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20a2c379c4
More vectors will give an error and we can simply clamp here and consider it like a short write instead. In case of GSocketOutputStream this is done here instead of inside GSocket before calling sendmsg() because we we can't generically handle short writes when sending messages on a socket, e.g. for datagram sockets this causes only part of the datagram to be sent and an error would be more useful in this case than sending corrupted data. Also reduce the fallback limit to 16 in gsocket.c as that's the minimum value required by POSIX and add a static assertion that the limit is never bigger than G_MAXINT as that's the type recvmmsg/sendmmsg take.
59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2013 Collabora Ltd.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __G_IO_PRIVATE_H__
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#define __G_IO_PRIVATE_H__
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#include "ginputstream.h"
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#include "goutputstream.h"
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#include "gsocketconnection.h"
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#include "gsocketaddress.h"
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G_BEGIN_DECLS
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gboolean g_input_stream_async_read_is_via_threads (GInputStream *stream);
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gboolean g_input_stream_async_close_is_via_threads (GInputStream *stream);
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gboolean g_output_stream_async_write_is_via_threads (GOutputStream *stream);
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gboolean g_output_stream_async_writev_is_via_threads (GOutputStream *stream);
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gboolean g_output_stream_async_close_is_via_threads (GOutputStream *stream);
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void g_socket_connection_set_cached_remote_address (GSocketConnection *connection,
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GSocketAddress *address);
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/* POSIX defines IOV_MAX/UIO_MAXIOV as the maximum number of iovecs that can
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* be sent in one go. We define our own version of it here as there are two
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* possible names, and also define a fall-back value if none of the constants
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* are defined */
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#if defined(IOV_MAX)
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#define G_IOV_MAX IOV_MAX
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#elif defined(UIO_MAXIOV)
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#define G_IOV_MAX UIO_MAXIOV
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#else
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/* 16 is the minimum value required by POSIX */
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#define G_IOV_MAX 16
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#endif
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/* The various functions taking iovecs as parameter use a plain int
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* for the number of vectors. Limit it to G_MAXINT for this reason.
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*/
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G_STATIC_ASSERT (G_IOV_MAX <= G_MAXINT);
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G_END_DECLS
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#endif /* __G_IO_PRIVATE__ */
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