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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd.
*
* Licensed under the Flora License, Version 1.1 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://floralicense.org/license/
*
* 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 __PROC_SCANNER_H
#define __PROC_SCANNER_H
#include <stdbool.h>
#include "process.h"
/**
* @brief Scanner object
*/
typedef struct proc_scanner proc_scanner_t;
/**
* @brief Iterator callback
*
* @param[in]: proc the proccess structure
* @param[in]: data passed to @proc_scanner_foreach_process
*
* @return: true to continue iterating, false otherwise.
*/
typedef bool (*foreach_t)(struct process *proc, void *data);
/**
* @brief Sort callback
*
* @param[in]: proc the process
* @param[in]: proc the process
*
* @return value < 0 if @proc1 goes before @proc2, value > 0 othersize, 0 if
* equal
*/
typedef int (*sort_t)(struct process *proc1, struct process *proc2);
/**
* @brief Creates new proc_scanner object
*
* @return scanner object poiter or NULL in case of error
*
* @note the scanner should be released with @proc_scanner_free
*/
proc_scanner_t *proc_scanner_new();
/**
* @brief Releases resources allocated for scanner_object
*
* @param[in] scanner
*/
void proc_scanner_free(proc_scanner_t *scanner);
/**
* @brief Performs scan of processes scanners contained in /proc/ scannerectory
*
* @param[in] scanner
*
* @return 0 on success, other value on failure.
*/
int proc_scanner_scan(proc_scanner_t *scanner);
/**
* @brief Performs scan of processes scanners contained in /proc/ scannerectory
*
* @param[in] scanner
*
* @return 0 on success, other value on failure.
*/
int proc_scanner_scan_pids(proc_scanner_t *scanner, int *pids, int n_pids);
/**
* @brief Iterate over processes scanned by @proc_scanner_scan_pids or
* @proc_scanner_scan methods.
*
* @param[in] scanner
* @param[in] cb iterator callback
* @param[in] data user data passed to callback @cb
*
* @return 0 on success, other value on failure.
*/
int proc_scanner_foreach_process(proc_scanner_t *scanner, foreach_t cb, void *data);
/**
* @brief Sort processes scanned by @proc_scanner_scan_pids or
* @proc_scanner_scan methods. The sorting will affect process iteration
* with @proc_scanner_foreach_process.
*
* @param[in] scanner
* @param[in] cb sort callback
*
* @return 0 on success, other value on failure.
*/
int proc_scanner_sort_processes(proc_scanner_t *scanner, sort_t cb);
#endif
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