Merge pull request #313 from trapexit/fadvise

abstract posix_fadvise

src/fs_clonefile.cpp

@@ -25,6 +25,7 @@
 #include <vector>
 
 #include "fs_attr.hpp"
+#include "fs_fadvise.hpp"
 #include "fs_fallocate.hpp"
 #include "fs_sendfile.hpp"
 #include "fs_time.hpp"
@@ -109,8 +110,8 @@ namespace fs
   {
     int rv;
 
-    ::posix_fadvise(fdin,0,count,POSIX_FADV_WILLNEED);
-    ::posix_fadvise(fdin,0,count,POSIX_FADV_SEQUENTIAL);
+    fs::fadvise(fdin,0,count,POSIX_FADV_WILLNEED);
+    fs::fadvise(fdin,0,count,POSIX_FADV_SEQUENTIAL);
 
     fs::fallocate(fdout,0,0,count);
 

src/fs_fadvise.cpp

@@ -0,0 +1,23 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <fcntl.h>
+
+#if _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L
+# include "fs_fadvise_posix.icpp"
+#else
+# include "fs_fadvise_unsupported.icpp"
+#endif

src/fs_fadvise.hpp

@@ -0,0 +1,53 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef __FS_FADVISE_HPP__
+#define __FS_FADVISE_HPP__
+
+#ifndef POSIX_FADV_NORMAL
+# define POSIX_FADV_NORMAL 0
+#endif
+
+#ifndef POSIX_FADV_RANDOM
+# define POSIX_FADV_NORMAL 1
+#endif
+
+#ifndef POSIX_FADV_SEQUENTIAL
+# define POSIX_FADV_SEQUENTIAL 2
+#endif
+
+#ifndef POSIX_FADV_WILLNEED
+# define POSIX_FADV_WILLNEED 3
+#endif
+
+#ifndef POSIX_FADV_DONTNEED
+# define POSIX_FADV_DONTNEED 4
+#endif
+
+#ifndef POSIX_FADV_NOREUSE
+# define POSIX_FADV_NOREUSE 5
+#endif
+
+namespace fs
+{
+  int
+  fadvise(const int   fd,
+          const off_t offset,
+          const off_t len,
+          const int   advice);
+}
+
+#endif // __FS_FADVISE_HPP__

src/fs_fadvise_posix.icpp

@@ -0,0 +1,29 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <errno.h>
+
+namespace fs
+{
+  int
+  fadvise(const int   fd,
+          const off_t offset,
+          const off_t len,
+          const int   advice)
+  {
+    return ::posix_fadvise(fd,offset,len,advice);
+  }
+}

src/fs_fadvise_unsupported.icpp

@@ -0,0 +1,29 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <errno.h>
+
+namespace fs
+{
+  int
+  fadvise(const int   fd,
+          const off_t offset,
+          const off_t len,
+          const int   advice)
+  {
+    return (errno=EOPNOTSUPP,-1);
+  }
+}