my_sys.h File Reference

Common header for many mysys elements. More...

#include "my_config.h"
#include <alloca.h>
#include <limits.h>
#include <unistd.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/select.h>
#include <sys/types.h>
#include <time.h>
#include <atomic>
#include <cstring>
#include "my_compiler.h"
#include "my_compress.h"
#include "my_inttypes.h"
#include "mysql/my_loglevel.h"
#include "my_psi_config.h"
#include "my_sharedlib.h"
#include "mysql/components/services/bits/my_io_bits.h"
#include "mysql/components/services/bits/mysql_cond_bits.h"
#include "mysql/components/services/bits/mysql_mutex_bits.h"
#include "mysql/components/services/bits/psi_bits.h"
#include "mysql/components/services/bits/psi_file_bits.h"
#include "mysql/components/services/bits/psi_memory_bits.h"
#include "mysql/components/services/bits/psi_metric_bits.h"
#include "mysql/components/services/bits/psi_stage_bits.h"
#include "sql/stream_cipher.h"
#include "string_with_len.h"
#include <sys/mman.h>

Go to the source code of this file.

Classes
struct	DYNAMIC_ARRAY
struct	MY_TMPDIR
struct	DYNAMIC_STRING
struct	IO_CACHE_SHARE
struct	IO_CACHE
struct	ST_FILE_ID
struct	USED_MEM
	struct for once_alloc (block) More...

