Memory allocation: Difference between revisions
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By the typing rules of Haskell, w must have the type 'Ptr Word32' (pointer to 32-bit word), which is how malloc knows how much memory to allocate. |
By the typing rules of Haskell, w must have the type 'Ptr Word32' (pointer to 32-bit word), which is how malloc knows how much memory to allocate. |
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=={{header|Icon}} and {{header|Unicon}}== |
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Icon and Unicon provide fully automatic memory allocation. Memory is allocated when each |
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structure is created and reclaimed after it is no longer referenced. For example: |
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<lang unicon> |
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t := table() # The table's memory is allocated |
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#... do things with t |
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t := &null # The table's memory can be reclaimed |
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</lang> |
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For structures whose only reference is held in a local variable, that reference is removed |
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when the local context is exited (i.e. when procedures return) and the storage is then |
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available for reclaiming. |
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The actual reclamation of unreferenced structures takes place when garbage collection occurs. |
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=={{header|J}}== |
=={{header|J}}== |
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