#include	"vmhdr.h"

/*	Walks all segments created in region(s)
**
**	Written by Kiem-Phong Vo, kpv@research.att.com (02/08/96)
*/

#if __STD_C
int vmwalk(Vmalloc_t* vm, int(*segf)(Vmalloc_t*, Void_t*, size_t, Vmdisc_t*) )
#else
int vmwalk(vm, segf)
Vmalloc_t*	vm;
int(*		segf)(/* Vmalloc_t*, Void_t*, size_t, Vmdisc_t* */);
#endif
{	
	reg Seg_t*	seg;
	reg int		rv;

	if(!vm)
	{	for(vm = Vmheap; vm; vm = vm->next)
		{	if(!(vm->data->mode&VM_TRUST) && ISLOCK(vm->data,0) )
				continue;

			SETLOCK(vm->data,0);
			for(seg = vm->data->seg; seg; seg = seg->next)
			{	rv = (*segf)(vm, seg->addr, seg->extent, vm->disc);
				if(rv < 0)
					return rv;
			}
			CLRLOCK(vm->data,0);
		}
	}
	else
	{	if(!(vm->data->mode&VM_TRUST) && ISLOCK(vm->data,0) )
			return -1;

		SETLOCK(vm->data,0);
		for(seg = vm->data->seg; seg; seg = seg->next)
		{	rv = (*segf)(vm, seg->addr, seg->extent, vm->disc);
			if(rv < 0)
				return rv;
		}
		CLRLOCK(vm->data,0);
	}

	return 0;
}
