Merge latest trunk changes with this branch.

FossilOrigin-Name: 4b3651677e7132c4c45605bc1f216fc08ef31198

1 files changed, 187 insertions, 134 deletions

diff --git a/src/os_win.c b/src/os_win.c
index 015b6c61d..e2f9aecac 100644
--- a/src/os_win.c
+++ b/src/os_win.c
@@ -34,6 +34,11 @@
  with SQLITE_OMIT_WAL."
 #endif
 
+#if !SQLITE_OS_WINNT && SQLITE_MAX_MMAP_SIZE>0
+#  error "Memory mapped files require support from the Windows NT kernel,\
+ compile with SQLITE_MAX_MMAP_SIZE=0."
+#endif
+
 /*
 ** Are most of the Win32 ANSI APIs available (i.e. with certain exceptions
 ** based on the sub-platform)?
@@ -72,18 +77,14 @@
 #endif
 
 /*
-** Check if the GetVersionEx[AW] functions should be considered deprecated
-** and avoid using them in that case.  It should be noted here that if the
-** value of the SQLITE_WIN32_GETVERSIONEX pre-processor macro is zero
-** (whether via this block or via being manually specified), that implies
-** the underlying operating system will always be based on the Windows NT
-** Kernel.
+** Check to see if the GetVersionEx[AW] functions are deprecated on the
+** target system.  GetVersionEx was first deprecated in Win8.1.
 */
 #ifndef SQLITE_WIN32_GETVERSIONEX
 #  if defined(NTDDI_VERSION) && NTDDI_VERSION >= NTDDI_WINBLUE
-#    define SQLITE_WIN32_GETVERSIONEX   0
+#    define SQLITE_WIN32_GETVERSIONEX   0   /* GetVersionEx() is deprecated */
 #  else
-#    define SQLITE_WIN32_GETVERSIONEX   1
+#    define SQLITE_WIN32_GETVERSIONEX   1   /* GetVersionEx() is current */
 #  endif
 #endif
 
@@ -155,7 +156,7 @@
 ** [sometimes] not used by the code (e.g. via conditional compilation).
 */
 #ifndef UNUSED_VARIABLE_VALUE
-#  define UNUSED_VARIABLE_VALUE(x) (void)(x)
+#  define UNUSED_VARIABLE_VALUE(x)      (void)(x)
 #endif
 
 /*
@@ -167,10 +168,11 @@
 
 /*
 ** Do we need to manually define the Win32 file mapping APIs for use with WAL
-** mode (e.g. these APIs are available in the Windows CE SDK; however, they
-** are not present in the header file)?
+** mode or memory mapped files (e.g. these APIs are available in the Windows
+** CE SDK; however, they are not present in the header file)?
 */
-#if SQLITE_WIN32_FILEMAPPING_API && !defined(SQLITE_OMIT_WAL)
+#if SQLITE_WIN32_FILEMAPPING_API && \
+        (!defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0)
 /*
 ** Two of the file mapping APIs are different under WinRT.  Figure out which
 ** set we need.
@@ -198,13 +200,13 @@ WINBASEAPI LPVOID WINAPI MapViewOfFile(HANDLE, DWORD, DWORD, DWORD, SIZE_T);
 ** This file mapping API is common to both Win32 and WinRT.
 */
 WINBASEAPI BOOL WINAPI UnmapViewOfFile(LPCVOID);
-#endif /* SQLITE_WIN32_FILEMAPPING_API && !defined(SQLITE_OMIT_WAL) */
+#endif /* SQLITE_WIN32_FILEMAPPING_API */
 
 /*
 ** Some Microsoft compilers lack this definition.
 */
 #ifndef INVALID_FILE_ATTRIBUTES
-# define INVALID_FILE_ATTRIBUTES ((DWORD)-1) 
+# define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
 #endif
 
 #ifndef FILE_FLAG_MASK
@@ -254,7 +256,7 @@ struct winFile {
   int szChunk;            /* Chunk size configured by FCNTL_CHUNK_SIZE */
 #if SQLITE_OS_WINCE
   LPWSTR zDeleteOnClose;  /* Name of file to delete when closing */
-  HANDLE hMutex;          /* Mutex used to control access to shared lock */  
+  HANDLE hMutex;          /* Mutex used to control access to shared lock */
   HANDLE hShared;         /* Shared memory segment used for locking */
   winceLock local;        /* Locks obtained by this instance of winFile */
   winceLock *shared;      /* Global shared lock memory for the file  */
@@ -414,10 +416,9 @@ const sqlite3_mem_methods *sqlite3MemGetWin32(void);
 ** can manually set this value to 1 to emulate Win98 behavior.
 */
 #ifdef SQLITE_TEST
-int sqlite3_os_type = 0;
-#elif !SQLITE_OS_WINCE && !SQLITE_OS_WINRT && \
-      defined(SQLITE_WIN32_HAS_ANSI) && defined(SQLITE_WIN32_HAS_WIDE)
-static int sqlite3_os_type = 0;
+LONG SQLITE_WIN32_VOLATILE sqlite3_os_type = 0;
+#else
+static LONG SQLITE_WIN32_VOLATILE sqlite3_os_type = 0;
 #endif
 
 #ifndef SYSCALL
@@ -492,7 +493,7 @@ static struct win_syscall {
         LPSECURITY_ATTRIBUTES,DWORD,DWORD,HANDLE))aSyscall[5].pCurrent)
 
 #if (!SQLITE_OS_WINRT && defined(SQLITE_WIN32_HAS_ANSI) && \
-        !defined(SQLITE_OMIT_WAL))
+        (!defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0))
   { "CreateFileMappingA",      (SYSCALL)CreateFileMappingA,      0 },
 #else
   { "CreateFileMappingA",      (SYSCALL)0,                       0 },
@@ -502,7 +503,7 @@ static struct win_syscall {
         DWORD,DWORD,DWORD,LPCSTR))aSyscall[6].pCurrent)
 
