tycho / crisscross

A C++ library with various uses.

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crisscross / source / core_network.cpp
100644 83 lines (68 sloc) 1.573 kb
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/*
 *   CrissCross
 *   A multi-purpose cross-platform library.
 *
 *   A product of Uplink Laboratories.
 *
 *   (c) 2006-2009 Steven Noonan.
 *   Licensed under the New BSD License.
 *
 */
 
#include <crisscross/universal_include.h>
#include <crisscross/core_network.h>
 
#if !defined (TARGET_OS_WINDOWS)
#include <sys/socket.h>
#include <signal.h>
#endif
 
namespace
{
	int s_initialised = 0;
}
 
CrissCross::Errors CrissCross::Network::__initialise_network()
{
	if (!s_initialised) {
#ifdef TARGET_OS_WINDOWS
		/* Start up the windows networking */
		WORD version_wanted = MAKEWORD(2, 2);
		WSADATA wsaData;
 
		if (WSAStartup(version_wanted, &wsaData) != 0)
			return CC_ERR_INTERNAL;
 
		if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2)
			return CC_ERR_INTERNAL;
 
#else
		/* SIGPIPE is generated when a remote socket is closed */
		void (*handler)(int);
		handler = signal(SIGPIPE, SIG_IGN);
		if (handler != SIG_DFL) {
			signal(SIGPIPE, handler);
		}
 
#endif
	}
 
	++s_initialised;
	return CC_ERR_NONE;
}
 
CrissCross::Errors CrissCross::Network::__cleanup_network()
{
	if (s_initialised == 0) {
		return CC_ERR_NONE;
	}
 
	if (--s_initialised == 0) {
#ifdef TARGET_OS_WINDOWS
		/* Clean up windows networking */
		if (WSACleanup() == SOCKET_ERROR) {
			if (WSAGetLastError() == WSAEINPROGRESS) {
				WSACancelBlockingCall();
				WSACleanup();
			}
		}
 
#else
		/* Restore the SIGPIPE handler */
		void (*handler)(int);
		handler = signal(SIGPIPE, SIG_DFL);
		if (handler != SIG_IGN) {
			signal(SIGPIPE, handler);
		}
 
#endif
	}
 
	return CC_ERR_NONE;
}