static void
mm_bufmgr_destroy(struct pb_manager *mgr)
{
struct mm_pb_manager *mm = mm_pb_manager(mgr);
mtx_lock(&mm->mutex);
u_mmDestroy(mm->heap);
pb_unmap(mm->buffer);
pb_reference(&mm->buffer, NULL);
mtx_unlock(&mm->mutex);
FREE(mgr);
}
struct pb_manager *
mm_bufmgr_create_from_buffer(struct pb_buffer *buffer,
pb_size size, pb_size align2)
{
struct mm_pb_manager *mm;
if(!buffer)
return NULL;
mm = CALLOC_STRUCT(mm_pb_manager);
if (!mm)
return NULL;
mm->base.destroy = mm_bufmgr_destroy;
mm->base.create_buffer = mm_bufmgr_create_buffer;
mm->base.flush = mm_bufmgr_flush;
mm->size = size;
mm->align2 = align2; /* 64-byte alignment */
pipe_mutex_init(mm->mutex);
mm->buffer = buffer;
mm->map = pb_map(mm->buffer,
PIPE_BUFFER_USAGE_CPU_READ |
PIPE_BUFFER_USAGE_CPU_WRITE);
if(!mm->map)
goto failure;
mm->heap = u_mmInit(0, (int)size);
if (!mm->heap)
goto failure;
return SUPER(mm);
failure:
if(mm->heap)
u_mmDestroy(mm->heap);
if(mm->map)
pb_unmap(mm->buffer);
if(mm)
FREE(mm);
return NULL;
}
