1 /* 2 * Copyright (c) 2021-2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 #ifndef RENDER_SERVICE_CLIENT_CORE_COMMON_RS_MACROS_H 16 #define RENDER_SERVICE_CLIENT_CORE_COMMON_RS_MACROS_H 17 18 /** about export template (most at _WIN32 platform) 19 * Sometimes other module maybe use instantiated template classes or instantiate their own template class. 20 * for example: arkui will use RSRenderAnimatableProperty<float> and instantiate the template 21 * with type "NG::ColorBlend", so we need export instantiated template classes but cannot export 22 * template itself. Because if you RSB_EXPORT the template, arkui will think the symbol 23 * RSRenderAnimatableProperty<NG::ColorBlend> is importing from other module, 24 * linker then raise a link problem. 25 * 26 * So we should use RSB_EXPORT_TMP and use extern template & template to tell arkui that there are many 27 * instantiated template classes, you don't need instantiate again. 28 * 29 * correct way: 30 * base view: 31 * EXPORT RSRenderAnimatableProperty<T> 32 * extern template class RSRenderAnimatableProperty<float>; 33 * (in cpp) template class RSRenderAnimatableProperty<float>; 34 * arkui view: 35 * RSRenderAnimatableProperty<T> 36 * extern template class RSRenderAnimatableProperty<float>; 37 */ 38 39 #ifdef _WIN32 40 #define RS_EXPORT __attribute__((dllexport)) 41 #define RS_IMPORT __attribute__((dllimport)) 42 #else 43 #define RS_EXPORT __attribute__((visibility("default"))) 44 #define RS_IMPORT __attribute__((visibility("default"))) 45 #endif 46 47 #ifdef MODULE_RSB 48 #define RSB_EXPORT RS_EXPORT 49 #define RSB_EXPORT_TMP RS_EXPORT 50 #else 51 #define RSB_EXPORT RS_IMPORT 52 #define RSB_EXPORT_TMP 53 #endif 54 55 #ifdef MODULE_RSC 56 #define RSC_EXPORT RS_EXPORT 57 #define RSC_EXPORT_TMP RS_EXPORT 58 #else 59 #define RSC_EXPORT RS_IMPORT 60 #define RSC_EXPORT_TMP 61 #endif 62 63 #endif // RENDER_SERVICE_CLIENT_CORE_COMMON_RS_MACROS_H 64