https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=b1952c03a8d6970f0fb4bcfffb9cfb5b525884d6
commit b1952c03a8d6970f0fb4bcfffb9cfb5b525884d6 Author: Mark Geisert <[email protected]> Date: Mon Aug 6 22:54:06 2018 -0700 Fix return value on aio_read/write success Internally track resultant byte counts as ssize_t, but return 0 as int for success indication, per POSIX. Diff: --- winsup/cygwin/aio.cc | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/winsup/cygwin/aio.cc b/winsup/cygwin/aio.cc index fe63dec..7d5d982 100644 --- a/winsup/cygwin/aio.cc +++ b/winsup/cygwin/aio.cc @@ -265,7 +265,7 @@ aiowaiter (void *unused) } } -static int +static ssize_t asyncread (struct aiocb *aio) { /* Try to initiate an asynchronous read, either from app or worker thread */ ssize_t res = 0; @@ -296,7 +296,7 @@ asyncread (struct aiocb *aio) return res; } -static int +static ssize_t asyncwrite (struct aiocb *aio) { /* Try to initiate an asynchronous write, either from app or worker thread */ ssize_t res = 0; @@ -712,7 +712,7 @@ aio_read (struct aiocb *aio) ; /* I think this is not possible */ } - return res; + return res < 0 ? (int) res : 0; /* return 0 on success */ } ssize_t @@ -902,7 +902,7 @@ aio_write (struct aiocb *aio) ; /* I think this is not possible */ } - return res; + return res < 0 ? (int) res : 0; /* return 0 on success */ } int
