Import sources from 2011-03-30 iso image

1 files changed, 25 insertions, 0 deletions

diff --git a/sys/src/libthread/xincport.h b/sys/src/libthread/xincport.h
new file mode 100755
index 000000000..d5d8fe323
--- /dev/null
+++ b/sys/src/libthread/xincport.h
@@ -0,0 +1,25 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+
+static Lock l;
+
+void
+_xinc(long *p)
+{
+
+	lock(&l);
+	(*p)++;
+	unlock(&l);
+}
+
+long
+_xdec(long *p)
+{
+	long r;
+
+	lock(&l);
+	r = --(*p);
+	unlock(&l);
+	return r;
+}