46 lines
1.1 KiB
Plaintext
46 lines
1.1 KiB
Plaintext
from stdint import *
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from win32.win32base import *
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from win32.win32sync import (
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SRWLOCK,
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InitializeSRWLock,
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AcquireSRWLockExclusive, ReleaseSRWLockExclusive,
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AcquireSRWLockShared, ReleaseSRWLockShared
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)
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class RWLock:
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"""SRWLock-based read-write lock that supports multiple readers and single writer, but does not support recursion.
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Usage:
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rwlock: RWLock = RWLock()
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rwlock.acquire_read()
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# ... read shared data
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rwlock.release_read()
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rwlock.acquire_write()
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# ... modify shared data
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rwlock.release_write()
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"""
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lock: SRWLOCK
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def __init__(self):
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InitializeSRWLock(&self.lock)
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def acquire_read(self):
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AcquireSRWLockShared(&self.lock)
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def release_read(self):
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ReleaseSRWLockShared(&self.lock)
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def acquire_write(self):
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AcquireSRWLockExclusive(&self.lock)
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def release_write(self):
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ReleaseSRWLockExclusive(&self.lock)
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def __enter__(self) -> RWLock*:
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self.acquire_write()
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return self
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def __exit__(self):
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self.release_write()
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