add reader writer header, fix cmakelists

CMakeLists.txt

@@ -6,14 +6,16 @@ set(CMAKE_CXX_STANDARD 23)
 add_executable(
         os-labs
         main.cpp
-        src/signal_handler.cpp
         include/signal_handler.h
+        src/signal_handler.cpp
         include/buffer.h
         src/buffer.cpp
         include/producer.h
         src/consumer.cpp
         include/consumer.h
         src/producer.cpp
+        include/reader_writer.h
+        src/reader_writer.cpp
 )
 target_link_libraries(os-labs PRIVATE m)
 target_include_directories(os-labs PRIVATE ${PROJECT_SOURCE_DIR}/include)

include/reader_writer.h

@@ -0,0 +1,29 @@
+//
+// Created by lumijiez on 12/8/24.
+//
+
+#ifndef READER_WRITER_H
+#define READER_WRITER_H
+
+#include <semaphore.h>
+#include <fstream>
+
+class ReaderWriter {
+public:
+    ReaderWriter(int numReaders, int numWriters, const std::string& filename);
+    ~ReaderWriter();
+    void run();
+
+private:
+    int numReaders;
+    int numWriters;
+    std::string filename;
+
+    sem_t resourceAccess;
+    sem_t readCountAccess;
+    int readCount;
+
+    static void* reader(void* arg);
+    static void* writer(void* arg);
+};
+#endif //READER_WRITER_H

src/reader_writer.cpp

@@ -0,0 +1,5 @@
+//
+// Created by lumijiez on 12/8/24.
+//
+
+#include "reader_writer.h"