Merge the mutex-free PRNG change into this branch.

FossilOrigin-Name: 8b1fc4b9f3e743bffcfbbb8e26991240441778e10512fb502b8eaec460184296

diff --cc manifest
index 586495b209b6b120f3d0653297cbdd6670bb8395,494f65db2e2bb1e54a07f7291c2e781467c226fe..64743c35cd8226b8600a5307a969159cd2d66488
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Hack\sto\shave\smultiple\sconnections\sto\sa\ssingle\sfile\sshare\sa\nsingle\smemory\smapping\sof\sthe\sdatabse\sfile.
- D 2017-09-12T18:03:12.014
 -C Use\sa\smutex-free\sPRNG\sfor\sthe\srandom()\sand\srandomblob()\sSQL\sfunctions\sand\sfor\nthe\srandomness\sused\sduring\scheckpoint\soperations.
 -D 2017-09-09T08:03:28.579
++C Merge\sthe\smutex-free\sPRNG\schange\sinto\sthis\sbranch.
++D 2017-09-12T18:11:46.985
  F Makefile.in c644bbe8ebe4aae82ad6783eae6b6beea4c727b99ff97568b847ced5e2ac7afb
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc 6a7a74bf60ad395098c0bd175ab054cd65ef85d7f034198d52bcc4d9e5fb4c6b
@@@ -441,7 -441,7 +441,7 @@@ F src/os.c 93e0979b9b55df29c0c4923f73b4
  F src/os.h 8e976e59eb4ca1c0fca6d35ee803e38951cb0343
  F src/os_common.h b2f4707a603e36811d9b1a13278bffd757857b85
  F src/os_setup.h 0dbaea40a7d36bf311613d31342e0b99e2536586
- F src/os_unix.c f36ad99b752d4abf1b8c1d1b8ea83fa6a5010c7a76cf6a0a76abb83641aa8948
 -F src/os_unix.c 489aa972ccc34f7b4770b891694b32101c59ddd4be4ef0ddd9a4da58c145c1a6
++F src/os_unix.c e29ad5a4214511a5bdb9c2cd31ed8d949f4282b6f07d0e35d2a06be77e388153
  F src/os_win.c 964165b66cde03abc72fe948198b01be608436894732eadb94c8720d2467f223
  F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
  F src/pager.c 967168bba88d2dc790ed9618bd4ba7bfe475b67b521ef6da305a6425c592928f
@@@ -454,16 -454,16 +454,16 @@@ F src/pragma.c faf5f9ec553b71035c63e08d
  F src/pragma.h bb83728944b42f6d409c77f5838a8edbdb0fe83046c5496ffc9602b40340a324
  F src/prepare.c 9a141a1b02dca53beaa9771699d390aafcac01f5d1f1c0ae6e23ded8dcdb709a
  F src/printf.c 40aee47ae9be4bd3dbdc8968bd07fddc027be8edec8daddf24d3391d36698a1c
- F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
+ F src/random.c f27af4099afaea7284ade5c206224dcfdb2334cfd119d018b470d46356b3f27d
  F src/resolve.c 4324a94573b1e29286f8121e4881db59eaedc014afeb274c8d3e07ed282e0e20
  F src/rowset.c 7b7e7e479212e65b723bf40128c7b36dc5afdfac
- F src/select.c c9b3d8444bbf6f167d84f41ca6f3672e2521cb163a8c706b19058dc82fffe9b8
+ F src/select.c 5bda89e7cda69ef9cdd25c98ee6403ed2a3753d5ab135e24fc7a20344fd68d0a
  F src/shell.c c1206a23d9239f8f51751d3be9b8c3b02fa4103546bea1add7f864d84a8276ab
  F src/shell.c.in bb9720a8c5c98d3984b16ab7540e7142bcae959666ecf248bfc523a1d44220ee
 -F src/sqlite.h.in 21f62793a3611b43f6fb31f0a4c8b38489a4df025416e9b7db7cc01bf5ef5aaa
 +F src/sqlite.h.in ab4f8a29d1580dfaeb6891fa1b83cff8229ba0daa56994707ceaca71495d9ab7
  F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
  F src/sqlite3ext.h a1fd3aa82f967da436164e0728a7d6841651fd0c6e27b9044e0eb9f6c8462e47
- F src/sqliteInt.h f9ae3609a583aa51712083e1d5817f62c7d97c0a203036a9a62c439059e8258b
+ F src/sqliteInt.h 63e64c24f19910f52d2910f000b070a027fad42d134055970c98c18a76584fce
  F src/sqliteLimit.h 1513bfb7b20378aa0041e7022d04acb73525de35b80b252f1b83fedb4de6a76b
  F src/status.c 9737ed017279a9e0c5da748701c3c7bf1e8ae0dae459aad20dd64fcff97a7e35
  F src/table.c b46ad567748f24a326d9de40e5b9659f96ffff34
@@@ -536,13 -536,13 +536,13 @@@ F src/vdbesort.c 731a09e5cb9e96b70c394c
  F src/vdbetrace.c 48e11ebe040c6b41d146abed2602e3d00d621d7ebe4eb29b0a0f1617fd3c2f6c
  F src/vtab.c f1d5c23132fb0247af3e86146404112283ddedb6c518de0d4edc91cfb36970ef
  F src/vxworks.h d2988f4e5a61a4dfe82c6524dd3d6e4f2ce3cdb9
- F src/wal.c 839db09792fead5052bb35e533fa485e134913d547d05b5f42e537b73e63f07a
+ F src/wal.c 2a205ec9c9be4e4b2933d32481c4654b4c6b644d8a6c755a5f8c7a10ade64616
  F src/wal.h 8de5d2d3de0956d6f6cb48c83a4012d5f227b8fe940f3a349a4b7e85ebcb492a
  F src/walker.c 3ccfa8637f95355bff61144e01a615b8ef26f79c312880848da73f03367da1e6
 -F src/where.c 101f0a645c45c12141b38a61b593232555fc001bf7786dcb03eb8f313783b404
 -F src/whereInt.h 93bb90b77d39901eda31b44d8e90da1351193ccfe96876f89b58a93a33b84c3d
 -F src/wherecode.c d246d19f5453d3f154ed8fcea892ce6d70ae4a5ddaebae34bd49d73f4c913bc7
 -F src/whereexpr.c fe1fe600d7334e91f3d9d487021362d543fba8ab2f1be5e0d68063d619379c05
 +F src/where.c d97f97ca6017747b7361af7f168a640d667c41cd1d4e91c2c5b2bd7538815d07
 +F src/whereInt.h 82c04c5075308abbac59180c8bad5ecb45b07453981f60a53f3c7dee21e1e971
 +F src/wherecode.c e8c2ece5843ea56e6c90277d421f2d628f3f7b7c976642369cc519f008e1d2b1
 +F src/whereexpr.c 4953ca4e769c047d0a00a1ba9085849626b1f3a6e89f6befcf5c38fa0722acdd
  F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
  F test/affinity2.test a6d901b436328bd67a79b41bb0ac2663918fe3bd
  F test/affinity3.test 6a101af2fc945ce2912f6fe54dd646018551710d
@@@ -1653,10 -1652,10 +1653,7 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 9780b23ca375de6a542516fbc03eb39d5a393ca577718fda231d0d0ccf3b1c7e
- R 4c111361f04c7540b8ad9592d8f1048c
- T *branch * shared-mapping-hack
- T *sym-shared-mapping-hack *
 -P faa22e29a5a05a16d46a428d838acedfa7d6fad6239495d59a6a1f4764e1b1b6
 -R a52f584275f92dc78c3958a57a4f1fc7
 -T *branch * mutex-free-randomness
 -T *sym-mutex-free-randomness *
--T -sym-trunk *
 -U drh
 -Z fc9d4eaa55f9d67c6518af204f0991ab
++P ec37ad6d08362f4c9faad9b629c0fa23f5864ff6ad7f4cbed93a25d5f7b815d8 e63d1a7cd317811f74d206ae47bd11a8fc6b6311218fbc6d0cbf49e8281b362f
++R 58f29375792bfe5289eb6786bf7b0a0d
 +U dan
- Z 4c10a02d9e6c902f708178ec77270bb4
++Z ef610292ad3539a3bd7d48ac46fca1d9