Macros
#define	MY_INIT(name)
#define	MYSYS_ERRMSG_SIZE   (512)
	Max length of an error message generated by mysys utilities. More...
#define	MYSYS_STRERROR_SIZE   (128)
#define	MY_FILE_ERROR   ((size_t)-1)
#define	MY_FNABP   2 /* Fatal if not all bytes read/written */
#define	MY_NABP   4 /* Error if not all bytes read/written */
#define	MY_FAE   8 /* Fatal if any error */
#define	MY_WME   16 /* Write message on error */
#define	MY_WAIT_IF_FULL   32 /* Wait and try again if disk full error */
#define	MY_IGNORE_BADFD   32 /* my_sync: ignore 'bad descriptor' errors */
#define	MY_REPORT_WAITING_IF_FULL   64 /* my_write: set status as waiting */
#define	MY_FULL_IO   512 /* For my_read - loop intil I/O is complete */
#define	MY_DONT_CHECK_FILESIZE   128 /* Option to init_io_cache() */
#define	MY_LINK_WARNING   32 /* my_redel() gives warning if links */
#define	MY_COPYTIME   64 /* my_redel() copies time */
#define	MY_DELETE_OLD   256 /* my_create_with_symlink() */
#define	MY_RESOLVE_LINK   128 /* my_realpath(); Only resolve links */
#define	MY_HOLD_ORIGINAL_MODES   128 /* my_copy() holds to file modes */
#define	MY_SEEK_NOT_DONE   32 /* my_lock may have to do a seek */
#define	MY_DONT_WAIT   64 /* my_lock() don't wait if can't lock */
#define	MY_ZEROFILL   32 /* my_malloc(), fill array with zero */
#define	MY_ALLOW_ZERO_PTR   64 /* my_realloc() ; zero ptr -> malloc */
#define	MY_FREE_ON_ERROR   128 /* my_realloc() ; Free old ptr on error */
#define	MY_HOLD_ON_ERROR   256 /* my_realloc() ; Return old ptr on error */
#define	MY_DONT_OVERWRITE_FILE   1024 /* my_copy: Don't overwrite file */
#define	MY_SYNC   4096 /* my_copy(): sync dst file */
#define	MYF_RW   MYF(MY_WME + MY_NABP) /* For my_read & my_write */
#define	MY_CHECK_ERROR   1 /* Params to my_end; Check open-close */
#define	MY_GIVE_INFO   2 /* Give time info about process*/
#define	MY_DONT_FREE_DBUG   4 /* Do not call DBUG_END() in my_end() */
#define	ME_BELL   4 /* DEPRECATED: Ring bell then printing message */
#define	ME_ERRORLOG   64 /* Write the error message to error log */
#define	ME_FATALERROR   1024 /* Fatal statement error */
#define	MY_REPLACE_DIR   1 /* replace dir in name with 'dir' */
#define	MY_REPLACE_EXT   2 /* replace extension with 'ext' */
#define	MY_UNPACK_FILENAME   4 /* Unpack name (~ -> home) */
#define	MY_RESOLVE_SYMLINKS   16 /* Resolve all symbolic links */
#define	MY_RETURN_REAL_PATH   32 /* return full path for file */
#define	MY_SAFE_PATH   64 /* Return NULL if too long path */
#define	MY_RELATIVE_PATH   128 /* name is relative to 'dir' */
#define	MY_APPEND_EXT   256 /* add 'ext' as additional extension*/
#define	MY_SEEK_SET   0
#define	MY_SEEK_CUR   1
#define	MY_SEEK_END   2
#define	MY_WAIT_FOR_USER_TO_FIX_PANIC   60 /* in seconds */
#define	MY_WAIT_GIVE_USER_A_MESSAGE   10 /* Every 10 times of prev */
#define	MIN_COMPRESS_LENGTH   50 /* Don't compress small bl. */
#define	DFLT_INIT_HITS   3
#define	MY_ERRNO_EDOM   33
#define	MY_ERRNO_ERANGE   34
#define	my_safe_alloca(size, max_alloca_sz)
#define	my_safe_afree(ptr, size, max_alloca_sz)    if (size > max_alloca_sz) my_free(ptr)
#define	DEBUG_SYNC_C(_sync_point_name_)
#define	DEBUG_SYNC_C_IF_THD(thd, _sync_point_name_)
#define	my_alloca(SZ)   alloca((size_t)(SZ))
#define	MY_ALL_CHARSETS_SIZE   2048
#define	MALLOC_OVERHEAD   8
#define	RECORD_CACHE_SIZE   (uint)(64 * 1024 - MALLOC_OVERHEAD)
#define	MAX_SYSLOG_MESSAGE_SIZE   1024
#define	my_access   access
#define	is_filename_allowed(name, length, allow_cwd)   (true)
#define	my_delete_allow_opened(fname, flags)   my_delete((fname), (flags))
#define	base_name(A)   (A + dirname_length(A))
#define	flush_io_cache(info)   my_b_flush_io_cache((info), 1)
#define	dynamic_element(array, array_index, type)    ((type)((array)->buffer) + (array_index))
#define	alloc_root_inited(A)   ((A)->inited())
#define	MAP_NOSYNC   0
#define	MAP_NORESERVE   0
#define	my_mmap(a, b, c, d, e, f)   mmap64(a, b, c, d, e, f)
#define	my_munmap(a, b)   munmap((a), (b))

Typedefs
using	ErrorHandlerFunctionPointer = void(*)(uint, const char *, myf)
typedef int(*	IO_CACHE_CALLBACK) (IO_CACHE *)
typedef int(*	qsort2_cmp) (const void *, const void *, const void *)
typedef void(*	my_error_reporter) (enum loglevel level, uint ecode,...)
typedef void(*	my_error_vreporter) (enum loglevel level, uint ecode, va_list)

Enumerations
enum	cache_type {   TYPE_NOT_SET = 0 , READ_CACHE , WRITE_CACHE , SEQ_READ_APPEND ,   READ_FIFO , READ_NET , WRITE_NET }
enum	flush_type { FLUSH_KEEP , FLUSH_RELEASE , FLUSH_IGNORE_CHANGED , FLUSH_FORCE_WRITE }
enum	my_syslog_options { MY_SYSLOG_PIDS = 1 }
enum	UnlinkOrKeepFile { UNLINK_FILE , KEEP_FILE }

