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/*
* Copyright 2003-2018 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 "PollResultGeneric.hxx"
#include <assert.h>
#include <string.h>
#include <unordered_map>
#include <windows.h>
#include <winsock2.h>
/* ERROR is a WIN32 macro that poisons our namespace; this is a kludge
to allow us to use it anyway */
#ifdef ERROR
#undef ERROR
#endif
class SocketSet
{
fd_set set;
public:
SocketSet() noexcept {
set.fd_count = 0;
}
SocketSet(const SocketSet &other) noexcept {
set.fd_count = other.set.fd_count;
memcpy(set.fd_array,
other.set.fd_array,
sizeof (SOCKET) * set.fd_count);
}
fd_set *GetPtr() noexcept {
return &set;
}
size_t Size() const noexcept {
return set.fd_count;
}
bool IsEmpty() const noexcept {
return set.fd_count == 0;
}
bool IsFull() const noexcept {
return set.fd_count == FD_SETSIZE;
}
int operator[](size_t index) const noexcept {
assert(index < set.fd_count);
return set.fd_array[index];
}
size_t Add(int fd) noexcept {
assert(!IsFull());
set.fd_array[set.fd_count] = fd;
return set.fd_count++;
}
void MoveToEnd(size_t index) noexcept {
assert(index < set.fd_count);
std::swap(set.fd_array[index], set.fd_array[set.fd_count - 1]);
}
void RemoveLast() noexcept {
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) const noexcept;
void Modify(Item &item, int fd, unsigned events,
int event_id) noexcept;
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() noexcept;
~PollGroupWinSelect() noexcept;
void ReadEvents(PollResultGeneric &result, int timeout_ms) noexcept;
bool Add(int fd, unsigned events, void *obj) noexcept;
bool Modify(int fd, unsigned events, void *obj) noexcept;
bool Remove(int fd) noexcept;
bool Abandon(int fd) noexcept {
return Remove(fd);
}
};
#endif
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