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Updates to the VFS SHM locking documentation.

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FossilOrigin-Name: 9927ce421090ac20285cf05768b38e1f91826a68
This commit is contained in:
drh 2010-05-06 19:04:48 +00:00
parent 65be0d8cce
commit 08fba00781
3 changed files with 20 additions and 13 deletions
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7
doc/vfs-shm.txt
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@ -115,9 +115,6 @@ The following are the allowed lock transitions:
(11n) CHECKPOINT UNLOCK UNLOCK (11n) CHECKPOINT UNLOCK UNLOCK
(11o) RECOVER READ READ (11o) RECOVER READ READ
These 17 transitions are all that needs to be supported. The lock These 15 transitions are all that needs to be supported. The lock
manager implementation can assert that fact. The other 25 possible manager implementation can assert that fact. The other 27 possible
transitions among the 7 locking states will never occur. transitions among the 7 locking states will never occur.
The rules above are sufficient for correctness. For maximum concurrency,
the following additional considerations apply:

24
manifest
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@ -1,5 +1,8 @@
C Instead\sof\stransitioning\sto\sRECOVER\sstate\sfrom\sCHECKPOINT\swhen\sa\srecovery\sis\srequired,\sperform\sthe\srecovery\swhile\sholding\sthe\sCHECKPOINT\slock. -----BEGIN PGP SIGNED MESSAGE-----
D 2010-05-06T18:48:28 Hash: SHA1
C Updates\sto\sthe\sVFS\sSHM\slocking\sdocumentation.
D 2010-05-06T19:04:49
F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
F Makefile.in a5cad1f8f3e021356bfcc6c77dc16f6f1952bbc3 F Makefile.in a5cad1f8f3e021356bfcc6c77dc16f6f1952bbc3
F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@ -24,7 +27,7 @@ F configure.ac 14740970ddb674d92a9f5da89083dff1179014ff
F contrib/sqlitecon.tcl 210a913ad63f9f991070821e599d600bd913e0ad F contrib/sqlitecon.tcl 210a913ad63f9f991070821e599d600bd913e0ad
F doc/lemon.html f0f682f50210928c07e562621c3b7e8ab912a538 F doc/lemon.html f0f682f50210928c07e562621c3b7e8ab912a538
F doc/pager-invariants.txt 870107036470d7c419e93768676fae2f8749cf9e F doc/pager-invariants.txt 870107036470d7c419e93768676fae2f8749cf9e
F doc/vfs-shm.txt 2b1a72d895e98fcc2db20573a9c29303223ae8b2 F doc/vfs-shm.txt 7945d691a41ec90f358f6415095ffe70cfc9fe9e
F ext/README.txt 913a7bd3f4837ab14d7e063304181787658b14e1 F ext/README.txt 913a7bd3f4837ab14d7e063304181787658b14e1
F ext/async/README.txt 0c541f418b14b415212264cbaaf51c924ec62e5b F ext/async/README.txt 0c541f418b14b415212264cbaaf51c924ec62e5b
F ext/async/sqlite3async.c 676066c2a111a8b3107aeb59bdbbbf335c348f4a F ext/async/sqlite3async.c 676066c2a111a8b3107aeb59bdbbbf335c348f4a
@ -813,7 +816,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
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manifest.uuid
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@ -1 +1 @@
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