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Merge pull request #90 from mwmbl/m1-mmap-issue-fix-2 

Offset by metadata size manually to increase compatibility
This commit is contained in:
Daoud Clarke 2023-02-11 08:30:46 +00:00 committed by GitHub
parent bd0cc3863e e890e56661
commit 2daf902ca3
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 3 deletions
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6
mwmbl/tinysearchengine/indexer.py
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@ -122,7 +122,7 @@ class TinyIndex(Generic[T]):
def __enter__(self):
self.index_file = open(self.index_path, 'r+b')
prot = PROT_READ if self.mode == 'r' else PROT_READ | PROT_WRITE
self.mmap = mmap(self.index_file.fileno(), 0, offset=METADATA_SIZE, prot=prot)
self.mmap = mmap(self.index_file.fileno(), 0, prot=prot)
return self
def __exit__(self, exc_type, exc_val, exc_tb):
@ -146,7 +146,7 @@ class TinyIndex(Generic[T]):
return [self.item_factory(*item) for item in results]
def _get_page_tuples(self, i):
page_data = self.mmap[i * self.page_size:(i + 1) * self.page_size]
page_data = self.mmap[i * self.page_size + METADATA_SIZE:(i + 1) * self.page_size + METADATA_SIZE]
try:
decompressed_data = self.decompressor.decompress(page_data)
except ZstdError:
@ -186,7 +186,7 @@ class TinyIndex(Generic[T]):
page_data = _get_page_data(self.compressor, self.page_size, data)
logger.debug(f"Got page data of length {len(page_data)}")
self.mmap[i * self.page_size:(i+1) * self.page_size] = page_data
self.mmap[i * self.page_size:(i+1) * self.page_size + METADATA_SIZE] = page_data
@staticmethod
def create(item_factory: Callable[..., T], index_path: str, num_pages: int, page_size: int):