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