From 060e439b9c99f4fd89060acd44913b103d983b45 Mon Sep 17 00:00:00 2001
From: Brian Norris <banorris@uci.edu>
Date: Fri, 9 Mar 2012 19:00:50 -0800
Subject: [PATCH] libatomic: add stub atomic lib header/source

Stub implementations, for testing.

(Temporary: need to find a better generic atomic_int, atomic_long, etc.
implementation)
---
 Makefile    |  4 ++--
 libatomic.c | 13 +++++++++++++
 libatomic.h | 22 ++++++++++++++++++++++
 3 files changed, 37 insertions(+), 2 deletions(-)
 create mode 100644 libatomic.c
 create mode 100644 libatomic.h

diff --git a/Makefile b/Makefile
index 139e954..073121e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 CC=gcc
 BIN=libthreads
-SOURCE=libthreads.c schedule.c
-HEADERS=libthreads.h schedule.h common.h
+SOURCE=libthreads.c schedule.c libatomic.c
+HEADERS=libthreads.h schedule.h common.h libatomic.h
 FLAGS=-Wall
 
 all: ${BIN}
diff --git a/libatomic.c b/libatomic.c
new file mode 100644
index 0000000..a00838e
--- /dev/null
+++ b/libatomic.c
@@ -0,0 +1,13 @@
+#include "libatomic.h"
+#include "libthreads.h"
+
+void atomic_store_explicit(struct atomic_object *obj, int value, memory_order order)
+{
+	thread_yield();
+}
+
+int atomic_load_explicit(struct atomic_object *obj, memory_order order)
+{
+	thread_yield();
+	return 0;
+}
diff --git a/libatomic.h b/libatomic.h
new file mode 100644
index 0000000..f861445
--- /dev/null
+++ b/libatomic.h
@@ -0,0 +1,22 @@
+#ifndef __LIBATOMIC_H__
+#define __LIBATOMIC_H__
+
+typedef enum memory_order {
+	memory_order_relaxed,
+	memory_order_consume,
+	memory_order_acquire,
+	memory_order_release,
+	memory_order_acq_rel,
+	memory_order_seq_cst
+} memory_order;
+
+typedef struct atomic_object {
+} atomic_int;
+
+void atomic_store_explicit(struct atomic_object *obj, int value, memory_order order);
+#define atomic_store(A, B) atomic_store_explicit((A), (B), memory_order_seq_cst)
+
+int atomic_load_explicit(struct atomic_object *obj, memory_order order);
+#define atomic_load(A) atomic_load_explicit((A), memory_order_seq_cst)
+
+#endif /* __LIBATOMIC_H__ */
-- 
2.34.1