Memory allocation: Difference between revisions
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Like Perl 5, Perl 6 is intended to run largely stackless, so all allocations are really on the heap, including activation records. Allocations are managed automatically. It is easy enough to allocate a memory buffer of a particular size however, if you really need it: |
Like Perl 5, Perl 6 is intended to run largely stackless, so all allocations are really on the heap, including activation records. Allocations are managed automatically. It is easy enough to allocate a memory buffer of a particular size however, if you really need it: |
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<lang perl6>my $buffer = Buf.new(0 xx 1024);</lang> |
<lang perl6>my $buffer = Buf.new(0 xx 1024);</lang> |
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=={{header|Phix}}== |
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In normal use, memory management is fully automatic in Phix. However you may need to explicitly allocate memory when interfacing to C etc. |
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By default (for compatibility with legacy code) cleanup must be performed manually, but there is an optional flag on both the memory |
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allocation routines (allocate and allocate_string) to automate that for you, or you could even roll your own via delete_routine(). |
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<lang Phix>atom addr = allocate(512) -- limit is 1,610,612,728 bytes on 32-bit systems |
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... |
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free(addr) |
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atom addr2 = allocate(512,1) -- automatically freed when addr2 drops out of scope |
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atom addr3 = allocate_string("a string",1) -- automatically freed when addr3 drops out of scope</lang> |
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Behind the scenes, the Phix stack is actually managed as a linked list of virtual stack blocks allocated on the heap, and as such it |
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would be utterly pointless and quite probably extremely tricky to mess with. |
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=={{header|PicoLisp}}== |
=={{header|PicoLisp}}== |
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Only the heap can be explicitly controlled in PicoLisp. Usually this is not necessary, as it happens automatically. |
Only the heap can be explicitly controlled in PicoLisp. Usually this is not necessary, as it happens automatically. |
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