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58 lines
2.6 KiB
XML
58 lines
2.6 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="RWLock" inherits="Reference" version="3.12">
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<brief_description>
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A Read Write Lock.
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</brief_description>
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<description>
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A Read Write Lock. This is used to synchronize multiple [Thread]s. This guarantees that only one thread can ever acquire the write lock at a time, and gives any number of threads read access in the meantime. An RWLock can be used to protect a critical section; however, be careful to avoid deadlocks.
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</description>
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<tutorials>
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</tutorials>
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<methods>
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<method name="read_lock">
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<return type="void" />
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<description>
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Locks this [RWLock] for read access, blocks until it is unlocked by the current owner.
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[b]Note:[/b] This function returns without blocking if the thread already has ownership of the rwlock.
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</description>
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</method>
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<method name="read_try_lock">
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<return type="int" enum="Error" />
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<description>
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Tries locking this [RWLock] for read access, but does not block. Returns [constant OK] on success, [constant ERR_BUSY] otherwise.
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[b]Note:[/b] This function returns [constant OK] if the thread already has ownership of the rwlock.
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</description>
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</method>
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<method name="read_unlock">
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<return type="void" />
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<description>
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Unlocks this [RWLock] for read access, leaving it to other threads.
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[b]Note:[/b] If a thread called [method lock] or [method try_lock] multiple times while already having ownership of the rwlock, it must also call [method unlock] the same number of times in order to unlock it correctly.
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</description>
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</method>
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<method name="write_lock">
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<return type="void" />
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<description>
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Locks this [RWLock] for write access, blocks until it is unlocked by the current owner.
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[b]Note:[/b] This function returns without blocking if the thread already has ownership of the rwlock.
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</description>
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</method>
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<method name="write_try_lock">
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<return type="int" enum="Error" />
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<description>
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Tries locking this [RWLock] for write access, but does not block. Returns [constant OK] on success, [constant ERR_BUSY] otherwise.
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[b]Note:[/b] This function returns [constant OK] if the thread already has ownership of the rwlock.
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</description>
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</method>
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<method name="write_unlock">
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<return type="void" />
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<description>
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Unlocks this [RWLock] for write access, leaving it to other threads.
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[b]Note:[/b] If a thread called [method lock] or [method try_lock] multiple times while already having ownership of the rwlock, it must also call [method unlock] the same number of times in order to unlock it correctly.
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</description>
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</method>
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</methods>
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<constants>
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</constants>
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</class>
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