Functions
void *	my_multi_malloc (PSI_memory_key key, myf flags,...)
uint	my_get_large_page_size (void)
void	my_b_clear (IO_CACHE *info)
bool	my_b_inited (const IO_CACHE *info)
int	my_b_read (IO_CACHE *info, uchar *buffer, size_t count)
int	my_b_write (IO_CACHE *info, const uchar *buffer, size_t count)
int	_my_b_get (IO_CACHE *info)
int	my_b_get (IO_CACHE *info)
my_off_t	my_b_tell (const IO_CACHE *info)
uchar *	my_b_get_buffer_start (const IO_CACHE *info)
size_t	my_b_get_bytes_in_buffer (const IO_CACHE *info)
my_off_t	my_b_get_pos_in_file (const IO_CACHE *info)
int	my_b_copy_to_file (IO_CACHE *cache, FILE *file)
size_t	my_b_bytes_in_cache (const IO_CACHE *info)
int	my_copy (const char *from, const char *to, myf MyFlags)
int	my_delete (const char *name, myf MyFlags)
int	my_getwd (char *buf, size_t size, myf MyFlags)
int	my_setwd (const char *dir, myf MyFlags)
void *	my_once_alloc (size_t Size, myf MyFlags)
void	my_once_free (void)
char *	my_once_strdup (const char *src, myf myflags)
void *	my_once_memdup (const void *src, size_t len, myf myflags)
File	my_open (const char *filename, int Flags, myf MyFlags)
	Open a file. More...
File	my_create (const char *FileName, int CreateFlags, int AccessFlags, myf MyFlags)
	Create a new file. More...
int	my_close (File fd, myf MyFlags)
	Close a file. More...
int	my_mkdir (const char *dir, int Flags, myf MyFlags)
int	my_readlink (char *to, const char *filename, myf MyFlags)
int	my_is_symlink (const char *filename, ST_FILE_ID *file_id)
int	my_realpath (char *to, const char *filename, myf MyFlags)
int	my_is_same_file (File file, const ST_FILE_ID *file_id)
	Return non-zero if the file descriptor and a previously lstat-ed file identified by file_id point to the same file. More...
File	my_create_with_symlink (const char *linkname, const char *filename, int createflags, int access_flags, myf MyFlags)
int	my_delete_with_symlink (const char *name, myf MyFlags)
int	my_rename_with_symlink (const char *from, const char *to, myf MyFlags)
int	my_symlink (const char *content, const char *linkname, myf MyFlags)
size_t	my_read (File Filedes, uchar *Buffer, size_t Count, myf MyFlags)
	Read a chunk of bytes from a file with retry's if needed If flag MY_FULL_IO is set then keep reading until EOF is found. More...
size_t	my_pread (File Filedes, uchar *Buffer, size_t Count, my_off_t offset, myf MyFlags)
	Read a chunk of bytes from a file from a given position. More...
int	my_rename (const char *from, const char *to, myf MyFlags)
my_off_t	my_seek (File fd, my_off_t pos, int whence, myf MyFlags)
	Seek to a position in a file. More...
my_off_t	my_tell (File fd, myf MyFlags)
size_t	my_write (File Filedes, const uchar *Buffer, size_t Count, myf MyFlags)
	Write a chunk of bytes to a file. More...
size_t	my_pwrite (File Filedes, const uchar *Buffer, size_t Count, my_off_t offset, myf MyFlags)
	Write a chunk of bytes to a file at a given position. More...
size_t	my_fread (FILE *stream, uchar *Buffer, size_t Count, myf MyFlags)
	Read a chunk of bytes from a FILE stream. More...
size_t	my_fwrite (FILE *stream, const uchar *Buffer, size_t Count, myf MyFlags)
	Write a chunk of bytes to a FILE stream. More...
my_off_t	my_fseek (FILE *stream, my_off_t pos, int whence)
	Seek to position in FILE stream. More...
my_off_t	my_ftell (FILE *stream)
	Portable ftell() wrapper. More...
int	my_openlog (const char *eventSourceName, int option, int facility)
	Opens/Registers a new handle for system logging. More...
int	my_closelog ()
	Closes/de-registers the system logging handle. More...
int	my_syslog (const CHARSET_INFO *cs, enum loglevel level, const char *msg)
	Sends message to the system logger. More...
int	check_if_legal_filename (const char *path)
int	check_if_legal_tablename (const char *path)
const char *	get_global_errmsg (int nr)
void	wait_for_free_space (const char *filename, int errors)