diff --cc manifest.uuid
index 7883ac15df2a0c8c8f6f114dcb10797661d9a4d4,99d7c5ea8320439aaf11eb343132c690d88a756c..3a2067f9c536af740cd5efd2c7c46032281a861f
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- ec37ad6d08362f4c9faad9b629c0fa23f5864ff6ad7f4cbed93a25d5f7b815d8
 -e63d1a7cd317811f74d206ae47bd11a8fc6b6311218fbc6d0cbf49e8281b362f
++8b1fc4b9f3e743bffcfbbb8e26991240441778e10512fb502b8eaec460184296

diff --cc src/os_unix.c
index 02d35011f327f05917ee5dcf768186419bdcac40,0d7e4941471229f61402749c8c792b17d3d5e27f..1f62989d515194ee76bc572c6aeb60e76ef39552
--- 1/src/os_unix.c
--- 2/src/os_unix.c
+++ b/src/os_unix.c
@@@ -46,8 -46,6 +46,8 @@@
  #include "sqliteInt.h"
  #if SQLITE_OS_UNIX              /* This file is used on unix only */
  
- #define SQLITE_SHARED_MAPPING 1
++/* #define SQLITE_SHARED_MAPPING 1 */
 +
  /*
  ** There are various methods for file locking used for concurrency
  ** control: