103 lines
2.2 KiB
C++
103 lines
2.2 KiB
C++
/*
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* Copyright (C) 1998-2013 Paul Davis <paul@linuxaudiosystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __selectable_h__
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#define __selectable_h__
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#include <list>
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#include <string>
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#include <stdio.h>
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#include <sigc++/sigc++.h>
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#include <sys/types.h>
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#include "pbd/libpbd_visibility.h"
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namespace Select {
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enum LIBPBD_API Condition {
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Readable = 0x1,
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Writable = 0x2,
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Exception = 0x4
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};
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class LIBPBD_API Selectable : public sigc::trackable
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{
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public:
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Selectable (int fd);
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Selectable (const std::string &, int flags, int mode = 0);
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Selectable (FILE *);
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~Selectable ();
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sigc::signal<void,Selectable *,Select::Condition> readable;
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sigc::signal<void,Selectable *,Select::Condition> writable;
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sigc::signal<void,Selectable *,Select::Condition> exceptioned;
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int fd() { return _fd; }
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bool ok() { return _ok; }
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protected:
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void selected (unsigned int condition);
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int condition;
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int _fd;
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friend class Selector;
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private:
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enum {
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fromFD,
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fromPath,
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fromFILE
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};
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bool _ok;
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int _type;
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std::string path;
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};
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class LIBPBD_API Selector {
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private:
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int post_select (fd_set *, fd_set *, fd_set *);
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int _max_fd;
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typedef std::list<Selectable *> Selectables;
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Selectables selectables;
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pthread_mutex_t list_lock;
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static bool use_list_lock;
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public:
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Selector ();
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void multithreaded (bool yn) {
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use_list_lock = yn;
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}
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void add (int condition, Selectable *s);
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void remove (Selectable *);
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int select (unsigned long usecs);
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};
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} /* namespace */
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#endif // __selectable_h__
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