Adding the timezone plugin service, to convert between

MYSQL_TIME and my_time_t and back.

Using the new service instead of direct access to thd.

added:
  include/mysql/service_thd_timezone.h
  libservices/thd_timezone_service.c
modified:
  include/my_time.h
  include/mysql.h.pp
  include/mysql/plugin.h
  include/mysql/plugin_audit.h.pp
  include/mysql/plugin_auth.h.pp
  include/mysql/plugin_ftparser.h.pp
  include/mysql/services.h
  include/mysql_time.h
  include/service_versions.h
  libservices/CMakeLists.txt
  sql/sql_class.cc
  sql/sql_plugin_services.h
  storage/connect/value.cpp

include/my_time.h

@@ -29,16 +29,6 @@ C_MODE_START
 extern ulonglong log_10_int[20];
 extern uchar days_in_month[];
 
-/*
-  Portable time_t replacement.
-  Should be signed and hold seconds for 1902 -- 2038-01-19 range
-  i.e at least a 32bit variable
-
-  Using the system built in time_t is not an option as
-  we rely on the above requirements in the time functions
-*/
-typedef long my_time_t;
-
 #define MY_TIME_T_MAX LONG_MAX
 #define MY_TIME_T_MIN LONG_MIN
 

include/mysql.h.pp

@@ -143,6 +143,7 @@ const char *mysql_errno_to_sqlstate(unsigned int mysql_errno);
 my_bool my_thread_init(void);
 void my_thread_end(void);
 #include "mysql_time.h"
+typedef long my_time_t;
 enum enum_mysql_timestamp_type
 {
   MYSQL_TIMESTAMP_NONE= -2, MYSQL_TIMESTAMP_ERROR= -1,

include/mysql/plugin.h

@@ -72,7 +72,7 @@ typedef struct st_mysql_xid MYSQL_XID;
 #define MYSQL_PLUGIN_INTERFACE_VERSION 0x0103
 
 /* MariaDB plugin interface version */
-#define MARIA_PLUGIN_INTERFACE_VERSION 0x0104
+#define MARIA_PLUGIN_INTERFACE_VERSION 0x0105
 
 /*
   The allowable types of plugins

include/mysql/plugin_audit.h.pp

@@ -85,6 +85,28 @@ extern struct kill_statement_service_st {
   enum thd_kill_levels (*thd_kill_level_func)(const void*);
 } *thd_kill_statement_service;
 enum thd_kill_levels thd_kill_level(const void*);
+#include <mysql/service_thd_timezone.h>
+typedef char my_bool;
+#include "mysql_time.h"
+typedef long my_time_t;
+enum enum_mysql_timestamp_type
+{
+  MYSQL_TIMESTAMP_NONE= -2, MYSQL_TIMESTAMP_ERROR= -1,
+  MYSQL_TIMESTAMP_DATE= 0, MYSQL_TIMESTAMP_DATETIME= 1, MYSQL_TIMESTAMP_TIME= 2
+};
+typedef struct st_mysql_time
+{
+  unsigned int year, month, day, hour, minute, second;
+  unsigned long second_part;
+  my_bool neg;
+  enum enum_mysql_timestamp_type time_type;
+} MYSQL_TIME;
+extern struct thd_timezone_service_st {
+  my_time_t (*thd_TIME_to_gmt_sec)(void* thd, const MYSQL_TIME *ltime, unsigned int *errcode);
+  void (*thd_gmt_sec_to_TIME)(void* thd, MYSQL_TIME *ltime, my_time_t t);
+} *thd_timezone_service;
+my_time_t thd_TIME_to_gmt_sec(void* thd, const MYSQL_TIME *ltime, uint *errcode);
+void thd_gmt_sec_to_TIME(void* thd, MYSQL_TIME *ltime, my_time_t t);
 struct st_mysql_xid {
   long formatID;
   long gtrid_length;

include/mysql/plugin_auth.h.pp

@@ -85,6 +85,28 @@ extern struct kill_statement_service_st {
   enum thd_kill_levels (*thd_kill_level_func)(const void*);
 } *thd_kill_statement_service;
 enum thd_kill_levels thd_kill_level(const void*);
+#include <mysql/service_thd_timezone.h>
+typedef char my_bool;
+#include "mysql_time.h"
+typedef long my_time_t;
+enum enum_mysql_timestamp_type
+{
+  MYSQL_TIMESTAMP_NONE= -2, MYSQL_TIMESTAMP_ERROR= -1,
+  MYSQL_TIMESTAMP_DATE= 0, MYSQL_TIMESTAMP_DATETIME= 1, MYSQL_TIMESTAMP_TIME= 2
+};
+typedef struct st_mysql_time
+{
+  unsigned int year, month, day, hour, minute, second;
+  unsigned long second_part;
+  my_bool neg;
+  enum enum_mysql_timestamp_type time_type;
+} MYSQL_TIME;
+extern struct thd_timezone_service_st {
+  my_time_t (*thd_TIME_to_gmt_sec)(void* thd, const MYSQL_TIME *ltime, unsigned int *errcode);
+  void (*thd_gmt_sec_to_TIME)(void* thd, MYSQL_TIME *ltime, my_time_t t);
+} *thd_timezone_service;
+my_time_t thd_TIME_to_gmt_sec(void* thd, const MYSQL_TIME *ltime, uint *errcode);
+void thd_gmt_sec_to_TIME(void* thd, MYSQL_TIME *ltime, my_time_t t);
 struct st_mysql_xid {
   long formatID;
   long gtrid_length;

