OpenMPI  0.1.1
dss_internal.h
1 /* -*- C -*-
2  *
3  * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
4  * University Research and Technology
5  * Corporation. All rights reserved.
6  * Copyright (c) 2004-2006 The University of Tennessee and The University
7  * of Tennessee Research Foundation. All rights
8  * reserved.
9  * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
10  * University of Stuttgart. All rights reserved.
11  * Copyright (c) 2004-2005 The Regents of the University of California.
12  * All rights reserved.
13  * $COPYRIGHT$
14  *
15  * Additional copyrights may follow
16  *
17  * $HEADER$
18  *
19  */
20 #ifndef OPAL_DSS_INTERNAL_H_
21 #define OPAL_DSS_INTERNAL_H_
22 
23 #include "opal_config.h"
24 #include "opal/constants.h"
25 
27 
28 #include "opal/dss/dss.h"
29 
30 #ifdef HAVE_STRING_H
31 # if !defined(STDC_HEADERS) && HAVE_MEMORY_H
32 # include <memory.h>
33 # endif
34 # include <string.h>
35 #endif
36 
37 BEGIN_C_DECLS
38 
39 /*
40  * The default starting chunk size
41  */
42 #define OPAL_DSS_DEFAULT_INITIAL_SIZE 128
43 /*
44  * The default threshold size when we switch from doubling the
45  * buffer size to addatively increasing it
46  */
47 #define OPAL_DSS_DEFAULT_THRESHOLD_SIZE 1024
48 
49 /*
50  * Internal type corresponding to size_t. Do not use this in
51  * interface calls - use OPAL_SIZE instead.
52  */
53 #if SIZEOF_SIZE_T == 1
54 #define DSS_TYPE_SIZE_T OPAL_UINT8
55 #elif SIZEOF_SIZE_T == 2
56 #define DSS_TYPE_SIZE_T OPAL_UINT16
57 #elif SIZEOF_SIZE_T == 4
58 #define DSS_TYPE_SIZE_T OPAL_UINT32
59 #elif SIZEOF_SIZE_T == 8
60 #define DSS_TYPE_SIZE_T OPAL_UINT64
61 #else
62 #error Unsupported size_t size!
63 #endif
64 
65 /*
66  * Internal type corresponding to bool. Do not use this in interface
67  * calls - use OPAL_BOOL instead.
68  */
69 #if SIZEOF_BOOL == 1
70 #define DSS_TYPE_BOOL OPAL_UINT8
71 #elif SIZEOF_BOOL == 2
72 #define DSS_TYPE_BOOL OPAL_UINT16
73 #elif SIZEOF_BOOL == 4
74 #define DSS_TYPE_BOOL OPAL_UINT32
75 #elif SIZEOF_BOOL == 8
76 #define DSS_TYPE_BOOL OPAL_UINT64
77 #else
78 #error Unsupported bool size!
79 #endif
80 
81 /*
82  * Internal type corresponding to int and unsigned int. Do not use
83  * this in interface calls - use OPAL_INT / OPAL_UINT instead.
84  */
85 #if SIZEOF_INT == 1
86 #define DSS_TYPE_INT OPAL_INT8
87 #define DSS_TYPE_UINT OPAL_UINT8
88 #elif SIZEOF_INT == 2
89 #define DSS_TYPE_INT OPAL_INT16
90 #define DSS_TYPE_UINT OPAL_UINT16
91 #elif SIZEOF_INT == 4
92 #define DSS_TYPE_INT OPAL_INT32
93 #define DSS_TYPE_UINT OPAL_UINT32
94 #elif SIZEOF_INT == 8
95 #define DSS_TYPE_INT OPAL_INT64
96 #define DSS_TYPE_UINT OPAL_UINT64
97 #else
98 #error Unsupported int size!
99 #endif
100 
101 /*
102  * Internal type corresponding to pid_t. Do not use this in interface
103  * calls - use OPAL_PID instead.
104  */
105 #if SIZEOF_PID_T == 1
106 #define DSS_TYPE_PID_T OPAL_UINT8
107 #elif SIZEOF_PID_T == 2
108 #define DSS_TYPE_PID_T OPAL_UINT16
109 #elif SIZEOF_PID_T == 4
110 #define DSS_TYPE_PID_T OPAL_UINT32
111 #elif SIZEOF_PID_T == 8
112 #define DSS_TYPE_PID_T OPAL_UINT64
113 #else
114 #error Unsupported pid_t size!
