compat.h

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef BITCOIN_COMPAT_H
#define BITCOIN_COMPAT_H
 
#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif
 
#ifdef WIN32
#ifndef NOMINMAX
#define NOMINMAX
#endif
#ifdef FD_SETSIZE
#undef FD_SETSIZE // prevent redefinition compiler warning
#endif
#define FD_SETSIZE 1024 // max number of fds in fd_set
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <arpa/inet.h>
#include <climits>
#include <ifaddrs.h>
#include <net/if.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/fcntl.h>
#include <sys/mman.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#endif
 
#ifndef WIN32
typedef unsigned int SOCKET;
#include <cerrno>
#define WSAGetLastError() errno
#define WSAEINVAL EINVAL
#define WSAEALREADY EALREADY
#define WSAEWOULDBLOCK EWOULDBLOCK
#define WSAEAGAIN EAGAIN
#define WSAEMSGSIZE EMSGSIZE
#define WSAEINTR EINTR
#define WSAEINPROGRESS EINPROGRESS
#define WSAEADDRINUSE EADDRINUSE
#define WSAENOTSOCK EBADF
#define INVALID_SOCKET (SOCKET)(~0)
#define SOCKET_ERROR -1
#else
#ifndef WSAEAGAIN
#ifdef EAGAIN
#define WSAEAGAIN EAGAIN
#else
#define WSAEAGAIN WSAEWOULDBLOCK
#endif
#endif
#endif
 
#ifdef WIN32
#ifndef S_IRUSR
#define S_IRUSR 0400
#define S_IWUSR 0200
#endif
#else
#define MAX_PATH 1024
#endif
#ifdef _MSC_VER
#if !defined(ssize_t)
#ifdef _WIN64
typedef int64_t ssize_t;
#else
typedef int32_t ssize_t;
#endif
#endif
#endif
 
#if HAVE_DECL_STRNLEN == 0
size_t strnlen(const char *start, size_t max_len);
#endif // HAVE_DECL_STRNLEN
 
#ifndef WIN32
typedef void *sockopt_arg_type;
#else
typedef char *sockopt_arg_type;
#endif
 
// Note these both should work with the current usage of poll, but best to be
// safe
// WIN32 poll is broken
// https://daniel.haxx.se/blog/2012/10/10/wsapoll-is-broken/
// __APPLE__ poll is broke
// https://github.com/bitcoin/bitcoin/pull/14336#issuecomment-437384408
#if defined(__linux__)
#define USE_POLL
#endif
 
static bool inline IsSelectableSocket(const SOCKET &s) {
#if defined(USE_POLL) || defined(WIN32)
    return true;
#else
    return (s < FD_SETSIZE);
#endif
}
 
// MSG_NOSIGNAL is not available on some platforms, if it doesn't exist define
// it as 0
#if !defined(MSG_NOSIGNAL)
#define MSG_NOSIGNAL 0
#endif
 
// MSG_DONTWAIT is not available on some platforms, if it doesn't exist define
// it as 0
#if !defined(MSG_DONTWAIT)
#define MSG_DONTWAIT 0
#endif
 
#endif // BITCOIN_COMPAT_H