FILE *	my_fopen (const char *filename, int Flags, myf MyFlags)
	Open a file as stream. More...
FILE *	my_fdopen (File fd, const char *filename, int Flags, myf MyFlags)
	Make a stream out of a file handle. More...
FILE *	my_freopen (const char *filename, const char *mode, FILE *stream)
	Change the file associated with a file stream. More...
int	my_fclose (FILE *stream, myf MyFlags)
	Close a stream. More...
File	my_fileno (FILE *stream)
	Portable fileno() wrapper. More...
int	my_chsize (File fd, my_off_t newlength, int filler, myf MyFlags)
	Change size of file. More...
int	my_fallocator (File fd, my_off_t newlength, int filler, myf MyFlags)
	Change size of the specified file. More...
void	thr_set_sync_wait_callback (void(*before_sync)(void), void(*after_sync)(void))
int	my_sync (File fd, myf my_flags)
char *	my_strerror (char *buf, size_t len, int errnum)
	Get a string describing a system or handler error. More...
const char *	my_get_err_msg (int nr)
	Get an error format string from one of the my_error_register()ed sets. More...
void	my_error (int nr, myf MyFlags,...)
	Fill in and print a previously registered error message. More...
void	my_printf_error (uint my_err, const char *format, myf MyFlags,...)
	Print an error message. More...
void	my_printv_error (uint error, const char *format, myf MyFlags, va_list ap)
	Print an error message. More...
int	my_error_register (const char *(*get_errmsg)(int), int first, int last)
	Register error messages for use with my_error(). More...
bool	my_error_unregister (int first, int last)
	Unregister formerly registered error messages. More...
void	my_message (uint my_err, const char *str, myf MyFlags)
	Print an error message. More...
void	my_message_stderr (uint my_err, const char *str, myf MyFlags)
	Print an error message on stderr. More...
void	my_message_local_stderr (enum loglevel, uint ecode, va_list args)
	Issue a message locally (i.e. More...
void	my_message_local (enum loglevel ll, uint ecode,...)
	Issue a message locally (i.e. More...
template<class... Ts>
void	MyOsError (int errno_val, Ts... ppck)
	Convenience wrapper for OS error messages which report errno/my_errno with d followed by strerror as s, as the last conversions in the error message. More...
bool	my_init (void)
	Initialize my_sys functions, resources and variables. More...
void	my_end (int infoflag)
const char *	my_filename (File fd)
	Get filename of file. More...
MY_MODE	get_file_perm (ulong perm_flags)
bool	my_chmod (const char *filename, ulong perm_flags, myf my_flags)
bool	init_tmpdir (MY_TMPDIR *tmpdir, const char *pathlist)
char *	my_tmpdir (MY_TMPDIR *tmpdir)
void	free_tmpdir (MY_TMPDIR *tmpdir)
size_t	dirname_part (char *to, const char *name, size_t *to_res_length)
	Gives directory part of filename. More...
size_t	dirname_length (const char *name)
	Get the string length of the directory part of name, including the last FN_LIBCHAR. More...
int	test_if_hard_path (const char *dir_name)
bool	has_path (const char *name)
char *	convert_dirname (char *to, const char *from, const char *from_end)
	Convert directory name to use under this system. More...
void	to_unix_path (char *name)
	Convert filename to unix style filename. More...
char *	fn_ext (char *name)
const char *	fn_ext (const char *name)
char *	fn_same (char *toname, const char *name, int flag)
char *	fn_format (char *to, const char *name, const char *dir, const char *form, uint flag)
	Formats a filename with possible replace of directory of extension Function can handle the case where 'to' == 'name' For a description of the flag values, consult my_sys.h The arguments should be in unix format. More...
size_t	strlength (const char *str)
	Calculate the length of str not including any trailing ' '-bytes. More...
size_t	normalize_dirname (char *to, const char *from)
