Bug#21881278: SWITCH MYSYS LIBRARY FROM C TO C++

This patch switches all mysys/ files from .c to .cc.
By doing this we get stricter compile checks (e.g. type checks)
and it makes it possible to use C++ features for future
bug fixes and extensions inside mysys.

Author: jhauglid

client/check/mysqlcheck.cc

@@ -262,6 +262,7 @@ static void usage(void)
 } /* usage */
 
 
+extern "C" {
 static my_bool
 get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
 	       char *argument)
@@ -355,6 +356,7 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
   }
   return 0;
 }
+}
 
 
 static int get_options(int *argc, char ***argv)

client/check/mysqlcheck.h

@@ -136,4 +136,4 @@ class Program
 }
 }
 
-#endif
+#endif

client/mysql.cc

@@ -2809,12 +2809,12 @@ C_MODE_END
 
 #if defined(USE_NEW_READLINE_INTERFACE) 
 static int fake_magic_space(int, int);
-extern "C" char *no_completion(const char*,int)
+char *no_completion(const char*,int)
 #elif defined(USE_LIBEDIT_INTERFACE)
 static int fake_magic_space(const char *, int);
-extern "C" int no_completion(const char*,int)
+int no_completion(const char*,int)
 #else
-extern "C" char *no_completion()
+char *no_completion()
 #endif
 {
   return 0;					/* No filename completion */

client/mysql_config_editor.cc

@@ -100,6 +100,7 @@ enum commands {
   MY_CONFIG_HELP
 };
 
+extern "C" {
 struct my_command_data {
   const int id;
   const char *name;
@@ -109,6 +110,7 @@ struct my_command_data {
                                  const struct my_option *opt,
                                  char *argument);
 };
+}
 
 
 /* mysql_config_editor utility options. */
@@ -212,6 +214,7 @@ static struct my_option my_help_command_options[]=
   {0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
 };
 
+extern "C" {
 static my_bool
 my_program_get_one_option(int optid,
                           const struct my_option *opt __attribute__((unused)),
@@ -321,6 +324,7 @@ my_reset_command_get_one_option(int optid,
   }
   return 0;
 }
+}
 
 static struct my_command_data command_data[]=
 {

client/mysql_secure_installation.cc

@@ -120,6 +120,7 @@ static void free_resources()
     free_defaults(defaults_argv);
 }
 
+extern "C" {
 static my_bool
 my_arguments_get_one_option(int optid,
                             const struct my_option *opt __attribute__((unused)),
@@ -164,6 +165,7 @@ my_arguments_get_one_option(int optid,
   }
   return 0;
 }
+}
 
 
 /* Initialize options for the given connection handle. */

client/mysql_ssl_rsa_setup.cc

@@ -370,6 +370,7 @@ void usage(void)
 }
 
 
+extern "C" {
 static my_bool
 my_arguments_get_one_option(int optid,
                             const struct my_option *opt __attribute__((unused)),
@@ -387,6 +388,7 @@ my_arguments_get_one_option(int optid,
   }
   return 0;
 }
+}
 
 
 static inline

client/mysqlslap.cc

@@ -751,6 +751,7 @@ static void usage(void)
 }
 
 
+extern "C" {
 static my_bool
 get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
                char *argument)
@@ -820,6 +821,7 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
   }
   DBUG_RETURN(0);
 }
+}
 
 
 size_t

include/my_global.h

@@ -626,37 +626,12 @@ struct timespec {
 #endif /* !HAVE_STRUCT_TIMESPEC */
 
 C_MODE_START
-extern ulonglong my_getsystime(void);
-C_MODE_END
+ulonglong my_getsystime(void);
 
-static inline void set_timespec_nsec(struct timespec *abstime, ulonglong nsec)
-{
-#ifdef HAVE_STRUCT_TIMESPEC
-  ulonglong now= my_getsystime() + (nsec / 100);
-  ulonglong tv_sec= now / 10000000ULL;
-#if SIZEOF_TIME_T < SIZEOF_LONG_LONG
-  /* Ensure that the number of seconds don't overflow. */
-  tv_sec= MY_MIN(tv_sec, ((ulonglong)INT_MAX32));
-#endif
-  abstime->tv_sec=  (time_t)tv_sec;
-  abstime->tv_nsec= (now % 10000000ULL) * 100 + (nsec % 100);
-#else /* !HAVE_STRUCT_TIMESPEC */
-  ulonglong max_timeout_msec= (nsec / 1000000);
-  union ft64 tv;
-  GetSystemTimeAsFileTime(&tv.ft);
-  abstime->tv.i64= tv.i64 + (__int64)(nsec / 100);
-#if SIZEOF_LONG < SIZEOF_LONG_LONG
-  /* Ensure that the msec value doesn't overflow. */
-  max_timeout_msec= MY_MIN(max_timeout_msec, ((ulonglong)INT_MAX32));
-#endif
-  abstime->max_timeout_msec= (long)max_timeout_msec;
-#endif /* !HAVE_STRUCT_TIMESPEC */
-}
+void set_timespec_nsec(struct timespec *abstime, ulonglong nsec);
 
