MDEV-9154 : Remove workarounds (mainly dynamic function loading)

for running obsolete versions of Windows

Author: vaintroub

cmake/os/Windows.cmake

@@ -50,7 +50,7 @@ IF(CMAKE_C_COMPILER MATCHES "icl")
 ENDIF()
 
 ADD_DEFINITIONS(-D_WINDOWS -D__WIN__ -D_CRT_SECURE_NO_DEPRECATE)
-ADD_DEFINITIONS(-D_WIN32_WINNT=0x0501)
+ADD_DEFINITIONS(-D_WIN32_WINNT=0x0600)
 # We do not want the windows.h macros min/max
 ADD_DEFINITIONS(-DNOMINMAX)
 # Speed up build process excluding unused header files

extra/yassl/taocrypt/src/random.cpp

@@ -27,7 +27,6 @@
 #include <time.h>
 
 #if defined(_WIN32)
-    #define _WIN32_WINNT 0x0400
     #include <windows.h>
     #include <wincrypt.h>
 #else

include/my_pthread.h

@@ -54,37 +54,16 @@ typedef struct st_pthread_link {
   We use native conditions on Vista and later, and fallback to own 
   implementation on earlier OS version.
 */
-typedef union
-{
-  /* Native condition (used on Vista and later) */
-  CONDITION_VARIABLE native_cond;
-
-  /* Own implementation (used on XP) */
-  struct
-  { 
-    uint32 waiting;
-    CRITICAL_SECTION lock_waiting;
-    enum 
-    {
-      SIGNAL= 0,
-      BROADCAST= 1,
-      MAX_EVENTS= 2
-    } EVENTS;
-    HANDLE events[MAX_EVENTS];
-    HANDLE broadcast_block_event;
-  };
-} pthread_cond_t;
+typedef  CONDITION_VARIABLE pthread_cond_t;
 
 
 typedef int pthread_mutexattr_t;
 #define pthread_self() GetCurrentThreadId()
 #define pthread_handler_t EXTERNC void * __cdecl
 typedef void * (__cdecl *pthread_handler)(void *);
 
-typedef volatile LONG my_pthread_once_t;
-#define MY_PTHREAD_ONCE_INIT  0
-#define MY_PTHREAD_ONCE_INPROGRESS 1
-#define MY_PTHREAD_ONCE_DONE 2
+typedef INIT_ONCE my_pthread_once_t;
+#define MY_PTHREAD_ONCE_INIT INIT_ONCE_STATIC_INIT;
 
 #if !STRUCT_TIMESPEC_HAS_TV_SEC  || !STRUCT_TIMESPEC_HAS_TV_NSEC
 struct timespec {

include/violite.h

@@ -211,14 +211,6 @@ void vio_end(void);
 #define SHUT_RD SD_RECEIVE
 #endif
 
-/*
-  Set thread id for io cancellation (required on Windows XP only,
-  and should to be removed if XP is no more supported)
-*/
-
-#define vio_set_thread_id(vio, tid) if(vio) vio->thread_id= tid
-#else
-#define vio_set_thread_id(vio, tid)
 #endif
 
 /* This enumerator is used in parser - should be always visible */
@@ -288,7 +280,6 @@ struct st_vio
 #ifdef _WIN32
   HANDLE hPipe;
   OVERLAPPED overlapped;
-  DWORD thread_id; /* Used on XP only by vio_shutdown() */
   DWORD read_timeout_ms;
   DWORD write_timeout_ms;
 #endif

mysys/my_default.c

@@ -1124,43 +1124,7 @@ static int add_directory(MEM_ROOT *alloc, const char *dir, const char **dirs)
   return 0;
 }
 
-
 #ifdef __WIN__
-/*
-  This wrapper for GetSystemWindowsDirectory() will dynamically bind to the
-  function if it is available, emulate it on NT4 Terminal Server by stripping
-  the \SYSTEM32 from the end of the results of GetSystemDirectory(), or just
-  return GetSystemDirectory().
- */
-
-typedef UINT (WINAPI *GET_SYSTEM_WINDOWS_DIRECTORY)(LPSTR, UINT);
-
-static size_t my_get_system_windows_directory(char *buffer, size_t size)
-{
-  size_t count;
-  GET_SYSTEM_WINDOWS_DIRECTORY
-    func_ptr= (GET_SYSTEM_WINDOWS_DIRECTORY)
-              GetProcAddress(GetModuleHandle("kernel32.dll"),
-                                             "GetSystemWindowsDirectoryA");
-
-  if (func_ptr)
-    return func_ptr(buffer, (uint) size);
-
-  /*
-    Windows NT 4.0 Terminal Server Edition:  
-    To retrieve the shared Windows directory, call GetSystemDirectory and
-    trim the "System32" element from the end of the returned path.
-  */
-  count= GetSystemDirectory(buffer, (uint) size);
-  if (count > 8 && stricmp(buffer+(count-8), "\\System32") == 0)
-  {
-    count-= 8;
-    buffer[count] = '\0';
-  }
-  return count;
-}
-
-
 static const char *my_get_module_parent(char *buf, size_t size)
 {
   char *last= NULL;
@@ -1209,7 +1173,7 @@ static const char **init_default_directories(MEM_ROOT *alloc)
 
   {
     char fname_buffer[FN_REFLEN];
-    if (my_get_system_windows_directory(fname_buffer, sizeof(fname_buffer)))
+    if (GetSystemWindowsDirectory(fname_buffer, sizeof(fname_buffer)))
       errors += add_directory(alloc, fname_buffer, dirs);
 
     if (GetWindowsDirectory(fname_buffer, sizeof(fname_buffer)))