 #if SQLITE_OS_WINCE || (!SQLITE_OS_WINRT && defined(SQLITE_WIN32_HAS_WIDE) && \
-        !defined(SQLITE_OMIT_WAL))
+        (!defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0))
   { "CreateFileMappingW",      (SYSCALL)CreateFileMappingW,      0 },
 #else
   { "CreateFileMappingW",      (SYSCALL)0,                       0 },
@@ -842,7 +843,8 @@ static struct win_syscall {
         LPOVERLAPPED))aSyscall[48].pCurrent)
 #endif
 
-#if SQLITE_OS_WINCE || (!SQLITE_OS_WINRT && !defined(SQLITE_OMIT_WAL))
+#if SQLITE_OS_WINCE || (!SQLITE_OS_WINRT && \
+        (!defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0))
   { "MapViewOfFile",           (SYSCALL)MapViewOfFile,           0 },
 #else
   { "MapViewOfFile",           (SYSCALL)0,                       0 },
@@ -912,7 +914,7 @@ static struct win_syscall {
 #define osUnlockFileEx ((BOOL(WINAPI*)(HANDLE,DWORD,DWORD,DWORD, \
         LPOVERLAPPED))aSyscall[58].pCurrent)
 
-#if SQLITE_OS_WINCE || !defined(SQLITE_OMIT_WAL)
+#if SQLITE_OS_WINCE || !defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0
   { "UnmapViewOfFile",         (SYSCALL)UnmapViewOfFile,         0 },
 #else
   { "UnmapViewOfFile",         (SYSCALL)0,                       0 },
@@ -948,7 +950,7 @@ static struct win_syscall {
 #define osWaitForSingleObject ((DWORD(WINAPI*)(HANDLE, \
         DWORD))aSyscall[63].pCurrent)
 
-#if SQLITE_OS_WINRT
+#if !SQLITE_OS_WINCE
   { "WaitForSingleObjectEx",   (SYSCALL)WaitForSingleObjectEx,   0 },
 #else
   { "WaitForSingleObjectEx",   (SYSCALL)0,                       0 },
@@ -975,7 +977,7 @@ static struct win_syscall {
 #define osGetFileInformationByHandleEx ((BOOL(WINAPI*)(HANDLE, \
         FILE_INFO_BY_HANDLE_CLASS,LPVOID,DWORD))aSyscall[66].pCurrent)
 
-#if SQLITE_OS_WINRT && !defined(SQLITE_OMIT_WAL)
+#if SQLITE_OS_WINRT && (!defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0)
   { "MapViewOfFileFromApp",    (SYSCALL)MapViewOfFileFromApp,    0 },
 #else
   { "MapViewOfFileFromApp",    (SYSCALL)0,                       0 },
@@ -1039,7 +1041,7 @@ static struct win_syscall {
 
 #define osGetProcessHeap ((HANDLE(WINAPI*)(VOID))aSyscall[74].pCurrent)
 
-#if SQLITE_OS_WINRT && !defined(SQLITE_OMIT_WAL)
+#if SQLITE_OS_WINRT && (!defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0)
   { "CreateFileMappingFromApp", (SYSCALL)CreateFileMappingFromApp, 0 },
 #else
   { "CreateFileMappingFromApp", (SYSCALL)0,                      0 },
@@ -1048,6 +1050,22 @@ static struct win_syscall {
 #define osCreateFileMappingFromApp ((HANDLE(WINAPI*)(HANDLE, \
         LPSECURITY_ATTRIBUTES,ULONG,ULONG64,LPCWSTR))aSyscall[75].pCurrent)
 
+/*
+** NOTE: On some sub-platforms, the InterlockedCompareExchange "function"
+**       is really just a macro that uses a compiler intrinsic (e.g. x64).
+**       So do not try to make this is into a redefinable interface.
+*/
+#if defined(InterlockedCompareExchange)
+  { "InterlockedCompareExchange", (SYSCALL)0,                    0 },
+
+#define osInterlockedCompareExchange InterlockedCompareExchange
+#else
+  { "InterlockedCompareExchange", (SYSCALL)InterlockedCompareExchange, 0 },
+
+#define osInterlockedCompareExchange ((LONG(WINAPI*)(LONG \
+        SQLITE_WIN32_VOLATILE*, LONG,LONG))aSyscall[76].pCurrent)
+#endif /* defined(InterlockedCompareExchange) */
+
 }; /* End of the overrideable system calls */
 
 /*
@@ -1185,8 +1203,8 @@ int sqlite3_win32_reset_heap(){
   int rc;
   MUTEX_LOGIC( sqlite3_mutex *pMaster; ) /* The main static mutex */
   MUTEX_LOGIC( sqlite3_mutex *pMem; )    /* The memsys static mutex */
-  MUTEX_LOGIC( pMaster = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); )
-  MUTEX_LOGIC( pMem = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MEM); )
+  MUTEX_LOGIC( pMaster = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MASTER); )
+  MUTEX_LOGIC( pMem = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MEM); )
   sqlite3_mutex_enter(pMaster);
   sqlite3_mutex_enter(pMem);
   winMemAssertMagic();
@@ -1279,6 +1297,16 @@ void sqlite3_win32_sleep(DWORD milliseconds){
 #endif
 }
 
