Changeset 6afc9d7 in mainline for uspace/lib/posix/source/internal/common.h

Timestamp:

2015-10-06T19:01:36Z (9 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

0328987

Parents:

f1f7584

Message:

UNIX-like I/O functions should use errno to return error code for many reasons.

File:

• uspace/lib/posix/source/internal/common.h (modified) (2 diffs)

uspace/lib/posix/source/internal/common.h

@@ -48 +48 @@
         } while (0)
 
-/* A little helper macro to avoid typing this over and over. */
+/* Convert negative error return value to positive errno */
 #define errnify(func, ...) ({ \
         int rc = func(__VA_ARGS__); \
@@ -58 +58 @@
 })
 
+/* Convert negative errno to positive errno */
+#define negerrno(func, ...) ({ \
+        int rc = func(__VA_ARGS__); \
+        if (rc < 0) { \
+                errno = -errno; \
+        } \
+        rc; \
+})
+
 #endif /* LIBPOSIX_COMMON_H_ */