115 #endif
116 
117 /* Unpack generic size macros */
118 #define UNPACK_SIZE_MISMATCH(unpack_type, remote_type, ret) \
119 do { \
120  switch(remote_type) { \
121  case OPAL_UINT8: \
122  UNPACK_SIZE_MISMATCH_FOUND(unpack_type, uint8_t, remote_type); \
123  break; \
124  case OPAL_INT8: \
125  UNPACK_SIZE_MISMATCH_FOUND(unpack_type, int8_t, remote_type); \
126  break; \
127  case OPAL_UINT16: \
128  UNPACK_SIZE_MISMATCH_FOUND(unpack_type, uint16_t, remote_type); \
129  break; \
130  case OPAL_INT16: \
131  UNPACK_SIZE_MISMATCH_FOUND(unpack_type, int16_t, remote_type); \
132  break; \
133  case OPAL_UINT32: \
134  UNPACK_SIZE_MISMATCH_FOUND(unpack_type, uint32_t, remote_type); \
135  break; \
136  case OPAL_INT32: \
137  UNPACK_SIZE_MISMATCH_FOUND(unpack_type, int32_t, remote_type); \
138  break; \
139  case OPAL_UINT64: \
140  UNPACK_SIZE_MISMATCH_FOUND(unpack_type, uint64_t, remote_type); \
141  break; \
142  case OPAL_INT64: \
143  UNPACK_SIZE_MISMATCH_FOUND(unpack_type, int64_t, remote_type); \
144  break; \
145  default: \
146  ret = OPAL_ERR_NOT_FOUND; \
147  } \
148 } while (0)
149 
150 /* NOTE: do not need to deal with endianness here, as the unpacking of
151 the underling sender-side type will do that for us. Repeat: the
152 data in tmpbuf[] is already in host byte order. */
153 #define UNPACK_SIZE_MISMATCH_FOUND(unpack_type, tmptype, tmpdsstype) \
154 do { \
155  int32_t i; \
156  tmptype *tmpbuf = (tmptype*)malloc(sizeof(tmptype) * (*num_vals)); \
157  ret = opal_dss_unpack_buffer(buffer, tmpbuf, num_vals, tmpdsstype); \
158  for (i = 0 ; i < *num_vals ; ++i) { \
159  ((unpack_type*) dest)[i] = (unpack_type)(tmpbuf[i]); \
160  } \
161  free(tmpbuf); \
162 } while (0)
163 
164 
165 /**
166  * Internal struct used for holding registered dss functions
167  */
169  opal_object_t super;
170  /* type identifier */
171  opal_data_type_t odti_type;
172  /** Debugging string name */
173  char *odti_name;
174  /** Pack function */
176  /** Unpack function */
178  /** copy function */
180  /** compare function */
182  /** size function */
184  /** print function */
186  /** Release function */
188  /** flag to indicate structured data */
190 };
191 /**
192  * Convenience typedef
193  */
196 
197 /*
198  * globals needed within dss
199  */
200 extern bool opal_dss_initialized;
201 extern bool opal_dss_debug;
202 extern int opal_dss_verbose;
203 extern int opal_dss_initial_size;
204 extern int opal_dss_threshold_size;
205 extern opal_pointer_array_t opal_dss_types;
206 extern opal_data_type_t opal_dss_num_reg_types;
207 
208  /*
209  * Implementations of API functions
210  */
211 
212  int opal_dss_set(opal_dss_value_t *value, void *new_value, opal_data_type_t type);
213 
214  int opal_dss_get(void **data, opal_dss_value_t *value, opal_data_type_t type);
215 
216  int opal_dss_set_buffer_type(opal_buffer_t *buffer, opal_dss_buffer_type_t type);
217 
218  int opal_dss_pack(opal_buffer_t *buffer, const void *src,
219  int32_t num_vals,
220  opal_data_type_t type);
221  int opal_dss_unpack(opal_buffer_t *buffer, void *dest,
222  int32_t *max_num_vals,
223  opal_data_type_t type);
224 
225  int opal_dss_copy(void **dest, void *src, opal_data_type_t type);
226 
227  int opal_dss_compare(const void *value1, const void *value2,
228  opal_data_type_t type);
229 
230  int opal_dss_print(char **output, char *prefix, void *src, opal_data_type_t type);
231 
232  int opal_dss_dump(int output_stream, void *src, opal_data_type_t type);
233 
234  int opal_dss_size(size_t *size, void *src, opal_data_type_t type);
