Commit 4728b574 authored by Peter Xu's avatar Peter Xu Committed by Eduardo Habkost
Browse files

hostmem: introduce host_memory_backend_mr_inited() 



We were checking this against memory region size of host memory
backend's mr field to see whether the mr has been inited. This is
efficient but less elegant. Let's make a helper for it to avoid
confusions, along with some notes.

Suggested-by: default avatarPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: default avatarPeter Xu <peterx@redhat.com>
Message-Id: <1489151370-15453-2-git-send-email-peterx@redhat.com>
Reviewed-by: default avatarEduardo Habkost <ehabkost@redhat.com>
Signed-off-by: default avatarEduardo Habkost <ehabkost@redhat.com>
parent 991db247

backends/hostmem.c

+9 −0
Original line number Diff line number Diff line
@@ -237,6 +237,15 @@ static void host_memory_backend_init(Object *obj) 
    backend->prealloc = mem_prealloc;

}



bool host_memory_backend_mr_inited(HostMemoryBackend *backend)

{

    /*

     * NOTE: We forbid zero-length memory backend, so here zero means

     * "we haven't inited the backend memory region yet".

     */

    return memory_region_size(&backend->mr) != 0;

}



MemoryRegion *

host_memory_backend_get_memory(HostMemoryBackend *backend, Error **errp)

{

include/sysemu/hostmem.h

+1 −0
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ struct HostMemoryBackend { 
    MemoryRegion mr;

};



bool host_memory_backend_mr_inited(HostMemoryBackend *backend);

MemoryRegion *host_memory_backend_get_memory(HostMemoryBackend *backend,

                                             Error **errp);