Add file:advise/4 - a wrapper to the POSIX syscall posix_fadvise

Useful for informing the Operating System about the access pattern
for a file's data, so that it can adapt the caching strategy to
maximize disk IO performance.

1 files changed, 9 insertions, 0 deletions

diff --git a/erts/emulator/drivers/win32/win_efile.c b/erts/emulator/drivers/win32/win_efile.c
index cdf3bb424c..06850b4945 100644
--- a/erts/emulator/drivers/win32/win_efile.c
+++ b/erts/emulator/drivers/win32/win_efile.c
@@ -1433,3 +1433,12 @@ efile_symlink(Efile_error* errInfo, char* old, char* new)
     errno = ENOTSUP;
     return check_error(-1, errInfo);
 }
+
+int
+efile_fadvise(Efile_error* errInfo, int fd, Sint64 offset,
+	    Sint64 length, int advise)
+{
+    /* posix_fadvise is not available on Windows, do nothing */
+    errno = ERROR_SUCCESS;
+    return check_error(0, errInfo);
+}