The win32 driver compiles but does not yet work well. Many bugs

fixed. (CVS 4282) FossilOrigin-Name: 3a68fcddfa9184e4b310ce0a21312c54b9462ec8
2025-08-07 02:42:48 +03:00 · 2007-08-24 03:51:33 +00:00
parent bae37537b0
commit 153c62c461
21 changed files with 781 additions and 1058 deletions
--- a/50
+++ b/50
@@ -1,5 +1,5 @@
-C Make\scomments\sand\svariable\snaming\smore\sconsistent\sWRT\srowid\sversus\ndocid/blockid.\s\sThis\sshould\shave\sno\scode\simpact.\s(CVS\s4281)
-D 2007-08-23T20:28:49
+C The\swin32\sdriver\scompiles\sbut\sdoes\snot\syet\swork\swell.\s\sMany\sbugs\nfixed.\s(CVS\s4282)
+D 2007-08-24T03:51:33
 F Makefile.in 0c0e53720f658c7a551046442dd7afba0b72bfbe
 F Makefile.linux-gcc 65241babba6faf1152bf86574477baab19190499
 F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@@ -80,13 +80,13 @@ F src/alter.c f0aac0060ae8102e58f210b44d35b53438d53173
 F src/analyze.c a14237d869c6bea0846493b59317e4097e81a0b6
 F src/attach.c a52225c75b107be8c5bc144a2b6d20201be3f8f8
 F src/auth.c 083c1205b45e3f52291ec539d396b4fc557856b3
-F src/btree.c 8fa6341b74ab70a28001e4ed4bc5ba14ce1401a6
+F src/btree.c fe9d292cee1a7fee1e5834ecaa3eb2103f7398bc
 F src/btree.h 76c89673981cb77575300c0b78a76eaa00a28743
 F src/btreeInt.h 7fc6e51dc3d4bbed15639a8ea1aae737631d6670
 F src/build.c bc7406e2ea5bfa8276ee1abeae1db27a98fd0b33
 F src/callback.c a542236a68060caad378efa30006ca46cf77b1b2
 F src/complete.c b6dea59fb6d7b3201fa1e0e552cda8c2258a4f50
-F src/date.c a80b33f6e70d619978622547d2c78ab8b036b31a
+F src/date.c af235f38f50809abd0a96da3bb3e0cc32be6226e
 F src/delete.c 849846d06d29851dde0d9f424a5de5817eb140d1
 F src/experimental.c 1b2d1a6cd62ecc39610e97670332ca073c50792b
 F src/expr.c 978afdceb2693ef58ec0040a43fe57afc6e4236c
@@ -98,34 +98,34 @@ F src/journal.c 03d6b5cc1afe7c5e3cd0af55415f5168eb094398
 F src/legacy.c 7e1b1c57694e49cbadf561e2a7d9cd984dc743b5
 F src/limits.h 71ab25f17e35e0a9f3f6f234b8ed49cc56731d35
 F src/loadext.c 8b31e2e0e961918fa045515459aee1c122d8c266
-F src/main.c 527f27c74d22d83713abbd1550fd5a4ecce89aca
-F src/malloc.c 8078d4c3f9217c0bb018e432d8655c14996bb107
+F src/main.c 795ec066ce38908b5c35ca4353bb601d022e2275
+F src/malloc.c d4282f50964ab1ca31f504c97b7cf2fdb4d4195d
 F src/md5.c c5fdfa5c2593eaee2e32a5ce6c6927c986eaf217
-F src/mem1.c 7b023d45dd71944414db469c742457239e24d74d
-F src/mem2.c 48919353f72b8f6e957a0021eb9deaf863998189
+F src/mem1.c afe2fbf6d7e8247c6c9f69c1481358b1cad60c08
+F src/mem2.c dfe802143189d491ae00f2c5aa50ce619d02f5bf
 F src/mutex.c 9cf641f556a4119ef90ed41b82f2d5647f81686e
-F src/os.c 86593b6e8cc22304d7c2d24b06c0aae49254b181
-F src/os.h 399c89cafa93b9ef35c3dc70f77644d10936b535
+F src/os.c 3b0d37208ea3ec9e1f913fbdeaf88841ed443b9d
+F src/os.h 2bfbbad126a775e4d8c7d59eb4d9585a5fd7dfb5
 F src/os_common.h a5c446d3b93f09f369d13bf217de4bed3437dd1c
 F src/os_os2.c 8769301bff502de642ad2634cedcb77d967ce199
 F src/os_os2.h c3f7d0af7e3453d1d7aa81b06c0a56f5a226530b
 F src/os_test.c 49833426101f99aee4bb5f6a44b7c4b2029fda1c
 F src/os_test.h 903c93554c23d88f34f667f1979e4a1cee792af3
-F src/os_unix.c 3ff776e03535b64df12dcc272a913a52d69f3e4a
+F src/os_unix.c c45b20f868fab1178710ea2f1c8043ce706d3a99
 F src/os_unix.h 5768d56d28240d3fe4537fac08cc85e4fb52279e
-F src/os_win.c 29c0e19c1072679a4c7818c49fab2f35d2ad7747
+F src/os_win.c 1cb94dd33d38e01de82d77bef107c7f3323463ec
 F src/os_win.h 41a946bea10f61c158ce8645e7646b29d44f122b
-F src/pager.c 0879439873a9da769ee400b3b8c0967afd786fe8
+F src/pager.c 89dfc6a0bd72898d147264517a43bdf35348dd2c
 F src/pager.h 53087c6fb9db01aed17c7fd044662a27507e89b8
 F src/parse.y 2d2ce439dc6184621fb0b86f4fc5aca7f391a590
 F src/pragma.c 9b989506a1b7c8aecd6befb8235e2f57a4aba7e5
 F src/prepare.c 29ea14cf6b0558f2f80aa53e112bff55f1119e36
-F src/printf.c 0f46bc3a805d5620f5aedfec1c3768d293a5ee5e
+F src/printf.c 33d23a68e498006136ca9770579cf2d14a7ec68e
 F src/random.c 4a22746501bf36b0a088c66e38dde5daba6a35da
 F src/select.c 98c367bce3f38c5adfcc97de9ab5c79b0e5dc2b2
 F src/server.c 087b92a39d883e3fa113cae259d64e4c7438bc96
 F src/shell.c ac29402b538515fa4697282387be9c1205e6e9eb
-F src/sqlite.h.in a1a5bc9e7e63bf73c2bb68be3749dec2bbd8cc44
+F src/sqlite.h.in 09a5256ee80dfc7cb4353739f78e4267be323574
 F src/sqlite3ext.h 9a26028378c288af500d8b94ed079666fed5806b
 F src/sqliteInt.h 951229c727f14f12f1c5555d2ed079bd2201415c
 F src/sqliteLimit.h f14609c27636ebc217c9603ade26dbdd7d0f6afa
@@ -136,7 +136,7 @@ F src/test2.c 4f742e99ed1bea5c14692f627bdb59a146f30504
 F src/test3.c a7d011c51d6b2e2a73c43983d5c2b731d69c74d7
 F src/test4.c c2c0f5dc907f1346f5d4b65eb5799f11eb9e4071
 F src/test5.c 3a6a5717a149d7ca2e6d14f5be72cf7555d54dc4
-F src/test6.c 5d6286568b12ec6c813cb30d2a14de8229f8e388
+F src/test6.c de2dbcd67401f00bfa0affc044ba671aa62384a5
 F src/test7.c a9d509d0e9ad214b4772696f49f6e61be26213d1
 F src/test8.c e6a543c8b248efe120ae33a6859fcd55dcf46a96
 F src/test9.c b46c8fe02ac7cca1a7316436d8d38d50c66f4b2f
@@ -146,7 +146,7 @@ F src/test_btree.c c1308ba0b88ab577fa56c9e493a09829dfcded9c
 F src/test_config.c f0b911bb615d93a192647e76910dce65cbbcf3ad
 F src/test_hexio.c 82916f918687502658f02533b519c38cb180db6d
 F src/test_loadext.c 22065d601a18878e5542191001f0eaa5d77c0ed8
-F src/test_malloc.c 9d5fb38bc0647ba9376d8d954be5b5aa01e12c80
+F src/test_malloc.c 5f5566bb799e72cb328df8933ef9fdb9d90d270e
 F src/test_md5.c 34599caee5b1c73dcf86ca31f55846fab8c19ef7
 F src/test_schema.c 12c9de7661d6294eec2d57afbb52e2af1128084f
 F src/test_server.c 319f6b1a99bab5f7149387442243d6e65a8ab4eb
@@ -160,12 +160,12 @@ F src/vacuum.c 318ccae7c4e3ddf241aeaee4d2611bfe1949a373
 F src/vdbe.c 9d4d00589c174aad9a616f1615464ddddebba0ec
 F src/vdbe.h 001c5b257567c1d3de7feb2203aac71d0d7b16a3
 F src/vdbeInt.h 39fb069ce04137545ca0bc790f80ddc64a8c99d9
-F src/vdbeapi.c 81cb7f018e56c20b40365f005ff69e1af9ea9494
-F src/vdbeaux.c 8b41802973560274c15acdc1ac1d4147c110e8d7
+F src/vdbeapi.c bdd0aea216744482dd1b7fab56de18ba5b6fbdf4
+F src/vdbeaux.c b040c3787ea1c32ba025b1c5822553469abe4efa
 F src/vdbeblob.c d12ed95dac0992e1e372d079d76af047cc42f7c7
 F src/vdbefifo.c 334c838c8f42d61a94813d136019ee566b5dc2f6
 F src/vdbemem.c 896fa3f8df9d2661eb15c7ce361857741b447268
-F src/vtab.c 6a7ce44edf7ad824d7e9307394121fe943bb419c
+F src/vtab.c 72e5347cca4d55e55e180015f4dc78736f852e14
 F src/where.c 2776a0caf8cbbfd6ec79cfb1cd9bc25074055e5e
 F tclinstaller.tcl 4356d9d94d2b5ed5e68f9f0c80c4df3048dd7617
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
@@ -238,7 +238,7 @@ F test/delete3.test 555e84a00a99230b7d049d477a324a631126a6ab
 F test/descidx1.test 2177c4ad55edcf56ad5f4c6490f307d7774e8a10
 F test/descidx2.test eb3a2882ec58aa6e1e8131d9bb54436e5b4a3ce2
 F test/descidx3.test 3a55b8d73bc3e9ad084e0da7fec781cf0d2a0356
-F test/diskfull.test a91fa95a8729b71fdac4738a49755f70b48c61f3
+F test/diskfull.test 34ef53e88372c5b5e488ad1581514559a224c2b1
 F test/distinctagg.test 2b89d1c5220d966a30ba4b40430338669301188b
 F test/enc.test e54531cd6bf941ee6760be041dff19a104c7acea
 F test/enc2.test 45710bacfa9df29720bc84c067dfdf8c8ddfb797
@@ -561,7 +561,7 @@ F www/tclsqlite.tcl 8be95ee6dba05eabcd27a9d91331c803f2ce2130
 F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
 F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
 F www/whentouse.tcl fc46eae081251c3c181bd79c5faef8195d7991a5
-P 6eb2d74a8cfce322930f05c97d4ec255f3711efb
-R 6c3888d041c9e4f3c4ea7193ec7eeec0
-U shess
-Z 0c8d40ad377805b9a794c415d7962113
+P 76f1e18ebc25d692f122784e87d202992c4cfed2
+R 72f6a976f09cdaf5e13abeade770ec1c
+U drh
+Z 8bcbe7ef9d6a537a157463bef713e3c1
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-76f1e18ebc25d692f122784e87d202992c4cfed2
+3a68fcddfa9184e4b310ce0a21312c54b9462ec8
--- a/src/btree.c
+++ b/src/btree.c
@@ -9,7 +9,7 @@
 **    May you share freely, never taking more than you give.
 **
 *************************************************************************
-** $Id: btree.c,v 1.410 2007/08/23 02:47:53 drh Exp $
+** $Id: btree.c,v 1.411 2007/08/24 03:51:33 drh Exp $
 **
 ** This file implements a external (disk-based) database using BTrees.
 ** See the header comment on "btreeInt.h" for additional information.
@@ -1102,13 +1102,6 @@ int sqlite3BtreeOpen(
  int nReserve;
  unsigned char zDbHeader[100];

