Add windows support (#707)

Co-authored-by: acalcutt <acalcutt@techidiots.net>
Co-authored-by: Bart Louwers <bart.louwers@gmail.com>
Co-authored-by: Ovidiu Voda <ovi.voda@gmail.com>

platform/windows/src/thread.cpp

@@ -0,0 +1,91 @@
+#pragma once
+
+#include <mbgl/util/platform.hpp>
+#include <mbgl/platform/thread.hpp>
+#include <mbgl/util/logging.hpp>
+
+#include <string>
+
+#include "thread.h"
+
+DWORD selfThreadKey;
+DummyClassThread dummyClassThread;
+
+// https://learn.microsoft.com/en-us/visualstudio/debugger/how-to-set-a-thread-name-in-native-code?view=vs-2022
+void SetThreadName(DWORD dwThreadID, const char* threadName) {
+    THREADNAME_INFO info;
+    info.dwType = 0x1000;
+    info.szName = threadName;
+    info.dwThreadID = dwThreadID;
+    info.dwFlags = 0;
+#pragma warning(push)
+
+#pragma warning(disable: 6320 6322)
+    __try {
+        RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR*)&info);
+    }
+    __except (EXCEPTION_EXECUTE_HANDLER){
+    }
+#pragma warning(pop)
+}
+
+THREAD_INFO* GetCurrentThreadInfo() {
+    THREAD_INFO* info = (THREAD_INFO*)TlsGetValue(selfThreadKey);
+
+    if (!info) {
+        info = (THREAD_INFO*)calloc(1, sizeof(THREAD_INFO));
+        info->id = GetCurrentThreadId();
+        info->key = selfThreadKey;
+        info->name = NULL;
+
+        TlsSetValue(selfThreadKey, info);
+    }
+
+    return info;
+}
+
+namespace mbgl {
+namespace platform {
+
+std::string getCurrentThreadName() {
+    THREAD_INFO* info = GetCurrentThreadInfo();
+
+    if (info && info->name)
+    {
+        return std::string(info->name);
+    }
+    
+    return std::string();
+}
+
+void setCurrentThreadName(const std::string& name) {
+    THREAD_INFO* info = GetCurrentThreadInfo();
+
+    if (info && info->name)
+    {
+        free(info->name);
+        info->name = new char[name.length() + 1];
+        std::strcpy(info->name, name.c_str());
+    }
+    
+    SetThreadName(-1, name.c_str());
+}
+
+void makeThreadLowPriority() {
+    if (!SetThreadPriority(GetCurrentThread(), THREAD_MODE_BACKGROUND_BEGIN)) {
+        Log::Warning(Event::General, "Couldn't set thread scheduling policy");
+    }
+}
+
+void setCurrentThreadPriority(double priority) {
+    if (!SetThreadPriority(GetCurrentThread(), int(priority))) {
+        Log::Warning(Event::General, "Couldn't set thread priority");
+    }
+}
+
+void attachThread() {}
+
+void detachThread() {}
+
+} // namespace platform
+} // namespace mbgl