common/vmalloc/vmhdr.h

104 typedef union _head_u	Head_t;
256 	Head_t*		head;
308 **	sizeof(Head_t)%ALIGN == 0
310 ** and	sizeof(Block_t) = sizeof(Head_t)+sizeof(Body_t)
313 {	Head_t	head;
388 #define BLOCK(d)	((Block_t*)((char*)(d) - sizeof(Head_t)) )
414 #define SEGWILD(b)	(((b)->body.data+SIZE(b)+sizeof(Head_t)) >= SEG(b)->baddr)
415 #define VMWILD(vd,b)	(((b)->body.data+SIZE(b)+sizeof(Head_t)) >= vd->seg->baddr)
428 ** So each block requires an extra Head_t.
430 #define PF_EXTRA   sizeof(Head_t)
431 #define PFDATA(d)  ((Head_t*)((Vmuchar_t*)(d)+(SIZE(BLOCK(d))&~BITS)-sizeof(Head_t)) )
447 ** So for each allocated block, we'll need 3 extra Head_t.
451 #define DB_HEAD		(2*sizeof(Head_t))
452 #define DB_TAIL		(2*sizeof(Head_t))
454 #define DBBLOCK(d)	((Block_t*)((Vmuchar_t*)(d) - 3*sizeof(Head_t)) )
456 #define DBSEG(d)	(((Head_t*)((Vmuchar_t*)(d) - sizeof(Head_t)))->head.seg.seg )
457 #define DBSIZE(d)	(((Head_t*)((Vmuchar_t*)(d) - 2*sizeof(Head_t)))->head.size.size )
458 #define DBFILE(d)	(((Head_t*)((Vmuchar_t*)(d) - 2*sizeof(Head_t)))->head.seg.file )
459 #define DBLN(d)		(((Head_t*)((Vmuchar_t*)DBBLOCK(d)+DBBSIZE(d)))->head.size.line )
463 #define DB2BEST(d)	((Vmuchar_t*)(d) - 2*sizeof(Head_t))
464 #define DB2DEBUG(b)	((Vmuchar_t*)(b) + 2*sizeof(Head_t))