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Start creating multithreading work queue

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This commit is contained in:
Doyle Thai 2017-06-17 22:25:29 +10:00
parent 64fb913239
commit 5a6564fa94
2 changed files with 110 additions and 17 deletions
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120
src/Win32DTRenderer.cpp
View File

@ -441,22 +441,65 @@ i32 Win32GetModuleDirectory(char *const buf, const u32 bufLen)
return lastSlashIndex;
}
typedef struct Win32Thread
{
HANDLE handle;
i32 logicalIndex;
DWORD id;
} Win32Thread;
typedef struct Win32ThreadContext
{
Win32Thread *threadList;
i32 size;
} Win32ThreadContext;
typedef struct ThreadJob
{
int numberToPrint;
i32 numberToPrint;
} ThreadJob;
typedef struct ThreadJobQueue {
ThreadJob *queue;
int queueSize;
} ThreadJobQueue;
typedef struct Win32ThreadJobQueue {
ThreadJob *jobList;
FILE_SCOPE ThreadJobQueue jobQueue[16];
LONG volatile jobInsertIndex;
LONG volatile currJobIndex;
LONG size;
} Win32ThreadJobQueue;
FILE_SCOPE Win32ThreadJobQueue globalJobQueue;
FILE_SCOPE Win32ThreadContext globalThreadContext;
FILE_SCOPE HANDLE globalSemaphore;
void PushThreadJob(Win32ThreadJobQueue *queue, ThreadJob job)
{
DQN_ASSERT(queue->jobInsertIndex < queue->size);
queue->jobList[queue->jobInsertIndex] = job;
queue->jobInsertIndex++;
ReleaseSemaphore(globalSemaphore, 1, NULL);
}
DWORD WINAPI Win32ThreadCallback(void *lpParameter)
{
OutputDebugString("Threaded Hello World!\n");
return 0;
Win32Thread *thread = (Win32Thread *)lpParameter;
DQN_ASSERT(thread);
for (;;)
{
if (globalJobQueue.currJobIndex < globalJobQueue.jobInsertIndex)
{
LONG workIndex = InterlockedIncrement(&globalJobQueue.currJobIndex) - 1;
ThreadJob job = globalJobQueue.jobList[workIndex];
DqnWin32_OutputDebugString("Thread %d: Printing number: %d\n", thread->logicalIndex,
job.numberToPrint);
}
else
{
WaitForSingleObjectEx(globalSemaphore, INFINITE, false);
}
}
}
int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nShowCmd)
@ -593,7 +636,7 @@ int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLi
////////////////////////////////////////////////////////////////////////
// Query CPU Cores
////////////////////////////////////////////////////////////////////////
i32 numCores = 1;
i32 numCores = 0;
i32 numLogicalCores = 0;
SYSTEM_INFO systemInfo;
@ -648,18 +691,67 @@ int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLi
{
DQN_WIN32_ERROR_BOX("DqnMemStack_Push() failed", NULL);
}
DqnMemStackTempRegion_End(memRegion);
////////////////////////////////////////////////////////////////////////
// Threading
////////////////////////////////////////////////////////////////////////
const i32 QUEUE_SIZE = 20;
globalJobQueue.jobList = (ThreadJob *)DqnMemStack_Push(&globalPlatformMemory.tempStack,
sizeof(ThreadJob) * QUEUE_SIZE);
if (globalJobQueue.jobList)
{
// NOTE: (numCores - 1), 1 core is already exclusively for main thread
i32 availableThreads = (numCores - 1) * numLogicalCores;
// TODO(doyle): Logic for single core/thread processors
DQN_ASSERT(availableThreads > 0);
globalSemaphore = CreateSemaphore(NULL, 0, availableThreads, NULL);
if (globalSemaphore)
{
// Create jobs
globalJobQueue.size = QUEUE_SIZE;
for (i32 i = 0; i < 10; i++)
{
ThreadJob job = {};
job.numberToPrint = i;
PushThreadJob(&globalJobQueue, job);
}
// Create threads
globalThreadContext.threadList = (Win32Thread *)DqnMemStack_Push(
&globalPlatformMemory.tempStack, sizeof(Win32Thread) * availableThreads);
if (globalThreadContext.threadList)
{
globalThreadContext.size = availableThreads;
for (i32 i = 0; i < globalThreadContext.size; i++)
{
const i32 USE_DEFAULT_STACK_SIZE = 0;
void *threadParam = NULL;
DWORD threadId;
Win32Thread *thread = &globalThreadContext.threadList[i];
thread->logicalIndex = i;
thread->handle =
CreateThread(NULL, USE_DEFAULT_STACK_SIZE, Win32ThreadCallback,
(void *)thread, 0, &thread->id);
HANDLE threadHandle = CreateThread(NULL, USE_DEFAULT_STACK_SIZE, Win32ThreadCallback,
threadParam, 0, &threadId);
if (!thread->handle)
{
DqnWin32_DisplayLastError("CreateThread() failed");
}
}
}
else
{
// TODO(doyle): Failed allocation
}
DqnMemStackTempRegion_End(memRegion);
}
else
{
// TODO(doyle): Semaphore failed.
DqnWin32_DisplayLastError("CreateSemaphore() failed");
}
}
}
////////////////////////////////////////////////////////////////////////////

5
src/dqn.h
View File

@ -1686,9 +1686,10 @@ DQN_FILE_SCOPE void DqnMemStackTempRegion_End(DqnMemStackTempRegion region)
{
DQN_ASSERT(stack->block->used >= region.used);
stack->block->used = region.used;
DQN_ASSERT(stack->tempRegionCount >= 0);
}
stack->tempRegionCount--;
DQN_ASSERT(stack->tempRegionCount >= 0);
}
#ifdef DQN_CPP_MODE
@ -3321,7 +3322,7 @@ DQN_FILE_SCOPE void DqnWin32_DisplayErrorCode(const DWORD error, const char *con
DQN_FILE_SCOPE void DqnWin32_OutputDebugString(const char *const formatStr, ...)
{
LOCAL_PERSIST char str[1024] = {0};
char str[1024] = {0};
va_list argList;
va_start(argList, formatStr);