96 lines
3.3 KiB
C++
96 lines
3.3 KiB
C++
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/*
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oscpack -- Open Sound Control (OSC) packet manipulation library
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http://www.rossbencina.com/code/oscpack
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Copyright (c) 2004-2013 Ross Bencina <rossb@audiomulch.com>
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files
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(the "Software"), to deal in the Software without restriction,
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including without limitation the rights to use, copy, modify, merge,
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publish, distribute, sublicense, and/or sell copies of the Software,
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and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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The text above constitutes the entire oscpack license; however,
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the oscpack developer(s) also make the following non-binding requests:
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Any person wishing to distribute modifications to the Software is
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requested to send the modifications to the original developer so that
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they can be incorporated into the canonical version. It is also
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requested that these non-binding requests be included whenever the
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above license is reproduced.
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*/
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#include "ip/NetworkingUtils.h"
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#include <winsock2.h> // this must come first to prevent errors with MSVC7
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#include <windows.h>
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#include <cstring>
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static LONG initCount_ = 0;
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static bool winsockInitialized_ = false;
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NetworkInitializer::NetworkInitializer()
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{
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if( InterlockedIncrement( &initCount_ ) == 1 ){
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// there is a race condition here if one thread tries to access
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// the library while another is still initializing it.
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// i can't think of an easy way to fix it so i'm telling you here
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// incase you need to init the library from two threads at once.
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// this is why the header file advises to instantiate one of these
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// in main() so that the initialization happens globally
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// initialize winsock
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WSAData wsaData;
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int nCode = WSAStartup(MAKEWORD(1, 1), &wsaData);
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if( nCode != 0 ){
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//std::cout << "WSAStartup() failed with error code " << nCode << "\n";
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}else{
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winsockInitialized_ = true;
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}
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}
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}
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NetworkInitializer::~NetworkInitializer()
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{
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if( InterlockedDecrement( &initCount_ ) == 0 ){
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if( winsockInitialized_ ){
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WSACleanup();
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winsockInitialized_ = false;
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}
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}
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}
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unsigned long GetHostByName( const char *name )
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{
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NetworkInitializer networkInitializer;
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unsigned long result = 0;
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struct hostent *h = gethostbyname( name );
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if( h ){
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struct in_addr a;
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std::memcpy( &a, h->h_addr_list[0], h->h_length );
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result = ntohl(a.s_addr);
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}
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return result;
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}
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