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81f614533d
For macOS/iOS, UIO_MAXIOV is documented in writev(2), but <sys/uio.h> only declares it if defined(KERNEL) Inspired by a GStreamer MR by Jim Mason https://gitlab.freedesktop.org/gstreamer/gstreamer/merge_requests/277
63 lines
2.3 KiB
C
63 lines
2.3 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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#elif defined(__APPLE__)
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/* For macOS/iOS, UIO_MAXIOV is documented in writev(2), but <sys/uio.h>
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* only declares it if defined(KERNEL) */
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#define G_IOV_MAX 512
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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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