	Convert a directory name to a format which can be compared as strings. More...
size_t	unpack_dirname (char *to, const char *from)
	Fixes a directory name so that can be used by open(). More...
size_t	cleanup_dirname (char *to, const char *from)
	Remove unwanted chars from dirname. More...
size_t	system_filename (char *to, const char *from)
	Convert filename (unix standard) to system standard Used before system command's like open(), create() More...
size_t	unpack_filename (char *to, const char *from)
	Fix filename so it can be used by open, create. More...
char *	intern_filename (char *to, const char *from)
	Fix a filename to intern (UNIX format). More...
char *	my_path (char *to, const char *progname, const char *own_pathname_part)
char *	my_load_path (char *to, const char *path, const char *own_path_prefix)
	Returns full load-path for a file. More...
bool	array_append_string_unique (const char *str, const char **array, size_t size)
	Append str to array, or move to the end if it already exists. More...
void	my_store_ptr (uchar *buff, size_t pack_length, my_off_t pos)
my_off_t	my_get_ptr (uchar *ptr, size_t pack_length)
int	init_io_cache_ext (IO_CACHE *info, File file, size_t cachesize, enum cache_type type, my_off_t seek_offset, bool use_async_io, myf cache_myflags, PSI_file_key file_key)
int	init_io_cache (IO_CACHE *info, File file, size_t cachesize, enum cache_type type, my_off_t seek_offset, bool use_async_io, myf cache_myflags)
bool	reinit_io_cache (IO_CACHE *info, enum cache_type type, my_off_t seek_offset, bool use_async_io, bool clear_cache)
void	setup_io_cache (IO_CACHE *info)
int	_my_b_read (IO_CACHE *info, uchar *Buffer, size_t Count)
int	_my_b_read_r (IO_CACHE *info, uchar *Buffer, size_t Count)
void	init_io_cache_share (IO_CACHE *read_cache, IO_CACHE_SHARE *cshare, IO_CACHE *write_cache, uint num_threads)
void	remove_io_thread (IO_CACHE *info)
int	_my_b_seq_read (IO_CACHE *info, uchar *Buffer, size_t Count)
int	_my_b_net_read (IO_CACHE *info, uchar *Buffer, size_t Count)
	Read buffered from the net. More...
int	_my_b_write (IO_CACHE *info, const uchar *Buffer, size_t Count)
int	my_b_append (IO_CACHE *info, const uchar *Buffer, size_t Count)
int	my_b_safe_write (IO_CACHE *info, const uchar *Buffer, size_t Count)
int	my_block_write (IO_CACHE *info, const uchar *Buffer, size_t Count, my_off_t pos)
int	my_b_flush_io_cache (IO_CACHE *info, int need_append_buffer_lock)
int	end_io_cache (IO_CACHE *info)
size_t	my_b_fill (IO_CACHE *info)
void	my_b_seek (IO_CACHE *info, my_off_t pos)
size_t	my_b_gets (IO_CACHE *info, char *to, size_t max_length)
my_off_t	my_b_filelength (IO_CACHE *info)
size_t	my_b_printf (IO_CACHE *info, const char *fmt,...)
	Simple printf version. More...
size_t	my_b_vprintf (IO_CACHE *info, const char *fmt, va_list ap)
	Implementation of my_b_printf. More...
bool	open_cached_file (IO_CACHE *cache, const char *dir, const char *prefix, size_t cache_size, myf cache_myflags)
bool	real_open_cached_file (IO_CACHE *cache)
void	close_cached_file (IO_CACHE *cache)
File	create_temp_file (char *to, const char *dir, const char *pfx, int mode, UnlinkOrKeepFile unlink_or_keep, myf MyFlags)
bool	my_init_dynamic_array (DYNAMIC_ARRAY *array, PSI_memory_key key, uint element_size, void *init_buffer, uint init_alloc, uint alloc_increment)
bool	insert_dynamic (DYNAMIC_ARRAY *array, const void *element)
void *	alloc_dynamic (DYNAMIC_ARRAY *array)
void	delete_dynamic (DYNAMIC_ARRAY *array)
bool	init_dynamic_string (DYNAMIC_STRING *str, const char *init_str, size_t init_alloc)
bool	dynstr_append (DYNAMIC_STRING *str, const char *append)
bool	dynstr_append_mem (DYNAMIC_STRING *str, const char *append, size_t length)
bool	dynstr_append_os_quoted (DYNAMIC_STRING *str, const char *append,...)
bool	dynstr_append_quoted (DYNAMIC_STRING *str, const char *quote_str, const uint quote_len, const char *append,...)
