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7b52ccbfc4
This reverts commit 476e33c3f3.
We’ve decided to remove `G_OS_DARWIN` in favour of recommending people
use `__APPLE__` instead. As per the discussion on #2802 and linked
issues,
* Adding a new define shifts the complexity from “which of these
platform-provided defines do I use” to “which platform-provided
defines does G_OS_DARWIN use”
* There should ideally be no cases where a user of GLib has to use
their own platform-specific code, since GLib should be providing
appropriate abstractions
* Providing a single `G_OS_DARWIN` to cover all Apple products (macOS
and iOS) hides the complexity of what the user is actually testing:
are they testing for the Mach kernel, the Carbon and/or Cocoa user
space toolkits, macOS vs iOS vs tvOS, etc
Helps: #2802
65 lines
2.3 KiB
C
65 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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* SPDX-License-Identifier: LGPL-2.1-or-later
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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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