--- IO-AIO/AIO.xs	2012/12/29 09:35:39	1.225
+++ IO-AIO/AIO.xs	2014/04/11 05:19:40	1.229
@@ -21,7 +21,11 @@
 # include <sys/mman.h>
 #endif
 
-#if __linux__
+/* the incompetent fool that created musl keeps __linux__, refuses
+ * to implement any linux standard apis, and also has no way to test
+ * for his broken iplementation. on't complain if this fails for you.
+ */
+#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
 # include <linux/fs.h>
 # ifdef FS_IOC_FIEMAP
 #  include <linux/types.h>
@@ -200,7 +204,7 @@
     goto done;
 
   /* else we have to loop -
-   * it would be tempting (atcually I tried that first) to just query the
+   * it would be tempting (actually I tried that first) to just query the
    * number of extents needed, but linux often feels like not returning all
    * extents, without telling us it left any out. this complicates
    * this quite a bit.
@@ -223,6 +227,9 @@
       if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
         return;
 
+      if (!incmap->fm_mapped_extents)
+        goto done;
+
       count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
       fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
       errno = ENOMEM;
@@ -1615,7 +1622,10 @@
 
         req->type = EIO_GROUP;
 
+        PUTBACK;
         req_submit (req);
+        SPAGAIN;
+
         XPUSHs (req_sv (req, aio_grp_stash));
 }
 
@@ -1869,6 +1879,22 @@
 	OUTPUT:
         RETVAL
 
+int
+pipesize (aio_rfd rfh, int new_size = -1)
+	PROTOTYPE: $;$
+        CODE:
+#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
+        if (new_size >= 0)
+          RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
+        else
+          RETVAL = fcntl (rfh, F_GETPIPE_SZ);
+#else
+        errno = ENOSYS;
+        RETVAL = -1;
+#endif
+        OUTPUT:
+        RETVAL
+
 void _on_next_submit (SV *cb)
 	CODE:
         SvREFCNT_dec (on_next_submit);