bool	dynstr_set (DYNAMIC_STRING *str, const char *init_str)
bool	dynstr_realloc (DYNAMIC_STRING *str, size_t additional_size)
bool	dynstr_trunc (DYNAMIC_STRING *str, size_t n)
void	dynstr_free (DYNAMIC_STRING *str)
void *	multi_alloc_root (MEM_ROOT *mem_root,...)
char *	strdup_root (MEM_ROOT *root, const char *str)
char *	safe_strdup_root (MEM_ROOT *root, const char *str)
char *	strmake_root (MEM_ROOT *root, const char *str, size_t len)
void *	memdup_root (MEM_ROOT *root, const void *str, size_t len)
bool	my_compress (mysql_compress_context *, uchar *, size_t *, size_t *)
	This replaces the packet with a compressed packet. More...
bool	my_uncompress (mysql_compress_context *, uchar *, size_t, size_t *)
	Uncompress packet. More...
uchar *	my_compress_alloc (mysql_compress_context *comp_ctx, const uchar *packet, size_t *len, size_t *complen)
uint	my_set_max_open_files (uint files)
	Sets the OS limit on the number of open files (if supported). More...
bool	my_gethwaddr (uchar *to)
static int	my_getpagesize ()
int	my_msync (int, void *, size_t, int)
uint	get_charset_number (const char *cs_name, uint cs_flags)
uint	get_collation_number (const char *name)
const char *	get_collation_name (uint charset_number)
CHARSET_INFO *	get_charset (uint cs_number, myf flags)
CHARSET_INFO *	get_charset_by_name (const char *cs_name, myf flags)
CHARSET_INFO *	my_collation_get_by_name (const char *collation_name, myf flags, MY_CHARSET_ERRMSG *)
	Find collation by name: extended version of get_charset_by_name() to return error messages to the caller. More...
CHARSET_INFO *	get_charset_by_csname (const char *cs_name, uint cs_flags, myf my_flags)
CHARSET_INFO *	my_charset_get_by_name (const char *name, uint cs_flags, myf my_flags, MY_CHARSET_ERRMSG *)
	Find character set by name: extended version of get_charset_by_csname() to return error messages to the caller. More...
bool	resolve_charset (const char *cs_name, const CHARSET_INFO *default_cs, const CHARSET_INFO **cs)
	Resolve character set by the character set name (utf8, latin1, ...). More...
bool	resolve_collation (const char *cl_name, const CHARSET_INFO *default_cl, const CHARSET_INFO **cl)
	Resolve collation by the collation name (utf8_general_ci, ...). More...
char *	get_charsets_dir (char *buf)
size_t	escape_string_for_mysql (const CHARSET_INFO *charset_info, char *to, size_t to_length, const char *from, size_t length)
void	charset_uninit ()
size_t	escape_quotes_for_mysql (CHARSET_INFO *charset_info, char *to, size_t to_length, const char *from, size_t length, char quote)
void	my_init_mysys_psi_keys (void)
void	set_psi_cond_service (void *psi)
void	set_psi_data_lock_service (void *psi)
void	set_psi_error_service (void *psi)
void	set_psi_file_service (void *psi)
void	set_psi_idle_service (void *psi)
void	set_psi_mdl_service (void *psi)
void	set_psi_memory_service (void *psi)
void	set_psi_metric_service (void *psi)
void	set_psi_mutex_service (void *psi)
void	set_psi_rwlock_service (void *psi)
void	set_psi_socket_service (void *psi)
void	set_psi_stage_service (void *psi)
void	set_psi_statement_service (void *psi)
void	set_psi_system_service (void *psi)
void	set_psi_table_service (void *psi)
void	set_psi_thread_service (void *psi)
void	set_psi_transaction_service (void *psi)
void	set_psi_tls_channel_service (void *psi)
unsigned long long	my_physical_memory ()
my_off_t	mysql_encryption_file_seek (IO_CACHE *cache, my_off_t pos, int whence, myf flags)
	This is a wrapper around mysql_file_seek. More...
size_t	mysql_encryption_file_read (IO_CACHE *cache, uchar *buffer, size_t count, myf flags)
	This is a wrapper around mysql_file_read. More...
size_t	mysql_encryption_file_write (IO_CACHE *cache, const uchar *buffer, size_t count, myf flags)
	This is a wrapper around mysql_file_write. More...

