Fix size of segment descriptor using bit fields and struct packing

1 files changed, 16 insertions, 0 deletions

diff --git a/arch/x86_64/src/stl/mutex.cpp b/arch/x86_64/src/stl/mutex.cpp
new file mode 100644
index 0000000..232a11c
--- /dev/null
+++ b/arch/x86_64/src/stl/mutex.cpp
@@ -0,0 +1,16 @@
+#include "arch/stl/mutex.hpp"
+
+namespace teachos::arch::stl
+{
+  auto mutex::lock() -> void
+  {
+    while (!try_lock())
+    {
+      // Nothing to do
+    }
+  }
+
+  auto mutex::try_lock() -> bool { return !locked.exchange(true, std::memory_order_acquire); }
+
+  auto mutex::unlock() -> void { locked.store(false, std::memory_order_release); }
+}  // namespace teachos::arch::stl