-  if( pSqlite ){
-    pVfs = pSqlite->pVfs;
-  }else{
-    pVfs = sqlite3_vfs_find(0);
-  }
-  assert( sqlite3BtreeMutexHeld(pSqlite->mutex) );
-
  /* Set the variable isMemdb to true for an in-memory database, or 
  ** false for a file-based database. This symbol is only required if
  ** either of the shared-data or autovacuum features are compiled 
@@ -1122,6 +1115,13 @@ int sqlite3BtreeOpen(
  #endif
 #endif

+  if( pSqlite ){
+    pVfs = pSqlite->pVfs;
+  }else{
+    pVfs = sqlite3_vfs_find(0);
+  }
+  assert( sqlite3BtreeMutexHeld(pSqlite->mutex) );
+
  p = sqlite3MallocZero(sizeof(Btree));
  if( !p ){
    return SQLITE_NOMEM;
--- a/src/date.c
+++ b/src/date.c
@@ -16,7 +16,7 @@
 ** sqlite3RegisterDateTimeFunctions() found at the bottom of the file.
 ** All other code has file scope.
 **
-** $Id: date.c,v 1.71 2007/08/21 19:33:56 drh Exp $
+** $Id: date.c,v 1.72 2007/08/24 03:51:33 drh Exp $
 **
 ** SQLite processes all times and dates as Julian Day numbers.  The
 ** dates and times are stored as the number of days since noon
@@ -426,7 +426,7 @@ static double localtimeOffset(DateTime *p){
 #else
  {
    struct tm *pTm;
-    sqlite3_mutex_enter(sqlite3_mutex_alloc(SQLITE_MUTEX_GLOBAL));
+    sqlite3_mutex_enter(sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MASTER));
    pTm = localtime(&t);
    y.Y = pTm->tm_year + 1900;
    y.M = pTm->tm_mon + 1;
@@ -434,7 +434,7 @@ static double localtimeOffset(DateTime *p){
    y.h = pTm->tm_hour;
    y.m = pTm->tm_min;
    y.s = pTm->tm_sec;
-    sqlite3_mutex_leave(sqlite3_mutex_alloc(SQLITE_MUTEX_GLOBAL));
+    sqlite3_mutex_leave(sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MASTER));
  }
 #endif
  y.validYMD = 1;
--- a/src/main.c
+++ b/src/main.c
@@ -14,7 +14,7 @@
 ** other files are for internal use by SQLite and should not be
 ** accessed by users of the library.
 **
-** $Id: main.c,v 1.396 2007/08/22 20:18:22 drh Exp $
+** $Id: main.c,v 1.397 2007/08/24 03:51:34 drh Exp $
 */
 #include "sqliteInt.h"
 #include <ctype.h>
@@ -945,15 +945,16 @@ static int openDatabase(
  if( db==0 ) goto opendb_out;
  db->mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_RECURSIVE);
  if( db->mutex==0 ){
-    db->mallocFailed = 1;
+    sqlite3_free(db);
+    db = 0;
    goto opendb_out;
  }
  sqlite3_mutex_enter(db->mutex);
  db->pVfs = sqlite3_vfs_find(zVfs);
  db->errMask = 0xff;
  db->priorNewRowid = 0;
-  db->magic = SQLITE_MAGIC_BUSY;
  db->nDb = 2;
+  db->magic = SQLITE_MAGIC_BUSY;
  db->aDb = db->aDbStatic;
  db->autoCommit = 1;
  db->flags |= SQLITE_ShortColNames
@@ -1076,7 +1077,7 @@ static int openDatabase(
 #endif

 opendb_out:
-  if( db ){
+  if( db && db->mutex ){
    sqlite3_mutex_leave(db->mutex);
  }
  if( SQLITE_NOMEM==(rc = sqlite3_errcode(db)) ){
--- a/src/malloc.c
+++ b/src/malloc.c
@@ -12,7 +12,7 @@
 ** Memory allocation functions used throughout sqlite.
 **
 **
-** $Id: malloc.c,v 1.10 2007/08/22 20:18:22 drh Exp $
+** $Id: malloc.c,v 1.11 2007/08/24 03:51:34 drh Exp $
 */
 #include "sqliteInt.h"
 #include <stdarg.h>
@@ -25,8 +25,8 @@
 */
 static void softHeapLimitEnforcer(
  void *NotUsed, 
-  sqlite3_uint64 inUse,
-  unsigned int allocSize
+  sqlite3_int64 inUse,
+  int allocSize
 ){
  sqlite3_release_memory(allocSize);
 }
--- a/src/mem1.c
+++ b/src/mem1.c
@@ -12,7 +12,7 @@
 ** This file contains the C functions that implement a memory
 ** allocation subsystem for use by SQLite.  
 **
-** $Id: mem1.c,v 1.7 2007/08/22 20:18:22 drh Exp $
+** $Id: mem1.c,v 1.8 2007/08/24 03:51:34 drh Exp $
 */