include/mysql/plugin_ftparser.h.pp

@@ -85,6 +85,28 @@ extern struct kill_statement_service_st {
   enum thd_kill_levels (*thd_kill_level_func)(const void*);
 } *thd_kill_statement_service;
 enum thd_kill_levels thd_kill_level(const void*);
+#include <mysql/service_thd_timezone.h>
+typedef char my_bool;
+#include "mysql_time.h"
+typedef long my_time_t;
+enum enum_mysql_timestamp_type
+{
+  MYSQL_TIMESTAMP_NONE= -2, MYSQL_TIMESTAMP_ERROR= -1,
+  MYSQL_TIMESTAMP_DATE= 0, MYSQL_TIMESTAMP_DATETIME= 1, MYSQL_TIMESTAMP_TIME= 2
+};
+typedef struct st_mysql_time
+{
+  unsigned int year, month, day, hour, minute, second;
+  unsigned long second_part;
+  my_bool neg;
+  enum enum_mysql_timestamp_type time_type;
+} MYSQL_TIME;
+extern struct thd_timezone_service_st {
+  my_time_t (*thd_TIME_to_gmt_sec)(void* thd, const MYSQL_TIME *ltime, unsigned int *errcode);
+  void (*thd_gmt_sec_to_TIME)(void* thd, MYSQL_TIME *ltime, my_time_t t);
+} *thd_timezone_service;
+my_time_t thd_TIME_to_gmt_sec(void* thd, const MYSQL_TIME *ltime, uint *errcode);
+void thd_gmt_sec_to_TIME(void* thd, MYSQL_TIME *ltime, my_time_t t);
 struct st_mysql_xid {
   long formatID;
   long gtrid_length;

include/mysql/service_thd_timezone.h

+#ifndef MYSQL_SERVICE_THD_TIMEZONE_INCLUDED
+/* Copyright (C) 2013 MariaDB Foundation.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
+
+/**
+  @file
+  This service provdes functions to convert between my_time_t and
+  MYSQL_TIME taking into account the current value of the time_zone
+  session variable.
+
+  The values of the my_time_t type are in Unix timestamp format,
+  i.e. the number of seconds since "1970-01-01 00:00:00 UTC".
+
+  The values of the MYSQL_TIME type are in the current time zone,
+  according to thd->variables.time_zone.
+
+  If the MYSQL_THD parameter is NULL, then global_system_variables.time_zone
+  is used for conversion.
+*/
+
+#ifndef MYSQL_ABI_CHECK
+/*
+  This service currently does not depend on any system headers.
+  If it needs system headers in the future, make sure to put
+  them inside this ifndef.
+*/
+#endif
+
+typedef char my_bool;
+#include "mysql_time.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+extern struct thd_timezone_service_st {
+  my_time_t (*thd_TIME_to_gmt_sec)(MYSQL_THD thd, const MYSQL_TIME *ltime, unsigned int *errcode);
+  void (*thd_gmt_sec_to_TIME)(MYSQL_THD thd, MYSQL_TIME *ltime, my_time_t t);
+} *thd_timezone_service;
+
+#ifdef MYSQL_DYNAMIC_PLUGIN
+
+#define thd_TIME_to_gmt_sec(thd, ltime, errcode) \
+  (thd_timezone_service->thd_TIME_to_gmt_sec((thd), (ltime), (errcode)))
+
+#define thd_gmt_sec_to_TIME(thd, ltime, t) \
+  (thd_timezone_service->thd_gmt_sec_to_TIME((thd), (ltime), (t)))
+
+#else
+
+my_time_t thd_TIME_to_gmt_sec(MYSQL_THD thd, const MYSQL_TIME *ltime, uint *errcode);
+void thd_gmt_sec_to_TIME(MYSQL_THD thd, MYSQL_TIME *ltime, my_time_t t);
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#define MYSQL_SERVICE_THD_TIMEZONE_INCLUDED
+#endif

include/mysql/services.h

@@ -25,6 +25,7 @@ extern "C" {
 #include <mysql/service_progress_report.h>
 #include <mysql/service_debug_sync.h>
 #include <mysql/service_kill_statement.h>
+#include <mysql/service_thd_timezone.h>
 
