Support threads in the script debugger

* This implementation adds threads on the side of the client (script debugger).
* Some functions of the debugger are optimized.
* The profile is also now thread safe using atomics.
* The editor can switch between multiple threads when debugging.

This PR adds threaded support for the script language debugger. Every thread has its own thread local data and it will connect to the debugger using multiple thread IDs.
This means that, now, the editor can receive multiple threads entering debug mode at the same time.

1 files changed, 16 insertions, 7 deletions

diff --git a/core/debugger/script_debugger.h b/core/debugger/script_debugger.h
index edce089179..ee037b91fa 100644
--- a/core/debugger/script_debugger.h
+++ b/core/debugger/script_debugger.h
@@ -40,21 +40,25 @@
 class ScriptDebugger {
 	typedef ScriptLanguage::StackInfo StackInfo;
 
-	int lines_left = -1;
-	int depth = -1;
 	bool skip_breakpoints = false;
 
 	HashMap<int, HashSet<StringName>> breakpoints;
 
-	ScriptLanguage *break_lang = nullptr;
-	Vector<StackInfo> error_stack_info;
+	static thread_local int lines_left;
+	static thread_local int depth;
+	static thread_local ScriptLanguage *break_lang;
+	static thread_local Vector<StackInfo> error_stack_info;
 
 public:
 	void set_lines_left(int p_left);
-	int get_lines_left() const;
+	_ALWAYS_INLINE_ int get_lines_left() const {
+		return lines_left;
+	}
 
 	void set_depth(int p_depth);
-	int get_depth() const;
+	_ALWAYS_INLINE_ int get_depth() const {
+		return depth;
+	}
 
 	String breakpoint_find_source(const String &p_source) const;
 	void set_break_language(ScriptLanguage *p_lang) { break_lang = p_lang; }
@@ -63,7 +67,12 @@ public:
 	bool is_skipping_breakpoints();
 	void insert_breakpoint(int p_line, const StringName &p_source);
 	void remove_breakpoint(int p_line, const StringName &p_source);
-	bool is_breakpoint(int p_line, const StringName &p_source) const;
+	_ALWAYS_INLINE_ bool is_breakpoint(int p_line, const StringName &p_source) const {
+		if (likely(!breakpoints.has(p_line))) {
+			return false;
+		}
+		return breakpoints[p_line].has(p_source);
+	}
 	void clear_breakpoints();
 	const HashMap<int, HashSet<StringName>> &get_breakpoints() const { return breakpoints; }