aio: change to use unix io, not stdio

This changes especially makes buffered I/O work
with non-blocking channels.

- separate read and write buffering
- support for timeout on blocking read
- read/write on same channel in event loop with buffering
- read buffer is the same across read, gets, copyto
- autoflush non-blocking writes via event loop
- copyto can now copy to any filehandle-like command
- add some copyto tests

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 3 insertions, 0 deletions

diff --git a/jim-aio.c b/jim-aio.c
index abc7482..6baab10 100644
--- a/jim-aio.c
+++ b/jim-aio.c
@@ -1585,6 +1585,9 @@ static int aio_cmd_sync(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
     AioFile *af = Jim_CmdPrivData(interp);
 
+    if (aio_flush(interp, af) != JIM_OK) {
+        return JIM_ERR;
+    }
     fsync(af->fd);
     return JIM_OK;
 }