 #ifdef __cplusplus
 }

include/mysql_time.h

@@ -16,6 +16,17 @@
 #ifndef _mysql_time_h_
 #define _mysql_time_h_
 
+/*
+  Portable time_t replacement.
+  Should be signed and hold seconds for 1902 -- 2038-01-19 range
+  i.e at least a 32bit variable
+
+  Using the system built in time_t is not an option as
+  we rely on the above requirements in the time functions   
+*/
+typedef long my_time_t;
+
+
 /*
   Time declarations shared between the server and client API:
   you should not add anything to this header unless it's used

include/service_versions.h

@@ -26,4 +26,4 @@
 #define VERSION_progress_report         0x0100
 #define VERSION_debug_sync              0x1000
 #define VERSION_kill_statement          0x1000
-
+#define VERSION_thd_timezone            0x0100

libservices/CMakeLists.txt

@@ -19,6 +19,7 @@ SET(MYSQLSERVICES_SOURCES
   my_snprintf_service.c
   thd_alloc_service.c
   thd_wait_service.c
+  thd_timezone_service.c
   progress_report_service.c
   debug_sync_service.c
   kill_statement_service.c)

libservices/thd_timezone_service.c

+/* Copyright (C) 2013 MariaDB Foundation
+   Use is subject to license terms.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
+
+#include <service_versions.h>
+SERVICE_VERSION thd_timezone_service= (void *) VERSION_thd_timezone;

sql/sql_class.cc

@@ -35,6 +35,7 @@
 #include "sql_cache.h"                          // query_cache_abort
 #include "sql_base.h"                           // close_thread_tables
 #include "sql_time.h"                         // date_time_format_copy
+#include "tztime.h"                           // MYSQL_TIME <-> my_time_t
 #include "sql_acl.h"                          // NO_ACCESS,
                                               // acl_getroot_no_password
 #include "sql_base.h"                         // close_temporary_tables
@@ -1261,6 +1262,26 @@ void thd_get_xid(const MYSQL_THD thd, MYSQL_XID *xid)
   *xid = *(MYSQL_XID *) &thd->transaction.xid_state.xid;
 }
 
+
+extern "C"
+my_time_t thd_TIME_to_gmt_sec(MYSQL_THD thd, const MYSQL_TIME *ltime,
+                              unsigned int *errcode)
+{
+  Time_zone *tz= thd ? thd->variables.time_zone :
+                       global_system_variables.time_zone;
+  return tz->TIME_to_gmt_sec(ltime, errcode);
+}
+
+
+extern "C"
+void thd_gmt_sec_to_TIME(MYSQL_THD thd, MYSQL_TIME *ltime, my_time_t t)
+{
+  Time_zone *tz= thd ? thd->variables.time_zone :
+                       global_system_variables.time_zone;
+  tz->gmt_sec_to_TIME(ltime, t);
+}
+
+
 #ifdef _WIN32
 extern "C"   THD *_current_thd_noinline(void)
 {

sql/sql_plugin_services.h

@@ -54,6 +54,11 @@ static struct kill_statement_service_st thd_kill_statement_handler= {
   thd_kill_level
 };
 
+static struct thd_timezone_service_st thd_timezone_handler= {
+  thd_TIME_to_gmt_sec,
+  thd_gmt_sec_to_TIME
+};
+
 static struct st_service_ref list_of_services[]=
 {
   { "my_snprintf_service",         VERSION_my_snprintf,         &my_snprintf_handler },
@@ -61,6 +66,7 @@ static struct st_service_ref list_of_services[]=
   { "thd_wait_service",            VERSION_thd_wait,            &thd_wait_handler },
   { "progress_report_service",     VERSION_progress_report,     &progress_report_handler },
   { "debug_sync_service",          VERSION_debug_sync,          0 }, // updated in plugin_init()
-  { "thd_kill_statement_service",  VERSION_kill_statement,      &thd_kill_statement_handler }
+  { "thd_kill_statement_service",  VERSION_kill_statement,      &thd_kill_statement_handler },
+  { "thd_timezone_service",        VERSION_thd_timezone,        &thd_timezone_handler },
 };
 

storage/connect/value.cpp

@@ -1224,9 +1224,6 @@ void DTVAL::SetTimeShift(void)
 /*  though the gmtime C function. The purpose of this function is to   */
 /*  extend the range of valid dates by accepting negative time values. */
 /***********************************************************************/
-#define MYSQL_SERVER 1
-#include "tztime.h"
-#include "sql_priv.h"
 #include "sql_class.h"
 #include "sql_time.h"
 
@@ -1245,7 +1242,7 @@ static void TIME_to_localtime(struct tm *tm, const MYSQL_TIME *ltime)
 static struct tm *gmtime_mysql(const time_t *timep, struct tm *tm)
 {
   MYSQL_TIME ltime;
-  current_thd->variables.time_zone->gmt_sec_to_TIME(&ltime, (my_time_t) *timep);
+  thd_gmt_sec_to_TIME(current_thd, &ltime, (my_time_t) *timep);
   TIME_to_localtime(tm, &ltime);
   return tm;
 }