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| constexpr uint  | ONCE_ALLOC_INIT = 4096 - MALLOC_OVERHEAD | 
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| PSI_memory_key  | key_memory_charset_file | 
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| PSI_memory_key  | key_memory_charset_loader | 
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| PSI_memory_key  | key_memory_lf_node | 
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| PSI_memory_key  | key_memory_lf_dynarray | 
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| PSI_memory_key  | key_memory_lf_slist | 
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| PSI_memory_key  | key_memory_LIST | 
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| PSI_memory_key  | key_memory_IO_CACHE | 
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| PSI_memory_key  | key_memory_KEY_CACHE | 
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| PSI_memory_key  | key_memory_SAFE_HASH_ENTRY | 
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| PSI_memory_key  | key_memory_MY_BITMAP_bitmap | 
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| PSI_memory_key  | key_memory_my_compress_alloc | 
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| PSI_memory_key  | key_memory_my_err_head | 
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| PSI_memory_key  | key_memory_my_file_info | 
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| PSI_memory_key  | key_memory_max_alloca | 
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| PSI_memory_key  | key_memory_MY_DIR | 
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| PSI_memory_key  | key_memory_MY_TMPDIR_full_list | 
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| PSI_memory_key  | key_memory_DYNAMIC_STRING | 
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| PSI_memory_key  | key_memory_TREE | 
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| PSI_thread_key  | key_thread_timer_notifier | 
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| char *  | home_dir = nullptr | 
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| const char *  | my_progname = nullptr | 
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| char  | curr_dir [FN_REFLEN] = {0} | 
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| char  | home_dir_buff [FN_REFLEN] = {0} | 
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| ulong  | my_tmp_file_created = 0 | 
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| ulong  | my_stream_opened = 0 | 
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| ulong  | my_file_opened = 0 | 
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| ulong  | my_file_total_opened = 0 | 
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| int  | my_umask = 0664 | 
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| int  | my_umask_dir = 0777 | 
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| ulong  | my_default_record_cache_size = RECORD_CACHE_SIZE | 
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| USED_MEM *  | my_once_root_block = nullptr | 
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| uint  | my_once_extra = ONCE_ALLOC_INIT | 
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| std::atomic< ErrorHandlerFunctionPointer >  | error_handler_hook {my_message_stderr} | 
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| void(*  | local_message_hook )(enum loglevel ll, uint ecode, va_list args) = my_message_local_stderr | 
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| void(*  | enter_cond_hook )(void *, mysql_cond_t *, mysql_mutex_t *, const PSI_stage_info *, PSI_stage_info *, const char *, const char *, int) = enter_cond_dummy | 
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| void(*  | exit_cond_hook )(void *, const PSI_stage_info *, const char *, const char *, int) = exit_cond_dummy | 
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| void(*  | enter_stage_hook )(void *, const PSI_stage_info *, PSI_stage_info *, const char *, const char *, int) = enter_stage_dummy | 
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| void(*  | set_waiting_for_disk_space_hook )(void *, bool) | 
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| int(*  | is_killed_hook )(const void *) = is_killed_dummy | 
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| bool  | my_disable_locking = false | 
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| bool  | my_enable_symlinks = false | 
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Static variables for mysys library. 
All defined here for easy making of a shared library.