Merge of mysql-5.1-bugteam into mysql-trunk-merge.

7 files changed, 168 insertions, 53 deletions

diff --git a/include/Makefile.am b/include/Makefile.am
index e610a8e325c..b440fa7aeaa 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -45,7 +45,7 @@ noinst_HEADERS =	config-win.h config-netware.h lf.h my_bit.h \
 			my_vle.h my_user.h my_atomic.h atomic/nolock.h \
 			atomic/rwlock.h atomic/x86-gcc.h atomic/generic-msvc.h \
 			atomic/gcc_builtins.h my_libwrap.h my_stacktrace.h \
-			atomic/solaris.h mysql/innodb_priv.h
+			atomic/solaris.h mysql/innodb_priv.h my_compiler.h
 
 EXTRA_DIST =        mysql.h.pp mysql/plugin.h.pp probes_mysql.d.base \
 			CMakeLists.txt \
diff --git a/include/my_compiler.h b/include/my_compiler.h
new file mode 100644
index 00000000000..0a83c6587a5
--- /dev/null
+++ b/include/my_compiler.h
@@ -0,0 +1,127 @@
+#ifndef MY_COMPILER_INCLUDED
+#define MY_COMPILER_INCLUDED
+
+/* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+
+   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 */
+
+/**
+  Header for compiler-dependent features.
+
+  Intended to contain a set of reusable wrappers for preprocessor
+  macros, attributes, pragmas, and any other features that are
+  specific to a target compiler.
+*/
+
+#include <my_global.h>                          /* stddef.h offsetof */
+
+/**
+  Compiler-dependent internal convenience macros.
+*/
+
+/* GNU C/C++ */
+#if defined __GNUC__
+/* Any after 2.95... */
+# define MY_ALIGN_EXT
+
+/* Microsoft Visual C++ */
+#elif defined _MSC_VER
+# define MY_ALIGNOF(type)   __alignof(type)
+# define MY_ALIGNED(n)      __declspec(align(n))
+
+/* Oracle Solaris Studio */
+#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC)
+# if (__SUNPRO_C >= 0x590) || (__SUNPRO_CC >= 0x590)
+#   define MY_ALIGN_EXT
+# endif
+
+/* IBM XL C/C++ */
+#elif defined __xlC__
+# if __xlC__ >= 0x0600
+#   define MY_ALIGN_EXT
+# endif
+
+/* HP aCC */
+#elif defined(__HP_aCC) || defined(__HP_cc)
+# if (__HP_aCC >= 60000) || (__HP_cc >= 60000)
+#   define MY_ALIGN_EXT
+# endif
+#endif
+
+#ifdef MY_ALIGN_EXT
+/** Specifies the minimum alignment of a type. */
+# define MY_ALIGNOF(type)   __alignof__(type)
+/** Determine the alignment requirement of a type. */
+# define MY_ALIGNED(n)      __attribute__((__aligned__((n))))
+#endif
+
+/**
+  Generic compiler-dependent features.
+*/
+#ifndef MY_ALIGNOF
+# ifdef __cplusplus
+    template<typename type> struct my_alignof_helper { char m1; type m2; };
+    /* Invalid for non-POD types, but most compilers give the right answer. */
+#   define MY_ALIGNOF(type)   offsetof(my_alignof_helper<type>, m2)
+# else
+#   define MY_ALIGNOF(type)   offsetof(struct { char m1; type m2; }, m2)
+# endif
+#endif
+
+/**
+  C++ Type Traits
+*/
+
+#ifdef __cplusplus
+
+/**
+  Opaque storage with a particular alignment.
+*/
+# if defined(MY_ALIGNED)
+/* Partial specialization used due to MSVC++. */
+template<size_t alignment> struct my_alignment_imp;
+template<> struct MY_ALIGNED(1) my_alignment_imp<1> {};
+template<> struct MY_ALIGNED(2) my_alignment_imp<2> {};
+template<> struct MY_ALIGNED(4) my_alignment_imp<4> {};
+template<> struct MY_ALIGNED(8) my_alignment_imp<8> {};
+template<> struct MY_ALIGNED(16) my_alignment_imp<16> {};
+/* ... expand as necessary. */
+# else
+template<size_t alignment>
+struct my_alignment_imp { double m1; };
+# endif
+
+/**
+  A POD type with a given size and alignment.
+
+  @remark If the compiler does not support a alignment attribute
+          (MY_ALIGN macro), the default alignment of a double is
+          used instead.
+
+  @tparam size        The minimum size.
+  @tparam alignment   The desired alignment: 1, 2, 4, 8 or 16.
+*/
+template <size_t size, size_t alignment>
+struct my_aligned_storage
+{
+  union
+  {
+    char data[size];
+    my_alignment_imp<alignment> align;
+  };
+};
+
+#endif /* __cplusplus */
+
+#endif /* MY_COMPILER_INCLUDED */
diff --git a/include/my_global.h b/include/my_global.h
index d7bedd100a0..82a20053bfc 100644
--- a/include/my_global.h
+++ b/include/my_global.h
@@ -1083,20 +1083,6 @@ typedef long long	my_ptrdiff_t;
 #define ADD_TO_PTR(ptr,size,type) (type) ((uchar*) (ptr)+size)
 #define PTR_BYTE_DIFF(A,B) (my_ptrdiff_t) ((uchar*) (A) - (uchar*) (B))
 
