pureFree

Pure variants of C's memory allocation functions malloc, calloc, and realloc and deallocation function free.

UNIX 98 requires that errno be set to ENOMEM upon failure. Purity is achieved by saving and restoring the value of errno, thus behaving as if it were never changed.

@system pure @nogc nothrow

void

pureFree

()

(

void* ptr

)

Examples

ubyte[] fun(size_t n) pure
{
    void* p = pureMalloc(n);
    p !is null || n == 0 || assert(0);
    scope(failure) p = pureRealloc(p, 0);
    p = pureRealloc(p, n *= 2);
    p !is null || n == 0 || assert(0);
    return cast(ubyte[]) p[0 .. n];
}

auto buf = fun(100);
assert(buf.length == 200);
pureFree(buf.ptr);

pureFree

Examples

See Also