}
static inline void _reset_errno_(int *saved_errno) {
+ if (*saved_errno < 0) /* Invalidated by UNPROTECT_ERRNO? */
+ return;
+
errno = *saved_errno;
}
#define PROTECT_ERRNO \
_cleanup_(_reset_errno_) _unused_ int _saved_errno_ = errno
+#define UNPROTECT_ERRNO \
+ do { \
+ errno = _saved_errno_; \
+ _saved_errno_ = -1; \
+ } while (false)
+
static inline int negative_errno(void) {
/* This helper should be used to shut up gcc if you know 'errno' is
* negative. Instead of "return -errno;", use "return negative_errno();"