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Man Pages
VALLOC(3) FreeBSD Library Functions Manual VALLOC(3)

valloc
aligned memory allocation function

Standard C Library (libc, -lc)

#include <unistd.h>
void *
valloc(size_t size);

The valloc() function is obsoleted by posix_memalign(3), which can be used to request page-aligned allocations.
The valloc() function allocates size bytes aligned on a page boundary.

The valloc() function returns a pointer to the allocated space if successful; otherwise a null pointer is returned.

posix_memalign(3)

The valloc() function appeared in 3.0BSD.
The valloc() function correctly allocated memory that could be deallocated via free() starting in FreeBSD 7.0.
October 30, 2007 FreeBSD 12.0-RELEASE

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