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path: root/src/include/storage/dsm_impl.h
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2025-01-01Update copyright for 2025Bruce Momjian
Backpatch-through: 13
2024-01-04Update copyright for 2024Bruce Momjian
Reported-by: Michael Paquier Discussion: https://postgr.es/m/[email protected] Backpatch-through: 12
2023-10-26Add trailing commas to enum definitionsPeter Eisentraut
Since C99, there can be a trailing comma after the last value in an enum definition. A lot of new code has been introducing this style on the fly. Some new patches are now taking an inconsistent approach to this. Some add the last comma on the fly if they add a new last value, some are trying to preserve the existing style in each place, some are even dropping the last comma if there was one. We could nudge this all in a consistent direction if we just add the trailing commas everywhere once. I omitted a few places where there was a fixed "last" value that will always stay last. I also skipped the header files of libpq and ecpg, in case people want to use those with older compilers. There were also a small number of cases where the enum type wasn't used anywhere (but the enum values were), which ended up confusing pgindent a bit, so I left those alone. Discussion: https://www.postgresql.org/message-id/flat/386f8c45-c8ac-4681-8add-e3b0852c1620%40eisentraut.org
2023-01-25Avoid type cheats for invalid dsa_handles and dshash_table_handles.Tom Lane
Invent separate macros for "invalid" values of these types, so that we needn't embed knowledge of their representations into calling code. These are all zeroes anyway ATM, so this is not fixing any live bug, but it makes the code cleaner and more future-proof. I (tgl) also chose to move DSM_HANDLE_INVALID into dsm_impl.h, since it seems like it should live beside the typedef for dsm_handle. Hou Zhijie, Nathan Bossart, Kyotaro Horiguchi, Tom Lane Discussion: https://postgr.es/m/OS0PR01MB5716860B1454C34E5B179B6694C99@OS0PR01MB5716.jpnprd01.prod.outlook.com
2023-01-02Update copyright for 2023Bruce Momjian
Backpatch-through: 11
2022-04-08Apply PGDLLIMPORT markings broadly.Robert Haas
Up until now, we've had a policy of only marking certain variables in the PostgreSQL header files with PGDLLIMPORT, but now we've decided to mark them all. This means that extensions running on Windows should no longer operate at a disadvantage as compared to extensions running on Linux: if the variable is present in a header file, it should be accessible. Discussion: http://postgr.es/m/CA+TgmoYanc1_FSfimhgiWSqVyP5KKmh5NP2BWNwDhO8Pg2vGYQ@mail.gmail.com
2022-01-08Update copyright for 2022Bruce Momjian
Backpatch-through: 10
2021-01-02Update copyright for 2021Bruce Momjian
Backpatch-through: 9.5
2020-07-31Preallocate some DSM space at startup.Thomas Munro
Create an optional region in the main shared memory segment that can be used to acquire and release "fast" DSM segments, and can benefit from huge pages allocated at cluster startup time, if configured. Fall back to the existing mechanisms when that space is full. The size is controlled by a new GUC min_dynamic_shared_memory, defaulting to 0. Main region DSM segments initially contain whatever garbage the memory held last time they were used, rather than zeroes. That change revealed that DSA areas failed to initialize themselves correctly in memory that wasn't zeroed first, so fix that problem. Discussion: https://postgr.es/m/CA%2BhUKGLAE2QBv-WgGp%2BD9P_J-%3Dyne3zof9nfMaqq1h3EGHFXYQ%40mail.gmail.com
2020-01-01Update copyrights for 2020Bruce Momjian
Backpatch-through: update all files in master, backpatch legal files through 9.4
2019-05-22Phase 2 pgindent run for v12.Tom Lane
Switch to 2.1 version of pg_bsd_indent. This formats multiline function declarations "correctly", that is with additional lines of parameter declarations indented to match where the first line's left parenthesis is. Discussion: https://postgr.es/m/CAEepm=0P3FeTXRcU5B2W3jv3PgRVZ-kGUXLGfd42FFhUROO3ug@mail.gmail.com
2019-01-02Update copyright for 2019Bruce Momjian
Backpatch-through: certain files through 9.4
2018-11-06Remove dsm_resize() and dsm_remap().Thomas Munro
