elks-enhanced - XT-Emporium

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#include <errno.h>
#include <malloc.h>
#include <unistd.h>

#include "_malloc.h"

void __wcnear *
__mini_malloc(size_t size)
{
	mem __wcnear *ptr;

#if 0       /* not required and slow, initial break always even */
	size_t sz;
	/* First time round this _might_ be odd, But we won't do that! */
	sz = (size_t)sbrk(0);
	if(sz & (sizeof(mem) - 1))
		sbrk(4 - (sz & (sizeof(mem) - 1)));
#endif

	size += sizeof(mem) * 2 - 1;	/* Round up and leave space for size field */

	/* Minor oops here, sbrk has a signed argument */
	if((int)size <= 0 || size > (((unsigned)-1) >> 1) - sizeof(mem) * 3)
	{
		errno = ENOMEM;
		return 0;
	}

	size /= sizeof(mem);
	ptr = (mem __wcnear *) sbrk(size * sizeof(mem));
	if ((int)ptr == -1) {
		debug("SBRK FAIL", 0);
		return 0;
	}
	m_size(ptr) = size;
	debug("SBRK", ptr);
	return ptr + 1;
}

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