Comments (8)
@georgehazan, у меня нет XP чтобы по-завершении проверить совместимость. Поможете?
В идеале это-бы прикрутить к текущему CI на AppVeyor, но у меня не получилось добиться сборки со старым SDK (всё равно были доступны определения из последующих версий).
Кроме этого, нужно синхронизировать все (даже минимальные) ваши правки с mainstream.
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@leo-yuriev да, конечно помогу. у меня есть XP, можно пробовать в любой момент
Кроме этого, нужно синхронизировать все (даже минимальные) ваши правки с mainstream.
Правок две, одна чисто косметическая для сборки со старым SDK, вторая - для пробрасывания флага MDBX_EXCLUSIVE внутрь открытия файла.
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@georgehazan, а можете выслать мне почтой таблицу экспорта из 32-битной версии ntdll.dll от Windows XP или Windows 2000?
dumpbin.exe /exports C:\Windows\System32\ntdll.dll > ntdll.exp
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@wangjia184, please check currnt master branch.
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Thanks @leo-yuriev
I am implementing a .NET standard assembly wrapping libmdbx v1.6.
Will this change merged to v0.1?
Is there any breaking changes in the exposed methods between v2.0(master) and v1.6(0.1 branch)
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@leo-yuriev these changes might cause serious performance degradation, because memory management inside Universal CRT is much faster & safer than one in kernel32.dll (Local*). my advice is to keep both variants, i.e. libmdbx should call usual CRT functions, if macro MDBX_BUILD_DLL is not defined
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Thanks @leo-yuriev
I am implementing a .NET standard assembly wrapping libmdbx v1.6.Will this change merged to v0.1?
No, since it is not a bugfux, but enhancement.
Is there any breaking changes in the exposed methods between v2.0(master) and v1.6(0.1 branch)
Do you tried git diff v0.1.6 v0.2.0 -- mdbx.h
?
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@leo-yuriev these changes might cause serious performance degradation, because memory management inside Universal CRT is much faster & safer than one in kernel32.dll (Local*). my advice is to keep both variants, i.e. libmdbx should call usual CRT functions, if macro MDBX_BUILD_DLL is not defined.
In 30 years, Windows has not introduced acceptable dynamic memory management API?
Seems this is not an libmdbx issue ;)
Nevertheless, libmdbx calls memory-management functions relatively rare.
Most often such calls occurs for page allocation, but only when DB was opened without MDBX_WRITEMAP.
So, the overhead from Windows I/O will be 100-1000 times large than the memory management.
On the other hand, the switching to CRT functions should be available at least to measure an actual difference. So, d2bfb2e.
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Related Issues (20)
- Assertion `head_txnid != head_txnid' failed when using MDBX_SAFE_NOSYNC HOT 1
- fails to compile under termux (android) (v0.11.3) HOT 1
- Inserting much data in 1 tx causing OOM Killer HOT 3
- 4Tb assert HOT 49
- mdbx_env_open returns error 22 (Invalid argument) on 32-bit Android devices HOT 10
- [mdbx::byte] better forgo char8_t and always use unsigned char HOT 1
- "make dist" error on Mac HOT 1
- Windows MSVC 16.11.9 compile error HOT 10
- MDBX_SAFE_NOSYNC clarification HOT 5
- EXC_BAD_ACCESS on older iOS devices for first launch HOT 9
- is it possible to compile libmdbx for visual studio 2008 HOT 5
- Incoherent flaw of Linux' unified page/buffer cache HOT 7
- Enable overlapping RW+RO transactions HOT 3
- Unexpected 'MDBX_PROBLEM' error when reusing cursors from read-only transactions HOT 7
- mdbx_meta_head is not defined HOT 3
- Reference mdbx4s in the bindings table HOT 2
- Documentation about shared library build only HOT 2
- Intermittent MDBX_BAD_DBI error HOT 13
- Tracking DB size increase HOT 4
- Apple's Clang 12+ and deprecation treated as error HOT 12
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