 /*
@@ -51,8 +51,8 @@ static struct {
  ** issued.  The alarmBusy variable is set to prevent recursive
  ** callbacks.
  */
-  sqlite3_uint64 alarmThreshold;
-  void (*alarmCallback)(void*, sqlite3_uint64, unsigned);
+  sqlite3_int64 alarmThreshold;
+  void (*alarmCallback)(void*, sqlite3_int64,int);
  void *alarmArg;
  int alarmBusy;
  
@@ -64,22 +64,18 @@ static struct {
  /*
  ** Current allocation and high-water mark.
  */
-  sqlite3_uint64 nowUsed;
-  sqlite3_uint64 mxUsed;
+  sqlite3_int64 nowUsed;
+  sqlite3_int64 mxUsed;
  
 
-} mem = {  /* This variable holds all of the local data */
-   ((sqlite3_uint64)1)<<63,    /* alarmThreshold */
-   /* Everything else is initialized to zero */
-};
-
+} mem;


 /*
 ** Return the amount of memory currently checked out.
 */
-sqlite3_uint64 sqlite3_memory_used(void){
-  sqlite3_uint64 n;
+sqlite3_int64 sqlite3_memory_used(void){
+  sqlite3_int64 n;
  if( mem.mutex==0 ){
    mem.mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MEM);
  }
@@ -94,8 +90,8 @@ sqlite3_uint64 sqlite3_memory_used(void){
 ** checked out since either the beginning of this process
 ** or since the most recent reset.
 */
-sqlite3_uint64 sqlite3_memory_highwater(int resetFlag){
-  sqlite3_uint64 n;
+sqlite3_int64 sqlite3_memory_highwater(int resetFlag){
+  sqlite3_int64 n;
  if( mem.mutex==0 ){
    mem.mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MEM);
  }
@@ -112,9 +108,9 @@ sqlite3_uint64 sqlite3_memory_highwater(int resetFlag){
 ** Change the alarm callback
 */
 int sqlite3_memory_alarm(
-  void(*xCallback)(void *pArg, sqlite3_uint64 used, unsigned int N),
+  void(*xCallback)(void *pArg, sqlite3_int64 used,int N),
  void *pArg,
-  sqlite3_uint64 iThreshold
+  sqlite3_int64 iThreshold
 ){
  if( mem.mutex==0 ){
    mem.mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MEM);
@@ -130,9 +126,9 @@ int sqlite3_memory_alarm(
 /*
 ** Trigger the alarm 
 */
-static void sqlite3MemsysAlarm(unsigned nByte){
-  void (*xCallback)(void*,sqlite3_uint64,unsigned);
-  sqlite3_uint64 nowUsed;
+static void sqlite3MemsysAlarm(int nByte){
+  void (*xCallback)(void*,sqlite3_int64,int);
+  sqlite3_int64 nowUsed;
  void *pArg;
  if( mem.alarmCallback==0 || mem.alarmBusy  ) return;
  mem.alarmBusy = 1;
@@ -149,7 +145,7 @@ static void sqlite3MemsysAlarm(unsigned nByte){
 ** Allocate nBytes of memory
 */
 void *sqlite3_malloc(int nBytes){
-  sqlite3_uint64 *p;
+  sqlite3_int64 *p;
  if( nBytes<=0 ){
    return 0;
  }
@@ -157,7 +153,7 @@ void *sqlite3_malloc(int nBytes){
    mem.mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MEM);
  }
  sqlite3_mutex_enter(mem.mutex);
-  if( mem.nowUsed+nBytes>=mem.alarmThreshold ){
+  if( mem.alarmCallback!=0 && mem.nowUsed+nBytes>=mem.alarmThreshold ){
    sqlite3MemsysAlarm(nBytes);
  }
  p = malloc(nBytes+8);
@@ -181,15 +177,15 @@ void *sqlite3_malloc(int nBytes){
 ** Free memory.
 */
 void sqlite3_free(void *pPrior){
-  sqlite3_uint64 *p;
-  unsigned nByte;
+  sqlite3_int64 *p;
+  int nByte;
  if( pPrior==0 ){
    return;
  }
  assert( mem.mutex!=0 );
  p = pPrior;
  p--;
-  nByte = (unsigned int)*p;
+  nByte = (int)*p;
  sqlite3_mutex_enter(mem.mutex);
  mem.nowUsed -= nByte;
  free(p);
@@ -200,8 +196,8 @@ void sqlite3_free(void *pPrior){
 ** Change the size of an existing memory allocation
 */
 void *sqlite3_realloc(void *pPrior, int nBytes){
-  unsigned nOld;
-  sqlite3_uint64 *p;
+  int nOld;
+  sqlite3_int64 *p;
  if( pPrior==0 ){
    return sqlite3_malloc(nBytes);
  }
@@ -211,7 +207,7 @@ void *sqlite3_realloc(void *pPrior, int nBytes){
  }
  p = pPrior;
  p--;
-  nOld = (unsigned int)p[0];
+  nOld = (int)p[0];
  assert( mem.mutex!=0 );
  sqlite3_mutex_enter(mem.mutex);
  if( mem.nowUsed+nBytes-nOld>=mem.alarmThreshold ){
--- a/src/mem2.c
+++ b/src/mem2.c
@@ -12,7 +12,7 @@
 ** This file contains the C functions that implement a memory
 ** allocation subsystem for use by SQLite.  
 **
-** $Id: mem2.c,v 1.8 2007/08/23 02:47:53 drh Exp $
+** $Id: mem2.c,v 1.9 2007/08/24 03:51:34 drh Exp $
 */

 /*
@@ -71,11 +71,11 @@
 */
 struct MemBlockHdr {
  struct MemBlockHdr *pNext, *pPrev;  /* Linked list of all unfreed memory */
-  unsigned int iSize;                 /* Size of this allocation */
-  unsigned char nBacktrace;           /* Number of backtraces on this alloc */
-  unsigned char nBacktraceSlots;      /* Available backtrace slots */
-  unsigned short nTitle;              /* Bytes of title; includes '\0' */
-  unsigned int iForeGuard;            /* Guard word for sanity */
+  int iSize;                          /* Size of this allocation */
+  char nBacktrace;                    /* Number of backtraces on this alloc */
+  char nBacktraceSlots;               /* Available backtrace slots */
+  short nTitle;                       /* Bytes of title; includes '\0' */
+  int iForeGuard;                     /* Guard word for sanity */
 };

 /*
@@ -98,8 +98,8 @@ static struct {
  ** issued.  The alarmBusy variable is set to prevent recursive
  ** callbacks.
  */
-  sqlite3_uint64 alarmThreshold;
-  void (*alarmCallback)(void*, sqlite3_uint64, unsigned);
+  sqlite3_int64 alarmThreshold;
+  void (*alarmCallback)(void*, sqlite3_int64, int);
  void *alarmArg;
  int alarmBusy;
  
@@ -111,8 +111,8 @@ static struct {
  /*
  ** Current allocation and high-water mark.
  */
-  sqlite3_uint64 nowUsed;
-  sqlite3_uint64 mxUsed;
+  sqlite3_int64 nowUsed;
+  sqlite3_int64 mxUsed;
  
  /*
  ** Head and tail of a linked list of all outstanding allocations
@@ -147,18 +147,14 @@ static struct {
  int disallow; /* Do not allow memory allocation */
  
