core: Make System's default constructor private

This makes it a compilation error to construct additional instances of
the System class directly, preventing accidental wasteful constructions
over and over.

2 files changed, 4 insertions, 0 deletions

diff --git a/src/core/core.cpp b/src/core/core.cpp
index 7936c5b56..ae3849a36 100644
--- a/src/core/core.cpp
+++ b/src/core/core.cpp
@@ -25,6 +25,8 @@ namespace Core {
 
 /*static*/ System System::s_instance;
 
+System::System() = default;
+
 System::~System() = default;
 
 /// Runs a CPU core while the system is powered on
diff --git a/src/core/core.h b/src/core/core.h
index f90f085ad..c6f69f001 100644
--- a/src/core/core.h
+++ b/src/core/core.h
@@ -168,6 +168,8 @@ public:
     }
 
 private:
+    System();
+
     /// Returns the currently running CPU core
     Cpu& CurrentCpuCore();