+#if SQLITE_MAX_WORKER_THREADS>0 && !SQLITE_OS_WINCE && !SQLITE_OS_WINRT && \
+        SQLITE_THREADSAFE>0
+DWORD sqlite3Win32Wait(HANDLE hObject){
+  DWORD rc;
+  while( (rc = osWaitForSingleObjectEx(hObject, INFINITE,
+                                       TRUE))==WAIT_IO_COMPLETION ){}
+  return rc;
+}
+#endif
+
 /*
 ** Return true (non-zero) if we are running under WinNT, Win2K, WinXP,
 ** or WinCE.  Return false (zero) for Win95, Win98, or WinME.
@@ -1298,22 +1326,47 @@ void sqlite3_win32_sleep(DWORD milliseconds){
 #elif !defined(SQLITE_WIN32_HAS_WIDE)
 # define osIsNT()  (0)
 #else
-  static int osIsNT(void){
-    if( sqlite3_os_type==0 ){
-#if defined(NTDDI_VERSION) && NTDDI_VERSION >= NTDDI_WIN8
-      OSVERSIONINFOW sInfo;
-      sInfo.dwOSVersionInfoSize = sizeof(sInfo);
-      osGetVersionExW(&sInfo);
-#else
-      OSVERSIONINFOA sInfo;
-      sInfo.dwOSVersionInfoSize = sizeof(sInfo);
-      osGetVersionExA(&sInfo);
+# define osIsNT()  ((sqlite3_os_type==2) || sqlite3_win32_is_nt())
+#endif
+
+/*
+** This function determines if the machine is running a version of Windows
+** based on the NT kernel.
+*/
+int sqlite3_win32_is_nt(void){
+#if SQLITE_OS_WINRT
+  /*
+  ** NOTE: The WinRT sub-platform is always assumed to be based on the NT
+  **       kernel.
+  */
+  return 1;
+#elif defined(SQLITE_WIN32_GETVERSIONEX) && SQLITE_WIN32_GETVERSIONEX
+  if( osInterlockedCompareExchange(&sqlite3_os_type, 0, 0)==0 ){
+#if defined(SQLITE_WIN32_HAS_ANSI)
+    OSVERSIONINFOA sInfo;
+    sInfo.dwOSVersionInfoSize = sizeof(sInfo);
+    osGetVersionExA(&sInfo);
+    osInterlockedCompareExchange(&sqlite3_os_type,
+        (sInfo.dwPlatformId == VER_PLATFORM_WIN32_NT) ? 2 : 1, 0);
+#elif defined(SQLITE_WIN32_HAS_WIDE)
+    OSVERSIONINFOW sInfo;
+    sInfo.dwOSVersionInfoSize = sizeof(sInfo);
+    osGetVersionExW(&sInfo);
+    osInterlockedCompareExchange(&sqlite3_os_type,
+        (sInfo.dwPlatformId == VER_PLATFORM_WIN32_NT) ? 2 : 1, 0);
 #endif
-      sqlite3_os_type = sInfo.dwPlatformId==VER_PLATFORM_WIN32_NT ? 2 : 1;
-    }
-    return sqlite3_os_type==2;
   }
+  return osInterlockedCompareExchange(&sqlite3_os_type, 2, 2)==2;
+#elif SQLITE_TEST
+  return osInterlockedCompareExchange(&sqlite3_os_type, 2, 2)==2;
+#else
+  /*
+  ** NOTE: All sub-platforms where the GetVersionEx[AW] functions are
+  **       deprecated are always assumed to be based on the NT kernel.
+  */
+  return 1;
 #endif
+}
 
 #ifdef SQLITE_WIN32_MALLOC
 /*
@@ -1521,7 +1574,7 @@ void sqlite3MemSetDefault(void){
 #endif /* SQLITE_WIN32_MALLOC */
 
 /*
-** Convert a UTF-8 string to Microsoft Unicode (UTF-16?). 
+** Convert a UTF-8 string to Microsoft Unicode (UTF-16?).
 **
 ** Space to hold the returned string is obtained from malloc.
 */
@@ -1574,7 +1627,7 @@ static char *winUnicodeToUtf8(LPCWSTR zWideFilename){
 /*
 ** Convert an ANSI string to Microsoft Unicode, based on the
 ** current codepage settings for file apis.
-** 
+**
 ** Space to hold the returned string is obtained
 ** from sqlite3_malloc.
 */
@@ -1648,7 +1701,7 @@ char *sqlite3_win32_mbcs_to_utf8(const char *zFilename){
 }
 
 /*
-** Convert UTF-8 to multibyte character string.  Space to hold the 
+** Convert UTF-8 to multibyte character string.  Space to hold the
 ** returned string is obtained from sqlite3_malloc().
 */
 char *sqlite3_win32_utf8_to_mbcs(const char *zFilename){
@@ -1788,11 +1841,11 @@ static int winGetLastErrorMsg(DWORD lastErrno, int nBuf, char *zBuf){
 **
 ** This routine is invoked after an error occurs in an OS function.
 ** It logs a message using sqlite3_log() containing the current value of
-** error code and, if possible, the human-readable equivalent from 
+** error code and, if possible, the human-readable equivalent from
 ** FormatMessage.
 **
 ** The first argument passed to the macro should be the error code that
-** will be returned to SQLite (e.g. SQLITE_IOERR_DELETE, SQLITE_CANTOPEN). 
+** will be returned to SQLite (e.g. SQLITE_IOERR_DELETE, SQLITE_CANTOPEN).
 ** The two subsequent arguments should be the name of the OS function that
 ** failed and the associated file-system path, if any.
 */
@@ -1823,7 +1876,7 @@ static int winLogErrorAtLine(
 
