kennel/process: move process list to kernel instance

src/core/hle/kernel/kernel.h

@@ -7,6 +7,7 @@
 #include <atomic>
 #include <memory>
 #include <string>
+#include <vector>
 #include <boost/smart_ptr/intrusive_ptr.hpp>
 #include "common/common_types.h"
 #include "core/hle/result.h"
@@ -180,6 +181,9 @@ public:
 
     u32 GenerateObjectID();
 
+    /// Retrieves a process from the current list of processes.
+    SharedPtr<Process> GetProcessById(u32 process_id) const;
+
 private:
     std::unique_ptr<ResourceLimitList> resource_limits;
     std::atomic<u32> next_object_id{0};
@@ -187,6 +191,9 @@ private:
     // TODO(Subv): Start the process ids from 10 for now, as lower PIDs are
     // reserved for low-level services
     u32 next_process_id = 10;
+
+    // Lists all processes that exist in the current session.
+    std::vector<SharedPtr<Process>> process_list;
 };
 
 } // namespace Kernel