diff --git a/src/libecmaoperations/ecma-try-catch-macro.h b/src/libecmaoperations/ecma-try-catch-macro.h new file mode 100644 index 000000000..1b47559ef --- /dev/null +++ b/src/libecmaoperations/ecma-try-catch-macro.h @@ -0,0 +1,52 @@ +/* Copyright 2014 Samsung Electronics Co., Ltd. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef ECMA_TRY_CATCH_MACRO_H +#define ECMA_TRY_CATCH_MACRO_H + +/** + * The macro defines try-block that initializes variable 'var' with 'op' + * and checks for exceptions that might be thrown during initialization. + * + * If no exception was thrown, then code after the try-block is executed. + * Otherwise, throw-completion value is just copied to return_value. + * + * Note: + * Each ECMA_TRY_CATCH should have it's own corresponding ECMA_FINALIZE + * statement with same argument as corresponding ECMA_TRY_CATCH's first argument. + */ +#define ECMA_TRY_CATCH(var, op, return_value) \ + ecma_completion_value_t var = op; \ + if ( unlikely( ecma_is_completion_value_throw( var) ) ) \ + { \ + return_value = ecma_copy_completion_value( var); \ + } \ + else \ + { \ + JERRY_ASSERT( ecma_is_completion_value_normal( var) ) + +/** + * The macro marks end of code block that is executed if no exception + * was catched by corresponding ECMA_TRY_CATCH and frees variable, + * initialized by the ECMA_TRY_CATCH. + * + * Note: + * Each ECMA_TRY_CATCH should be followed by ECMA_FINALIZE with same + * argument as corresponding ECMA_TRY_CATCH's first argument. + */ +#define ECMA_FINALIZE(var) } \ + ecma_free_completion_value( var) + +#endif /* !ECMA_TRY_CATCH_MACRO_H */