 /*
 ** The number of times that a ReadFile(), WriteFile(), and DeleteFile()
-** will be retried following a locking error - probably caused by 
+** will be retried following a locking error - probably caused by
 ** antivirus software.  Also the initial delay before the first retry.
 ** The delay increases linearly with each retry.
 */
@@ -1898,7 +1951,7 @@ static int winRetryIoerr(int *pnRetry, DWORD *pError){
 */
 static void winLogIoerr(int nRetry){
   if( nRetry ){
-    sqlite3_log(SQLITE_IOERR, 
+    sqlite3_log(SQLITE_IOERR,
       "delayed %dms for lock/sharing conflict",
       winIoerrRetryDelay*nRetry*(nRetry+1)/2
     );
@@ -1992,17 +2045,17 @@ static int winceCreateLock(const char *zFilename, winFile *pFile){
 
   /* Acquire the mutex before continuing */
   winceMutexAcquire(pFile->hMutex);
-  
-  /* Since the names of named mutexes, semaphores, file mappings etc are 
+
+  /* Since the names of named mutexes, semaphores, file mappings etc are
   ** case-sensitive, take advantage of that by uppercasing the mutex name
   ** and using that as the shared filemapping name.
   */
   osCharUpperW(zName);
   pFile->hShared = osCreateFileMappingW(INVALID_HANDLE_VALUE, NULL,
                                         PAGE_READWRITE, 0, sizeof(winceLock),
-                                        zName);  
+                                        zName);
 
-  /* Set a flag that indicates we're the first to create the memory so it 
+  /* Set a flag that indicates we're the first to create the memory so it
   ** must be zero-initialized */
   lastErrno = osGetLastError();
   if (lastErrno == ERROR_ALREADY_EXISTS){
@@ -2013,7 +2066,7 @@ static int winceCreateLock(const char *zFilename, winFile *pFile){
 
   /* If we succeeded in making the shared memory handle, map it. */
   if( pFile->hShared ){
-    pFile->shared = (winceLock*)osMapViewOfFile(pFile->hShared, 
+    pFile->shared = (winceLock*)osMapViewOfFile(pFile->hShared,
              FILE_MAP_READ|FILE_MAP_WRITE, 0, 0, sizeof(winceLock));
     /* If mapping failed, close the shared memory handle and erase it */
     if( !pFile->shared ){
@@ -2039,7 +2092,7 @@ static int winceCreateLock(const char *zFilename, winFile *pFile){
     pFile->hMutex = NULL;
     return SQLITE_IOERR;
   }
-  
+
   /* Initialize the shared memory if we're supposed to */
   if( bInit ){
     memset(pFile->shared, 0, sizeof(winceLock));
@@ -2077,13 +2130,13 @@ static void winceDestroyLock(winFile *pFile){
     osCloseHandle(pFile->hShared);
 
     /* Done with the mutex */
-    winceMutexRelease(pFile->hMutex);    
+    winceMutexRelease(pFile->hMutex);
     osCloseHandle(pFile->hMutex);
     pFile->hMutex = NULL;
   }
 }
 
-/* 
+/*
 ** An implementation of the LockFile() API of Windows for CE
 */
 static BOOL winceLockFile(
@@ -2294,8 +2347,8 @@ static BOOL winUnlockFile(
 #endif
 
 /*
-** Move the current position of the file handle passed as the first 
-** argument to offset iOffset within the file. If successful, return 0. 
+** Move the current position of the file handle passed as the first
+** argument to offset iOffset within the file. If successful, return 0.
 ** Otherwise, set pFile->lastErrno and return non-zero.
 */
 static int winSeekFile(winFile *pFile, sqlite3_int64 iOffset){
@@ -2310,11 +2363,11 @@ static int winSeekFile(winFile *pFile, sqlite3_int64 iOffset){
   upperBits = (LONG)((iOffset>>32) & 0x7fffffff);
   lowerBits = (LONG)(iOffset & 0xffffffff);
 
-  /* API oddity: If successful, SetFilePointer() returns a dword 
+  /* API oddity: If successful, SetFilePointer() returns a dword
   ** containing the lower 32-bits of the new file-offset. Or, if it fails,
-  ** it returns INVALID_SET_FILE_POINTER. However according to MSDN, 
-  ** INVALID_SET_FILE_POINTER may also be a valid new offset. So to determine 
-  ** whether an error has actually occurred, it is also necessary to call 
+  ** it returns INVALID_SET_FILE_POINTER. However according to MSDN,
+  ** INVALID_SET_FILE_POINTER may also be a valid new offset. So to determine
+  ** whether an error has actually occurred, it is also necessary to call
   ** GetLastError().
   */
   dwRet = osSetFilePointer(pFile->h, lowerBits, &upperBits, FILE_BEGIN);
@@ -2397,7 +2450,7 @@ static int winClose(sqlite3_file *id){
     int cnt = 0;
     while(
            osDeleteFileW(pFile->zDeleteOnClose)==0
-        && osGetFileAttributesW(pFile->zDeleteOnClose)!=0xffffffff 
+        && osGetFileAttributesW(pFile->zDeleteOnClose)!=0xffffffff
         && cnt++ < WINCE_DELETION_ATTEMPTS
     ){
        sqlite3_win32_sleep(100);  /* Wait a little before trying again */
@@ -2426,7 +2479,7 @@ static int winRead(
   int amt,                   /* Number of bytes to read */
   sqlite3_int64 offset       /* Begin reading at this offset */
 ){
-#if !SQLITE_OS_WINCE
+#if !SQLITE_OS_WINCE && !defined(SQLITE_WIN32_NO_OVERLAPPED)
   OVERLAPPED overlapped;          /* The offset for ReadFile. */
 #endif
   winFile *pFile = (winFile*)id;  /* file handle */
@@ -2458,7 +2511,7 @@ static int winRead(
   }
 #endif
 
