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changeset 563:c6036e0a511a

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Work around the non-universality of fdatasync() POSIX, which specifies fdatasync(), also apparently specifies that POSIX_SYNCHRONIZED_IO is defined to a non-zero value if fdatasync() is available -- or at least that's what the man page suggests on Linux. This is probably good enough for us, anyway.
author mas01cr
date Thu, 18 Jun 2009 11:01:31 +0000
parents dfeb5ef768da
children 048688d47697
files audioDB-internals.h
diffstat 1 files changed, 7 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/audioDB-internals.h	Fri Apr 17 16:52:15 2009 +0000
+++ b/audioDB-internals.h	Thu Jun 18 11:01:31 2009 +0000
@@ -1,3 +1,6 @@
+#include <sys/types.h>
+#include <unistd.h>
+
 #include <set>
 #include <queue>
 #include <map>
@@ -179,8 +182,11 @@
     goto error;
   }
 
-  /* can be fsync() if fdatasync() is racily exciting and new */
+#if defined(_POSIX_SYNCHRONIZED_IO) && (_POSIX_SYNCHRONIZED_IO > 0)
   fdatasync(adb->fd);
+#else
+  fsync(adb->fd);
+#endif
   if(lseek(adb->fd, pos, SEEK_SET) == (off_t) -1) {
     goto error;
   }