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update comment; ignore argument on non-win

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This commit is contained in:
Nick Mathewson 2018-01-16 14:35:49 -05:00
parent 1efb84215e
commit 57eab23ea5
1 changed files with 11 additions and 3 deletions
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14
src/or/connection.c
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@ -3694,14 +3694,20 @@ connection_outbuf_too_full(connection_t *conn)
return (conn->outbuf_flushlen > 10*CELL_PAYLOAD_SIZE);
}
/** Fix slow upload for Windows Vista and Windows 7 systems (bug #22798).
* This achieved by tuning socket send buffer size according to hint,
* returned by SIO_IDEAL_SEND_BACKLOG_QUERY ioctl command.
/**
* On Windows Vista and Windows 7, tune the send buffer size according to a
* hint from the OS.
*
* This should help fix slow upload rates.
*/
static void
update_send_buffer_size(tor_socket_t sock)
{
#ifdef _WIN32
/* We only do this on Vista and 7, because earlier versions of Windows
* don't have the SIO_IDEAL_SEND_BACKLOG_QUERY functionality, and on
* later versions it isn't necessary. */
static int isVistaOr7 = -1;
if (isVistaOr7 == -1) {
isVistaOr7 = 0;
@ -3721,6 +3727,8 @@ update_send_buffer_size(tor_socket_t sock)
&isb, sizeof(isb), &bytesReturned, NULL, NULL)) {
setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (const char*)&isb, sizeof(isb));
}
#else
(void) sock;
#endif
}