Memory allocation: Difference between revisions
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→{{header|Phix}}: added syntax colouring the hard way, phix/basics
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=={{header|Phix}}==
{{libheader|Phix/basics}}
In normal use, memory management is fully automatic in Phix. However you may need to explicitly allocate memory when interfacing to C etc.
By default (for compatibility with legacy code) cleanup must be performed manually, but there is an optional flag on both the memory
allocation routines (allocate and allocate_string) to automate that for you, or you could even roll your own via delete_routine().
<!--<lang Phix>-->
<span style="color: #004080;">atom</span> <span style="color: #000000;">addr</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">allocate</span><span style="color: #0000FF;">(</span><span style="color: #000000;">512</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- limit is 1,610,612,728 bytes on 32-bit systems</span>
<span style="color: #0000FF;">...</span>
<span style="color: #7060A8;">free</span><span style="color: #0000FF;">(</span><span style="color: #000000;">addr</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">addr2</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">allocate</span><span style="color: #0000FF;">(</span><span style="color: #000000;">512</span><span style="color: #0000FF;">,</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- automatically freed when addr2 drops out of scope or re-assigned</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">addr3</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">allocate_string</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"a string"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- automatically freed when addr3 drops out of scope or re-assigned</span>
<!--</lang>-->
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
would be utterly pointless and quite probably extremely tricky to mess with.
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