These interfaces were never used in core, didn't handle failure of posix_fallocate() correctly and weren't supported on all platforms. We agreed to remove them in 12. Author: Thomas Munro Reported-by: Andres Freund Discussion: https://postgr.es/m/CAA4eK1%2B%3DyAFUvpFoHXFi_gm8YqmXN-TtkFH%2BVYjvDLS6-SFq-Q%40mail.gmail.com
2018-07-10Remove dynamic_shared_memory_type=nonePeter Eisentraut
PostgreSQL nowadays offers some kind of dynamic shared memory feature on all supported platforms. Having the choice of "none" prevents us from relying on DSM in core features. So this patch removes the choice of "none". Author: Kyotaro Horiguchi <[email protected]>
2018-01-03Update copyright for 2018Bruce Momjian
Backpatch-through: certain files through 9.3
2017-06-21Phase 2 of pgindent updates.Tom Lane
Change pg_bsd_indent to follow upstream rules for placement of comments to the right of code, and remove pgindent hack that caused comments following #endif to not obey the general rule. Commit e3860ffa4dd0dad0dd9eea4be9cc1412373a8c89 wasn't actually using the published version of pg_bsd_indent, but a hacked-up version that tried to minimize the amount of movement of comments to the right of code. The situation of interest is where such a comment has to be moved to the right of its default placement at column 33 because there's code there. BSD indent has always moved right in units of tab stops in such cases --- but in the previous incarnation, indent was working in 8-space tab stops, while now it knows we use 4-space tabs. So the net result is that in about half the cases, such comments are placed one tab stop left of before. This is better all around: it leaves more room on the line for comment text, and it means that in such cases the comment uniformly starts at the next 4-space tab stop after the code, rather than sometimes one and sometimes two tabs after. Also, ensure that comments following #endif are indented the same as comments following other preprocessor commands such as #else. That inconsistency turns out to have been self-inflicted damage from a poorly-thought-through post-indent "fixup" in pgindent. This patch is much less interesting than the first round of indent changes, but also bulkier, so I thought it best to separate the effects. Discussion: https://postgr.es/m/[email protected] Discussion: https://postgr.es/m/[email protected]
2017-01-03Update copyright via script for 2017Bruce Momjian
2016-08-23Extend dsm API with a new function dsm_unpin_segment.Robert Haas
If you have previously pinned a segment and decide that you don't actually want to keep it around until shutdown, this new API lets you remove the pin. This is pretty trivial except on Windows, where it requires closing the duplicate handle that was used to implement the pin. Thomas Munro and Amit Kapila, reviewed by Amit Kapila and by me.
2016-04-29Fix typoMagnus Hagander
Author: Thomas Munro
2016-01-02Update copyright for 2016Bruce Momjian
Backpatch certain files through 9.1
2015-01-06Update copyright for 2015Bruce Momjian
Backpatch certain files through 9.0
2014-10-30"Pin", rather than "keep", dynamic shared memory mappings and segments.Robert Haas
Nobody seemed concerned about this naming when it originally went in, but there's a pending patch that implements the opposite of dsm_keep_mapping, and the term "unkeep" was judged unpalatable. "unpin" has existing precedent in the PostgreSQL code base, and the English language, so use this terminology instead. Per discussion, back-patch to 9.4.
2014-05-06pgindent run for 9.4Bruce Momjian
This includes removing tabs after periods in C comments, which was applied to back branches, so this change should not effect backpatching.
2014-03-10Allow dynamic shared memory segments to be kept until shutdown.Robert Haas
Amit Kapila, reviewed by Kyotaro Horiguchi, with some further changes by me.
2014-01-07Update copyright for 2014Bruce Momjian
Update all files in head, and files COPYRIGHT and legal.sgml in all back branches.
2013-10-28Modify dynamic shared memory code to use Size rather than uint64.Robert Haas
This is more consistent with what we do elsewhere.
2013-10-10Allow dynamic allocation of shared memory segments.Robert Haas
Patch by myself and Amit Kapila. Design help from Noah Misch. Review by Andres Freund.
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