1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
2 /*
3 * Copyright (c) 2013 Sandia National Laboratories. All rights reserved.
4 * Copyright (c) 2014 Los Alamos National Security, LLC. All rights
5 * reserved.
6 * $COPYRIGHT$
7 *
8 * Additional copyrights may follow
9 *
10 * $HEADER$
11 *
12 * Pending frags are fragments that have been received on the target,
13 * but can not yet be processed (because ordering is turned on).
14 * Because receive memory descriptors are precious resources, rather
15 * than keeping a descriptor until the right sequence number, we
16 * instead malloc a buffer (as part of the pending frag) and copy the
17 * message.
18 */
19
20 #ifndef OSC_PT2PT_PENDING_FRAG_H
21 #define OSC_PT2PT_PENDING_FRAG_H
22
23 /** Incoming fragment that has to be queued */
24 struct ompi_osc_pt2pt_pending_frag_t {
25 opal_list_item_t super;
26
27 /* This is a pointer to the top of the fragment (which is always
28 the header). Save as a header to make the casting a bit less
29 onerous during sequence number lookups. */
30 ompi_osc_pt2pt_frag_header_t *header;
31 };
32 typedef struct ompi_osc_pt2pt_pending_frag_t ompi_osc_pt2pt_pending_frag_t;
33 OBJ_CLASS_DECLARATION(ompi_osc_pt2pt_pending_frag_t);
34
35 /*
36 * Note: module lock must be held during this operation
37 */
38 static inline ompi_osc_pt2pt_pending_frag_t*
39 ompi_osc_pt2pt_pending_frag_create(ompi_osc_pt2pt_module_t *module,
40 void *ptr,
41 size_t size)
42 {
43 size_t total_size = sizeof(ompi_osc_pt2pt_pending_frag_t) + size;
44 ompi_osc_pt2pt_pending_frag_t *ret =
45 (ompi_osc_pt2pt_pending_frag_t*) malloc(total_size);
46 if (NULL == ret) return NULL;
47
48 OBJ_CONSTRUCT(&ret, ompi_osc_pt2pt_pending_frag_t);
49 memcpy(ret->header, ptr, size);
50
51 return ret;
52 }
53
54
55 /*
56 * Note: module lock must be held for this operation
57 */
58 static inline int
59 ompi_osc_pt2pt_pending_frag_destroy(ompi_osc_pt2pt_module_t *module,
60 ompi_osc_pt2pt_pending_frag_t* frag)
61 {
62 OBJ_DESTRUCT(&frag);
63 free(frag);
64
65 return OMPI_SUCCESS;
66 }
67
68 #endif