Track total memory usage using a 64-bit integer on 64-bit systems. Add

the sqlite3_status64() interface.  Make the sqlite3_status() and
sqlite3_status64() interfaces atomic using mutexes and verify correct
mutex operation using assert() statements.

FossilOrigin-Name: 6fc4e79a2350295a15ac464593ad39d904953041

diff --cc manifest
index 8ca7814754851232be2f5fcff23d418dd2546484,4799c31f3a77b456027b1b5b747463fdae2cbfd0..53a9cfe78a39116667386795d5a7d8a566e90008
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sdatetype\ssize\sasserts\sin\sbtree.c.
- D 2015-03-23T19:03:51.368
 -C Fix\sa\snon-C89\svariable\sdeclaration\sthat\scauses\sproblems\sfor\sMSVC.
 -D 2015-03-23T19:16:30.885
++C Track\stotal\smemory\susage\susing\sa\s64-bit\sinteger\son\s64-bit\ssystems.\s\sAdd\nthe\ssqlite3_status64()\sinterface.\s\sMake\sthe\ssqlite3_status()\sand\nsqlite3_status64()\sinterfaces\satomic\susing\smutexes\sand\sverify\scorrect\nmutex\soperation\susing\sassert()\sstatements.
++D 2015-03-23T19:55:21.641
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in 88a3e6261286db378fdffa1124cad11b3c05f5bb
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1246,7 -1246,7 +1246,8 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P 8d27e3e16a9be79fe227e833f4770ebe09a9d90b
- R b5413ce9e25a08fe53ff3be92a646869
 -P c742bd6047bc6d0319a5a8c31d97f6b9229507f6
 -R 7eaa072c7f96e653ea839c906764b0b8
++P ff4812d0e8e6322ca8b6992925fd4ef4aee463e6 3de085eab2fbe491f2242b340851e8af8f61ad13
++R fa228592c968c6dd60a3ff76053c22f4
++T +closed 3de085eab2fbe491f2242b340851e8af8f61ad13
  U drh
- Z 5fbc203b6eb85f868f3432b74d400822
 -Z 211fd8daf94b9f843731a45e101ebe58
++Z 5ddc58556d6343081a340eb577f95e29

diff --cc manifest.uuid
index 16d4f53715a910cbe97d294fc89f24bf9b7fb180,c73dc87d686f1057b877423f3833ed46d1b8593b..dc77af10069b00e3a8094ec008dc8f8ca75678b0
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- ff4812d0e8e6322ca8b6992925fd4ef4aee463e6
 -3de085eab2fbe491f2242b340851e8af8f61ad13
++6fc4e79a2350295a15ac464593ad39d904953041