-static inline void set_timespec(struct timespec *abstime, ulonglong sec)
-{
-  set_timespec_nsec(abstime, sec * 1000000000ULL);
-}
+void set_timespec(struct timespec *abstime, ulonglong sec);
+C_MODE_END
 
 /**
    Compare two timespec structs.

include/my_sys.h

@@ -743,13 +743,6 @@ File create_temp_file(char *to, const char *dir, const char *pfx,
 		      int mode, myf MyFlags);
 
 // Use Prealloced_array or std::vector or something similar in C++
-#if defined(__cplusplus)
-
-#define init_dynamic_array please_use_an_appropriately_typed_container
-#define my_init_dynamic_array please_use_an_appropriately_typed_container
-
-#else
-
 extern my_bool my_init_dynamic_array(DYNAMIC_ARRAY *array,
                                      PSI_memory_key key,
                                      uint element_size,
@@ -762,8 +755,6 @@ extern my_bool init_dynamic_array(DYNAMIC_ARRAY *array, uint element_size,
 #define dynamic_element(array,array_index,type) \
   ((type)((array)->buffer) +(array_index))
 
-#endif  /* __cplusplus */
-
 /* Some functions are still in use in C++, because HASH uses DYNAMIC_ARRAY */
 extern my_bool insert_dynamic(DYNAMIC_ARRAY *array, const void *element);
 extern void *alloc_dynamic(DYNAMIC_ARRAY *array);
@@ -801,10 +792,7 @@ extern void free_root(MEM_ROOT *root, myf MyFLAGS);
 extern void reset_root_defaults(MEM_ROOT *mem_root, size_t block_size,
                                 size_t prealloc_size);
 extern char *strdup_root(MEM_ROOT *root,const char *str);
-static inline char *safe_strdup_root(MEM_ROOT *root, const char *str)
-{
-  return str ? strdup_root(root, str) : 0;
-}
+extern char *safe_strdup_root(MEM_ROOT *root, const char *str);
 extern char *strmake_root(MEM_ROOT *root,const char *str,size_t len);
 extern void *memdup_root(MEM_ROOT *root,const void *str, size_t len);
 extern void set_memroot_max_capacity(MEM_ROOT *mem_root, size_t size);

include/thr_lock.h

@@ -26,6 +26,8 @@
 #include <my_list.h>
 #include "mysql/psi/mysql_thread.h"
 
+extern mysql_mutex_t THR_LOCK_lock;
+
 #ifdef	__cplusplus
 extern "C" {
 #endif
@@ -134,7 +136,6 @@ typedef struct st_thr_lock {
 
 
 extern LIST *thr_lock_thread_list;
-extern mysql_mutex_t THR_LOCK_lock;
 
 void thr_lock_info_init(THR_LOCK_INFO *info, my_thread_id thread_id,
                         mysql_cond_t *suspend);

mysys/CMakeLists.txt

@@ -15,53 +15,123 @@
 
 INCLUDE_DIRECTORIES(${ZLIB_INCLUDE_DIR} ${CMAKE_SOURCE_DIR}/include ${CMAKE_SOURCE_DIR}/mysys)
 
