Squash commits for public release

libs/libc/include/stdatomic.h

@@ -0,0 +1,41 @@
+#ifndef _LIBC_STDATOMIC_H
+#define _LIBC_STDATOMIC_H
+
+#include <stdbool.h>
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+typedef enum {
+    memory_order_relaxed = __ATOMIC_RELAXED,
+    memory_order_consume = __ATOMIC_CONSUME,
+    memory_order_acquire = __ATOMIC_ACQUIRE,
+    memory_order_release = __ATOMIC_RELEASE,
+    memory_order_acq_rel = __ATOMIC_ACQ_REL,
+    memory_order_seq_cst = __ATOMIC_SEQ_CST
+} memory_order;
+
+typedef _Atomic bool atomic_bool;
+typedef _Atomic char atomic_char;
+typedef _Atomic signed char atomic_schar;
+typedef _Atomic unsigned char atomic_uchar;
+typedef _Atomic short atomic_short;
+typedef _Atomic unsigned short atomic_ushort;
+typedef _Atomic int atomic_int;
+typedef _Atomic unsigned int atomic_uint;
+typedef _Atomic long atomic_long;
+typedef _Atomic unsigned long atomic_ulong;
+typedef _Atomic long long atomic_llong;
+typedef _Atomic unsigned long long atomic_ullong;
+
+#define atomic_add_explicit(x, val, ord) (__atomic_add_fetch(x, val, ord))
+#define atomic_store_explicit(x, val, ord) (__atomic_store_n(x, val, ord))
+#define atomic_load_explicit(x, ord) (__atomic_load_n(x, ord))
+
+#define atomic_add(x, val) (atomic_add_explicit(x, val, __ATOMIC_SEQ_CST))
+#define atomic_store(x, val) (atomic_store_explicit(x, val, __ATOMIC_SEQ_CST))
+#define atomic_load(x) (atomic_load_explicit(x, __ATOMIC_SEQ_CST))
+
+__END_DECLS
+
+#endif //_LIBC_STDATOMIC_H