2 files changed, 61 insertions, 0 deletions
diff --git a/asl/synchronization/BUILD.bazel b/asl/synchronization/BUILD.bazel
new file mode 100644
index 0000000..29e0a62
--- /dev/null
+++ b/asl/synchronization/BUILD.bazel
@@ -0,0 +1,10 @@
+cc_library(
+    name = "atomic",
+    hdrs = [
+        "atomic.hpp",
+    ],
+    deps = [
+        "//asl/base",
+    ],
+    visibility = ["//visibility:public"],
+)
diff --git a/asl/synchronization/atomic.hpp b/asl/synchronization/atomic.hpp
new file mode 100644
index 0000000..528a6fa
--- /dev/null
+++ b/asl/synchronization/atomic.hpp
@@ -0,0 +1,51 @@
+#pragma once
+
+#include "asl/base/meta.hpp"
+
+namespace asl
+{
+
+enum class memory_order : int // NOLINT(*-enum-size)
+{
+    relaxed        = __ATOMIC_RELAXED,
+    acquire        = __ATOMIC_ACQUIRE,
+    release        = __ATOMIC_RELEASE,
+    acq_rel        = __ATOMIC_ACQ_REL,
+    seq_cst        = __ATOMIC_SEQ_CST,
+};
+
+template<typename T> struct atomic { T m_value{}; };
+
+inline void atomic_fence(memory_order order)
+{
+    __atomic_thread_fence(static_cast<int>(order));
+}
+
+template<is_integer T>
+inline void atomic_store(atomic<T>* a, T value, memory_order order = memory_order::relaxed)
+{
+    __atomic_store(&a->m_value, &value, static_cast<int>(order));
+}
+
+template<is_integer T>
+inline T atomic_load(atomic<T>* a, memory_order order = memory_order::relaxed)
+{
+    T value;
+    __atomic_load(&a->m_value, &value, static_cast<int>(order));
+    return value;
+}
+
+template<typename T>
+inline T atomic_fetch_increment(atomic<T>* a, memory_order order = memory_order::relaxed)
+{
+    return __atomic_fetch_add(&a->m_value, 1, static_cast<int>(order));
+}
+
+template<typename T>
+inline T atomic_fetch_decrement(atomic<T>* a, memory_order order = memory_order::relaxed)
+{
+    return __atomic_fetch_sub(&a->m_value, 1, static_cast<int>(order));
+}
+
+} // namespace asl
+