1 files changed, 31 insertions, 0 deletions
diff --git a/src/include/err.h b/src/include/err.h
new file mode 100644
index 000000000..c188e9753
--- /dev/null
+++ b/src/include/err.h
@@ -0,0 +1,31 @@
+#ifndef CEPH_ERR_H
+#define CEPH_ERR_H
+
+/*
+ * adapted from linux 2.6.24 include/linux/err.h
+ */
+#define MAX_ERRNO 4095
+#define IS_ERR_VALUE(x) ((x) >= (uintptr_t)-MAX_ERRNO)
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+/* this generates a warning in c++; caller can do the cast manually
+static inline void *ERR_PTR(long error)
+{
+  return (void *) error;
+}
+*/
+
+static inline intptr_t PTR_ERR(const void *ptr)
+{
+  return (intptr_t) ptr;
+}
+
+static inline bool IS_ERR(const void *ptr)
+{
+  return IS_ERR_VALUE((uintptr_t)ptr);
+}
+
+#endif