  
-} mem = {  /* This variable holds all of the local data */
-   ((sqlite3_uint64)1)<<63,    /* alarmThreshold */
-   /* Everything else is initialized to zero */
-};
-
+} mem;


 /*
 ** Return the amount of memory currently checked out.
 */
-sqlite3_uint64 sqlite3_memory_used(void){
-  sqlite3_uint64 n;
+sqlite3_int64 sqlite3_memory_used(void){
+  sqlite3_int64 n;
  if( mem.mutex==0 ){
    mem.mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MEM);
  }
@@ -173,8 +169,8 @@ sqlite3_uint64 sqlite3_memory_used(void){
 ** checked out since either the beginning of this process
 ** or since the most recent reset.
 */
-sqlite3_uint64 sqlite3_memory_highwater(int resetFlag){
-  sqlite3_uint64 n;
+sqlite3_int64 sqlite3_memory_highwater(int resetFlag){
+  sqlite3_int64 n;
  if( mem.mutex==0 ){
    mem.mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MEM);
  }
@@ -191,9 +187,9 @@ sqlite3_uint64 sqlite3_memory_highwater(int resetFlag){
 ** Change the alarm callback
 */
 int sqlite3_memory_alarm(
-  void(*xCallback)(void *pArg, sqlite3_uint64 used, unsigned int N),
+  void(*xCallback)(void *pArg, sqlite3_int64 used, int N),
  void *pArg,
-  sqlite3_uint64 iThreshold
+  sqlite3_int64 iThreshold
 ){
  if( mem.mutex==0 ){
    mem.mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MEM);
@@ -209,9 +205,9 @@ int sqlite3_memory_alarm(
 /*
 ** Trigger the alarm 
 */
-static void sqlite3MemsysAlarm(unsigned nByte){
-  void (*xCallback)(void*,sqlite3_uint64,unsigned);
-  sqlite3_uint64 nowUsed;
+static void sqlite3MemsysAlarm(int nByte){
+  void (*xCallback)(void*,sqlite3_int64,int);
+  sqlite3_int64 nowUsed;
  void *pArg;
  if( mem.alarmCallback==0 || mem.alarmBusy  ) return;
  mem.alarmBusy = 1;
@@ -232,14 +228,14 @@ static void sqlite3MemsysAlarm(unsigned nByte){
 */
 static struct MemBlockHdr *sqlite3MemsysGetHeader(void *pAllocation){
  struct MemBlockHdr *p;
-  unsigned int *pInt;
+  int *pInt;

  p = (struct MemBlockHdr*)pAllocation;
  p--;
  assert( p->iForeGuard==FOREGUARD );
  assert( (p->iSize & 3)==0 );
-  pInt = (unsigned int*)pAllocation;
-  assert( pInt[p->iSize/sizeof(unsigned int)]==REARGUARD );
+  pInt = (int*)pAllocation;
+  assert( pInt[p->iSize/sizeof(int)]==REARGUARD );
  return p;
 }

@@ -260,9 +256,9 @@ void *sqlite3_malloc(int nByte){
  struct MemBlockHdr *pHdr;
  void **pBt;
  char *z;
-  unsigned int *pInt;
+  int *pInt;
  void *p;
-  unsigned int totalSize;
+  int totalSize;

  if( nByte<=0 ){
    return 0;
@@ -272,11 +268,11 @@ void *sqlite3_malloc(int nByte){
  }
  sqlite3_mutex_enter(mem.mutex);
  assert( mem.disallow==0 );
-  if( mem.nowUsed+nByte>=mem.alarmThreshold ){
+  if( mem.alarmCallback!=0 && mem.nowUsed+nByte>=mem.alarmThreshold ){
    sqlite3MemsysAlarm(nByte);
  }
  nByte = (nByte+3)&~3;
-  totalSize = nByte + sizeof(*pHdr) + sizeof(unsigned int) +
+  totalSize = nByte + sizeof(*pHdr) + sizeof(int) +
               mem.nBacktrace*sizeof(void*) + mem.nTitle;
  if( mem.iFail>0 ){
    if( mem.iFail==1 ){
@@ -323,8 +319,8 @@ void *sqlite3_malloc(int nByte){
      memcpy(z, mem.zTitle, mem.nTitle);
    }
    pHdr->iSize = nByte;
-    pInt = (unsigned int *)&pHdr[1];
-    pInt[nByte/sizeof(unsigned int)] = REARGUARD;
+    pInt = (int*)&pHdr[1];
+    pInt[nByte/sizeof(int)] = REARGUARD;
    memset(pInt, 0x65, nByte);
    mem.nowUsed += nByte;
    if( mem.nowUsed>mem.mxUsed ){
@@ -369,7 +365,7 @@ void sqlite3_free(void *pPrior){
  z = (char*)pBt;
  z -= pHdr->nTitle;
  memset(z, 0x2b, sizeof(void*)*pHdr->nBacktraceSlots + sizeof(*pHdr) +
-                  pHdr->iSize + sizeof(unsigned int) + pHdr->nTitle);
+                  pHdr->iSize + sizeof(int) + pHdr->nTitle);
  free(z);
  sqlite3_mutex_leave(mem.mutex);  
 }
@@ -488,15 +484,6 @@ int sqlite3_memdebug_fail(int iFail, int iRepeat){
  return n;
 }

-/*
-** This routine returns the number of successful mallocs remaining until
-** the next simulated malloc failure.  -1 is returned if no simulated
-** failure is currently scheduled.
-*/
-int sqlite3_memdebug_pending(void){
-  return mem.iFail-1;
-}
-
 /*
 ** The following two routines are used to assert that no memory
 ** allocations occur between one call and the next.  The use of
--- a/src/os.c
+++ b/src/os.c
@@ -110,40 +110,40 @@ int sqlite3OsOpen(
  int flags, 
  int *pFlagsOut
 ){
-  return pVfs->xOpen(pVfs->pAppData, zPath, pFile, flags, pFlagsOut);
+  return pVfs->xOpen(pVfs, zPath, pFile, flags, pFlagsOut);
 }
 int sqlite3OsDelete(sqlite3_vfs *pVfs, const char *zPath, int dirSync){
-  return pVfs->xDelete(pVfs->pAppData, zPath, dirSync);
+  return pVfs->xDelete(pVfs, zPath, dirSync);
 }
 int sqlite3OsAccess(sqlite3_vfs *pVfs, const char *zPath, int flags){
-  return pVfs->xAccess(pVfs->pAppData, zPath, flags);
+  return pVfs->xAccess(pVfs, zPath, flags);
 }
 int sqlite3OsGetTempName(sqlite3_vfs *pVfs, char *zBufOut){
-  return pVfs->xGetTempName(pVfs->pAppData, zBufOut);
+  return pVfs->xGetTempName(pVfs, zBufOut);
 }
 int sqlite3OsFullPathname(sqlite3_vfs *pVfs, const char *zPath, char *zPathOut){
-  return pVfs->xFullPathname(pVfs->pAppData, zPath, zPathOut);
+  return pVfs->xFullPathname(pVfs, zPath, zPathOut);
 }
 void *sqlite3OsDlOpen(sqlite3_vfs *pVfs, const char *zPath){
-  return pVfs->xDlOpen(pVfs->pAppData, zPath);
+  return pVfs->xDlOpen(pVfs, zPath);
 }
 void sqlite3OsDlError(sqlite3_vfs *pVfs, int nByte, char *zBufOut){
-  pVfs->xDlError(pVfs->pAppData, nByte, zBufOut);
+  pVfs->xDlError(pVfs, nByte, zBufOut);
 }
 void *sqlite3OsDlSym(sqlite3_vfs *pVfs, void *pHandle, const char *zSymbol){
-  return pVfs->xDlSym(pHandle, zSymbol);
+  return pVfs->xDlSym(pVfs, pHandle, zSymbol);
 }
 void sqlite3OsDlClose(sqlite3_vfs *pVfs, void *pHandle){
-  pVfs->xDlClose(pHandle);
+  pVfs->xDlClose(pVfs, pHandle);
 }
 int sqlite3OsRandomness(sqlite3_vfs *pVfs, int nByte, char *zBufOut){
-  return pVfs->xRandomness(pVfs->pAppData, nByte, zBufOut);
+  return pVfs->xRandomness(pVfs, nByte, zBufOut);
 }
 int sqlite3OsSleep(sqlite3_vfs *pVfs, int nMicro){
-  return pVfs->xSleep(pVfs->pAppData, nMicro);
+  return pVfs->xSleep(pVfs, nMicro);
 }
 int sqlite3OsCurrentTime(sqlite3_vfs *pVfs, double *pTimeOut){
-  return pVfs->xCurrentTime(pVfs->pAppData, pTimeOut);
+  return pVfs->xCurrentTime(pVfs, pTimeOut);
 }

 int sqlite3OsOpenMalloc(
@@ -176,14 +176,11 @@ int sqlite3OsCloseFree(sqlite3_file *pFile){
 }

