TermiNexus
85f67b5558
二者在 Windows 头文件里都是"单个 PVOID 的结构"（sizeof 8），API 收的是**存储地址**。 原先声明成 VOIDPTR（i8*）⇒ `c.Addr(self.cond_var)` 得到 i8**（多一层），与形参 i8* 层数 不符（指针隐式转换收紧后报 CastError，现场 includes/condition.vp:27）。 - win32sync.vp：新增 class SRWLOCK / class CONDITION_VARIABLE（Ptr: VOIDPTR，8 字节）； 5 个 SRWLock extern 与 5 个条件变量 extern 的形参由 VOIDPTR 改为对应结构体指针 - condition.vp：cond_var 由 VOIDPTR 改为 CONDITION_VARIABLE - rwlock.vp：lock 由 VOIDPTR 改为 SRWLOCK 布局与运行期语义均不变（都是 8 字节、对齐 8，传的仍是那块存储的地址）。
47 lines
1.1 KiB
Plaintext
47 lines
1.1 KiB
Plaintext
import t, c
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from stdint import *
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from w32.win32base import *
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from w32.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(c.Addr(self.lock))
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def acquire_read(self):
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AcquireSRWLockShared(c.Addr(self.lock))
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def release_read(self):
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ReleaseSRWLockShared(c.Addr(self.lock))
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def acquire_write(self):
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AcquireSRWLockExclusive(c.Addr(self.lock))
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def release_write(self):
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ReleaseSRWLockExclusive(c.Addr(self.lock))
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def __enter__(self) -> 'RWLock' | t.CPtr:
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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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