPage = 0;
root->nextPartitionPage = 0;
root->nextPartitionPageEnd = 0;
root->firstExtent = 0;
root->currentExtent = 0;
memset(&root->globalEmptyPageRing, '\0', sizeof(root->globalEmptyPageRing));
root->globalEmptyPageRingIndex = 0;
// This is a "magic" value so we can test if a root pointer is valid.
root->invertedSelf = ~reinterpret_cast<uintptr_t>(root);
}
static void threadMain(volatile char* buffer)
{
for (int i = 0; i < 500000; ++i) {
spinLockLock(&lock);
changeAndCheckBuffer(buffer);
spinLockUnlock(&lock);
}
}
void Partitions::initialize()
{
static int lock = 0;
// Guard against two threads hitting here in parallel.
spinLockLock(&lock);
if (!s_initialized) {
m_bufferAllocator.init();
s_initialized = true;
}
spinLockUnlock(&lock);
}
void Partitions::initialize()
{
spinLockLock(&s_initializationLock);
if (!s_initialized) {
partitionAllocGlobalInit(&Partitions::handleOutOfMemory);
m_fastMallocAllocator.init();
m_bufferAllocator.init();
m_nodeAllocator.init();
m_layoutAllocator.init();
s_initialized = true;
}
spinLockUnlock(&s_initializationLock);
}
void Partitions::shutdown()
{
spinLockLock(&s_initializationLock);
// We could ASSERT here for a memory leak within the partition, but it leads
// to very hard to diagnose ASSERTs, so it's best to leave leak checking for
// the valgrind and heapcheck bots, which run without partitions.
if (s_initialized) {
(void) m_layoutAllocator.shutdown();
(void) m_nodeAllocator.shutdown();
(void) m_bufferAllocator.shutdown();
(void) m_fastMallocAllocator.shutdown();
}
spinLockUnlock(&s_initializationLock);
}
uint32_t ranval(ranctx* x)
{
spinLockLock(&x->lock);
if (UNLIKELY(!x->initialized)) {
x->initialized = true;
char c;
uint32_t seed = static_cast<uint32_t>(reinterpret_cast<uintptr_t>(&c));
seed ^= static_cast<uint32_t>(getCurrentProcessID());
x->a = 0xf1ea5eed;
x->b = x->c = x->d = seed;
for (int i = 0; i < 20; ++i) {
(void) ranvalInternal(x);
}
}
uint32_t ret = ranvalInternal(x);
spinLockUnlock(&x->lock);
return ret;
}