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/***************************************************************************
cothread.h
Class wrapper around byuu's cothread library.
****************************************************************************
Copyright Aaron Giles
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name 'MAME' nor the names of its contributors may be
used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
#pragma once
#ifndef __EMU_H__
#error Dont include this file directly; include emu.h instead.
#endif
#ifndef __COTHREAD_H__
#define __COTHREAD_H__
#include "cothread/libco.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// delegate that points to a thread's entry
typedef delegate<void ()> cothread_entry_delegate;
// ======================> cothread
class cothread
{
public:
// construction/destruction
cothread(cothread_t existing_thread);
cothread(cothread_entry_delegate entry, size_t stack = 16384);
~cothread() { if (m_creator_cothread != NULL) co_delete(m_cothread); }
// switching
void make_active() { co_switch(m_cothread); }
private:
// internal helpers
static void cothread_entry();
// internal state
cothread_t m_cothread;
cothread_t m_creator_cothread;
cothread_entry_delegate m_entry;
// static state
static osd_lock * s_create_lock;
static cothread * s_create_cothread;
};
#endif // __COTHREAD_H__
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