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ALLOCA(3) Library Functions Manual ALLOCA(3)

alloca — memory allocator

#include <stdlib.h>

void *
alloca(size_t size);

The () function allocates size bytes of space in the stack frame of the caller. This temporary space is automatically freed on return.

The alloca() function returns a pointer to the beginning of the allocated space. If the allocation failed, a NULL pointer is returned.

brk(2), pagesize(2) calloc(3), malloc(3), realloc(3),

The alloca() function is machine dependent; its use is discouraged.

BSD 4 June 4, 1993 ALLOCA(3)