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34 .Nd aligned memory allocation
40 .Fn posix_memalign "void **ptr" "size_t alignment" "size_t size"
42 .Fn aligned_alloc "size_t alignment" "size_t size"
48 bytes of memory such that the allocation's base address is an even multiple of
50 and returns the allocation in the value pointed to by
55 must be a power of 2 at least as large as
58 Memory that is allocated via
60 can be used as an argument in subsequent calls to
70 but it does not have the
72 restriction, takes just
76 and the allocation pointer is returned.
77 .Sh IMPLEMENTATION NOTES
80 function is directly supported by matching the requested alignment against a zone
81 of the slab allocator with a compatible chunking, and using the power-of-2
82 shortcut whenever possible.
83 Alignments beyond those supported by the zone mechanism are still
89 is thus able to take advantage of the slab allocator to produce
90 well-fitted results when the requests are reasonable.
94 function returns the value 0 if successful; otherwise it returns an error value.
97 returns a pointer to the allocated memory if successful; otherwise a
99 pointer is returned and
107 functions will fail if:
112 parameter is not a power of 2 at least as large as
113 .Fn sizeof "void *" .
115 Memory allocation error.