Variables
PSI_memory_key	key_memory_max_alloca
char *	home_dir
const char *	my_progname
std::atomic< ErrorHandlerFunctionPointer >	error_handler_hook
void(*	local_message_hook )(enum loglevel ll, uint ecode, va_list args)
MYSQL_PLUGIN_IMPORT ulong	my_thread_stack_size
void(*	enter_cond_hook )(void *opaque_thd, mysql_cond_t *cond, mysql_mutex_t *mutex, const PSI_stage_info *stage, PSI_stage_info *old_stage, const char *src_function, const char *src_file, int src_line)
void(*	exit_cond_hook )(void *opaque_thd, const PSI_stage_info *stage, const char *src_function, const char *src_file, int src_line)
void(*	enter_stage_hook )(void *opaque_thd, const PSI_stage_info *new_stage, PSI_stage_info *old_stage, const char *src_function, const char *src_file, int src_line)
void(*	set_waiting_for_disk_space_hook )(void *opaque_thd, bool waiting)
int(*	is_killed_hook )(const void *opaque_thd)
MYSQL_PLUGIN_IMPORT CHARSET_INFO *	default_charset_info
MYSQL_PLUGIN_IMPORT const CHARSET_INFO *	all_charsets [MY_ALL_CHARSETS_SIZE]
ulong	my_tmp_file_created
ulong	my_file_opened
ulong	my_stream_opened
ulong	my_file_total_opened
bool	my_init_done
MYSQL_PLUGIN_IMPORT int	my_umask
int	my_umask_dir
ulong	my_default_record_cache_size
bool	my_disable_locking
bool	my_enable_symlinks
const char *	charsets_dir
my_error_vreporter	my_charset_error_reporter
PSI_file_key	key_file_io_cache
constexpr int	my_b_EOF = INT_MIN
MYSQL_PLUGIN_IMPORT PSI_cond_bootstrap *	psi_cond_hook
MYSQL_PLUGIN_IMPORT PSI_data_lock_bootstrap *	psi_data_lock_hook
MYSQL_PLUGIN_IMPORT PSI_error_bootstrap *	psi_error_hook
MYSQL_PLUGIN_IMPORT PSI_file_bootstrap *	psi_file_hook
MYSQL_PLUGIN_IMPORT PSI_idle_bootstrap *	psi_idle_hook
MYSQL_PLUGIN_IMPORT PSI_mdl_bootstrap *	psi_mdl_hook
MYSQL_PLUGIN_IMPORT PSI_memory_bootstrap *	psi_memory_hook
MYSQL_PLUGIN_IMPORT PSI_mutex_bootstrap *	psi_mutex_hook
MYSQL_PLUGIN_IMPORT PSI_metric_bootstrap *	psi_metric_hook
MYSQL_PLUGIN_IMPORT PSI_rwlock_bootstrap *	psi_rwlock_hook
MYSQL_PLUGIN_IMPORT PSI_socket_bootstrap *	psi_socket_hook
MYSQL_PLUGIN_IMPORT PSI_stage_bootstrap *	psi_stage_hook
MYSQL_PLUGIN_IMPORT PSI_statement_bootstrap *	psi_statement_hook
MYSQL_PLUGIN_IMPORT PSI_system_bootstrap *	psi_system_hook
MYSQL_PLUGIN_IMPORT PSI_table_bootstrap *	psi_table_hook
MYSQL_PLUGIN_IMPORT PSI_thread_bootstrap *	psi_thread_hook
MYSQL_PLUGIN_IMPORT PSI_transaction_bootstrap *	psi_transaction_hook
MYSQL_PLUGIN_IMPORT PSI_tls_channel_bootstrap *	psi_tls_channel_hook
bool	binlog_cache_temporary_file_is_encrypted
	(end of group MYSYS) More...