 /*
-** Default vfs implementation. Defined by the various os_X.c implementations.
+** The list of all registered VFS implementations.  This list is
+** initialized to the single VFS returned by sqlite3OsDefaultVfs()
+** upon the first call to sqlite3_vfs_find().
 */
-extern sqlite3_vfs sqlite3DefaultVfs;
-
-/*
-** The list of all registered VFS implementations.
-*/
-static sqlite3_vfs *vfsList = &sqlite3DefaultVfs;
+static sqlite3_vfs *vfsList = 0;

 /*
 ** Locate a VFS by name.  If no name is given, simply return the
@@ -192,7 +189,12 @@ static sqlite3_vfs *vfsList = &sqlite3DefaultVfs;
 sqlite3_vfs *sqlite3_vfs_find(const char *zVfs){
  sqlite3_mutex *mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MASTER);
  sqlite3_vfs *pVfs;
+  static int isInit = 0;
  sqlite3_mutex_enter(mutex);
+  if( !isInit ){
+    vfsList = sqlite3OsDefaultVfs();
+    isInit = 1;
+  }
  for(pVfs = vfsList; pVfs; pVfs=pVfs->pNext){
    if( zVfs==0 ) break;
    if( strcmp(zVfs, pVfs->zName)==0 ) break;
@@ -217,7 +219,7 @@ int sqlite3_vfs_release(sqlite3_vfs *pVfs){
  sqlite3_mutex_enter(mutex);
  assert( pVfs->nRef>0 );
  pVfs->nRef--;
-  if( pVfs->nRef==0 ){
+  if( pVfs->nRef==0 && pVfs->vfsMutex ){
    sqlite3_mutex_free(pVfs->vfsMutex);
    pVfs->vfsMutex = 0;
  }
--- a/src/os.h
+++ b/src/os.h
@@ -109,7 +109,7 @@
 ** If sqlite is being embedded in another program, you may wish to change the
 ** prefix to reflect your program's name, so that if your program exits
 ** prematurely, old temporary files can be easily identified. This can be done
-** using -DTEMP_FILE_PREFIX=myprefix_ on the compiler command line.
+** using -DSQLITE_TEMP_FILE_PREFIX=myprefix_ on the compiler command line.
 **
 ** 2006-10-31:  The default prefix used to be "sqlite_".  But then
 ** Mcafee started using SQLite in their anti-virus product and it
@@ -123,8 +123,8 @@
 ** enough to know that calling the developer will not help get rid
 ** of the file.
 */
-#ifndef TEMP_FILE_PREFIX
-# define TEMP_FILE_PREFIX "etilqs_"
+#ifndef SQLITE_TEMP_FILE_PREFIX
+# define SQLITE_TEMP_FILE_PREFIX "etilqs_"
 #endif

 /*
@@ -273,4 +273,18 @@ int sqlite3OsCloseFree(sqlite3_file *);
  int sqlite3OsLockState(sqlite3_file *id);
 #endif

+/*
+** Each OS-specific backend defines an instance of the following
+** structure for returning a pointer to its sqlite3_vfs.  If OS_OTHER
+** is defined (meaning that the application-defined OS interface layer
+** is used) then there is no default VFS.   The application must
+** register one or more VFS structures using sqlite3_vfs_register()
+** before attempting to use SQLite.
+*/
+#if OS_UNIX || OS_WIN || OS_OS2
+sqlite3_vfs *sqlite3OsDefaultVfs(void);
+#else
+# define sqlite3OsDefaultVfs(X) 0
+#endif
+
 #endif /* _SQLITE_OS_H_ */
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -108,13 +108,6 @@ struct unixFile {
 */
 #include "os_common.h"

-/*
-** Do not include any of the File I/O interface procedures if the
-** SQLITE_OMIT_DISKIO macro is defined (indicating that the database
-** will be in-memory only)
-*/
-#ifndef SQLITE_OMIT_DISKIO
-
 /*
 ** Define various macros that are missing from some systems.
 */
@@ -2300,12 +2293,6 @@ static int fillInUnixFile(
 }
 #endif /* SQLITE_ENABLE_LOCKING_STYLE */

-#endif /* SQLITE_OMIT_DISKIO */
-/***************************************************************************
-** Everything above deals with file I/O.  Everything that follows deals
-** with other miscellanous aspects of the operating system interface
-****************************************************************************/
-
 /*
 ** Open a file descriptor to the directory containing file zFilename.
 ** If successful, *pFd is set to the opened file descriptor and
@@ -2321,8 +2308,7 @@ static int openDirectory(const char *zFilename, int *pFd){
  int fd;
  char zDirname[MAX_PATHNAME+1];

-  strncpy(zDirname, zFilename, MAX_PATHNAME);
-  zDirname[MAX_PATHNAME-1] = '\0';
+  sqlite3_snprintf(MAX_PATHNAME, zDirname, "%s", zFilename);
  for(ii=strlen(zDirname); ii>=0 && zDirname[ii]!='/'; ii--);
  if( ii>0 ){
    zDirname[ii] = '\0';
@@ -2361,7 +2347,7 @@ static int openDirectory(const char *zFilename, int *pFd){
 ** OpenExclusive().
 */
 static int unixOpen(
-  void *pNotUsed, 
+  sqlite3_vfs *pVfs, 
  const char *zPath, 
  sqlite3_file *pFile,
  int flags,
@@ -2414,7 +2400,7 @@ static int unixOpen(
    /* Failed to open the file for read/write access. Try read-only. */
    flags &= ~(SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE);
    flags |= SQLITE_OPEN_READONLY;
-    return unixOpen(pNotUsed, zPath, pFile, flags, pOutFlags);
+    return unixOpen(pVfs, zPath, pFile, flags, pOutFlags);
  }
  if( fd<0 ){
    return SQLITE_CANTOPEN;
@@ -2441,7 +2427,7 @@ static int unixOpen(
 ** Delete the file at zPath. If the dirSync argument is true, fsync()
 ** the directory after deleting the file.
 */
-static int unixDelete(void *pNotUsed, const char *zPath, int dirSync){
+static int unixDelete(sqlite3_vfs *pVfs, const char *zPath, int dirSync){
  int rc = SQLITE_OK;
  SimulateIOError(return SQLITE_IOERR_DELETE);
  unlink(zPath);
@@ -2468,7 +2454,7 @@ static int unixDelete(void *pNotUsed, const char *zPath, int dirSync){
 **
 ** Otherwise return 0.
 */
-static int unixAccess(void *pNotUsed, const char *zPath, int flags){
+static int unixAccess(sqlite3_vfs *pVfs, const char *zPath, int flags){
  int amode;
  switch( flags ){
    case SQLITE_ACCESS_EXISTS:
@@ -2488,10 +2474,11 @@ static int unixAccess(void *pNotUsed, const char *zPath, int flags){
 }

