os: rework kernel architecture

Rework the code structure and architecture of the kernel by separating
platform-dependent and platform-independent code more cleanly. As of
this patchset, full feature parity has not been achieved. Nonetheless, a
sufficient subset of functionality has been ported to the new
architecture to demonstrate the feasibility of the new structure.

1 files changed, 24 insertions, 0 deletions

diff --git a/libs/kstd/src/mutex.cpp b/libs/kstd/src/mutex.cpp
new file mode 100644
index 0000000..5a26154
--- /dev/null
+++ b/libs/kstd/src/mutex.cpp
@@ -0,0 +1,24 @@
+#include "kstd/mutex"
+
+#include <atomic>
+
+namespace kstd
+{
+  auto mutex::lock() -> void
+  {
+    while (!try_lock())
+    {
+      asm volatile("nop");
+    }
+  }
+
+  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 kstd