18   struct _PetscSegBufferLink *head;  member
28   s = seg->head;  in PetscSegBufferAlloc_Private()
37   seg->head         = newlink;  in PetscSegBufferAlloc_Private()
60   struct _PetscSegBufferLink *head;  in PetscSegBufferCreate()  local
64   PetscCall(PetscMalloc(offsetof(struct _PetscSegBufferLink, u) + expected * unitbytes, &head));  in PetscSegBufferCreate()
65   PetscCall(PetscMemzero(head, offsetof(struct _PetscSegBufferLink, u)));  in PetscSegBufferCreate()
67   head->alloc       = expected;  in PetscSegBufferCreate()
69   (*seg)->head      = head;  in PetscSegBufferCreate()
95   s = seg->head;  in PetscSegBufferGet()
97   s             = seg->head;  in PetscSegBufferGet()
121   for (s = (*seg)->head; s;) {  in PetscSegBufferDestroy()
152   s         = seg->head;  in PetscSegBufferExtractTo()
194   s = seg->head;  in PetscSegBufferExtractAlloc()
219   struct _PetscSegBufferLink *head;  in PetscSegBufferExtractInPlace()  local
222   head = seg->head;  in PetscSegBufferExtractInPlace()
223   if (PetscUnlikely(head->tail)) {  in PetscSegBufferExtractInPlace()
226     PetscCall(PetscSegBufferCreate(seg->unitbytes, head->used + head->tailused, &newseg));  in PetscSegBufferExtractInPlace()
227     PetscCall(PetscSegBufferExtractTo(seg, newseg->head->u.array));  in PetscSegBufferExtractInPlace()
228     seg->head    = newseg->head;  in PetscSegBufferExtractInPlace()
229     newseg->head = head;  in PetscSegBufferExtractInPlace()
231     head = seg->head;  in PetscSegBufferExtractInPlace()
233   if (contig) *(char **)contig = head->u.array;  in PetscSegBufferExtractInPlace()
234   head->used = 0;  in PetscSegBufferExtractInPlace()
256   *usedsize = seg->head->tailused + seg->head->used;  in PetscSegBufferGetSize()
275   struct _PetscSegBufferLink *head;  in PetscSegBufferUnuse()  local
278   head = seg->head;  in PetscSegBufferUnuse()
279 …head->used >= unused, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Attempt to return more unused en…  in PetscSegBufferUnuse()
280   head->used -= unused;  in PetscSegBufferUnuse()