Rework thread TIB handling & DLL initialization handling

test/thread_notifications.c

@@ -0,0 +1,45 @@
+#include <windows.h>
+
+static HMODULE g_module = NULL;
+static volatile LONG g_threadAttachCount = 0;
+static volatile LONG g_threadDetachCount = 0;
+
+BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved) {
+    (void)lpReserved;
+    switch (fdwReason) {
+    case DLL_PROCESS_ATTACH:
+        g_module = hinstDLL;
+        g_threadAttachCount = 0;
+        g_threadDetachCount = 0;
+        break;
+    case DLL_THREAD_ATTACH:
+        InterlockedIncrement(&g_threadAttachCount);
+        break;
+    case DLL_THREAD_DETACH:
+        InterlockedIncrement(&g_threadDetachCount);
+        break;
+    case DLL_PROCESS_DETACH:
+        g_module = NULL;
+        break;
+    default:
+        break;
+    }
+    return TRUE;
+}
+
+__declspec(dllexport) LONG get_thread_attach_count(void) {
+    return g_threadAttachCount;
+}
+
+__declspec(dllexport) LONG get_thread_detach_count(void) {
+    return g_threadDetachCount;
+}
+
+__declspec(dllexport) void reset_thread_counts(void) {
+    g_threadAttachCount = 0;
+    g_threadDetachCount = 0;
+}
+
+__declspec(dllexport) BOOL disable_thread_notifications(void) {
+    return DisableThreadLibraryCalls(g_module);
+}