ref: 9b874fb5cb093713f4850c922936cc1d04378303
dir: /sys/src/liboventi/packet.h/
typedef struct Packet Packet; typedef struct Mem Mem; typedef struct Frag Frag; enum { BigMemSize = MaxFragSize, SmallMemSize = BigMemSize/8, NLocalFrag = 2, }; /* position to carve out of a Mem */ enum { PFront, PMiddle, PEnd, }; struct Mem { Lock lk; int ref; uchar *bp; uchar *ep; uchar *rp; uchar *wp; Mem *next; }; enum { FragLocalFree, FragLocalAlloc, FragGlobal, }; struct Frag { int state; Mem *mem; uchar *rp; uchar *wp; Frag *next; }; struct Packet { int size; int asize; /* allocated memmory - always greater than size */ Packet *next; Frag *first; Frag *last; Frag local[NLocalFrag]; };