Detailed Description

Common header for many mysys elements.

Note

Many mysys implementation files now have their own header file.

Function Documentation

mysql_encryption_file_read()

size_t mysql_encryption_file_read	(	IO_CACHE *	cache,
		uchar *	buffer,
		size_t	count,
		myf	flags
	)

This is a wrapper around mysql_file_read.

Read data from the temporary file of a binlog cache, and take care of decrypting the data if binlog_encryption is on.

Parameters

	cache	The handler of a binlog cache to read.
[out]	buffer	The memory buffer to write to.
	count	The length of data in the temporary file to be read in bytes.
	flags	The bitmap of different flags MY_WME | MY_FAE | MY_NABP | MY_FNABP | MY_DONT_CHECK_FILESIZE and so on.

Return values

The	length of bytes to be read, or MY_FILE_ERROR on error.

mysql_encryption_file_seek()

my_off_t mysql_encryption_file_seek	(	IO_CACHE *	cache,
		my_off_t	pos,
		int	whence,
		myf	flags
	)

This is a wrapper around mysql_file_seek.

Seek to a position in the temporary file of a binlog cache, and set the encryption/decryption stream offset if binlog_encryption is on.

Parameters

cache	The handler of a binlog cache to seek.
pos	The expected position (absolute or relative)
whence	A direction parameter and one of {SEEK_SET, SEEK_CUR, SEEK_END}
flags	The bitmap of different flags MY_WME | MY_FAE | MY_NABP | MY_FNABP | MY_DONT_CHECK_FILESIZE and so on.

Return values

The	new position in the file, or MY_FILEPOS_ERROR on error.

mysql_encryption_file_write()

size_t mysql_encryption_file_write	(	IO_CACHE *	cache,
		const uchar *	buffer,
		size_t	count,
		myf	flags
	)

This is a wrapper around mysql_file_write.

Write data in buffer to the temporary file of a binlog cache, and take care of encrypting the data if binlog_encryption is on.

Parameters

cache	The handler of a binlog cache to write.
buffer	The memory buffer to write from.
count	The length of data in buffer to be written in bytes.
flags	The bitmap of different flags MY_WME | MY_FAE | MY_NABP | MY_FNABP | MY_DONT_CHECK_FILESIZE and so on

Returns

The number of bytes written

Variable Documentation

binlog_cache_temporary_file_is_encrypted

bool binlog_cache_temporary_file_is_encrypted

extern

(end of group MYSYS)