X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=para.h;h=5e0501a6d34685a538e0cddbec07c87c2c0785be;hp=0a14b99a51f0096e979983c9954f9617ea669097;hb=a02611146dcc9eb5aac4b05e4602e58f719076ae;hpb=39ec52d7bfec591dcad0d41bcdbdf6d980bf5913

diff --git a/para.h b/para.h
index 0a14b99a..5e0501a6 100644
--- a/para.h
+++ b/para.h
@@ -131,6 +131,18 @@ _static_inline_ long int para_random(unsigned max)
 	return ((max + 0.0) * (random() / (RAND_MAX + 1.0)));
 }
 
+/**
+ * Simple sanity check for I/O vectors.
+ *
+ * \param iov Pointer to the I/O vector to check.
+ *
+ * \return True if \a iov points to a non-empty buffer.
+ */
+_static_inline_ bool iov_valid(const struct iovec *iov)
+{
+	return iov && iov->iov_len > 0 && iov->iov_base;
+}
+
 /** Round up x to next multiple of y. */
 #define ROUND_UP(x, y) ({ \
 	const typeof(y) _divisor = y; \