235 
236  int opal_dss_peek(opal_buffer_t *buffer, opal_data_type_t *type,
237  int32_t *number);
238 
239  int opal_dss_peek_type(opal_buffer_t *buffer, opal_data_type_t *type);
240 
241  int opal_dss_unload(opal_buffer_t *buffer, void **payload,
242  int32_t *bytes_used);
243  int opal_dss_load(opal_buffer_t *buffer, void *payload, int32_t bytes_used);
244 
245  int opal_dss_copy_payload(opal_buffer_t *dest, opal_buffer_t *src);
246 
247  int opal_dss_register(opal_dss_pack_fn_t pack_fn,
248  opal_dss_unpack_fn_t unpack_fn,
249  opal_dss_copy_fn_t copy_fn,
250  opal_dss_compare_fn_t compare_fn,
251  opal_dss_size_fn_t size_fn,
252  opal_dss_print_fn_t print_fn,
253  opal_dss_release_fn_t release_fn,
254  bool structured,
255  const char *name, opal_data_type_t *type);
256 
257  void opal_dss_release(opal_dss_value_t *value);
258 
259  char *opal_dss_lookup_data_type(opal_data_type_t type);
260 
261  void opal_dss_dump_data_types(int output);
262 
263  /*
264  * Specialized functions
265  */
266 OPAL_DECLSPEC int opal_dss_pack_buffer(opal_buffer_t *buffer, const void *src,
267  int32_t num_vals, opal_data_type_t type);
268 
269 OPAL_DECLSPEC int opal_dss_unpack_buffer(opal_buffer_t *buffer, void *dst,
270  int32_t *num_vals, opal_data_type_t type);
271 
272  /*
273  * Internal pack functions
274  */
275 
276  int opal_dss_pack_null(opal_buffer_t *buffer, const void *src,
277  int32_t num_vals, opal_data_type_t type);
278  int opal_dss_pack_byte(opal_buffer_t *buffer, const void *src,
279  int32_t num_vals, opal_data_type_t type);
280 
281  int opal_dss_pack_bool(opal_buffer_t *buffer, const void *src,
282  int32_t num_vals, opal_data_type_t type);
283 
284  int opal_dss_pack_int(opal_buffer_t *buffer, const void *src,
285  int32_t num_vals, opal_data_type_t type);
286  int opal_dss_pack_int16(opal_buffer_t *buffer, const void *src,
287  int32_t num_vals, opal_data_type_t type);
288  int opal_dss_pack_int32(opal_buffer_t *buffer, const void *src,
289  int32_t num_vals, opal_data_type_t type);
290  int opal_dss_pack_int64(opal_buffer_t *buffer, const void *src,
291  int32_t num_vals, opal_data_type_t type);
292 
293  int opal_dss_pack_sizet(opal_buffer_t *buffer, const void *src,
294  int32_t num_vals, opal_data_type_t type);
295 
296  int opal_dss_pack_pid(opal_buffer_t *buffer, const void *src,
297  int32_t num_vals, opal_data_type_t type);
298 
299  int opal_dss_pack_string(opal_buffer_t *buffer, const void *src,
300  int32_t num_vals, opal_data_type_t type);
301 
302  int opal_dss_pack_data_type(opal_buffer_t *buffer, const void *src,
303  int32_t num_vals, opal_data_type_t type);
304 
305  int opal_dss_pack_data_value(opal_buffer_t *buffer, const void *src,
306  int32_t num_vals, opal_data_type_t type);
307 
308  int opal_dss_pack_byte_object(opal_buffer_t *buffer, const void *src,
309  int32_t num_vals, opal_data_type_t type);
310 
311  int opal_dss_pack_pstat(opal_buffer_t *buffer, const void *src,
312  int32_t num_vals, opal_data_type_t type);
313 
314  int opal_dss_pack_node_stat(opal_buffer_t *buffer, const void *src,
315  int32_t num_vals, opal_data_type_t type);
316 
317  /*
318  * Internal unpack functions
319  */
320 
321  int opal_dss_unpack_null(opal_buffer_t *buffer, void *dest,
322  int32_t *num_vals, opal_data_type_t type);
323  int opal_dss_unpack_byte(opal_buffer_t *buffer, void *dest,
324  int32_t *num_vals, opal_data_type_t type);
325 
326  int opal_dss_unpack_bool(opal_buffer_t *buffer, void *dest,
327  int32_t *num_vals, opal_data_type_t type);