 /*
-** Create a temporary file name in zBuf.  zBuf must be big enough to
-** hold at least MAX_PATHNAME characters.
+** Create a temporary file name in zBuf.  zBuf must be allocated
+** by the calling process and must be big enough to hold at least
+** pVfs->mxPathname bytes.
 */
-static int unixGetTempName(void *pNotUsed, char *zBuf){
+static int unixGetTempName(sqlite3_vfs *pVfs, char *zBuf){
  static const char *azDirs[] = {
     0,
     "/var/tmp",
@@ -2516,7 +2503,8 @@ static int unixGetTempName(void *pNotUsed, char *zBuf){
    break;
  }
  do{
-    sqlite3_snprintf(MAX_PATHNAME-17, zBuf, "%s/"TEMP_FILE_PREFIX, zDir);
+    assert( pVfs->mxPathname==MAX_PATHNAME );
+    sqlite3_snprintf(MAX_PATHNAME-17, zBuf, "%s/"SQLITE_TEMP_FILE_PREFIX, zDir);
    j = strlen(zBuf);
    sqlite3Randomness(15, &zBuf[j]);
    for(i=0; i<15; i++, j++){
@@ -2537,18 +2525,18 @@ static int unixGetTempName(void *pNotUsed, char *zBuf){
 ** (in this case, MAX_PATHNAME bytes). The full-path is written to
 ** this buffer before returning.
 */
-static int unixFullPathname(void *pNotUsed, const char *zPath, char *zOut){
+static int unixFullPathname(sqlite3_vfs *pVfs, const char *zPath, char *zOut){
+  assert( pVfs->mxPathname==MAX_PATHNAME );
  zOut[MAX_PATHNAME-1] = '\0';
  if( zPath[0]=='/' ){
-    strncpy(zOut, zPath, MAX_PATHNAME-1);
+    sqlite3_snprintf(MAX_PATHNAME, zOut, "%s", zPath);
  }else{
    int nCwd;
    if( getcwd(zOut, MAX_PATHNAME-1)==0 ){
      return SQLITE_ERROR;
    }
    nCwd = strlen(zOut);
-    zOut[nCwd] = '/';
-    strncpy(&zOut[nCwd+1], zPath, MAX_PATHNAME-1-nCwd-1);
+    sqlite3_snprintf(MAX_PATHNAME-nCwd, &zOut[nCwd], "/%s", zPath);
  }
  return SQLITE_OK;

@@ -2586,25 +2574,24 @@ static int unixFullPathname(void *pNotUsed, const char *zPath, char *zOut){
 ** within the shared library, and closing the shared library.
 */
 #include <dlfcn.h>
-static void *unixDlOpen(void *pNotUsed, const char *zFilename){
+static void *unixDlOpen(sqlite3_vfs *pVfs, const char *zFilename){
  return dlopen(zFilename, RTLD_NOW | RTLD_GLOBAL);
 }
-static void unixDlError(void *pNotUsed, int nBuf, char *zBufOut){
+static void unixDlError(sqlite3_vfs *pVfs, int nBuf, char *zBufOut){
  char *zErr;
  enterMutex();
  zErr = dlerror();
  if( zErr ){
-    strncpy(zBufOut, zErr, nBuf-1);
-    zBufOut[nBuf-1] = '\0';
+    sqlite3_snprintf(nBuf, zBufOut, "%s", zErr);
  }else if(nBuf>0) {
    zBufOut[0] = '\0';
  }
  leaveMutex();
 }
-void *unixDlSym(void *pHandle, const char *zSymbol){
+void *unixDlSym(sqlite3_vfs *pVfs, void *pHandle, const char *zSymbol){
  return dlsym(pHandle, zSymbol);
 }
-void unixDlClose(void *pHandle){
+void unixDlClose(sqlite3_vfs *pVfs, void *pHandle){
  dlclose(pHandle);
 }
 #else /* if SQLITE_OMIT_LOAD_EXTENSION is defined: */
@@ -2617,7 +2604,7 @@ void unixDlClose(void *pHandle){
 /*
 ** Write nBuf bytes of random data to the supplied buffer zBuf.
 */
-static int unixRandomness(void *pNotUsed, int nBuf, char *zBuf){
+static int unixRandomness(sqlite3_vfs *pVfs, int nBuf, char *zBuf){

  assert(nBuf>=(sizeof(time_t)+sizeof(int)));

@@ -2662,7 +2649,7 @@ static int unixRandomness(void *pNotUsed, int nBuf, char *zBuf){
 ** might be greater than or equal to the argument, but not less
 ** than the argument.
 */
-static int unixSleep(void *pNotUsed, int microseconds){
+static int unixSleep(sqlite3_vfs *pVfs, int microseconds){
 #if defined(HAVE_USLEEP) && HAVE_USLEEP
  usleep(microseconds);
  return microseconds;
@@ -2686,7 +2673,7 @@ int sqlite3_current_time = 0;
 ** current time and date as a Julian Day number into *prNow and
 ** return 0.  Return 1 if the time and date cannot be found.
 */
-static int unixCurrentTime(void *pNotUsed, double *prNow){
+static int unixCurrentTime(sqlite3_vfs *pVfs, double *prNow){
 #ifdef NO_GETTOD
  time_t t;
  time(&t);
@@ -2704,8 +2691,14 @@ static int unixCurrentTime(void *pNotUsed, double *prNow){
  return 0;
 }

-
-sqlite3_vfs sqlite3DefaultVfs = {
+/*
+** Return a pointer to the sqlite3DefaultVfs structure.   We use
+** a function rather than give the structure global scope because
+** some compilers (MSVC) do not allow forward declarations of
+** initialized structures.
+*/
+sqlite3_vfs *sqlite3OsDefaultVfs(void){
+  static sqlite3_vfs unixVfs = {
    1,                  /* iVersion */
    sizeof(unixFile),   /* szOsFile */
    MAX_PATHNAME,       /* mxPathname */
@@ -2727,6 +2720,9 @@ sqlite3_vfs sqlite3DefaultVfs = {
    unixRandomness,     /* xRandomness */
    unixSleep,          /* xSleep */
    unixCurrentTime     /* xCurrentTime */
-};
+  };
+  
+  return &unixVfs;
+}
 
 #endif /* OS_UNIX */
--- a/src/os_win.c
+++ b/src/os_win.c
--- a/src/pager.c
+++ b/src/pager.c
@@ -18,7 +18,7 @@
 ** file simultaneously, or one process from reading the database while
 ** another is writing.
 **
-** @(#) $Id: pager.c,v 1.371 2007/08/23 14:48:24 danielk1977 Exp $
+** @(#) $Id: pager.c,v 1.372 2007/08/24 03:51:34 drh Exp $
 */
 #ifndef SQLITE_OMIT_DISKIO
 #include "sqliteInt.h"
@@ -1873,7 +1873,6 @@ int sqlite3PagerOpen(
 ){
  u8 *pPtr;
  Pager *pPager = 0;
-  char *zFullPathname = 0;
  int rc = SQLITE_OK;
  int i;
  int tempFile = 0;
@@ -1905,8 +1904,7 @@ int sqlite3PagerOpen(
  pPager->zJournal = &pPager->zDirectory[pVfs->mxPathname];
  pPager->pVfs = pVfs;

-  /* Open the pager file and set zFullPathname to point at malloc()ed 
-  ** memory containing the complete filename (i.e. including the directory).
+  /* Open the pager file.
  */
  if( zFilename && zFilename[0] ){
 #ifndef SQLITE_OMIT_MEMORYDB
@@ -1942,9 +1940,9 @@ int sqlite3PagerOpen(
    pPager->pTmpSpace = (char *)sqlite3_malloc(SQLITE_DEFAULT_PAGE_SIZE);
  }

-  /* If an error occured in either of the blocks above, free the memory 
-  ** pointed to by zFullPathname, free the Pager structure and close the 
-  ** file. Since the pager is not allocated there is no need to set 
+  /* If an error occured in either of the blocks above.
+  ** Free the Pager structure and close the file.
+  ** Since the pager is not allocated there is no need to set 
  ** any Pager.errMask variables.
  */
  if( !pPager || !pPager->pTmpSpace ){
@@ -1953,8 +1951,8 @@ int sqlite3PagerOpen(
    return ((rc==SQLITE_OK)?SQLITE_NOMEM:rc);
  }

-  PAGERTRACE3("OPEN %d %s\n", FILEHANDLEID(pPager->fd), zFullPathname);
-  IOTRACE(("OPEN %p %s\n", pPager, zFullPathname))
+  PAGERTRACE3("OPEN %d %s\n", FILEHANDLEID(pPager->fd), pPager->zFilename);
+  IOTRACE(("OPEN %p %s\n", pPager, pPager->zFilename))

