Mercurial > public > mercurial-scm > hg-stable
comparison mercurial/revlog.py @ 51650:d6c895e4adc4 stable
mmap: only use mmap to read revlog index if it is safe
Cf `is_mmap_safe` docstring.
| author | Pierre-Yves David <pierre-yves.david@octobus.net> |
|---|---|
| date | Wed, 03 Jul 2024 12:26:57 +0200 |
| parents | 1721d983dd6d |
| children | df6ce326936f |
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| 51649:ba205f944cb4 | 51650:d6c895e4adc4 |
|---|---|
| 1458 If the file is missing return the empty string""" | 1458 If the file is missing return the empty string""" |
| 1459 try: | 1459 try: |
| 1460 with self.opener(filepath) as fp: | 1460 with self.opener(filepath) as fp: |
| 1461 if mmap_threshold is not None: | 1461 if mmap_threshold is not None: |
| 1462 file_size = self.opener.fstat(fp).st_size | 1462 file_size = self.opener.fstat(fp).st_size |
| 1463 if file_size >= mmap_threshold: | 1463 if ( |
| 1464 file_size >= mmap_threshold | |
| 1465 and self.opener.is_mmap_safe(filepath) | |
| 1466 ): | |
| 1464 if size is not None: | 1467 if size is not None: |
| 1465 # avoid potentiel mmap crash | 1468 # avoid potentiel mmap crash |
| 1466 size = min(file_size, size) | 1469 size = min(file_size, size) |
| 1467 # TODO: should .close() to release resources without | 1470 # TODO: should .close() to release resources without |
| 1468 # relying on Python GC | 1471 # relying on Python GC |