diff options
Diffstat (limited to 'dom/media/gmp/widevine-adapter/content_decryption_module_export.h')
| -rw-r--r-- | dom/media/gmp/widevine-adapter/content_decryption_module_export.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/dom/media/gmp/widevine-adapter/content_decryption_module_export.h b/dom/media/gmp/widevine-adapter/content_decryption_module_export.h new file mode 100644 index 0000000000..932708deba --- /dev/null +++ b/dom/media/gmp/widevine-adapter/content_decryption_module_export.h @@ -0,0 +1,38 @@ +// Copyright 2017 The Chromium 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 CDM_CONTENT_DECRYPTION_MODULE_EXPORT_H_ +#define CDM_CONTENT_DECRYPTION_MODULE_EXPORT_H_ + +// Define CDM_API so that functionality implemented by the CDM module +// can be exported to consumers. +#if defined(_WIN32) + +#if defined(CDM_IMPLEMENTATION) +#define CDM_API __declspec(dllexport) +#else +#define CDM_API __declspec(dllimport) +#endif // defined(CDM_IMPLEMENTATION) + +#else // defined(_WIN32) +#define CDM_API __attribute__((visibility("default"))) +#endif // defined(_WIN32) + +// Define CDM_CLASS_API to export class types. We have to add visibility +// attributes to make sure virtual tables in CDM consumer and CDM implementation +// are the same. Generally, it was always a good idea, as there're no guarantees +// about that for the internal symbols, but it has only become a practical issue +// after introduction of LTO devirtualization. See more details on +// https://crbug.com/609564#c35 +#if defined(_WIN32) +#if defined(__clang__) +#define CDM_CLASS_API [[clang::lto_visibility_public]] +#else +#define CDM_CLASS_API +#endif +#else // defined(_WIN32) +#define CDM_CLASS_API __attribute__((visibility("default"))) +#endif // defined(_WIN32) + +#endif // CDM_CONTENT_DECRYPTION_MODULE_EXPORT_H_ |