  /* Fill in Pager.zDirectory[] */
  memcpy(pPager->zDirectory, pPager->zFilename, pVfs->mxPathname);
@@ -2682,6 +2680,7 @@ static PgHdr *sort_pagelist(PgHdr *pIn){
 */
 static int pager_write_pagelist(PgHdr *pList){
  Pager *pPager;
+  PgHdr *p;
  int rc;

  if( pList==0 ) return SQLITE_OK;
@@ -2709,6 +2708,10 @@ static int pager_write_pagelist(PgHdr *pList){
  }

  pList = sort_pagelist(pList);
+  for(p=pList; p; p=p->pDirty){
+    assert( p->dirty );
+    p->dirty = 0;
+  }
  while( pList ){

    /* If the file has not yet been opened, open it now. */
@@ -2718,7 +2721,6 @@ static int pager_write_pagelist(PgHdr *pList){
      if( rc ) return rc;
    }

-    assert( pList->dirty );
    /* If there are dirty pages in the page cache with page numbers greater
    ** than Pager.dbSize, this means sqlite3PagerTruncate() was called to
    ** make the file smaller (presumably by auto-vacuum code). Do not write
@@ -2743,7 +2745,6 @@ static int pager_write_pagelist(PgHdr *pList){
    }
 #endif
    if( rc ) return rc;
-    pList->dirty = 0;
 #ifdef SQLITE_CHECK_PAGES
    pList->pageHash = pager_pagehash(pList);
 #endif
@@ -2846,6 +2847,7 @@ static int pager_recycle(Pager *pPager, int syncOk, PgHdr **ppPg){
    pPg->dirty = 1;
    pPg->pDirty = 0;
    rc = pager_write_pagelist( pPg );
+    pPg->dirty = 0;
    if( rc!=SQLITE_OK ){
      return rc;
    }
@@ -3698,11 +3700,14 @@ static void makeClean(PgHdr *pPg){
  if( pPg->dirty ){
    pPg->dirty = 0;
    if( pPg->pDirty ){
+      assert( pPg->pDirty->pPrevDirty==pPg );
      pPg->pDirty->pPrevDirty = pPg->pPrevDirty;
    }
    if( pPg->pPrevDirty ){
+      assert( pPg->pPrevDirty->pDirty==pPg );
      pPg->pPrevDirty->pDirty = pPg->pDirty;
    }else{
+      assert( pPg->pPager->pDirty==pPg );
      pPg->pPager->pDirty = pPg->pDirty;
    }
  }
@@ -4263,7 +4268,11 @@ int sqlite3PagerCommitPhaseOne(Pager *pPager, const char *zMaster, Pgno nTrunc){
    /* Write all dirty pages to the database file */
    pPg = pager_get_all_dirty_pages(pPager);
    rc = pager_write_pagelist(pPg);
-    if( rc!=SQLITE_OK ) goto sync_exit;
+    if( rc!=SQLITE_OK ){
+      while( pPg && !pPg->dirty ){ pPg = pPg->pDirty; }
+      pPager->pDirty = pPg;
+      goto sync_exit;
+    }
    pPager->pDirty = 0;

    /* Sync the database file. */
--- a/src/printf.c
+++ b/src/printf.c
@@ -113,7 +113,7 @@ static const et_info fmtinfo[] = {
  {  'd', 10, 1, etRADIX,      0,  0 },
  {  's',  0, 4, etSTRING,     0,  0 },
  {  'g',  0, 1, etGENERIC,    30, 0 },
-  {  'z',  0, 6, etDYNSTRING,  0,  0 },
+  {  'z',  0, 4, etDYNSTRING,  0,  0 },
  {  'q',  0, 4, etSQLESCAPE,  0,  0 },
  {  'Q',  0, 4, etSQLESCAPE2, 0,  0 },
  {  'w',  0, 4, etSQLESCAPE3, 0,  0 },
--- a/src/sqlite.h.in
+++ b/src/sqlite.h.in
@@ -30,7 +30,7 @@
 ** the version number) and changes its name to "sqlite3.h" as
 ** part of the build process.
 **
-** @(#) $Id: sqlite.h.in,v 1.238 2007/08/23 02:47:53 drh Exp $
+** @(#) $Id: sqlite.h.in,v 1.239 2007/08/24 03:51:34 drh Exp $
 */
 #ifndef _SQLITE3_H_
 #define _SQLITE3_H_
@@ -339,10 +339,10 @@ int sqlite3_exec(
 #define SQLITE_OPEN_EXCLUSIVE        0x00000010
 #define SQLITE_OPEN_MAIN_DB          0x00000100
 #define SQLITE_OPEN_TEMP_DB          0x00000200
-#define SQLITE_OPEN_MAIN_JOURNAL     0x00000300
-#define SQLITE_OPEN_TEMP_JOURNAL     0x00000400
-#define SQLITE_OPEN_SUBJOURNAL       0x00000500
-#define SQLITE_OPEN_MASTER_JOURNAL   0x00000600
+#define SQLITE_OPEN_MAIN_JOURNAL     0x00000400
+#define SQLITE_OPEN_TEMP_JOURNAL     0x00000800
+#define SQLITE_OPEN_SUBJOURNAL       0x00001000
+#define SQLITE_OPEN_MASTER_JOURNAL   0x00002000

 /*
 ** CAPI3REF: Device Characteristics
@@ -424,7 +424,7 @@ int sqlite3_exec(
 */
 typedef struct sqlite3_file sqlite3_file;
 struct sqlite3_file {
-  struct sqlite3_io_methods *pMethods;  /* Methods against the open file */
+  const struct sqlite3_io_methods *pMethods;  /* Methods for an open file */
 };

 /*
@@ -552,10 +552,10 @@ typedef struct sqlite3_mutex sqlite3_mutex;
 ** nRef transitions from 1 to 0.
 **
 ** Registered vfs modules are kept on a linked list formed by
-** the pNext and pPrev pointers.  The [sqlite3_register_vfs()]
+** the pNext pointer.  The [sqlite3_register_vfs()]
 ** and [sqlite3_unregister_vfs()] interfaces manage this list
-** in a thread-safe way.  The [sqlite3_acquire_vfs()] searches the
-** list.
+** in a thread-safe way.  The [sqlite3_find_vfs()] interface
+** searches the list.
 **
 ** The zName field holds the name of the VFS module.  The name must
 ** be unique across all VFS modules.
@@ -644,19 +644,19 @@ struct sqlite3_vfs {
  sqlite3_vfs *pNext;      /* Next registered VFS */
  const char *zName;       /* Name of this virtual file system */
  void *pAppData;          /* Application context */
-  int (*xOpen)(void *pAppData, const char *zName, sqlite3_file*,
+  int (*xOpen)(sqlite3_vfs*, const char *zName, sqlite3_file*,
               int flags, int *pOutFlags);
-  int (*xDelete)(void *pAppData, const char *zName, int syncDir);
-  int (*xAccess)(void *pAppData, const char *zName, int flags);
-  int (*xGetTempName)(void *pAppData, char *zOut);
-  int (*xFullPathname)(void *pAppData, const char *zName, char *zOut);
-  void *(*xDlOpen)(void *pAppData, const char *zFilename);
-  void (*xDlError)(void *pAppData, int nByte, char *zErrMsg);
-  void *(*xDlSym)(void*, const char *zSymbol);
-  void (*xDlClose)(void*);
-  int (*xRandomness)(void *pAppData, int nByte, char *zOut);
-  int (*xSleep)(void *pAppData, int microseconds);
-  int (*xCurrentTime)(void *pAppData, double*);
+  int (*xDelete)(sqlite3_vfs*, const char *zName, int syncDir);
+  int (*xAccess)(sqlite3_vfs*, const char *zName, int flags);
+  int (*xGetTempName)(sqlite3_vfs*, char *zOut);
+  int (*xFullPathname)(sqlite3_vfs*, const char *zName, char *zOut);
+  void *(*xDlOpen)(sqlite3_vfs*, const char *zFilename);
+  void (*xDlError)(sqlite3_vfs*, int nByte, char *zErrMsg);
+  void *(*xDlSym)(sqlite3_vfs*,void*, const char *zSymbol);
+  void (*xDlClose)(sqlite3_vfs*, void*);
+  int (*xRandomness)(sqlite3_vfs*, int nByte, char *zOut);
+  int (*xSleep)(sqlite3_vfs*, int microseconds);
+  int (*xCurrentTime)(sqlite3_vfs*, double*);
  /* New fields may be appended in figure versions.  The iVersion
  ** value will increment whenever this happens. */
 };
@@ -997,7 +997,7 @@ void sqlite3_free_table(char **result);
 ** These routines all implement some additional formatting
 ** options that are useful for constructing SQL statements.
 ** All of the usual printf formatting options apply.  In addition, there
-** is are "%q" and "%Q" options.
+** is are "%q", "%Q", and "%z" options.
 **
 ** The %q option works like %s in that it substitutes a null-terminated
 ** string from the argument list.  But %q also doubles every '\'' character.
@@ -1050,6 +1050,10 @@ void sqlite3_free_table(char **result);
 **
 ** The code above will render a correct SQL statement in the zSQL
 ** variable even if the zText variable is a NULL pointer.
+**
+** The "%z" formatting option works exactly like "%s" with the
+** addition that after the string has been read and copied into
+** the result, [sqlite3_free()] is called on the input string.
 */
 char *sqlite3_mprintf(const char*,...);
 char *sqlite3_vmprintf(const char*, va_list);
@@ -1092,8 +1096,8 @@ void sqlite3_free(void*);
 ** are provided by the default memory subsystem for diagnostic
 ** purposes.
 */
-sqlite3_uint64 sqlite3_memory_used(void);
-sqlite3_uint64 sqlite3_memory_highwater(int resetFlag);
+sqlite3_int64 sqlite3_memory_used(void);
+sqlite3_int64 sqlite3_memory_highwater(int resetFlag);

