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+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_EVENT_POLLGROUP_WINSELECT_HXX
+#define MPD_EVENT_POLLGROUP_WINSELECT_HXX
+
+#include "check.h"
+
+#include "PollResultGeneric.hxx"
+
+#include <assert.h>
+#include <string.h>
+
+#include <unordered_map>
+
+#include <windows.h>
+#include <winsock2.h>
+
+#ifdef ERROR
+#undef ERROR
+#endif
+
+class SocketSet
+{
+ fd_set set;
+public:
+ SocketSet() { set.fd_count = 0; }
+ SocketSet(SocketSet &other) {
+ set.fd_count = other.set.fd_count;
+ memcpy(set.fd_array,
+ other.set.fd_array,
+ sizeof (SOCKET) * set.fd_count);
+ }
+
+ fd_set *GetPtr() { return &set; }
+ int Size() { return set.fd_count; }
+ bool IsEmpty() { return set.fd_count == 0; }
+ bool IsFull() { return set.fd_count == FD_SETSIZE; }
+
+ int operator[](int index) {
+ assert(index >= 0 && (u_int)index < set.fd_count);
+ return set.fd_array[index];
+ }
+
+ int Add(int fd) {
+ assert(!IsFull());
+ set.fd_array[set.fd_count] = fd;
+ return set.fd_count++;
+ }
+
+ void MoveToEnd(int index) {
+ assert(index >= 0 && (u_int)index < set.fd_count);
+ std::swap(set.fd_array[index], set.fd_array[set.fd_count - 1]);
+ }
+
+ void RemoveLast() {
+ assert(!IsEmpty());
+ --set.fd_count;
+ }
+};
+
+class PollGroupWinSelect
+{
+ struct Item
+ {
+ int index[2];
+ void *obj;
+ unsigned events;
+ };
+
+ SocketSet event_set[2];
+ std::unordered_map<int, Item> items;
+
+ bool CanModify(Item &item, unsigned events, int event_id);
+ void Modify(Item &item, int fd, unsigned events, int event_id);
+
+ PollGroupWinSelect(PollGroupWinSelect &) = delete;
+ PollGroupWinSelect &operator=(PollGroupWinSelect &) = delete;
+public:
+ static constexpr unsigned READ = 1;
+ static constexpr unsigned WRITE = 2;
+ static constexpr unsigned ERROR = 0;
+ static constexpr unsigned HANGUP = 0;
+
+ PollGroupWinSelect();
+ ~PollGroupWinSelect();
+
+ void ReadEvents(PollResultGeneric &result, int timeout_ms);
+ bool Add(int fd, unsigned events, void *obj);
+ bool Modify(int fd, unsigned events, void *obj);
+ bool Remove(int fd);
+ bool Abandon(int fd) { return Remove(fd); }
+};
+
+#endif