libc and ape support for amd64

1 files changed, 26 insertions, 0 deletions

diff --git a/sys/src/ape/lib/ap/amd64/lock.c b/sys/src/ape/lib/ap/amd64/lock.c
new file mode 100644
index 000000000..91c0ba233
--- /dev/null
+++ b/sys/src/ape/lib/ap/amd64/lock.c
@@ -0,0 +1,26 @@
+#define _LOCK_EXTENSION
+#include "../plan9/sys9.h"
+#include <lock.h>
+
+int	tas(int*);
+
+void
+lock(Lock *lk)
+{
+	while(tas(&lk->val))
+		_SLEEP(0);
+}
+
+int
+canlock(Lock *lk)
+{
+	if(tas(&lk->val))
+		return 0;
+	return 1;
+}
+
+void
+unlock(Lock *lk)
+{
+	lk->val = 0;
+}