| // 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. |
| |
| #include "koid_util.h" |
| |
| #include <zircon/assert.h> |
| #include <zircon/errors.h> |
| |
| namespace sysmem_driver { |
| |
| zx_status_t get_channel_koids(const zx::channel& this_end, zx_koid_t* this_end_koid, |
| zx_koid_t* that_end_koid) { |
| ZX_DEBUG_ASSERT(this_end_koid); |
| ZX_DEBUG_ASSERT(that_end_koid); |
| zx_info_handle_basic_t token_info{}; |
| size_t actual_count = 0; |
| size_t avail_count = 0; |
| zx_status_t get_info_status = this_end.get_info(ZX_INFO_HANDLE_BASIC, &token_info, |
| sizeof(token_info), &actual_count, &avail_count); |
| if (get_info_status != ZX_OK) { |
| return get_info_status; |
| } |
| ZX_DEBUG_ASSERT(actual_count == 1); |
| ZX_DEBUG_ASSERT(avail_count == 1); |
| if (token_info.type != ZX_OBJ_TYPE_CHANNEL) { |
| return ZX_ERR_WRONG_TYPE; |
| } |
| ZX_DEBUG_ASSERT(token_info.koid != 0); |
| ZX_DEBUG_ASSERT(token_info.related_koid != 0); |
| *this_end_koid = token_info.koid; |
| *that_end_koid = token_info.related_koid; |
| return ZX_OK; |
| } |
| |
| } // namespace sysmem_driver |
