Crashlog: Update thread/lock handling to match GameLoop changes

src/os/os2/os2.cpp

@@ -219,8 +219,10 @@ void SetCurrentThreadName(const char *)
 int GetCurrentThreadName(char *str, const char *last) { return 0; }
 
 void SetSelfAsMainThread() { }
+void SetSelfAsGameThread() { }
 void PerThreadSetup() { }
 void PerThreadSetupInit() { }
 
 bool IsMainThread() { return false; }
 bool IsNonMainThread() { return false; }
+bool IsGameThread() { return false; }

src/os/unix/unix.cpp

@@ -341,6 +341,7 @@ int GetCurrentThreadName(char *str, const char *last)
 }
 
 static pthread_t main_thread;
+static pthread_t game_thread;
 
 void SetSelfAsMainThread()
 {
@@ -349,6 +350,13 @@ void SetSelfAsMainThread()
 #endif
 }
 
+void SetSelfAsGameThread()
+{
+#if !defined(NO_THREADS)
+	game_thread = pthread_self();
+#endif
+}
+
 void PerThreadSetup() { }
 
 void PerThreadSetupInit() { }
@@ -370,3 +378,12 @@ bool IsNonMainThread()
 	return false;
 #endif
 }
+
+bool IsGameThread()
+{
+#if !defined(NO_THREADS)
+	return game_thread == pthread_self();
+#else
+	return false;
+#endif
+}

src/os/windows/crashlog_win.cpp

@@ -639,6 +639,8 @@ static LONG WINAPI ExceptionHandler(EXCEPTION_POINTERS *ep)
 		ExitProcess(3);
 	}
 
+	VideoDriver::EmergencyAcquireGameLock(1000, 5);
+
 	CrashLogWindows *log = new CrashLogWindows(ep);
 	CrashLogWindows::current = log;
 	char *buf = log->FillCrashLog(log->crashlog, lastof(log->crashlog));

src/os/windows/win32.cpp

@@ -734,12 +734,18 @@ int OTTDStringCompare(const char *s1, const char *s2)
 }
 
 static DWORD main_thread_id;
+static DWORD game_thread_id;
 
 void SetSelfAsMainThread()
 {
 	main_thread_id = GetCurrentThreadId();
 }
 
+void SetSelfAsGameThread()
+{
+	game_thread_id = GetCurrentThreadId();
+}
+
 static BOOL (WINAPI *_SetThreadStackGuarantee)(PULONG) = nullptr;
 
 void PerThreadSetup()
@@ -765,6 +771,11 @@ bool IsNonMainThread()
 	return main_thread_id != GetCurrentThreadId();
 }
 
+bool IsGameThread()
+{
+	return game_thread_id == GetCurrentThreadId();
+}
+
 static std::map<DWORD, std::string> _thread_name_map;
 static std::mutex _thread_name_map_mutex;