-#if SQLITE_OS_WINCE
+#if SQLITE_OS_WINCE || defined(SQLITE_WIN32_NO_OVERLAPPED)
   if( winSeekFile(pFile, offset) ){
     OSTRACE(("READ file=%p, rc=SQLITE_FULL\n", pFile->h));
     return SQLITE_FULL;
@@ -2530,13 +2583,13 @@ static int winWrite(
   }
 #endif
 
-#if SQLITE_OS_WINCE
+#if SQLITE_OS_WINCE || defined(SQLITE_WIN32_NO_OVERLAPPED)
   rc = winSeekFile(pFile, offset);
   if( rc==0 ){
 #else
   {
 #endif
-#if !SQLITE_OS_WINCE
+#if !SQLITE_OS_WINCE && !defined(SQLITE_WIN32_NO_OVERLAPPED)
     OVERLAPPED overlapped;        /* The offset for WriteFile. */
 #endif
     u8 *aRem = (u8 *)pBuf;        /* Data yet to be written */
@@ -2544,14 +2597,14 @@ static int winWrite(
     DWORD nWrite;                 /* Bytes written by each WriteFile() call */
     DWORD lastErrno = NO_ERROR;   /* Value returned by GetLastError() */
 
-#if !SQLITE_OS_WINCE
+#if !SQLITE_OS_WINCE && !defined(SQLITE_WIN32_NO_OVERLAPPED)
     memset(&overlapped, 0, sizeof(OVERLAPPED));
     overlapped.Offset = (LONG)(offset & 0xffffffff);
     overlapped.OffsetHigh = (LONG)((offset>>32) & 0x7fffffff);
 #endif
 
     while( nRem>0 ){
-#if SQLITE_OS_WINCE
+#if SQLITE_OS_WINCE || defined(SQLITE_WIN32_NO_OVERLAPPED)
       if( !osWriteFile(pFile->h, aRem, nRem, &nWrite, 0) ){
 #else
       if( !osWriteFile(pFile->h, aRem, nRem, &nWrite, &overlapped) ){
@@ -2564,7 +2617,7 @@ static int winWrite(
         lastErrno = osGetLastError();
         break;
       }
-#if !SQLITE_OS_WINCE
+#if !SQLITE_OS_WINCE && !defined(SQLITE_WIN32_NO_OVERLAPPED)
       offset += nWrite;
       overlapped.Offset = (LONG)(offset & 0xffffffff);
       overlapped.OffsetHigh = (LONG)((offset>>32) & 0x7fffffff);
@@ -3087,7 +3140,7 @@ static int winUnlock(sqlite3_file *id, int locktype){
 }
 
 /*
-** If *pArg is inititially negative then this is a query.  Set *pArg to
+** If *pArg is initially negative then this is a query.  Set *pArg to
 ** 1 or 0 depending on whether or not bit mask of pFile->ctrlFlags is set.
 **
 ** If *pArg is 0 or 1, then clear or set the mask bit of pFile->ctrlFlags.
@@ -3245,7 +3298,7 @@ static int winDeviceCharacteristics(sqlite3_file *id){
          ((p->ctrlFlags & WINFILE_PSOW)?SQLITE_IOCAP_POWERSAFE_OVERWRITE:0);
 }
 
-/* 
+/*
 ** Windows will only let you create file view mappings
 ** on allocation size granularity boundaries.
 ** During sqlite3_os_init() we do a GetSystemInfo()
@@ -3257,11 +3310,11 @@ static SYSTEM_INFO winSysInfo;
 
 /*
 ** Helper functions to obtain and relinquish the global mutex. The
-** global mutex is used to protect the winLockInfo objects used by 
+** global mutex is used to protect the winLockInfo objects used by
 ** this file, all of which may be shared by multiple threads.
 **
-** Function winShmMutexHeld() is used to assert() that the global mutex 
-** is held when required. This function is only used as part of assert() 
+** Function winShmMutexHeld() is used to assert() that the global mutex
+** is held when required. This function is only used as part of assert()
 ** statements. e.g.
 **
 **   winShmEnterMutex()
@@ -3291,10 +3344,10 @@ static int winShmMutexHeld(void) {
 ** this object or while reading or writing the following fields:
 **
 **      nRef
-**      pNext 
+**      pNext
 **
 ** The following fields are read-only after the object is created:
-** 
+**
 **      fid
 **      zFilename
 **
@@ -3390,7 +3443,7 @@ static int winShmSystemLock(
     if( lockType == _SHM_WRLCK ) dwFlags |= LOCKFILE_EXCLUSIVE_LOCK;
     rc = winLockFile(&pFile->hFile.h, dwFlags, ofst, 0, nByte, 0);
   }
-  
+
   if( rc!= 0 ){
     rc = SQLITE_OK;
   }else{
@@ -3486,7 +3539,7 @@ static int winOpenSharedMemory(winFile *pDbFd){
   }
   pNew->zFilename = (char*)&pNew[1];
   sqlite3_snprintf(nName+15, pNew->zFilename, "%s-shm", pDbFd->zPath);
-  sqlite3FileSuffix3(pDbFd->zPath, pNew->zFilename); 
+  sqlite3FileSuffix3(pDbFd->zPath, pNew->zFilename);
 
   /* Look to see if there is an existing winShmNode that can be used.
   ** If no matching winShmNode currently exists, create a new one.
@@ -3523,7 +3576,7 @@ static int winOpenSharedMemory(winFile *pDbFd){
     }
 
