glib/gio/gnetworking.c
Dan Winship b377e69685 Add gnetworking.h
Install a public "gnetworking.h" header that can be used to include
the relevant OS-dependent networking headers. This does not really
abstract away unix-vs-windows however; error codes, in particular,
are incompatible.

gnetworkingprivate.h now contains just a few internal URI-related
functions

Also add a g_networking_init() function to gnetworking.h, which can be
used to explicitly initialize OS-level networking, rather than having
that happen as a side-effect of registering GInetAddress.

https://bugzilla.gnome.org/show_bug.cgi?id=623187
2012-12-12 15:20:22 +01:00

80 lines
2.6 KiB
C

/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2011 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "gnetworking.h"
/**
* SECTION:gnetworking
* @title: gnetworking.h
* @short_description: System networking includes
* @include: gio/gnetworking.h
*
* The <literal>gnetworking.h</literal> header can be included to get
* various low-level networking-related system headers, automatically
* taking care of certain portability issues for you.
*
* This can be used, for example, if you want to call setsockopt()
* on a #GSocket.
*
* Note that while WinSock has many of the same APIs as the
* traditional UNIX socket API, most of them behave at least slightly
* differently (particularly with respect to error handling). If you
* want your code to work under both UNIX and Windows, you will need
* to take these differences into account.
*
* Also, under glibc, certain non-portable functions are only visible
* in the headers if you define <literal>_GNU_SOURCE</literal> before
* including them. Note that this symbol must be defined before
* including <emphasis>any</emphasis> headers, or it may not take
* effect.
*/
/**
* g_networking_init:
*
* Initializes the platform networking libraries (eg, on Windows, this
* calls WSAStartup()). GLib will call this itself if it is needed, so
* you only need to call it if you directly call system networking
* functions (without calling any GLib networking functions first).
*
* Since: 2.36
*/
void
g_networking_init (void)
{
#ifdef G_OS_WIN32
static volatile gsize inited = 0;
if (g_once_init_enter (&inited))
{
WSADATA wsadata;
if (WSAStartup (MAKEWORD (2, 0), &wsadata) != 0)
g_error ("Windows Sockets could not be initialized");
g_once_init_leave (&inited, 1);
}
#endif
}