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89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/*
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* Copyright (c) 2006-2025 RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2023-11-01 Shell Init ver.
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*/
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#include "lwp_futex_internal.h"
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static struct shared_futex_entry *_futex_hash_head;
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/**
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* @brief Add a futex to the global hash table
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*
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* @param[in] key Pointer to the shared futex key structure
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* @param[in] futex The futex to be added to the table
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*
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* @return rt_err_t Returns RT_EOK on success, error code on failure
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*/
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rt_err_t futex_global_table_add(struct shared_futex_key *key, rt_futex_t futex)
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{
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rt_err_t rc = 0;
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struct shared_futex_entry *entry = &futex->entry;
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futex->entry.key.mobj = key->mobj;
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futex->entry.key.offset = key->offset;
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RT_UTHASH_ADD(_futex_hash_head, key, sizeof(struct shared_futex_key), entry);
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return rc;
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}
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/**
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* @brief Find a futex in the global hash table
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*
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* @param[in] key Pointer to the shared futex key structure
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* @param[out] futex Pointer to store the found futex
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*
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* @return rt_err_t Returns RT_EOK if found, -RT_ENOENT if not found
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*/
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rt_err_t futex_global_table_find(struct shared_futex_key *key, rt_futex_t *futex)
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{
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rt_err_t rc;
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rt_futex_t found_futex;
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struct shared_futex_entry *entry;
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RT_UTHASH_FIND(_futex_hash_head, key, sizeof(struct shared_futex_key), entry);
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if (entry)
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{
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rc = RT_EOK;
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found_futex = rt_container_of(entry, struct rt_futex, entry);
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}
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else
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{
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rc = -RT_ENOENT;
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found_futex = RT_NULL;
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}
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*futex = found_futex;
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return rc;
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}
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/**
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* @brief Delete a futex from the global hash table
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*
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* @param[in] key Pointer to the shared futex key structure
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*
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* @return rt_err_t Returns RT_EOK if deleted successfully, -RT_ENOENT if not found
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*/
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rt_err_t futex_global_table_delete(struct shared_futex_key *key)
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{
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rt_err_t rc;
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struct shared_futex_entry *entry;
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RT_UTHASH_FIND(_futex_hash_head, key, sizeof(struct shared_futex_key), entry);
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if (entry)
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{
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RT_UTHASH_DELETE(_futex_hash_head, entry);
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rc = RT_EOK;
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}
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else
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{
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rc = -RT_ENOENT;
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}
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return rc;
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}
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