fs: use preadv on Linux if available

2014-02-26 04:49:26 -05:00 · 2014-02-26 04:49:26 -05:00 · 269ff0beae
commit 269ff0beae
parent 515be33909
1 changed files with 12 additions and 0 deletions
--- a/src/unix/fs.c
+++ b/src/unix/fs.c
@ -49,6 +49,18 @@
    defined(__OpenBSD__)    ||                                            \
    defined(__NetBSD__)
 # define HAVE_PREADV 1
+#elif defined(__linux__)
+# include <linux/version.h>
+# if defined(__GLIBC_PREREQ)
+#   if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30) &&                    \
+       __GLIBC_PREREQ(2,10)
+#    define HAVE_PREADV 1
+#   else
+#    define HAVE_PREADV 0
+#   endif
+# else
+#  define HAVE_PREADV 0
+# endif
 #else
 # define HAVE_PREADV 0
 #endif