Update implementation details docs re: PTRDIFF_MAX.
Document that the maximum size class is limited by PTRDIFF_MAX, rather
than the full address space. This reflects changes that were part of
0c516a00c4
(Make *allocx() size class
overflow behavior defined.).
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@ -540,8 +540,8 @@ for (i = 0; i < nbins; i++) {
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are smaller than four times the page size, large size classes are smaller
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are smaller than four times the page size, large size classes are smaller
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than the chunk size (see the <link
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than the chunk size (see the <link
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linkend="opt.lg_chunk"><mallctl>opt.lg_chunk</mallctl></link> option), and
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linkend="opt.lg_chunk"><mallctl>opt.lg_chunk</mallctl></link> option), and
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huge size classes extend from the chunk size up to one size class less than
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huge size classes extend from the chunk size up to the largest size class
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the full address space size.</para>
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that does not exceed <constant>PTRDIFF_MAX</constant>.</para>
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<para>Allocations are packed tightly together, which can be an issue for
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<para>Allocations are packed tightly together, which can be an issue for
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multi-threaded applications. If you need to assure that allocations do not
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multi-threaded applications. If you need to assure that allocations do not
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@ -659,7 +659,7 @@ for (i = 0; i < nbins; i++) {
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<entry>[1280 KiB, 1536 KiB, 1792 KiB]</entry>
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<entry>[1280 KiB, 1536 KiB, 1792 KiB]</entry>
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</row>
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</row>
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<row>
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<row>
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<entry morerows="6">Huge</entry>
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<entry morerows="8">Huge</entry>
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<entry>256 KiB</entry>
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<entry>256 KiB</entry>
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<entry>[2 MiB]</entry>
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<entry>[2 MiB]</entry>
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</row>
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</row>
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@ -687,6 +687,14 @@ for (i = 0; i < nbins; i++) {
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<entry>...</entry>
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<entry>...</entry>
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<entry>...</entry>
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<entry>...</entry>
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</row>
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</row>
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<row>
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<entry>512 PiB</entry>
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<entry>[2560 PiB, 3 EiB, 3584 PiB, 4 EiB]</entry>
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</row>
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<row>
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<entry>1 EiB</entry>
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<entry>[5 EiB, 6 EiB, 7 EiB]</entry>
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</row>
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</tbody>
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</tbody>
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</tgroup>
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</tgroup>
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</table>
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</table>
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