mmap for windows #3557
mmap for windows #3557
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programs/fileio.c
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| static void FIO_munmap(void* buffer, size_t bufferSize) { | ||
| (void)bufferSize; | ||
| free(buffer); | ||
| static void FIO_munmap(const FIO_Dict_t* dict) { |
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same comment here, prefer FIO_Dict_t* dict as argument type.
programs/fileio.c
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| } | ||
| /* We might want to also do mapping for windows */ | ||
| static size_t FIO_createDictBufferMMap(void** bufferPtr, const char* fileName, FIO_prefs_t* const prefs, stat_t* dictFileStat) | ||
| static size_t FIO_createDictBufferMMap(FIO_Dict_t* dict, const char* fileName, FIO_prefs_t* const prefs, stat_t* dictFileStat) |
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discussion on naming convention :
When I read a function name like PREFIX_createType(), I expect it to return a Type* pointer object.
That's not the case here.
On a related note, if the object is allocated beforehand (on stack for example), I would consider PREFIX_initType(Type* v, ...) for the function name.
I note that this situation is slightly different : you want to set member dict->dictBuffer with the outcome of mmap (and I presume FIO_Dict_t is larger than this member), and return the underlying file size.
In which case, maybe FIO_setDictBufferMMap() ?
daniellerozenblit
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…jects in free functions
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programs/fileio.c
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| ress.dict.dictBufferSize = FIO_createDictBufferMMap(&ress.dict.dictBuffer, dictFileName, prefs, &ress.dictFileStat); | ||
| } | ||
| dictBufferType = (useMMap && !forceNoUseMMap) ? FIO_mmapDict : FIO_mallocDict; | ||
| ress.dict.dictBufferSize = FIO_initDict(&ress.dict, dictFileName, prefs, &ress.dictFileStat, dictBufferType); /* works with dictFileName==NULL */ |
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The return value of FIO_initDict() is used to initialize ress.dict.dictBufferSize.
Since the stated goal of FIO_initDict() is to initialize ress.dict,
I would rather expect FIO_initDict() to directly set ress.dict.dictBufferSize as part of the initialization.
FIO_initDict() should rather return a success/error code.
…ze of the set buffer
This PR is a follow-up to #3486. It adds memory-mapped dictionaries for Windows.