-#define MY_DIV_UP(A, B) (((A) + (B) - 1) / (B))
-#define MY_ALIGNED_BYTE_ARRAY(N, S, T) T N[MY_DIV_UP(S, sizeof(T))]
-
-#ifdef __cplusplus
-template <size_t sz> struct Aligned_char_array
-{
-  union {
-    void *v;                                    // Ensures alignment.
-    char arr[sz];                               // The actual buffer.
-  } u;
-  void* arr() { return &u.arr[0]; }
-};
-#endif  /* __cplusplus  */
-
 /*
   Custom version of standard offsetof() macro which can be used to get
   offsets of members in class for non-POD types (according to the current
diff --git a/sql/rpl_handler.cc b/sql/rpl_handler.cc
index be0a61bcae2..a7b963d186c 100644
--- a/sql/rpl_handler.cc
+++ b/sql/rpl_handler.cc
@@ -89,24 +89,27 @@ int get_user_var_str(const char *name, char *value,
 
 int delegates_init()
 {
-  static Aligned_char_array<sizeof(Trans_delegate)>           trans_mem;
-  static Aligned_char_array<sizeof(Binlog_storage_delegate)>  storage_mem;
+  static my_aligned_storage<sizeof(Trans_delegate), MY_ALIGNOF(long)> trans_mem;
+  static my_aligned_storage<sizeof(Binlog_storage_delegate),
+                            MY_ALIGNOF(long)> storage_mem;
 #ifdef HAVE_REPLICATION
-  static Aligned_char_array<sizeof(Binlog_transmit_delegate)> transmit_mem;
-  static Aligned_char_array<sizeof(Binlog_relay_IO_delegate)> relay_io_mem;
+  static my_aligned_storage<sizeof(Binlog_transmit_delegate),
+                            MY_ALIGNOF(long)> transmit_mem;
+  static my_aligned_storage<sizeof(Binlog_relay_IO_delegate),
+                            MY_ALIGNOF(long)> relay_io_mem;
 #endif
 
-  if (!(transaction_delegate= new (trans_mem.arr()) Trans_delegate)
+  if (!(transaction_delegate= new (trans_mem.data) Trans_delegate)
       || (!transaction_delegate->is_inited())
       || !(binlog_storage_delegate=
-           new (storage_mem.arr()) Binlog_storage_delegate)
+           new (storage_mem.data) Binlog_storage_delegate)
       || (!binlog_storage_delegate->is_inited())
 #ifdef HAVE_REPLICATION
       || !(binlog_transmit_delegate=
-           new (transmit_mem.arr()) Binlog_transmit_delegate)
+           new (transmit_mem.data) Binlog_transmit_delegate)
       || (!binlog_transmit_delegate->is_inited())
       || !(binlog_relay_io_delegate=
-           new (relay_io_mem.arr()) Binlog_relay_IO_delegate)
+           new (relay_io_mem.data) Binlog_relay_IO_delegate)
       || (!binlog_relay_io_delegate->is_inited())
 #endif /* HAVE_REPLICATION */
       )
diff --git a/sql/spatial.cc b/sql/spatial.cc
index fcf06119db9..f96196cb836 100644
--- a/sql/spatial.cc
+++ b/sql/spatial.cc
@@ -36,7 +36,7 @@ static Geometry::Class_info **ci_collection_end=
                                 Geometry::ci_collection+Geometry::wkb_last + 1;
 
 Geometry::Class_info::Class_info(const char *name, int type_id,
-					 void(*create_func)(void *)):
+                                 create_geom_t create_func):
   m_type_id(type_id), m_create_func(create_func)
 {
   m_name.str= (char *) name;
@@ -45,39 +45,39 @@ Geometry::Class_info::Class_info(const char *name, int type_id,
   ci_collection[type_id]= this;
 }
 
-static void create_point(void *buffer)
+static Geometry *create_point(char *buffer)
 {
-  new(buffer) Gis_point;
+  return new (buffer) Gis_point;
 }
 
-static void create_linestring(void *buffer)
+static Geometry *create_linestring(char *buffer)
 {
-  new(buffer) Gis_line_string;
+  return new (buffer) Gis_line_string;
 }
 
