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/*
Copyright (C) 1998-99 Paul Barton-Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __selectable_h__
#define __selectable_h__
#include <list>
#include <string>
#include <stdio.h>
#include <sigc++/sigc++.h>
#include <sys/types.h>
#include "pbd/libpbd_visibility.h"
namespace Select {
enum LIBPBD_API Condition {
Readable = 0x1,
Writable = 0x2,
Exception = 0x4
};
class LIBPBD_API Selectable : public sigc::trackable
{
public:
Selectable (int fd);
Selectable (const std::string &, int flags, int mode = 0);
Selectable (FILE *);
~Selectable ();
sigc::signal<void,Selectable *,Select::Condition> readable;
sigc::signal<void,Selectable *,Select::Condition> writable;
sigc::signal<void,Selectable *,Select::Condition> exceptioned;
int fd() { return _fd; }
bool ok() { return _ok; }
protected:
void selected (unsigned int condition);
int condition;
int _fd;
friend class Selector;
private:
enum {
fromFD,
fromPath,
fromFILE
};
bool _ok;
int _type;
std::string path;
};
class LIBPBD_API Selector {
private:
int post_select (fd_set *, fd_set *, fd_set *);
int _max_fd;
typedef std::list<Selectable *> Selectables;
Selectables selectables;
pthread_mutex_t list_lock;
static bool use_list_lock;
public:
Selector ();
void multithreaded (bool yn) {
use_list_lock = yn;
}
void add (int condition, Selectable *s);
void remove (Selectable *);
int select (unsigned long usecs);
};
} /* namespace */
#endif // __selectable_h__
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