mirror of
https://github.com/openharmony/startup_init_lite.git
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sun_fan
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/*
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* Copyright (c) 2020 Huawei Device Co., Ltd.
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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 BASE_STARTUP_SYS_PARAM_H
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#define BASE_STARTUP_SYS_PARAM_H
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#include <pthread.h>
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#include <stdio.h>
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#include <sys/types.h>
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#ifdef __cplusplus
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#if __cplusplus
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extern "C" {
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#endif
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#endif
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#define PARAM_VALUE_LEN_MAX 96
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#define PARAM_NAME_LEN_MAX 96
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typedef u_int32_t ParamHandle;
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typedef struct {
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u_int32_t serial;
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ParamHandle handle;
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char value[PARAM_VALUE_LEN_MAX];
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} ParamCacheNode;
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typedef const char *(*ParamEvaluatePtr)(u_int32_t cacheCount, ParamCacheNode *node);
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typedef struct {
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pthread_mutex_t lock;
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u_int32_t serial;
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u_int32_t cacheCount;
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ParamEvaluatePtr evaluate;
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ParamCacheNode *cacheNode;
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} ParamCache;
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/**
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* 对外接口
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* 设置参数，主要用于其他进程使用，通过管道修改参数。
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*
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*/
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int SystemSetParameter(const char *name, const char *value);
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/**
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* 对外接口
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* 查询参数，主要用于其他进程使用，需要给定足够的内存保存参数。
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* 如果 value == null，获取value的长度
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* 否则value的大小认为是len
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*
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*/
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int SystemGetParameter(const char *name, char *value, unsigned int *len);
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/**
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* 外部接口
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* 遍历参数。
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*
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*/
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int SystemTraversalParameter(void (*traversalParameter)(ParamHandle handle, void* cookie), void* cookie);
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/**
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* 外部接口
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* 查询参数，主要用于其他进程使用，需要给定足够的内存保存参数。
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* 如果 value == null，获取value的长度
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* 否则value的大小认为是len
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*
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*/
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int SystemGetParameterName(ParamHandle handle, char *name, unsigned int len);
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/**
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* 外部接口
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* 获取参数值。
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*
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*/
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int SystemGetParameterValue(ParamHandle handle, char *value, unsigned int *len);
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#ifdef __cplusplus
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#if __cplusplus
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}
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#endif
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#endif
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#endif |