src/devices/sysmem/drivers/sysmem/koid_util.h

// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SRC_DEVICES_SYSMEM_DRIVERS_SYSMEM_KOID_UTIL_H_
#define SRC_DEVICES_SYSMEM_DRIVERS_SYSMEM_KOID_UTIL_H_

#include <lib/fpromise/result.h>
#include <lib/zx/channel.h>
#include <zircon/assert.h>
#include <zircon/types.h>

#include <vector>

#include "src/devices/sysmem/drivers/sysmem/macros.h"

namespace sysmem_driver {

zx_status_t get_handle_koids(const zx::object_base& this_end, zx_koid_t* this_end_koid,
                             zx_koid_t* that_end_koid, zx_obj_type_t type);

template<class T>
zx_koid_t get_koid(const zx::object<T>& object) {
    zx_koid_t this_end_koid;
    zx_koid_t that_end_koid;
    zx_status_t result = get_handle_koids(object, &this_end_koid, &that_end_koid, T::TYPE);
    if (result != ZX_OK) {
        return ZX_KOID_INVALID;
    }
    return this_end_koid;
}

}  // namespace sysmem_driver

#endif  // SRC_DEVICES_SYSMEM_DRIVERS_SYSMEM_KOID_UTIL_H_