328 
329  int opal_dss_unpack_int(opal_buffer_t *buffer, void *dest,
330  int32_t *num_vals, opal_data_type_t type);
331  int opal_dss_unpack_int16(opal_buffer_t *buffer, void *dest,
332  int32_t *num_vals, opal_data_type_t type);
333  int opal_dss_unpack_int32(opal_buffer_t *buffer, void *dest,
334  int32_t *num_vals, opal_data_type_t type);
335  int opal_dss_unpack_int64(opal_buffer_t *buffer, void *dest,
336  int32_t *num_vals, opal_data_type_t type);
337 
338  int opal_dss_unpack_sizet(opal_buffer_t *buffer, void *dest,
339  int32_t *num_vals, opal_data_type_t type);
340 
341  int opal_dss_unpack_pid(opal_buffer_t *buffer, void *dest,
342  int32_t *num_vals, opal_data_type_t type);
343 
344  int opal_dss_unpack_string(opal_buffer_t *buffer, void *dest,
345  int32_t *num_vals, opal_data_type_t type);
346 
347  int opal_dss_unpack_data_type(opal_buffer_t *buffer, void *dest,
348  int32_t *num_vals, opal_data_type_t type);
349 
350  int opal_dss_unpack_data_value(opal_buffer_t *buffer, void *dest,
351  int32_t *num_vals, opal_data_type_t type);
352 
353  int opal_dss_unpack_byte_object(opal_buffer_t *buffer, void *dest,
354  int32_t *num_vals, opal_data_type_t type);
355 
356  int opal_dss_unpack_pstat(opal_buffer_t *buffer, void *dest,
357  int32_t *num_vals, opal_data_type_t type);
358 
359  int opal_dss_unpack_node_stat(opal_buffer_t *buffer, void *dest,
360  int32_t *num_vals, opal_data_type_t type);
361 
362  /*
363  * Internal copy functions
364  */
365 
366  int opal_dss_std_copy(void **dest, void *src, opal_data_type_t type);
367 
368  int opal_dss_copy_null(char **dest, char *src, opal_data_type_t type);
369 
370  int opal_dss_copy_string(char **dest, char *src, opal_data_type_t type);
371 
372  int opal_dss_copy_byte_object(opal_byte_object_t **dest, opal_byte_object_t *src,
373  opal_data_type_t type);
374 
375  int opal_dss_copy_data_value(opal_dss_value_t **dest, opal_dss_value_t *src,
376  opal_data_type_t type);
377 
378  int opal_dss_copy_pstat(opal_pstats_t **dest, opal_pstats_t *src,
379  opal_data_type_t type);
380 
381  int opal_dss_copy_node_stat(opal_node_stats_t **dest, opal_node_stats_t *src,
382  opal_data_type_t type);
383 
384  /*
385  * Internal compare functions
386  */
387 
388  int opal_dss_compare_bool(bool *value1, bool *value2, opal_data_type_t type);
389 
390  int opal_dss_compare_int(int *value1, int *value2, opal_data_type_t type);
391  int opal_dss_compare_uint(unsigned int *value1, unsigned int *value2, opal_data_type_t type);
392 
393  int opal_dss_compare_size(size_t *value1, size_t *value2, opal_data_type_t type);
394 
395  int opal_dss_compare_pid(pid_t *value1, pid_t *value2, opal_data_type_t type);
396 
397  int opal_dss_compare_byte(char *value1, char *value2, opal_data_type_t type);
398  int opal_dss_compare_char(char *value1, char *value2, opal_data_type_t type);
399  int opal_dss_compare_int8(int8_t *value1, int8_t *value2, opal_data_type_t type);
400  int opal_dss_compare_uint8(uint8_t *value1, uint8_t *value2, opal_data_type_t type);
401 
402  int opal_dss_compare_int16(int16_t *value1, int16_t *value2, opal_data_type_t type);
403  int opal_dss_compare_uint16(uint16_t *value1, uint16_t *value2, opal_data_type_t type);
404 
405  int opal_dss_compare_int32(int32_t *value1, int32_t *value2, opal_data_type_t type);
406  int opal_dss_compare_uint32(uint32_t *value1, uint32_t *value2, opal_data_type_t type);
407 
408  int opal_dss_compare_int64(int64_t *value1, int64_t *value2, opal_data_type_t type);
