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Overview
Comment: | Updates to the VFS SHM locking documentation. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
9927ce421090ac20285cf05768b38e1f |
User & Date: | drh 2010-05-06 19:04:49.000 |
Context
2010-05-06
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19:20 | Changes to support SQLITE_OMIT_WAL. (check-in: 32a8501d78 user: shaneh tags: trunk) | |
19:04 | Updates to the VFS SHM locking documentation. (check-in: 9927ce4210 user: drh tags: trunk) | |
18:48 | Instead of transitioning to RECOVER state from CHECKPOINT when a recovery is required, perform the recovery while holding the CHECKPOINT lock. (check-in: bb0b6021e7 user: dan tags: trunk) | |
Changes
Changes to doc/vfs-shm.txt.
︙ | ︙ | |||
111 112 113 114 115 116 117 | (11j) READ_FULL RECOVER RECOVER (11k) WRITE READ READ (11l) PENDING UNLOCK UNLOCK (11m) PENDING CHECKPOINT CHECKPOINT (11n) CHECKPOINT UNLOCK UNLOCK (11o) RECOVER READ READ | | | < < < | 111 112 113 114 115 116 117 118 119 120 | (11j) READ_FULL RECOVER RECOVER (11k) WRITE READ READ (11l) PENDING UNLOCK UNLOCK (11m) PENDING CHECKPOINT CHECKPOINT (11n) CHECKPOINT UNLOCK UNLOCK (11o) RECOVER READ READ These 15 transitions are all that needs to be supported. The lock manager implementation can assert that fact. The other 27 possible transitions among the 7 locking states will never occur. |