1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2007 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2006 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#ifndef OMPI_WIN_H
#define OMPI_WIN_H
#include "ompi_config.h"
#include "mpi.h"
#include "opal/class/opal_object.h"
#include "opal/class/opal_hash_table.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/info/info.h"
#include "ompi/communicator/communicator.h"
#include "ompi/group/group.h"
#include "ompi/mca/osc/osc.h"
BEGIN_C_DECLS
/* flags */
#define OMPI_WIN_FREED 0x00000001
#define OMPI_WIN_INVALID 0x00000002
#define OMPI_WIN_NO_LOCKS 0x00000004
/* mode */
#define OMPI_WIN_ACCESS_EPOCH 0x00000001
#define OMPI_WIN_EXPOSE_EPOCH 0x00000002
#define OMPI_WIN_FENCE 0x00000010
#define OMPI_WIN_POSTED 0x00000020
#define OMPI_WIN_STARTED 0x00000040
#define OMPI_WIN_LOCK_ACCESS 0x00000080
OMPI_DECLSPEC extern opal_pointer_array_t ompi_mpi_windows;
struct ompi_win_t {
opal_object_t w_base;
opal_mutex_t w_lock;
char w_name[MPI_MAX_OBJECT_NAME];
/* Group associated with this window. */
ompi_group_t *w_group;
/* Information about the state of the window. */
uint16_t w_flags;
/* Attributes */
opal_hash_table_t *w_keyhash;
/* index in Fortran <-> C translation array */
int w_f_to_c_index;
/* Error handling. This field does not have the "w_" prefix so
that the OMPI_ERRHDL_* macros can find it, regardless of
whether it's a comm, window, or file. */
ompi_errhandler_t *error_handler;
ompi_errhandler_type_t errhandler_type;
/* displacement factor */
int w_disp_unit;
void *w_baseptr;
size_t w_size;
/** Current epoch / mode (access, expose, lock, etc.). Checked by
the argument checking code in the MPI layer, set by the OSC
component. Modified without locking w_lock. */
volatile uint16_t w_mode;
/* one sided interface */
ompi_osc_base_module_t *w_osc_module;
};
typedef struct ompi_win_t ompi_win_t;
OMPI_DECLSPEC OBJ_CLASS_DECLARATION(ompi_win_t);
/**
* Padded struct to maintain back compatibiltiy.
* See ompi/communicator/communicator.h comments with struct ompi_communicator_t
* for full explanation why we chose the following padding construct for predefines.
*/
#define PREDEFINED_WIN_PAD (sizeof(void*) * 64)
struct ompi_predefined_win_t {
struct ompi_win_t win;
char padding[PREDEFINED_WIN_PAD - sizeof(ompi_win_t)];
};
typedef struct ompi_predefined_win_t ompi_predefined_win_t;
OMPI_DECLSPEC extern ompi_predefined_win_t ompi_mpi_win_null;
int ompi_win_init(void);
int ompi_win_finalize(void);
int ompi_win_create(void *base, size_t size, int disp_unit,
ompi_communicator_t *comm, ompi_info_t *info,
ompi_win_t **newwin);
int ompi_win_free(ompi_win_t *win);
OMPI_DECLSPEC int ompi_win_set_name(ompi_win_t *win, char *win_name);
OMPI_DECLSPEC int ompi_win_get_name(ompi_win_t *win, char *win_name, int *length);
OMPI_DECLSPEC int ompi_win_group(ompi_win_t *win, ompi_group_t **group);
/* Note that the defintion of an "invalid" window is closely related
to the defintion of an "invalid" communicator. See a big comment
in ompi/communicator/communicator.h about this. */
static inline int ompi_win_invalid(ompi_win_t *win) {
if (NULL == win ||
MPI_WIN_NULL == win ||
(OMPI_WIN_INVALID & win->w_flags) ||
(OMPI_WIN_FREED & win->w_flags)) {
return true;
} else {
return false;
}
}
static inline int ompi_win_peer_invalid(ompi_win_t *win, int peer) {
if (win->w_group->grp_proc_count <= peer) return true;
return false;
}
static inline int ompi_win_rank(ompi_win_t *win) {
return win->w_group->grp_my_rank;
}
static inline bool ompi_win_allow_locks(ompi_win_t *win) {
return (0 == (win->w_flags & OMPI_WIN_NO_LOCKS));
}
static inline int16_t ompi_win_get_mode(ompi_win_t *win) {
int16_t mode = win->w_mode;
opal_atomic_rmb();
return mode;
}
static inline void ompi_win_set_mode(ompi_win_t *win, int16_t mode) {
win->w_mode = mode;
opal_atomic_wmb();
}
static inline void ompi_win_append_mode(ompi_win_t *win, int16_t mode) {
win->w_mode |= mode;
opal_atomic_wmb();
}
static inline void ompi_win_remove_mode(ompi_win_t *win,
int16_t mode)
{
win->w_mode &= ~mode;
opal_atomic_wmb();
}
/* already in an access epoch */
static inline bool ompi_win_access_epoch(ompi_win_t *win) {
int16_t mode = ompi_win_get_mode(win);
return (0 != (OMPI_WIN_ACCESS_EPOCH & mode) ? true : false);
}
/* already in an exposure epoch */
static inline bool ompi_win_exposure_epoch(ompi_win_t *win) {
int16_t mode = ompi_win_get_mode(win);
return (0 != (OMPI_WIN_EXPOSE_EPOCH & mode) ? true : false);
}
/* we're either already in an access epoch or can easily start one
(stupid fence rule). Either way, it's ok to be the origin of a
communication call. */
static inline bool ompi_win_comm_allowed(ompi_win_t *win) {
int16_t mode = ompi_win_get_mode(win);
return (0 != (OMPI_WIN_ACCESS_EPOCH & mode || OMPI_WIN_FENCE & mode) ? true : false);
}
END_C_DECLS
#endif
|