409  int opal_dss_compare_uint64(uint64_t *value1, uint64_t *value2, opal_data_type_t type);
410 
411  int opal_dss_compare_null(char *value1, char *value2, opal_data_type_t type);
412 
413  int opal_dss_compare_string(char *value1, char *value2, opal_data_type_t type);
414 
415  int opal_dss_compare_dt(opal_data_type_t *value1, opal_data_type_t *value2, opal_data_type_t type);
416 
417  int opal_dss_compare_data_value(opal_dss_value_t *value1, opal_dss_value_t *value2, opal_data_type_t type);
418 
419  int opal_dss_compare_byte_object(opal_byte_object_t *value1, opal_byte_object_t *value2, opal_data_type_t type);
420 
421  int opal_dss_compare_pstat(opal_pstats_t *value1, opal_pstats_t *value2, opal_data_type_t type);
422 
423  int opal_dss_compare_node_stat(opal_node_stats_t *value1, opal_node_stats_t *value2, opal_data_type_t type);
424 
425  /*
426  * Internal size functions
427  */
428  int opal_dss_std_size(size_t *size, void *src, opal_data_type_t type);
429 
430  int opal_dss_size_string(size_t *size, char *src, opal_data_type_t type);
431 
432  int opal_dss_size_data_value(size_t *size, opal_dss_value_t *src, opal_data_type_t type);
433 
434  int opal_dss_size_byte_object(size_t *size, opal_byte_object_t *src, opal_data_type_t type);
435 
436  int opal_dss_size_pstat(size_t *size, opal_pstats_t *src, opal_data_type_t type);
437 
438  int opal_dss_size_node_stat(size_t *size, opal_node_stats_t *src, opal_data_type_t type);
439 
440  /*
441  * Internal print functions
442  */
443  int opal_dss_print_byte(char **output, char *prefix, uint8_t *src, opal_data_type_t type);
444 
445  int opal_dss_print_string(char **output, char *prefix, char *src, opal_data_type_t type);
446 
447  int opal_dss_print_size(char **output, char *prefix, size_t *src, opal_data_type_t type);
448  int opal_dss_print_pid(char **output, char *prefix, pid_t *src, opal_data_type_t type);
449  int opal_dss_print_bool(char **output, char *prefix, bool *src, opal_data_type_t type);
450  int opal_dss_print_int(char **output, char *prefix, int *src, opal_data_type_t type);
451  int opal_dss_print_uint(char **output, char *prefix, int *src, opal_data_type_t type);
452  int opal_dss_print_uint8(char **output, char *prefix, uint8_t *src, opal_data_type_t type);
453  int opal_dss_print_uint16(char **output, char *prefix, uint16_t *src, opal_data_type_t type);
454  int opal_dss_print_uint32(char **output, char *prefix, uint32_t *src, opal_data_type_t type);
455  int opal_dss_print_int8(char **output, char *prefix, int8_t *src, opal_data_type_t type);
456  int opal_dss_print_int16(char **output, char *prefix, int16_t *src, opal_data_type_t type);
457  int opal_dss_print_int32(char **output, char *prefix, int32_t *src, opal_data_type_t type);
458 #ifdef HAVE_INT64_T
459  int opal_dss_print_uint64(char **output, char *prefix, uint64_t *src, opal_data_type_t type);
460  int opal_dss_print_int64(char **output, char *prefix, int64_t *src, opal_data_type_t type);
461 #else
462  int opal_dss_print_uint64(char **output, char *prefix, void *src, opal_data_type_t type);
463  int opal_dss_print_int64(char **output, char *prefix, void *src, opal_data_type_t type);
464 #endif
465  int opal_dss_print_null(char **output, char *prefix, void *src, opal_data_type_t type);
466  int opal_dss_print_data_type(char **output, char *prefix, opal_data_type_t *src, opal_data_type_t type);
467  int opal_dss_print_data_value(char **output, char *prefix, opal_dss_value_t *src, opal_data_type_t type);