     /* Check to see if another process is holding the dead-man switch.
-    ** If not, truncate the file to zero length. 
+    ** If not, truncate the file to zero length.
     */
     if( winShmSystemLock(pShmNode, _SHM_WRLCK, WIN_SHM_DMS, 1)==SQLITE_OK ){
       rc = winTruncate((sqlite3_file *)&pShmNode->hFile, 0);
@@ -3552,7 +3605,7 @@ static int winOpenSharedMemory(winFile *pDbFd){
   ** the cover of the winShmEnterMutex() mutex and the pointer from the
   ** new (struct winShm) object to the pShmNode has been set. All that is
   ** left to do is to link the new object into the linked list starting
-  ** at pShmNode->pFirst. This must be done while holding the pShmNode->mutex 
+  ** at pShmNode->pFirst. This must be done while holding the pShmNode->mutex
   ** mutex.
   */
   sqlite3_mutex_enter(pShmNode->mutex);
@@ -3572,7 +3625,7 @@ shm_open_err:
 }
 
 /*
-** Close a connection to shared-memory.  Delete the underlying 
+** Close a connection to shared-memory.  Delete the underlying
 ** storage if deleteFlag is true.
 */
 static int winShmUnmap(
@@ -3661,7 +3714,7 @@ static int winShmLock(
     if( rc==SQLITE_OK ){
       p->exclMask &= ~mask;
       p->sharedMask &= ~mask;
-    } 
+    }
   }else if( flags & SQLITE_SHM_SHARED ){
     u16 allShared = 0;  /* Union of locks held by connections other than "p" */
 
@@ -3700,7 +3753,7 @@ static int winShmLock(
         break;
       }
     }
-  
+
     /* Get the exclusive locks at the system level.  Then if successful
     ** also mark the local connection as being locked.
     */
@@ -3720,7 +3773,7 @@ static int winShmLock(
 }
 
 /*
-** Implement a memory barrier or memory fence on shared memory.  
+** Implement a memory barrier or memory fence on shared memory.
 **
 ** All loads and stores begun before the barrier must complete before
 ** any load or store begun after the barrier.
@@ -3735,22 +3788,22 @@ static void winShmBarrier(
 }
 
 /*
-** This function is called to obtain a pointer to region iRegion of the 
-** shared-memory associated with the database file fd. Shared-memory regions 
-** are numbered starting from zero. Each shared-memory region is szRegion 
+** This function is called to obtain a pointer to region iRegion of the
+** shared-memory associated with the database file fd. Shared-memory regions
+** are numbered starting from zero. Each shared-memory region is szRegion
 ** bytes in size.
 **
 ** If an error occurs, an error code is returned and *pp is set to NULL.
 **
 ** Otherwise, if the isWrite parameter is 0 and the requested shared-memory
 ** region has not been allocated (by any client, including one running in a
-** separate process), then *pp is set to NULL and SQLITE_OK returned. If 
-** isWrite is non-zero and the requested shared-memory region has not yet 
+** separate process), then *pp is set to NULL and SQLITE_OK returned. If
+** isWrite is non-zero and the requested shared-memory region has not yet
 ** been allocated, it is allocated by this function.
 **
 ** If the shared-memory region has already been allocated or is allocated by
-** this call as described above, then it is mapped into this processes 
-** address space (if it is not already), *pp is set to point to the mapped 
+** this call as described above, then it is mapped into this processes
+** address space (if it is not already), *pp is set to point to the mapped
 ** memory and SQLITE_OK returned.
 */
 static int winShmMap(
@@ -3822,17 +3875,17 @@ static int winShmMap(
     while( pShmNode->nRegion<=iRegion ){
       HANDLE hMap = NULL;         /* file-mapping handle */
       void *pMap = 0;             /* Mapped memory region */
-     
+
 #if SQLITE_OS_WINRT
       hMap = osCreateFileMappingFromApp(pShmNode->hFile.h,
           NULL, PAGE_READWRITE, nByte, NULL
       );
 #elif defined(SQLITE_WIN32_HAS_WIDE)
-      hMap = osCreateFileMappingW(pShmNode->hFile.h, 
+      hMap = osCreateFileMappingW(pShmNode->hFile.h,
           NULL, PAGE_READWRITE, 0, nByte, NULL
       );
 #elif defined(SQLITE_WIN32_HAS_ANSI)
-      hMap = osCreateFileMappingA(pShmNode->hFile.h, 
+      hMap = osCreateFileMappingA(pShmNode->hFile.h,
           NULL, PAGE_READWRITE, 0, nByte, NULL
       );
 #endif
@@ -3929,14 +3982,14 @@ static int winUnmapfile(winFile *pFile){
 
 /*
 ** Memory map or remap the file opened by file-descriptor pFd (if the file
-** is already mapped, the existing mapping is replaced by the new). Or, if 
-** there already exists a mapping for this file, and there are still 
+** is already mapped, the existing mapping is replaced by the new). Or, if
+** there already exists a mapping for this file, and there are still
 ** outstanding xFetch() references to it, this function is a no-op.
 **
-** If parameter nByte is non-negative, then it is the requested size of 
-** the mapping to create. Otherwise, if nByte is less than zero, then the 
+** If parameter nByte is non-negative, then it is the requested size of
+** the mapping to create. Otherwise, if nByte is less than zero, then the
 ** requested size is the size of the file on disk. The actual size of the
-** created mapping is either the requested size or the value configured 
+** created mapping is either the requested size or the value configured
 ** using SQLITE_FCNTL_MMAP_SIZE, whichever is smaller.
 **
 ** SQLITE_OK is returned if no error occurs (even if the mapping is not
@@ -3965,7 +4018,7 @@ static int winMapfile(winFile *pFd, sqlite3_int64 nByte){
     nMap = pFd->mmapSizeMax;
   }
   nMap &= ~(sqlite3_int64)(winSysInfo.dwPageSize - 1);
- 
+
   if( nMap==0 && pFd->mmapSize>0 ){
     winUnmapfile(pFd);
   }
@@ -4037,7 +4090,7 @@ static int winMapfile(winFile *pFd, sqlite3_int64 nByte){
 ** Finally, if an error does occur, return an SQLite error code. The final
 ** value of *pp is undefined in this case.
 **
-** If this function does return a pointer, the caller must eventually 
+** If this function does return a pointer, the caller must eventually
 ** release the reference by calling winUnfetch().
 */
 static int winFetch(sqlite3_file *fd, i64 iOff, int nAmt, void **pp){
@@ -4072,20 +4125,20 @@ static int winFetch(sqlite3_file *fd, i64 iOff, int nAmt, void **pp){
 }
 
