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Diffstat (limited to 'trunk/src/emu/cothread.h')
-rw-r--r-- | trunk/src/emu/cothread.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/trunk/src/emu/cothread.h b/trunk/src/emu/cothread.h new file mode 100644 index 00000000000..e75dee02f59 --- /dev/null +++ b/trunk/src/emu/cothread.h @@ -0,0 +1,88 @@ +/*************************************************************************** + + 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 = 1048576); + ~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__ |