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62 lines
2.1 KiB
ReStructuredText
62 lines
2.1 KiB
ReStructuredText
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.. Generated automatically by doc/tools/makerst.py in Godot's source tree.
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.. DO NOT EDIT THIS FILE, but the Semaphore.xml source instead.
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.. The source is found in doc/classes or modules/<name>/doc_classes.
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.. _class_Semaphore:
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Semaphore
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=========
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**Inherits:** :ref:`Reference<class_Reference>` **<** :ref:`Object<class_Object>`
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A synchronization semaphore.
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Description
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-----------
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A synchronization semaphore which can be used to synchronize multiple :ref:`Thread<class_Thread>`\ s. Initialized to zero on creation. Be careful to avoid deadlocks. For a binary version, see :ref:`Mutex<class_Mutex>`.
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Tutorials
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---------
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- :doc:`../tutorials/performance/using_multiple_threads`
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Methods
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-------
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+---------------------------------------+--------------------------------------------------------------+
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| void | :ref:`post<class_Semaphore_method_post>` **(** **)** |
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+---------------------------------------+--------------------------------------------------------------+
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| :ref:`Error<enum_@GlobalScope_Error>` | :ref:`try_wait<class_Semaphore_method_try_wait>` **(** **)** |
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+---------------------------------------+--------------------------------------------------------------+
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| void | :ref:`wait<class_Semaphore_method_wait>` **(** **)** |
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+---------------------------------------+--------------------------------------------------------------+
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Method Descriptions
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-------------------
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.. _class_Semaphore_method_post:
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- void **post** **(** **)**
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Lowers the ``Semaphore``, allowing one more thread in.
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----
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.. _class_Semaphore_method_try_wait:
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- :ref:`Error<enum_@GlobalScope_Error>` **try_wait** **(** **)**
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Like :ref:`wait<class_Semaphore_method_wait>`, but won't block, so if the value is zero, fails immediately and returns :ref:`@GlobalScope.ERR_BUSY<class_@GlobalScope_constant_ERR_BUSY>`. If non-zero, it returns :ref:`@GlobalScope.OK<class_@GlobalScope_constant_OK>` to report success.
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----
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.. _class_Semaphore_method_wait:
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- void **wait** **(** **)**
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Waits for the ``Semaphore``, if its value is zero, blocks until non-zero.
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