 /*
-** If the third argument is non-NULL, then this function releases a 
+** If the third argument is non-NULL, then this function releases a
 ** reference obtained by an earlier call to winFetch(). The second
 ** argument passed to this function must be the same as the corresponding
-** argument that was passed to the winFetch() invocation. 
+** argument that was passed to the winFetch() invocation.
 **
-** Or, if the third argument is NULL, then this function is being called 
-** to inform the VFS layer that, according to POSIX, any existing mapping 
+** Or, if the third argument is NULL, then this function is being called
+** to inform the VFS layer that, according to POSIX, any existing mapping
 ** may now be invalid and should be unmapped.
 */
 static int winUnfetch(sqlite3_file *fd, i64 iOff, void *p){
 #if SQLITE_MAX_MMAP_SIZE>0
   winFile *pFd = (winFile*)fd;   /* The underlying database file */
 
-  /* If p==0 (unmap the entire file) then there must be no outstanding 
+  /* If p==0 (unmap the entire file) then there must be no outstanding
   ** xFetch references. Or, if p!=0 (meaning it is an xFetch reference),
   ** then there must be at least one outstanding.  */
   assert( (p==0)==(pFd->nFetchOut==0) );
@@ -4101,7 +4154,7 @@ static int winUnfetch(sqlite3_file *fd, i64 iOff, void *p){
   }else{
     /* FIXME:  If Windows truly always prevents truncating or deleting a
     ** file while a mapping is held, then the following winUnmapfile() call
-    ** is unnecessary can can be omitted - potentially improving
+    ** is unnecessary can be omitted - potentially improving
     ** performance.  */
     winUnmapfile(pFd);
   }
@@ -4231,7 +4284,7 @@ static int winGetTempname(sqlite3_vfs *pVfs, char **pzBuf){
 
   /* It's odd to simulate an io-error here, but really this is just
   ** using the io-error infrastructure to test that SQLite handles this
-  ** function failing. 
+  ** function failing.
   */
   SimulateIOError( return SQLITE_IOERR );
 
@@ -4413,7 +4466,7 @@ static int winGetTempname(sqlite3_vfs *pVfs, char **pzBuf){
   }
 
   /*
-  ** Check that the output buffer is large enough for the temporary file 
+  ** Check that the output buffer is large enough for the temporary file
   ** name in the following format:
   **
   **   "<temporary_directory>/etilqs_XXXXXXXXXXXXXXX\0\0"
@@ -4516,8 +4569,8 @@ static int winOpen(
 
 #ifndef NDEBUG
   int isOpenJournal = (isCreate && (
-        eType==SQLITE_OPEN_MASTER_JOURNAL 
-     || eType==SQLITE_OPEN_MAIN_JOURNAL 
+        eType==SQLITE_OPEN_MASTER_JOURNAL
+     || eType==SQLITE_OPEN_MAIN_JOURNAL
      || eType==SQLITE_OPEN_WAL
   ));
 #endif
@@ -4525,9 +4578,9 @@ static int winOpen(
   OSTRACE(("OPEN name=%s, pFile=%p, flags=%x, pOutFlags=%p\n",
            zUtf8Name, id, flags, pOutFlags));
 
-  /* Check the following statements are true: 
+  /* Check the following statements are true:
   **
-  **   (a) Exactly one of the READWRITE and READONLY flags must be set, and 
+  **   (a) Exactly one of the READWRITE and READONLY flags must be set, and
   **   (b) if CREATE is set, then READWRITE must also be set, and
   **   (c) if EXCLUSIVE is set, then CREATE must also be set.
   **   (d) if DELETEONCLOSE is set, then CREATE must also be set.
@@ -4537,7 +4590,7 @@ static int winOpen(
   assert(isExclusive==0 || isCreate);
   assert(isDelete==0 || isCreate);
 
-  /* The main DB, main journal, WAL file and master journal are never 
+  /* The main DB, main journal, WAL file and master journal are never
   ** automatically deleted. Nor are they ever temporary files.  */
   assert( (!isDelete && zName) || eType!=SQLITE_OPEN_MAIN_DB );
   assert( (!isDelete && zName) || eType!=SQLITE_OPEN_MAIN_JOURNAL );
@@ -4545,9 +4598,9 @@ static int winOpen(
   assert( (!isDelete && zName) || eType!=SQLITE_OPEN_WAL );
 
   /* Assert that the upper layer has set one of the "file-type" flags. */
-  assert( eType==SQLITE_OPEN_MAIN_DB      || eType==SQLITE_OPEN_TEMP_DB 
-       || eType==SQLITE_OPEN_MAIN_JOURNAL || eType==SQLITE_OPEN_TEMP_JOURNAL 
-       || eType==SQLITE_OPEN_SUBJOURNAL   || eType==SQLITE_OPEN_MASTER_JOURNAL 
+  assert( eType==SQLITE_OPEN_MAIN_DB      || eType==SQLITE_OPEN_TEMP_DB
+       || eType==SQLITE_OPEN_MAIN_JOURNAL || eType==SQLITE_OPEN_TEMP_JOURNAL
+       || eType==SQLITE_OPEN_SUBJOURNAL   || eType==SQLITE_OPEN_MASTER_JOURNAL
        || eType==SQLITE_OPEN_TRANSIENT_DB || eType==SQLITE_OPEN_WAL
   );
 
