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#include "vmhdr.h"
/* Get statistics from a region.
**
** Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
*/
#if __STD_C
int vmstat(Vmalloc_t* vm, Vmstat_t* st)
#else
int vmstat(vm, st)
Vmalloc_t* vm;
Vmstat_t* st;
#endif
{
reg Seg_t* seg;
reg Block_t *b, *endb;
reg size_t s;
reg Vmdata_t* vd = vm->data;
if(!st)
return -1;
if(!(vd->mode&VM_TRUST))
{ if(ISLOCK(vd,0))
return -1;
SETLOCK(vd,0);
}
st->n_busy = st->n_free = 0;
st->s_busy = st->s_free = st->m_busy = st->m_free = 0;
st->n_seg = 0;
st->extent = 0;
if(vd->mode&VM_MTLAST)
st->n_busy = 0;
else if((vd->mode&VM_MTPOOL) && (s = vd->pool) > 0)
{ s = ROUND(s,ALIGN);
for(b = vd->free; b; b = SEGLINK(b))
st->n_free += 1;
}
for(seg = vd->seg; seg; seg = seg->next)
{ st->n_seg += 1;
st->extent += seg->extent;
b = SEGBLOCK(seg);
endb = BLOCK(seg->baddr);
if(vd->mode&(VM_MTDEBUG|VM_MTBEST|VM_MTPROFILE))
{ while(b < endb)
{ s = SIZE(b)&~BITS;
if(ISJUNK(SIZE(b)) || !ISBUSY(SIZE(b)))
{ if(s > st->m_free)
st->m_free = s;
st->s_free += s;
st->n_free += 1;
}
else /* get the real size */
{ if(vd->mode&VM_MTDEBUG)
s = DBSIZE(DB2DEBUG(DATA(b)));
else if(vd->mode&VM_MTPROFILE)
s = PFSIZE(DATA(b));
if(s > st->m_busy)
st->m_busy = s;
st->s_busy += s;
st->n_busy += 1;
}
b = (Block_t*)((Vmuchar_t*)DATA(b) + (SIZE(b)&~BITS) );
}
}
else if(vd->mode&VM_MTLAST)
{ if((s = seg->free ? (SIZE(seg->free) + sizeof(Head_t)) : 0) > 0)
{ st->s_free += s;
st->n_free += 1;
}
if((s = ((char*)endb - (char*)b) - s) > 0)
{ st->s_busy += s;
st->n_busy += 1;
}
}
else if((vd->mode&VM_MTPOOL) && s > 0)
{ if(seg->free)
st->n_free += (SIZE(seg->free)+sizeof(Head_t))/s;
st->n_busy += ((seg->baddr - (Vmuchar_t*)b) - sizeof(Head_t))/s;
}
}
if((vd->mode&VM_MTPOOL) && s > 0)
{ st->n_busy -= st->n_free;
if(st->n_busy > 0)
st->s_busy = (st->m_busy = vd->pool)*st->n_busy;
if(st->n_free > 0)
st->s_free = (st->m_free = vd->pool)*st->n_free;
}
CLRLOCK(vd,0);
return 0;
}
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