3 files changed, 26 insertions, 15 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c4173c7..630840f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.28)
 set(CMAKE_C_STANDARD 11)
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
-set(CMAKE_BUILD_TYPE Debug)
+# set(CMAKE_BUILD_TYPE Debug)
 
 find_package(SDL3 REQUIRED)
 find_package(cpr REQUIRED)
diff --git a/Museum.cpp b/Museum.cpp
index bf000e2..346acb7 100644
--- a/Museum.cpp
+++ b/Museum.cpp
@@ -29,30 +29,38 @@ void Museum::update() {
 }
 
 void Museum::skip_forward() {
+	lock_guard<mutex> guard(this->jump_mutex);
 	this->jump++;
 }
 void Museum::skip_backward() {
+	lock_guard<mutex> guard(this->jump_mutex);
 	this->paused = true;
 	this->jump--;
 }
 
+void Museum::process_jump() {
+	lock_guard<mutex> guard(this->jump_mutex);
+
+	if (this->jump > 0) {
+		// forward jump
+		for (; this->jump != 0; this->jump--) {
+			for (size_t i = 0; i < this->snapshot_ticks; i++)
+				this->update();
+		}
+	} else if (this->jump < 0) {
+		// backward jump
+		for (; this->jump != 0; this->jump++) {
+			if (this->history.empty()) continue;
+			this->restore_snapshot(this->history.top());
+			if (this->tick > 0) this->history.pop();
+		}
+	}
+}
+
 void Museum::work() {
 	while (this->working) {
 		// immediately process jumps, even if paused
-		if (this->jump > 0) {
-			// forward jump
-			for (; this->jump != 0; this->jump--) {
-				for (size_t i = 0; i < this->snapshot_ticks; i++)
-					this->update();
-			}
-		} else if (this->jump < 0) {
-			// backward jump
-			for (; this->jump != 0; this->jump++) {
-				if (this->history.empty()) continue;
-				this->restore_snapshot(this->history.top());
-				if (this->tick > 0) this->history.pop();
-			}
-		}
+		this->process_jump();
 
 		// wait with regular update if paused
 		if (this->paused) continue;
diff --git a/Museum.h b/Museum.h
index bc5b590..445a8bf 100644
--- a/Museum.h
+++ b/Museum.h
@@ -3,6 +3,7 @@
 #include <thread>
 #include <chrono>
 #include <stack>
+#include <mutex>
 
 #include "People.h"
 #include "Canvas.h"
@@ -30,6 +31,8 @@ public:
 
 private:
 	int jump = 0;
+	std::mutex jump_mutex;
+	void process_jump();
 
 private:
 	bool working = true;