-static void create_polygon(void *buffer)
+static Geometry *create_polygon(char *buffer)
 {
-  new(buffer) Gis_polygon;
+  return new (buffer) Gis_polygon;
 }
 
-static void create_multipoint(void *buffer)
+static Geometry *create_multipoint(char *buffer)
 {
-  new(buffer) Gis_multi_point;
+  return new (buffer) Gis_multi_point;
 }
 
-static void create_multipolygon(void *buffer)
+static Geometry *create_multipolygon(char *buffer)
 {
-  new(buffer) Gis_multi_polygon;
+  return new (buffer) Gis_multi_polygon;
 }
 
-static void create_multilinestring(void *buffer)
+static Geometry *create_multilinestring(char *buffer)
 {
-  new(buffer) Gis_multi_line_string;
+  return new (buffer) Gis_multi_line_string;
 }
 
-static void create_geometrycollection(void *buffer)
+static Geometry *create_geometrycollection(char *buffer)
 {
-  new(buffer) Gis_geometry_collection;
+  return new (buffer) Gis_geometry_collection;
 }
 
 
@@ -131,10 +131,9 @@ Geometry::Class_info *Geometry::find_class(const char *name, uint32 len)
 Geometry *Geometry::create_by_typeid(Geometry_buffer *buffer, int type_id)
 {
   Class_info *ci;
-  if (!(ci= find_class((int) type_id)))
+  if (!(ci= find_class(type_id)))
     return NULL;
-  (*ci->m_create_func)(buffer->buf.arr());
-  return my_reinterpret_cast(Geometry *)(buffer->buf.arr());
+  return (*ci->m_create_func)(buffer->data);
 }
 
 
@@ -172,9 +171,7 @@ Geometry *Geometry::create_from_wkt(Geometry_buffer *buffer,
   if (!(ci= find_class(name.str, name.length)) ||
       wkt->reserve(1 + 4, 512))
     return NULL;
-  (*ci->m_create_func)((void *)buffer);
-  Geometry *result= (Geometry *)buffer;
-  
+  Geometry *result= (*ci->m_create_func)(buffer->data);
   wkt->q_append((char) wkb_ndr);
   wkt->q_append((uint32) result->get_class_info()->m_type_id);
   if (trs->check_next_symbol('(') ||
diff --git a/sql/spatial.h b/sql/spatial.h
index aabbb7a1b97..b0c609ceeef 100644
--- a/sql/spatial.h
+++ b/sql/spatial.h
@@ -17,6 +17,7 @@
 #define _spatial_h
 
 #include "sql_string.h"                         /* String, LEX_STRING */
+#include <my_compiler.h>
 
 #ifdef HAVE_SPATIAL
 
@@ -229,15 +230,18 @@ public:
   {
     wkb_xdr= 0,    /* Big Endian */
     wkb_ndr= 1     /* Little Endian */
-  };                                    
+  };
+
+  /** Callback which creates Geometry objects on top of a given placement. */
+  typedef Geometry *(*create_geom_t)(char *);
 
   class Class_info
   {
   public:
     LEX_STRING m_name;
     int m_type_id;
-    void (*m_create_func)(void *);
-    Class_info(const char *name, int type_id, void(*create_func)(void *));
+    create_geom_t m_create_func;
+    Class_info(const char *name, int type_id, create_geom_t create_func);
   };
 
   virtual const Class_info *get_class_info() const=0;
@@ -525,10 +529,8 @@ public:
   const Class_info *get_class_info() const;
 };
 
-struct Geometry_buffer
-{
-  Aligned_char_array<sizeof(Gis_point)> buf;
-};
+struct Geometry_buffer : public
+  my_aligned_storage<sizeof(Gis_point), MY_ALIGNOF(Gis_point)> {};
 
 #endif /*HAVE_SPATAIAL*/
 #endif
diff --git a/sql/sql_show.cc b/sql/sql_show.cc
index 1ddce1c319d..90aa39fecb4 100644
--- a/sql/sql_show.cc
+++ b/sql/sql_show.cc
@@ -2128,8 +2128,8 @@ static bool show_status_array(THD *thd, const char *wild,
                               bool ucase_names,
                               COND *cond)
 {
-  MY_ALIGNED_BYTE_ARRAY(buff_data, SHOW_VAR_FUNC_BUFF_SIZE, long);
-  char * const buff= (char *) &buff_data;
+  my_aligned_storage<SHOW_VAR_FUNC_BUFF_SIZE, MY_ALIGNOF(long)> buffer;
+  char * const buff= buffer.data;
   char *prefix_end;
   /* the variable name should not be longer than 64 characters */
   char name_buffer[64];