Commit f636ae85 authored by Alberto Garcia's avatar Alberto Garcia Committed by Max Reitz
Browse files

block: Add blk_get_refcnt() 



This function returns the reference count of a given BlockBackend.
For convenience, it returns 0 if the BlockBackend pointer is NULL.

Signed-off-by: default avatarAlberto Garcia <berto@igalia.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
Message-id: dfdd8a17dbe3288842840636d2cfe5bb895abcb0.1446475331.git.berto@igalia.com
Signed-off-by: default avatarMax Reitz <mreitz@redhat.com>
parent 10f3cd15

block/block-backend.c

+5 −0
Original line number Diff line number Diff line
@@ -189,6 +189,11 @@ static void drive_info_del(DriveInfo *dinfo) 
    g_free(dinfo);

}



int blk_get_refcnt(BlockBackend *blk)

{

    return blk ? blk->refcnt : 0;

}



/*

 * Increment @blk's reference count.

 * @blk must not be null.

include/sysemu/block-backend.h

+1 −0
Original line number Diff line number Diff line
@@ -65,6 +65,7 @@ BlockBackend *blk_new_with_bs(const char *name, Error **errp); 
BlockBackend *blk_new_open(const char *name, const char *filename,

                           const char *reference, QDict *options, int flags,

                           Error **errp);

int blk_get_refcnt(BlockBackend *blk);

void blk_ref(BlockBackend *blk);

void blk_unref(BlockBackend *blk);

const char *blk_name(BlockBackend *blk);