Windows: Call SetThreadStackGuarantee for all threads, not just main thread

src/openttd.cpp

@@ -685,6 +685,7 @@ static const OptionData _options[] = {
 int openttd_main(int argc, char *argv[])
 {
 	SetSelfAsMainThread();
+	PerThreadSetup();
 	std::string musicdriver;
 	std::string sounddriver;
 	std::string videodriver;

src/os/os2/os2.cpp

@@ -219,6 +219,8 @@ void SetCurrentThreadName(const char *)
 int GetCurrentThreadName(char *str, const char *last) { return 0; }
 
 void SetSelfAsMainThread() { }
+void PerThreadSetup() { }
+void PerThreadSetupInit() { }
 
 bool IsMainThread() { return false; }
 bool IsNonMainThread() { return false; }

src/os/unix/unix.cpp

@@ -256,6 +256,7 @@ int CDECL main(int argc, char *argv[])
 		argc = 1;
 	}
 #endif
+	PerThreadSetupInit();
 	CrashLog::InitialiseCrashLog();
 
 	SetRandomSeed(time(nullptr));
@@ -348,6 +349,10 @@ void SetSelfAsMainThread()
 #endif
 }
 
+void PerThreadSetup() { }
+
+void PerThreadSetupInit() { }
+
 bool IsMainThread()
 {
 #if !defined(NO_THREADS)

src/os/windows/crashlog_win.cpp

@@ -725,12 +725,6 @@ static void CDECL CustomAbort(int signal)
 	if (LoadLibraryList((Function*)&AddVectoredExceptionHandler, "kernel32.dll\0AddVectoredExceptionHandler\0\0")) {
 		AddVectoredExceptionHandler(1, VectoredExceptionHandler);
 	}
-
-	BOOL (WINAPI *SetThreadStackGuarantee)(PULONG);
-	if (LoadLibraryList((Function*)&SetThreadStackGuarantee, "kernel32.dll\0SetThreadStackGuarantee\0\0")) {
-		ULONG stacksize = 65536;
-		SetThreadStackGuarantee(&stacksize);
-	}
 }
 
 /* static */ void CrashLog::DesyncCrashLog(const std::string *log_in, std::string *log_out, const DesyncExtraInfo &info)

src/os/windows/win32.cpp

@@ -436,6 +436,7 @@ int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLi
 	/* Set system timer resolution to 1ms. */
 	timeBeginPeriod(1);
 
+	PerThreadSetupInit();
 	CrashLog::InitialiseCrashLog();
 
 	/* Convert the command line to UTF-8. We need a dedicated buffer
@@ -739,6 +740,21 @@ void SetSelfAsMainThread()
 	main_thread_id = GetCurrentThreadId();
 }
 
+static BOOL (WINAPI *_SetThreadStackGuarantee)(PULONG) = nullptr;
+
+void PerThreadSetup()
+{
+	if (_SetThreadStackGuarantee != nullptr) {
+		ULONG stacksize = 65536;
+		_SetThreadStackGuarantee(&stacksize);
+	}
+}
+
+void PerThreadSetupInit()
+{
+	LoadLibraryList((Function*)&_SetThreadStackGuarantee, "kernel32.dll\0SetThreadStackGuarantee\0\0");
+}
+
 bool IsMainThread()
 {
 	return main_thread_id == GetCurrentThreadId();

src/thread.h

@@ -49,6 +49,16 @@ int GetCurrentThreadName(char *str, const char *last);
  */
 void SetSelfAsMainThread();
 
+/**
+ * Perform per-thread setup
+ */
+void PerThreadSetup();
+
+/**
+ * Setup thread functionality required for later calls to PerThreadSetup
+ */
+void PerThreadSetupInit();
+
 /**
  * @return true if the current thread definitely the "main" thread. If in doubt returns false.
  */
@@ -77,6 +87,7 @@ inline bool StartNewThread(std::thread *thr, const char *name, TFn&& _Fx, TArgs&
 	try {
 		std::thread t([] (const char *name, TFn&& F, TArgs&&... A) {
 				SetCurrentThreadName(name);
+				PerThreadSetup();
 				try {
 					/* Call user function with the given arguments. */
 					F(A...);