@@ -4562,8 +4615,8 @@ static int winOpen(
   }
 #endif
 
-  /* If the second argument to this function is NULL, generate a 
-  ** temporary file name to use 
+  /* If the second argument to this function is NULL, generate a
+  ** temporary file name to use
   */
   if( !zUtf8Name ){
     assert( isDelete && !isOpenJournal );
@@ -4603,8 +4656,8 @@ static int winOpen(
     dwDesiredAccess = GENERIC_READ;
   }
 
-  /* SQLITE_OPEN_EXCLUSIVE is used to make sure that a new file is 
-  ** created. SQLite doesn't use it to indicate "exclusive access" 
+  /* SQLITE_OPEN_EXCLUSIVE is used to make sure that a new file is
+  ** created. SQLite doesn't use it to indicate "exclusive access"
   ** as it is usually understood.
   */
   if( isExclusive ){
@@ -4693,7 +4746,7 @@ static int winOpen(
     sqlite3_free(zConverted);
     sqlite3_free(zTmpname);
     if( isReadWrite && !isExclusive ){
-      return winOpen(pVfs, zName, id, 
+      return winOpen(pVfs, zName, id,
          ((flags|SQLITE_OPEN_READONLY) &
                      ~(SQLITE_OPEN_CREATE|SQLITE_OPEN_READWRITE)),
          pOutFlags);
@@ -4902,14 +4955,14 @@ static int winAccess(
     WIN32_FILE_ATTRIBUTE_DATA sAttrData;
     memset(&sAttrData, 0, sizeof(sAttrData));
     while( !(rc = osGetFileAttributesExW((LPCWSTR)zConverted,
-                             GetFileExInfoStandard, 
+                             GetFileExInfoStandard,
                              &sAttrData)) && winRetryIoerr(&cnt, &lastErrno) ){}
     if( rc ){
       /* For an SQLITE_ACCESS_EXISTS query, treat a zero-length file
       ** as if it does not exist.
       */
       if(    flags==SQLITE_ACCESS_EXISTS
-          && sAttrData.nFileSizeHigh==0 
+          && sAttrData.nFileSizeHigh==0
           && sAttrData.nFileSizeLow==0 ){
         attr = INVALID_FILE_ATTRIBUTES;
       }else{
@@ -5008,7 +5061,7 @@ static int winFullPathname(
   int nFull,                    /* Size of output buffer in bytes */
   char *zFull                   /* Output buffer */
 ){
-  
+
 #if defined(__CYGWIN__)
   SimulateIOError( return SQLITE_ERROR );
   UNUSED_PARAMETER(nFull);
@@ -5321,12 +5374,12 @@ int sqlite3_current_time = 0;  /* Fake system time in seconds since 1970. */
 ** epoch of noon in Greenwich on November 24, 4714 B.C according to the
 ** proleptic Gregorian calendar.
 **
-** On success, return SQLITE_OK.  Return SQLITE_ERROR if the time and date 
+** On success, return SQLITE_OK.  Return SQLITE_ERROR if the time and date
 ** cannot be found.
 */
 static int winCurrentTimeInt64(sqlite3_vfs *pVfs, sqlite3_int64 *piNow){
-  /* FILETIME structure is a 64-bit value representing the number of 
-     100-nanosecond intervals since January 1, 1601 (= JD 2305813.5). 
+  /* FILETIME structure is a 64-bit value representing the number of
+     100-nanosecond intervals since January 1, 1601 (= JD 2305813.5).
   */
   FILETIME ft;
   static const sqlite3_int64 winFiletimeEpoch = 23058135*(sqlite3_int64)8640000;
@@ -5334,7 +5387,7 @@ static int winCurrentTimeInt64(sqlite3_vfs *pVfs, sqlite3_int64 *piNow){
   static const sqlite3_int64 unixEpoch = 24405875*(sqlite3_int64)8640000;
 #endif
   /* 2^32 - to avoid use of LL and warnings in gcc */
-  static const sqlite3_int64 max32BitValue = 
+  static const sqlite3_int64 max32BitValue =
       (sqlite3_int64)2000000000 + (sqlite3_int64)2000000000 +
       (sqlite3_int64)294967296;
 
@@ -5350,7 +5403,7 @@ static int winCurrentTimeInt64(sqlite3_vfs *pVfs, sqlite3_int64 *piNow){
 #endif
 
   *piNow = winFiletimeEpoch +
-            ((((sqlite3_int64)ft.dwHighDateTime)*max32BitValue) + 
+            ((((sqlite3_int64)ft.dwHighDateTime)*max32BitValue) +
                (sqlite3_int64)ft.dwLowDateTime)/(sqlite3_int64)10000;
 
 #ifdef SQLITE_TEST
@@ -5469,7 +5522,7 @@ int sqlite3_os_init(void){
 
   /* Double-check that the aSyscall[] array has been constructed
   ** correctly.  See ticket [bb3a86e890c8e96ab] */
-  assert( ArraySize(aSyscall)==76 );
+  assert( ArraySize(aSyscall)==77 );
 
   /* get memory map allocation granularity */
   memset(&winSysInfo, 0, sizeof(SYSTEM_INFO));
@@ -5487,10 +5540,10 @@ int sqlite3_os_init(void){
   sqlite3_vfs_register(&winLongPathVfs, 0);
 #endif
 
-  return SQLITE_OK; 
+  return SQLITE_OK;
 }
 
-int sqlite3_os_end(void){ 
+int sqlite3_os_end(void){
 #if SQLITE_OS_WINRT
   if( sleepObj!=NULL ){
     osCloseHandle(sleepObj);