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       1           1 : /*
       2             :  * Copyright (c) 2022 Meta
       3             :  *
       4             :  * SPDX-License-Identifier: Apache-2.0
       5             :  */
       6             : 
       7             : /**
       8             :  * @file
       9             :  * @ingroup hashmap_implementations
      10             :  * @brief C++ Hashmap
      11             :  *
      12             :  * This is a C wrapper around `std::unordered_map`. It is mainly used for
      13             :  * benchmarking purposes.
      14             :  *
      15             :  * @note Enable with @kconfig{CONFIG_SYS_HASH_MAP_CXX}
      16             :  */
      17             : 
      18             : #ifndef ZEPHYR_INCLUDE_SYS_HASH_MAP_CXX_H_
      19             : #define ZEPHYR_INCLUDE_SYS_HASH_MAP_CXX_H_
      20             : 
      21             : #include <stddef.h>
      22             : 
      23             : #include <zephyr/sys/hash_function.h>
      24             : #include <zephyr/sys/hash_map_api.h>
      25             : 
      26             : #ifdef __cplusplus
      27             : extern "C" {
      28             : #endif
      29             : 
      30             : /**
      31             :  * @brief Declare a C++ Hashmap (advanced)
      32             :  *
      33             :  * Declare a C++ Hashmap with control over advanced parameters.
      34             :  *
      35             :  * @note The allocator @p _alloc is used for allocating internal Hashmap
      36             :  * entries and does not interact with any user-provided keys or values.
      37             :  *
      38             :  * @param _name Name of the Hashmap.
      39             :  * @param _hash_func Hash function pointer of type @ref sys_hash_func32_t.
      40             :  * @param _alloc_func Allocator function pointer of type @ref sys_hashmap_allocator_t.
      41             :  * @param ... Variant-specific details for @ref sys_hashmap_config.
      42             :  */
      43           1 : #define SYS_HASHMAP_CXX_DEFINE_ADVANCED(_name, _hash_func, _alloc_func, ...)                       \
      44             :         SYS_HASHMAP_DEFINE_ADVANCED(_name, &sys_hashmap_cxx_api, sys_hashmap_config,               \
      45             :                                     sys_hashmap_data, _hash_func, _alloc_func, __VA_ARGS__)
      46             : 
      47             : /**
      48             :  * @brief Declare a C++ Hashmap (advanced)
      49             :  *
      50             :  * Declare a C++ Hashmap with control over advanced parameters.
      51             :  *
      52             :  * @note The allocator @p _alloc is used for allocating internal Hashmap
      53             :  * entries and does not interact with any user-provided keys or values.
      54             :  *
      55             :  * @param _name Name of the Hashmap.
      56             :  * @param _hash_func Hash function pointer of type @ref sys_hash_func32_t.
      57             :  * @param _alloc_func Allocator function pointer of type @ref sys_hashmap_allocator_t.
      58             :  * @param ... Details for @ref sys_hashmap_config.
      59             :  */
      60           1 : #define SYS_HASHMAP_CXX_DEFINE_STATIC_ADVANCED(_name, _hash_func, _alloc_func, ...)                \
      61             :         SYS_HASHMAP_DEFINE_STATIC_ADVANCED(_name, &sys_hashmap_cxx_api, sys_hashmap_config,        \
      62             :                                            sys_hashmap_data, _hash_func, _alloc_func, __VA_ARGS__)
      63             : 
      64             : /**
      65             :  * @brief Declare a C++ Hashmap statically
      66             :  *
      67             :  * Declare a C++ Hashmap statically with default parameters.
      68             :  *
      69             :  * @param _name Name of the Hashmap.
      70             :  */
      71           1 : #define SYS_HASHMAP_CXX_DEFINE_STATIC(_name)                                                       \
      72             :         SYS_HASHMAP_CXX_DEFINE_STATIC_ADVANCED(                                                    \
      73             :                 _name, sys_hash32, SYS_HASHMAP_DEFAULT_ALLOCATOR,                                  \
      74             :                 SYS_HASHMAP_CONFIG(SIZE_MAX, SYS_HASHMAP_DEFAULT_LOAD_FACTOR))
      75             : 
      76             : /**
      77             :  * @brief Declare a C++ Hashmap
      78             :  *
      79             :  * Declare a C++ Hashmap with default parameters.
      80             :  *
      81             :  * @param _name Name of the Hashmap.
      82             :  */
      83           1 : #define SYS_HASHMAP_CXX_DEFINE(_name)                                                              \
      84             :         SYS_HASHMAP_CXX_DEFINE_ADVANCED(                                                           \
      85             :                 _name, sys_hash32, SYS_HASHMAP_DEFAULT_ALLOCATOR,                                  \
      86             :                 SYS_HASHMAP_CONFIG(SIZE_MAX, SYS_HASHMAP_DEFAULT_LOAD_FACTOR))
      87             : 
      88             : #ifdef CONFIG_SYS_HASH_MAP_CHOICE_CXX
      89             : #define SYS_HASHMAP_DEFAULT_DEFINE(_name)        SYS_HASHMAP_CXX_DEFINE(_name)
      90             : #define SYS_HASHMAP_DEFAULT_DEFINE_STATIC(_name) SYS_HASHMAP_CXX_DEFINE_STATIC(_name)
      91             : #define SYS_HASHMAP_DEFAULT_DEFINE_ADVANCED(_name, _hash_func, _alloc_func, ...)                   \
      92             :         SYS_HASHMAP_CXX_DEFINE_ADVANCED(_name, _hash_func, _alloc_func, __VA_ARGS__)
      93             : #define SYS_HASHMAP_DEFAULT_DEFINE_STATIC_ADVANCED(_name, _hash_func, _alloc_func, ...)            \
      94             :         SYS_HASHMAP_CXX_DEFINE_STATIC_ADVANCED(_name, _hash_func, _alloc_func, __VA_ARGS__)
      95             : #endif
      96             : 
      97           0 : extern const struct sys_hashmap_api sys_hashmap_cxx_api;
      98             : 
      99             : #ifdef __cplusplus
     100             : }
     101             : #endif
     102             : 
     103             : #endif /* ZEPHYR_INCLUDE_SYS_HASH_MAP_CXX_H_ */