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Viewing changes to bzrlib/lock.py

  • Committer: Andrew Bennetts
  • Date: 2008-02-18 08:30:38 UTC
  • mto: This revision was merged to the branch mainline in revision 3756.
  • Revision ID: andrew.bennetts@canonical.com-20080218083038-tts55zsx5xrz3l2e
Lots of assorted hackery to reduce the number of imports for common operations.  Improves 'rocks', 'st' and 'help' times by ~50ms on my laptop.

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bzrlib/lock.py
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    have_fcntl = True
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except ImportError:
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    have_fcntl = False
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try:
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    import win32con, win32file, pywintypes, winerror, msvcrt
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    have_pywin32 = True
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except ImportError:
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    have_pywin32 = False
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try:
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    import ctypes, msvcrt
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    have_ctypes = True
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except ImportError:
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    have_ctypes = False
 
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have_pywin32 = False
 
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if sys.platform == 'win32':
 
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    try:
 
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        import win32con, win32file, pywintypes, winerror, msvcrt
 
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        have_pywin32 = True
 
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    except ImportError:
 
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        pass
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_lock_classes = []
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    _lock_classes.append(('pywin32', _w32c_WriteLock, _w32c_ReadLock))
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if have_ctypes and sys.platform == 'win32':
 
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have_ctypes_win32 = False
 
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if sys.platform == 'win32':
 
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    try:
 
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        import ctypes, msvcrt
 
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        have_ctypes_win32 = True
 
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    except ImportError:
 
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        pass
 
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if have_ctypes_win32:
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    # These constants were copied from the win32con.py module.
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    LOCKFILE_FAIL_IMMEDIATELY = 1
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    LOCKFILE_EXCLUSIVE_LOCK = 2