[PATCH:drm 3/4] Add NetBSD atomic ops support.

[Thomas Klausner]

Signed-off-by: Thomas Klausner <wiz at NetBSD.org>
---
 xf86atomic.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/xf86atomic.h b/xf86atomic.h
index db2f619..d0f85fc 100644
--- a/xf86atomic.h
+++ b/xf86atomic.h
@@ -92,6 +92,23 @@ typedef struct { uint_t atomic; } atomic_t;
 
 #endif
 
+#if defined(__NetBSD__) && !defined(HAS_ATOMIC_OPS)  /* NetBSD */
+
+#include <sys/atomic.h>
+#define HAS_ATOMIC_OPS 1
+
+typedef struct { int atomic; } atomic_t;
+
+# define atomic_read(x) (int) ((x)->atomic)
+# define atomic_set(x, val) ((x)->atomic = (val))
+# define atomic_inc(x) (atomic_inc_uint (&(x)->atomic))
+# define atomic_dec_and_test(x) (atomic_dec_uint_nv(&(x)->atomic) == 0)
+# define atomic_add(x, v) (atomic_add_int(&(x)->atomic, (v)))
+# define atomic_dec(x, v) (atomic_add_int(&(x)->atomic, -(v)))
+# define atomic_cmpxchg(x, oldv, newv) atomic_cas_uint (&(x)->atomic, oldv, newv)
+
+#endif
+
 #if ! HAS_ATOMIC_OPS
 #error libdrm requires atomic operations, please define them for your CPU/compiler.
 #endif
-- 
1.9.4