diff options
author | Anand Avati <avati@redhat.com> | 2013-03-06 01:11:59 -0800 |
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committer | Anand Avati <avati@redhat.com> | 2013-09-03 11:25:33 -0700 |
commit | 0d60175bd684cf6a14f750579d82dbd1ba97fcbc (patch) | |
tree | 1571f530548196006526442f3fc027cb623bb6fa /contrib/qemu/include/qemu/notify.h | |
parent | 7dbfbfd3694e02b90e8f3ce509f5279da1523a02 (diff) |
contrib/qemu: Import qemu block source code
This qemu block format source code and its minimal
dependency files will be used in the next patch to implement
a qemu-block format translator.
Change-Id: Ic87638972f7ea9b3df84d7a0539512a250c11c1c
BUG: 986775
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/5366
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Diffstat (limited to 'contrib/qemu/include/qemu/notify.h')
-rw-r--r-- | contrib/qemu/include/qemu/notify.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/contrib/qemu/include/qemu/notify.h b/contrib/qemu/include/qemu/notify.h new file mode 100644 index 00000000000..a3d73e4bc76 --- /dev/null +++ b/contrib/qemu/include/qemu/notify.h @@ -0,0 +1,72 @@ +/* + * Notifier lists + * + * Copyright IBM, Corp. 2010 + * + * Authors: + * Anthony Liguori <aliguori@us.ibm.com> + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + */ + +#ifndef QEMU_NOTIFY_H +#define QEMU_NOTIFY_H + +#include "qemu/queue.h" + +typedef struct Notifier Notifier; + +struct Notifier +{ + void (*notify)(Notifier *notifier, void *data); + QLIST_ENTRY(Notifier) node; +}; + +typedef struct NotifierList +{ + QLIST_HEAD(, Notifier) notifiers; +} NotifierList; + +#define NOTIFIER_LIST_INITIALIZER(head) \ + { QLIST_HEAD_INITIALIZER((head).notifiers) } + +void notifier_list_init(NotifierList *list); + +void notifier_list_add(NotifierList *list, Notifier *notifier); + +void notifier_remove(Notifier *notifier); + +void notifier_list_notify(NotifierList *list, void *data); + +/* Same as Notifier but allows .notify() to return errors */ +typedef struct NotifierWithReturn NotifierWithReturn; + +struct NotifierWithReturn { + /** + * Return 0 on success (next notifier will be invoked), otherwise + * notifier_with_return_list_notify() will stop and return the value. + */ + int (*notify)(NotifierWithReturn *notifier, void *data); + QLIST_ENTRY(NotifierWithReturn) node; +}; + +typedef struct NotifierWithReturnList { + QLIST_HEAD(, NotifierWithReturn) notifiers; +} NotifierWithReturnList; + +#define NOTIFIER_WITH_RETURN_LIST_INITIALIZER(head) \ + { QLIST_HEAD_INITIALIZER((head).notifiers) } + +void notifier_with_return_list_init(NotifierWithReturnList *list); + +void notifier_with_return_list_add(NotifierWithReturnList *list, + NotifierWithReturn *notifier); + +void notifier_with_return_remove(NotifierWithReturn *notifier); + +int notifier_with_return_list_notify(NotifierWithReturnList *list, + void *data); + +#endif |