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lmdb: methods to support custom comparison Txn.SetCmp(), Txn.SetCmpDup() #27

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lmdb: methods to support custom comparison Txn.SetCmp(), Txn.SetCmpDup() #27

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Commits on Dec 6, 2023

  1. lmdb: methods to support custom comparison Txn.SetCmp(), Txn.SetCmpDup() 

    The methods bind the mdb_set_compare and mdb_set_dupsort functions
respectively.  The methods are very hard to call. They require C
function pointers as arguments and hooking Go functions from custom C
functions is tricky, which lots of overhead/boilerplate.
    @bmatsuo @fiatjaf
    bmatsuo authored and fiatjaf committed Dec 6, 2023
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  2. lmdb: godoc for CmpFunc

    @bmatsuo @fiatjaf
    bmatsuo authored and fiatjaf committed Dec 6, 2023
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  3. lmdb_cmp: experimental command to experiment with comparison functions

    @bmatsuo @fiatjaf
    bmatsuo authored and fiatjaf committed Dec 6, 2023
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  4. lmdb_cmp: add stub simulating dynamic dispatch of compare functions 

    Optimization in the compiler may be defeating the simulation to some
degree.
    @bmatsuo @fiatjaf
    bmatsuo authored and fiatjaf committed Dec 6, 2023
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  5. lmdb_cmp: pass the context integer from C

    @bmatsuo @fiatjaf
    bmatsuo authored and fiatjaf committed Dec 6, 2023
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  6. update copy of lmdb.h in exp/cmd/lmdb_cmp

    @bmatsuo @fiatjaf
    bmatsuo authored and fiatjaf committed Dec 6, 2023
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  7. use a .c and .h file to make things simpler

    @bmatsuo @fiatjaf
    bmatsuo authored and fiatjaf committed Dec 6, 2023
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  8. simplify lmdb_cmp example - use the recommended method for defining f… 

    …uncs
    @bmatsuo @fiatjaf
    bmatsuo authored and fiatjaf committed Dec 6, 2023
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  9. clean up the lmdb_cmp_simple example

    @bmatsuo @fiatjaf
    bmatsuo authored and fiatjaf committed Dec 6, 2023
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  10. add some documentation to the SetCmp and SetCmpDup

    @bmatsuo @fiatjaf
    bmatsuo authored and fiatjaf committed Dec 6, 2023
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  11. docs: fill out more docs regarding how custom comparison is implemented

    @bmatsuo @fiatjaf
    bmatsuo authored and fiatjaf committed Dec 6, 2023
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  12. update dependencies.

    @fiatjaf
    fiatjaf committed Dec 6, 2023
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