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Compose platform_base from the platform-specific functionality

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Noticed while working on the windows branch.
This commit is contained in:
Marian Beermann 2016-05-31 02:22:27 +02:00
parent a1c4d45920
commit 2d90bb2c55
1 changed files with 16 additions and 2 deletions
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18
src/borg/platform_base.py
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@ -1,5 +1,17 @@
import os import os
"""
platform base module
====================
Contains platform API implementations based on what Python itself provides. More specific
APIs are stubs in this module.
When functions in this module use platform APIs themselves they access the public
platform API: that way platform APIs provided by the platform-specific support module
are correctly composed into the base functionality.
"""
API_VERSION = 3 API_VERSION = 3
fdatasync = getattr(os, 'fdatasync', os.fsync) fdatasync = getattr(os, 'fdatasync', os.fsync)
@ -80,16 +92,18 @@ class SyncFile:
Synchronize file contents. Everything written prior to sync() must become durable before anything written Synchronize file contents. Everything written prior to sync() must become durable before anything written
after sync(). after sync().
""" """
from .. import platform
self.fd.flush() self.fd.flush()
fdatasync(self.fileno) platform.fdatasync(self.fileno)
if hasattr(os, 'posix_fadvise'): if hasattr(os, 'posix_fadvise'):
os.posix_fadvise(self.fileno, 0, 0, os.POSIX_FADV_DONTNEED) os.posix_fadvise(self.fileno, 0, 0, os.POSIX_FADV_DONTNEED)
def close(self): def close(self):
"""sync() and close.""" """sync() and close."""
from .. import platform
self.sync() self.sync()
self.fd.close() self.fd.close()
sync_dir(os.path.dirname(self.fd.name)) platform.sync_dir(os.path.dirname(self.fd.name))
def swidth(s): def swidth(s):