OpenMPI 0.1.1

- Main Page
- Related Pages
- Modules
- Data Structures
- Files

- File List
- Globals

empty.h
1 /*
2 * Copyright (c) 2009 Cisco Systems, Inc. All rights reserved.
3 * $COPYRIGHT$
4 *
5 * Additional copyrights may follow
6 *
7 * $HEADER$
8 */
9
10 #ifndef OPAL_MCA_MEMCPY_BASE_MEMORY_BASE_DEFAULT_H
11 #define OPAL_MCA_MEMCPY_BASE_MEMORY_BASE_DEFAULT_H
12
13 #include "opal_config.h"
14
15 /**
16 * Provided for memory components that don't provide an asynchronous
17 * method for determining if memory mappings have changed. If a
18 * component only has a synchronous / interactive method of checking,
19 * then it can override this macro with some logic to do a (hopefully)
20 * cheap check to see if memory mappings have changed. The intent is
21 * that if this cheap check returns true, the upper layer will then
22 * invoke the memoryc_process() function to actually process what
23 * changed. This function will be invoked by the upper layer with the
24 * syntax:
25 *
26 * if (opal_memory_changed()) { ... }
27 *
28 * Hence, if you need any kind of sophisticated logic, you might want
29 * to put it in an inline function and have the #define call the
30 * inline function.
31 */
32 #define opal_memory_changed() 0
33
34 BEGIN_C_DECLS
35
36 /**
37 * Default (empty) implementation of the memoryc_register function.
38 *
39 * See opal/mca/memory/memory.h for a description of the parameters.
40 */
41 OPAL_DECLSPEC int opal_memory_base_component_register_empty(void *start,
42 size_t len,
43 uint64_t cookie);
44
45 /**
46 * Default (empty) implementation of the memoryc_deregister function
47 *
48 * See opal/mca/memory/memory.h for a description of the parameters.
49 */
50 OPAL_DECLSPEC int opal_memory_base_component_deregister_empty(void *start,
51 size_t len,
52 uint64_t cookie);
53
54 END_C_DECLS
55
56 #endif