468  int opal_dss_print_byte_object(char **output, char *prefix, opal_byte_object_t *src, opal_data_type_t type);
469  int opal_dss_print_pstat(char **output, char *prefix, opal_pstats_t *src, opal_data_type_t type);
470  int opal_dss_print_node_stat(char **output, char *prefix, opal_node_stats_t *src, opal_data_type_t type);
471 
472 
473  /*
474  * Internal release functions
475  */
476  void opal_dss_std_release(opal_dss_value_t *value);
477 
478  void opal_dss_std_obj_release(opal_dss_value_t *value);
479 
480  void opal_dss_release_byte_object(opal_dss_value_t *value);
481 
482  /*
483  * Internal helper functions
484  */
485 
486  char* opal_dss_buffer_extend(opal_buffer_t *bptr, size_t bytes_to_add);
487 
488  bool opal_dss_too_small(opal_buffer_t *buffer, size_t bytes_reqd);
489 
490  opal_dss_type_info_t* opal_dss_find_type(opal_data_type_t type);
491 
492  int opal_dss_store_data_type(opal_buffer_t *buffer, opal_data_type_t type);
493 
494  int opal_dss_get_data_type(opal_buffer_t *buffer, opal_data_type_t *type);
495 
496 END_C_DECLS
497 
498 #endif
dynamic pointer array
Definition: opal_pointer_array.h:45
int(* opal_dss_copy_fn_t)(void **dest, void *src, opal_data_type_t type)
Copy a data value from one location to another.
Definition: dss.h:382
opal_dss_pack_fn_t odti_pack_fn
Pack function.
Definition: dss_internal.h:175
See opal_bitmap.h for an explanation of why there is a split between OPAL and ORTE for this generic c...
opal_dss_release_fn_t odti_release_fn
Release function.
Definition: dss_internal.h:187
int(* opal_dss_unpack_fn_t)(opal_buffer_t *buffer, void *dest, int32_t *max_num_values, opal_data_type_t type)
Unpack values from a buffer.
Definition: dss.h:212
Definition: dss_types.h:121
Definition: dss_types.h:89
int(* opal_dss_size_fn_t)(size_t *size, void *src, opal_data_type_t type)
Compute size of data value.
Definition: dss.h:423
bool odti_structured
flag to indicate structured data
Definition: dss_internal.h:189
opal_dss_compare_fn_t odti_compare_fn
compare function
Definition: dss_internal.h:181
void(* opal_dss_release_fn_t)(opal_dss_value_t *value)
Release the storage used by a data value.
Definition: dss.h:494
opal_dss_unpack_fn_t odti_unpack_fn
Unpack function.
Definition: dss_internal.h:177
int(* opal_dss_compare_fn_t)(const void *value1, const void *value2, opal_data_type_t type)
Compare two data values.
Definition: dss.h:397
int(* opal_dss_print_fn_t)(char **output, char *prefix, void *src, opal_data_type_t type)
Print a data value.
Definition: dss.h:437
opal_dss_copy_fn_t odti_copy_fn
copy function
Definition: dss_internal.h:179
Base object.
Definition: opal_object.h:182
opal_dss_size_fn_t odti_size_fn
size function
Definition: dss_internal.h:183
Definition: dss_types.h:100
uint8_t opal_dss_buffer_type_t
buffer type
Definition: dss_types.h:148
Structure for holding a buffer to be used with the RML or OOB subsystems.
Definition: dss_types.h:159
Definition: dss_types.h:47
opal_dss_print_fn_t odti_print_fn
print function
Definition: dss_internal.h:185
Data packing subsystem.
bool opal_dss_initialized
globals
Definition: dss_open_close.c:31
char * odti_name
Debugging string name.
Definition: dss_internal.h:173
#define OBJ_CLASS_DECLARATION(NAME)
Declaration for class descriptor.
Definition: opal_object.h:236
Internal struct used for holding registered dss functions.
Definition: dss_internal.h:168
int(* opal_dss_pack_fn_t)(opal_buffer_t *buffer, const void *src, int32_t num_values, opal_data_type_t type)
Top-level itnerface function to pack one or more values into a buffer.
Definition: dss.h:107