C++ (Cpp) _mref_check Examples

Example #1

File: mars_aio.c Project: ZyanKLee/mars

static
void _complete_mref(struct aio_output *output, struct mref_object *mref, int err)
{
	struct aio_mref_aspect *mref_a;
	_mref_check(mref);
	mref_a = aio_mref_get_aspect(output->brick, mref);
	CHECK_PTR(mref_a, fatal);
	_complete(output, mref_a, err);
	return;

fatal:
	MARS_FAT("bad pointer, giving up...\n");
}

Example #2

static void aio_ref_io(struct aio_output *output, struct mref_object *mref)
{
	struct aio_threadinfo *tinfo = &output->tinfo[0];
	struct aio_mref_aspect *mref_a;
	int err = -EINVAL;

	_mref_check(mref);

	if (unlikely(!output->brick->power.led_on)) {
		SIMPLE_CALLBACK(mref, -EBADFD);
		return;
	}

	_mref_get(mref);
	atomic_inc(&mars_global_io_flying);
	atomic_inc(&output->work_count);

	// statistics
	if (mref->ref_rw) {
		atomic_inc(&output->total_write_count);
		atomic_inc(&output->write_count);
	} else {
		atomic_inc(&output->total_read_count);
		atomic_inc(&output->read_count);
	}

	if (unlikely(!output->mf || !output->mf->mf_filp)) {
		goto done;
	}

	mapfree_set(output->mf, mref->ref_pos, -1);

	MARS_IO("AIO rw=%d pos=%lld len=%d data=%p\n", mref->ref_rw, mref->ref_pos, mref->ref_len, mref->ref_data);

	mref_a = aio_mref_get_aspect(output->brick, mref);
	if (unlikely(!mref_a)) {
		goto done;
	}

	_enqueue(tinfo, mref_a, mref->ref_prio, true);
	return;

done:
	_complete_mref(output, mref, err);
}

Example #3

File: mars_usebuf.c Project: 1and1/mars

static void usebuf_ref_io(struct usebuf_output *output, struct mref_object *mref)
{
	struct usebuf_input *input = output->brick->inputs[0];
	struct usebuf_mref_aspect *mref_a;
	struct usebuf_mref_aspect *sub_mref_a;
	struct mref_object *sub_mref;
	int error = -EILSEQ;

	might_sleep();

	_mref_check(mref);

	mref_a = usebuf_mref_get_aspect(output->brick, mref);
	if (unlikely(!mref_a)) {
		MARS_FAT("cannot get aspect\n");
		goto err;
	}

	sub_mref_a = mref_a->sub_mref_a;
	if (!sub_mref_a) {
		MARS_FAT("sub_mref is missing\n");
		goto err;
	}

	sub_mref = sub_mref_a->object;
	if (!sub_mref) {
		MARS_FAT("sub_mref is missing\n");
		goto err;
	}

	if (mref->ref_rw != 0 && sub_mref->ref_may_write == 0) {
		MARS_ERR("mref_may_write was not set before\n");
		goto err;
	}

	_mref_get(mref);

	sub_mref->ref_rw = mref->ref_rw;
	sub_mref->ref_len = mref->ref_len;
	mref_a->input = input;
	/* Optimization: when buffered IO is used and buffer is already
	 * uptodate, skip real IO operation.
	 */
	if (mref->ref_rw != 0) {
#ifdef DIRECT_WRITE
		sub_mref->ref_rw = 1;
#else // normal case
		sub_mref->ref_rw = 0;
		if (sub_mref->ref_flags & MREF_UPTODATE) {
			sub_mref->ref_rw = 1;
		}
#endif
	} else if (sub_mref->ref_flags & MREF_UPTODATE) {
		MARS_IO("direct _usebuf_endio\n");
		_usebuf_endio(sub_mref->object_cb);
		return;
	}
	if (mref->ref_data != sub_mref->ref_data) {
		if (sub_mref->ref_rw != 0) {
			_usebuf_copy(mref, sub_mref, 1);
			mref->ref_flags |= MREF_UPTODATE;
		}
	}

#ifdef FAKE_ALL
	_usebuf_endio(sub_mref->ref_cb);
	return;
#endif
	GENERIC_INPUT_CALL(input, mref_io, sub_mref);

	return;

err:
	SIMPLE_CALLBACK(mref, error);
	return;
}