diff options
Diffstat (limited to 'xlators/features/qemu-block/src/coroutine-synctask.h')
-rw-r--r-- | xlators/features/qemu-block/src/coroutine-synctask.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/xlators/features/qemu-block/src/coroutine-synctask.h b/xlators/features/qemu-block/src/coroutine-synctask.h new file mode 100644 index 00000000000..0f0aa99cc69 --- /dev/null +++ b/xlators/features/qemu-block/src/coroutine-synctask.h @@ -0,0 +1,51 @@ +/* + Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com> + This file is part of GlusterFS. + + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ + +#ifndef __COROUTINE_SYNCTASK_H +#define __COROUTINE_SYNCTASK_H + +#include "syncop.h" +#include "block/coroutine_int.h" +#include "qemu-common.h" +#include "block/coroutine_int.h" + +/* + Three entities: + + synctask - glusterfs implementation of xlator friendly lightweight threads + Coroutine - qemu coroutine API for its block drivers + CoroutineSynctask - implementation of Coroutine using synctasks + + Coroutine is an "embedded" structure inside CoroutineSynctask, called "base". + + E.g: + + Coroutine *co; + CoroutineSynctask *cs; + struct synctask *synctask; + + cs == synctask->opaque; + co == &(cs->base); + cs = DO_UPCAST(CoroutineSynctask, base, co); + synctask == cs->synctask; + +*/ + +typedef struct { + Coroutine base; + struct synctask *synctask; + CoroutineAction action; + bool run; + bool die; +} CoroutineSynctask; + + + +#endif /* !__COROUTINE_SYNCTASK_H */ |