-SET(MYSYS_SOURCES  array.c charset-def.c charset.c checksum.c
-				errors.c hash.c list.c mf_cache.c mf_dirname.c mf_fn_ext.c
-				mf_format.c mf_getdate.c mf_iocache.c mf_iocache2.c mf_keycache.c 
-				mf_keycaches.c mf_loadpath.c mf_pack.c mf_path.c mf_qsort.c mf_qsort2.c
-				mf_radix.c mf_same.c mf_soundex.c mf_arr_appstr.c
-				mf_tempfile.c mf_unixpath.c mf_wcomp.c mulalloc.c my_access.c
-				my_alloc.c my_bit.c my_bitmap.c my_chsize.c
-				my_compress.c my_copy.c  my_create.c my_delete.c
-				my_div.c my_error.c my_file.c my_fopen.c my_fstream.c 
-				my_gethwaddr.c my_getsystime.c my_getwd.c my_compare.c my_init.c
-				my_lib.c my_lock.c my_malloc.c my_mess.c
-				my_mkdir.c my_mmap.c my_once.c my_open.c my_pread.c
-				my_read.c my_redel.c my_rename.c my_seek.c
-				my_static.c my_symlink.c my_symlink2.c my_sync.c my_thr_init.c 
-				my_write.c ptr_cmp.c queues.c stacktrace.c
-				string.c thr_cond.c thr_lock.c thr_mutex.c
-				thr_rwlock.c tree.c typelib.c base64.c my_memmem.c
-				lf_alloc-pin.c lf_dynarray.c lf_hash.c
-				my_rdtsc.c psi_noop.c my_syslog.c
-				my_chmod.c my_thread.c)
+SET(MYSYS_SOURCES
+  array.cc
+  base64.cc
+  charset.cc
+  charset-def.cc
+  checksum.cc
+  errors.cc
+  hash.cc
+  lf_alloc-pin.cc
+  lf_dynarray.cc
+  lf_hash.cc
+  list.cc
+  mf_arr_appstr.cc
+  mf_cache.cc
+  mf_dirname.cc
+  mf_fn_ext.cc
+  mf_format.cc
+  mf_getdate.cc
+  mf_iocache2.cc
+  mf_iocache.cc
+  mf_keycache.cc
+  mf_keycaches.cc
+  mf_loadpath.cc
+  mf_pack.cc
+  mf_path.cc
+  mf_qsort2.cc
+  mf_qsort.cc
+  mf_radix.cc
+  mf_same.cc
+  mf_soundex.cc
+  mf_tempfile.cc
+  mf_unixpath.cc
+  mf_wcomp.cc
+  mulalloc.cc
+  my_access.cc
+  my_alloc.cc
+  my_bit.cc
+  my_bitmap.cc
+  my_chmod.cc
+  my_chsize.cc
+  my_compare.cc
+  my_compress.cc
+  my_copy.cc
+  my_create.cc
+  my_delete.cc
+  my_div.cc
+  my_error.cc
+  my_file.cc
+  my_fopen.cc
+  my_fstream.cc
+  my_gethwaddr.cc
+  my_getsystime.cc
+  my_getwd.cc
+  my_init.cc
+  my_lib.cc
+  my_lock.cc
+  my_malloc.cc
+  my_memmem.cc
+  my_mess.cc
+  my_mkdir.cc
+  my_mmap.cc
+  my_once.cc
+  my_open.cc
+  my_pread.cc
+  my_rdtsc.cc
+  my_read.cc
+  my_redel.cc
+  my_rename.cc
+  my_seek.cc
+  my_static.cc
+  my_symlink2.cc
+  my_symlink.cc
+  my_sync.cc
+  my_syslog.cc
+  my_thread.cc
+  my_thr_init.cc
+  my_timespec.cc
+  my_write.cc
+  psi_noop.cc
+  ptr_cmp.cc
+  queues.cc
+  stacktrace.cc
+  string.cc
+  thr_cond.cc
+  thr_lock.cc
+  thr_mutex.cc
+  thr_rwlock.cc
+  tree.cc
+  typelib.cc
+)
 
 IF (WIN32)
   LIST(APPEND MYSYS_SOURCES
-    my_conio.c
-    my_windac.c
-    my_winerr.c
-    my_winfile.c
-    win_timers.c
+    my_conio.cc
+    my_windac.cc
+    my_winerr.cc
+    my_winfile.cc
+    win_timers.cc
   )
 ENDIF()
 
 IF(HAVE_POSIX_TIMERS)
- SET(MYSYS_SOURCES ${MYSYS_SOURCES} posix_timers.c)
+ SET(MYSYS_SOURCES ${MYSYS_SOURCES} posix_timers.cc)
 ENDIF()
 
 IF(HAVE_KQUEUE_TIMERS)
-  SET(MYSYS_SOURCES ${MYSYS_SOURCES} kqueue_timers.c)
+  SET(MYSYS_SOURCES ${MYSYS_SOURCES} kqueue_timers.cc)
 ENDIF()
 
 IF(CMAKE_SYSTEM_NAME MATCHES "SunOS" AND CMAKE_C_COMPILER_ID MATCHES "SunPro")
   # Inline assembly template for rdtsc
-  SET_SOURCE_FILES_PROPERTIES(my_rdtsc.c
+  SET_SOURCE_FILES_PROPERTIES(my_rdtsc.cc
    PROPERTIES COMPILE_FLAGS "${CMAKE_CURRENT_SOURCE_DIR}/my_timer_cycles.il")
 ENDIF()
 
 IF(HAVE_LINUX_LARGE_PAGES)
- SET(MYSYS_SOURCES ${MYSYS_SOURCES} my_largepage.c)
+ SET(MYSYS_SOURCES ${MYSYS_SOURCES} my_largepage.cc)
 ENDIF()
 
 ADD_CONVENIENCE_LIBRARY(mysys ${MYSYS_SOURCES})
@@ -74,15 +144,15 @@ IF(CMAKE_USE_PTHREADS_INIT AND CMAKE_C_FLAGS MATCHES "-fsanitize=")
   TARGET_LINK_LIBRARIES(mysys pthread)
 ENDIF()
 
-ADD_EXECUTABLE(thr_lock thr_lock.c)
+ADD_EXECUTABLE(thr_lock thr_lock.cc)
 TARGET_LINK_LIBRARIES(thr_lock mysys)
 SET_TARGET_PROPERTIES(thr_lock PROPERTIES COMPILE_FLAGS "-DMAIN")
-ADD_EXECUTABLE(queues queues.c)
+ADD_EXECUTABLE(queues queues.cc)
 TARGET_LINK_LIBRARIES(queues mysys)
 SET_TARGET_PROPERTIES(queues PROPERTIES COMPILE_FLAGS "-DMAIN")
 ADD_TEST(queues_test queues)
 
-ADD_EXECUTABLE(base64_test base64.c)
+ADD_EXECUTABLE(base64_test base64.cc)
 SET_TARGET_PROPERTIES(base64_test PROPERTIES COMPILE_FLAGS "-DMAIN")
 TARGET_LINK_LIBRARIES(base64_test mysys)