 /*
 ** CAPI3REF: Memory Allocation Alarms
@@ -1124,9 +1128,9 @@ sqlite3_uint64 sqlite3_memory_highwater(int resetFlag);
 ** [sqlite3_soft_heap_limit()] module.
 */
 int sqlite3_memory_alarm(
-  void(*xCallback)(void *pArg, sqlite3_uint64 used, unsigned int N),
+  void(*xCallback)(void *pArg, sqlite3_int64 used, int N),
  void *pArg,
-  sqlite3_uint64 iThreshold
+  sqlite3_int64 iThreshold
 );


--- a/src/test6.c
+++ b/src/test6.c
@@ -678,7 +678,7 @@ static int crashParamsObjCmd(
 ){
  int iDelay;
  const char *zCrashFile;
-  int nCrashFile;
+  int nCrashFile, iDc, iSectorSize;

  static sqlite3_vfs crashVfs = {
    1,                  /* iVersion */
@@ -704,6 +704,7 @@ static int crashParamsObjCmd(
    cfCurrentTime         /* xCurrentTime */
  };

+
  if( crashVfs.pAppData==0 ){
    sqlite3_vfs *pOriginalVfs = sqlite3_vfs_find(0);
    crashVfs.xDlError = pOriginalVfs->xDlError;
@@ -717,8 +718,8 @@ static int crashParamsObjCmd(
    sqlite3_vfs_register(&crashVfs, 1);
  }

-  int iDc = -1;
-  int iSectorSize = -1;
+  iDc = -1;
+  iSectorSize = -1;

  if( objc<3 ){
    Tcl_WrongNumArgs(interp, 1, objv, "?OPTIONS? DELAY CRASHFILE");
--- a/src/test_malloc.c
+++ b/src/test_malloc.c
@@ -13,7 +13,7 @@
 ** This file contains code used to implement test interfaces to the
 ** memory allocation subsystem.
 **
-** $Id: test_malloc.c,v 1.4 2007/08/23 02:47:53 drh Exp $
+** $Id: test_malloc.c,v 1.5 2007/08/24 03:51:34 drh Exp $
 */
 #include "sqliteInt.h"
 #include "tcl.h"
@@ -287,25 +287,6 @@ static int test_memdebug_fail(
 }


-/*
-** Usage:    sqlite3_memdebug_pending
-**
-** Return the number of successful mallocs remaining before the
-** next simulated failure.  Return -1 if no simulated failure is
-** currently scheduled.
-*/
-static int test_memdebug_pending(
-  void * clientData,
-  Tcl_Interp *interp,
-  int objc,
-  Tcl_Obj *CONST objv[]
-){
-  extern int sqlite3_memdebug_pending(void);
-  Tcl_SetObjResult(interp, Tcl_NewIntObj(sqlite3_memdebug_pending()));
-  return TCL_OK;
-}
-
-
 /*
 ** Usage:    sqlite3_memdebug_settitle TITLE
 **
@@ -354,7 +335,6 @@ int Sqlitetest_malloc_Init(Tcl_Interp *interp){
     { "sqlite3_memdebug_backtrace", test_memdebug_backtrace       },
     { "sqlite3_memdebug_dump",      test_memdebug_dump            },
     { "sqlite3_memdebug_fail",      test_memdebug_fail            },
-     { "sqlite3_memdebug_pending",   test_memdebug_pending         },
     { "sqlite3_memdebug_settitle",  test_memdebug_settitle        },
  };
  int i;
--- a/src/vdbeapi.c
+++ b/src/vdbeapi.c
@@ -702,9 +702,9 @@ static const void *columnName(
    n = sqlite3_column_count(pStmt);
    if( N<n && N>=0 ){
      N += useType*n;
+      sqlite3_mutex_enter(p->db->mutex);
      ret = xFunc(&p->aColName[N]);

-#if 0
      /* A malloc may have failed inside of the xFunc() call. If this
      ** is the case, clear the mallocFailed flag and return NULL.
      */
@@ -712,7 +712,7 @@ static const void *columnName(
        p->db->mallocFailed = 0;
        ret = 0;
      }
-#endif
+      sqlite3_mutex_leave(p->db->mutex);
    }
  }
  return ret;
--- a/src/vdbeaux.c
+++ b/src/vdbeaux.c
@@ -1007,7 +1007,6 @@ static void Cleanup(Vdbe *p){
 void sqlite3VdbeSetNumCols(Vdbe *p, int nResColumn){
  Mem *pColName;
  int n;
-  sqlite3 *db = p->db;

  releaseMemArray(p->aColName, p->nResColumn*COLNAME_N);
  sqlite3_free(p->aColName);
@@ -1017,7 +1016,7 @@ void sqlite3VdbeSetNumCols(Vdbe *p, int nResColumn){
  if( p->aColName==0 ) return;
  while( n-- > 0 ){
    pColName->flags = MEM_Null;
-    pColName->db = db;
+    pColName->db = p->db;
    pColName++;
  }
 }
--- a/src/vtab.c
+++ b/src/vtab.c
@@ -11,7 +11,7 @@
 *************************************************************************
 ** This file contains code used to help implement virtual tables.
 **
-** $Id: vtab.c,v 1.53 2007/08/23 02:47:53 drh Exp $
+** $Id: vtab.c,v 1.54 2007/08/24 03:51:34 drh Exp $
 */
 #ifndef SQLITE_OMIT_VIRTUALTABLE
 #include "sqliteInt.h"
@@ -24,10 +24,11 @@ static int createModule(
  void (*xDestroy)(void *)        /* Module destructor function */
 ) {
  int rc, nName;
+  Module *pMod;

  sqlite3_mutex_enter(db->mutex);
  nName = strlen(zName);
-  Module *pMod = (Module *)sqlite3DbMallocRaw(db, sizeof(Module) + nName + 1);
+  pMod = (Module *)sqlite3DbMallocRaw(db, sizeof(Module) + nName + 1);
  if( pMod ){
    char *zCopy = (char *)(&pMod[1]);
    memcpy(zCopy, zName, nName+1);
--- a/test/diskfull.test
+++ b/test/diskfull.test
@@ -12,7 +12,7 @@
 # focus of this file is testing for correct handling of disk full
 # errors.
 # 
-# $Id: diskfull.test,v 1.6 2007/04/05 17:15:53 danielk1977 Exp $
+# $Id: diskfull.test,v 1.7 2007/08/24 03:51:34 drh Exp $

 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -113,4 +113,3 @@ do_diskfull_test diskfull-2 VACUUM
 # }

 finish_test
-