mirror of
https://github.com/jerryscript-project/jerryscript.git
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136 lines
4.0 KiB
C
136 lines
4.0 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef JERRYX_HANDLE_SCOPE_H
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#define JERRYX_HANDLE_SCOPE_H
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#include "jerryscript.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif /* __cplusplus */
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#ifndef JERRYX_HANDLE_PRELIST_SIZE
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#define JERRYX_HANDLE_PRELIST_SIZE 20
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#endif
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#ifndef JERRYX_SCOPE_PRELIST_SIZE
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#define JERRYX_SCOPE_PRELIST_SIZE 20
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#endif
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#define STATIC_ASSERT(COND,MSG) typedef char static_assertion_##MSG[(COND)?1:-1]
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STATIC_ASSERT (JERRYX_SCOPE_PRELIST_SIZE < 32, JERRYX_SCOPE_PRELIST_SIZE_must_be_less_than_size_of_uint8_t);
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#undef STATIC_ASSERT
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typedef struct jerryx_handle_t jerryx_handle_t;
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/**
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* Dynamically allocated handle in the scopes.
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* Scopes has it's own size-limited linear storage of handles. Still there
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* might be not enough space left for new handles, dynamically allocated
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* `jerryx_handle_t` could ease the pre-allocated linear memory burden.
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*/
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struct jerryx_handle_t
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{
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jerry_value_t jval; /**< jerry value of the handle bound to */
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jerryx_handle_t *sibling; /**< next sibling the the handle */
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};
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#define JERRYX_HANDLE_SCOPE_FIELDS \
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jerry_value_t handle_prelist[JERRYX_HANDLE_PRELIST_SIZE]; \
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uint8_t prelist_handle_count; \
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bool escaped; \
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jerryx_handle_t *handle_ptr
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typedef struct jerryx_handle_scope_s jerryx_handle_scope_t;
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typedef jerryx_handle_scope_t *jerryx_handle_scope;
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typedef jerryx_handle_scope_t *jerryx_escapable_handle_scope;
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/**
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* Inlined simple handle scope type.
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*/
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struct jerryx_handle_scope_s
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{
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JERRYX_HANDLE_SCOPE_FIELDS; /**< common handle scope fields */
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};
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typedef struct jerryx_handle_scope_dynamic_s jerryx_handle_scope_dynamic_t;
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/**
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* Dynamically allocated handle scope type.
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*/
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struct jerryx_handle_scope_dynamic_s
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{
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JERRYX_HANDLE_SCOPE_FIELDS; /**< common handle scope fields */
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jerryx_handle_scope_dynamic_t *child; /**< child dynamically allocated handle scope */
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jerryx_handle_scope_dynamic_t *parent; /**< parent dynamically allocated handle scope */
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};
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#undef JERRYX_HANDLE_SCOPE_FIELDS
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typedef enum
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{
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jerryx_handle_scope_ok = 0,
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jerryx_escape_called_twice,
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jerryx_handle_scope_mismatch,
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} jerryx_handle_scope_status;
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jerryx_handle_scope_status
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jerryx_open_handle_scope (jerryx_handle_scope *result);
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jerryx_handle_scope_status
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jerryx_close_handle_scope (jerryx_handle_scope scope);
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jerryx_handle_scope_status
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jerryx_open_escapable_handle_scope (jerryx_handle_scope *result);
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jerryx_handle_scope_status
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jerryx_close_escapable_handle_scope (jerryx_handle_scope scope);
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jerryx_handle_scope_status
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jerryx_escape_handle (jerryx_escapable_handle_scope scope,
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jerry_value_t escapee,
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jerry_value_t *result);
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/**
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* Completely escape a handle from handle scope,
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* leave life time management totally up to user.
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*/
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jerryx_handle_scope_status
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jerryx_remove_handle (jerryx_escapable_handle_scope scope,
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jerry_value_t escapee,
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jerry_value_t *result);
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jerry_value_t
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jerryx_create_handle (jerry_value_t jval);
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jerry_value_t
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jerryx_create_handle_in_scope (jerry_value_t jval, jerryx_handle_scope scope);
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/** MARK: - handle-scope-allocator.c */
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jerryx_handle_scope_t *
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jerryx_handle_scope_get_current (void);
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jerryx_handle_scope_t *
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jerryx_handle_scope_get_root (void);
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/** MARK: - END handle-scope-allocator.c */
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* !JERRYX_HANDLE_SCOPE_H */
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