/*
* Initialize stage io thread control structure. Structure is used
* to control data movement between io threads.
*/
static void
initIoThread()
{
size_t size;
size = sizeof (IoThreadInfo_t);
SamMalloc(IoThread, size);
memset(IoThread, 0, size);
ThreadStateInit(&IoThread->io_readReady);
ThreadStateInit(&IoThread->io_readDone);
ThreadStateInit(&IoThread->io_moveReady);
ThreadStateInit(&IoThread->io_moveDone);
if (is_disk(Instance->ci_media)) {
if (is_stk5800(Instance->ci_media)) {
IoThread->io_flags |= IO_stk5800;
} else {
IoThread->io_flags |= IO_disk;
}
} else if (Instance->ci_flags & CI_samremote) {
IoThread->io_flags |= IO_samremote;
}
}
void BuildQueueInit(BuildQueue* queue, const BuildQueueConfig* config)
{
CHECK(config->m_MaxExpensiveCount > 0 && config->m_MaxExpensiveCount <= config->m_ThreadCount);
MutexInit(&queue->m_Lock);
CondInit(&queue->m_WorkAvailable);
// Compute queue capacity. Allocate space for a power of two number of
// indices that's at least one larger than the max number of nodes. Because
// the queue is treated as a ring buffer, we want W=R to mean an empty
// buffer.
uint32_t capacity = NextPowerOfTwo(config->m_MaxNodes + 1);
MemAllocHeap* heap = config->m_Heap;
queue->m_Queue = HeapAllocateArray<int32_t>(heap, capacity);
queue->m_QueueReadIndex = 0;
queue->m_QueueWriteIndex = 0;
queue->m_QueueCapacity = capacity;
queue->m_Config = *config;
queue->m_PendingNodeCount = 0;
queue->m_FailedNodeCount = 0;
queue->m_QuitSignalled = false;
queue->m_ExpensiveRunning = 0;
queue->m_ExpensiveWaitCount = 0;
queue->m_ExpensiveWaitList = HeapAllocateArray<NodeState*>(heap, capacity);
CHECK(queue->m_Queue);
if (queue->m_Config.m_ThreadCount > kMaxBuildThreads)
{
Log(kWarning, "too many build threads (%d) - clamping to %d",
queue->m_Config.m_ThreadCount, kMaxBuildThreads);
queue->m_Config.m_ThreadCount = kMaxBuildThreads;
}
Log(kDebug, "build queue initialized; ring buffer capacity = %u", queue->m_QueueCapacity);
// Block all signals on the main thread.
SignalBlockThread(true);
SignalHandlerSetCondition(&queue->m_WorkAvailable);
// Create build threads.
for (int i = 0, thread_count = config->m_ThreadCount; i < thread_count; ++i)
{
ThreadState* thread_state = &queue->m_ThreadState[i];
ThreadStateInit(thread_state, queue, MB(64), MB(32), i);
if (i > 0)
{
Log(kDebug, "starting build thread %d", i);
queue->m_Threads[i] = ThreadStart(BuildThreadRoutine, thread_state);
}
}
}