nvml-sys 0.0.6

A low-level FFI wrapper around the Persistent Memory Development Kit, PMDK (formerly NVML) and its libraries, including libpmem, libpmemobj and others. Currently tracks master after version 1.3.1.
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

/*
 * Copyright 2015-2017, Intel Corporation
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *
 *     * Neither the name of the copyright holder nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * util_linux.c -- misc utilities with OS-specific implementation
 */

#include <string.h>
#include <util.h>
#include <limits.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <errno.h>
#include "os.h"
#include "out.h"

/* pass through for Linux */
void
util_strerror(int errnum, char *buff, size_t bufflen)
{
	strerror_r(errnum, buff, bufflen);
}

/*
 * util_part_realpath -- get canonicalized absolute pathname
 *
 * As paths used in a poolset file have to be absolute (checked when parsing
 * a poolset file), here we only have to resolve symlinks.
 */
char *
util_part_realpath(const char *path)
{
	return realpath(path, NULL);
}

/*
 * util_compare_file_inodes -- compare device and inodes of two files;
 *                             this resolves hard links
 */
int
util_compare_file_inodes(const char *path1, const char *path2)
{
	struct stat sb1, sb2;
	if (os_stat(path1, &sb1)) {
		if (errno != ENOENT) {
			ERR("!stat failed for %s", path1);
			return -1;
		}
		LOG(1, "stat failed for %s", path1);
		errno = 0;
		return strcmp(path1, path2) != 0;
	}

	if (os_stat(path2, &sb2)) {
		if (errno != ENOENT) {
			ERR("!stat failed for %s", path2);
			return -1;
		}
		LOG(1, "stat failed for %s", path2);
		errno = 0;
		return strcmp(path1, path2) != 0;
	}

	return sb1.st_dev != sb2.st_dev || sb1.st_ino != sb2.st_ino;
}

/*
 * util_aligned_malloc -- allocate aligned memory
 */
void *
util_aligned_malloc(size_t alignment, size_t size)
{
	void *retval = NULL;

	errno = posix_memalign(&retval, alignment, size);

	return retval;
}

/*
 * util_aligned_free -- free allocated memory in util_aligned_malloc
 */
void
util_aligned_free(void *ptr)
{
	free(ptr);
}

/*
 * util_getexecname -- return name of current executable
 */
char *
util_getexecname(char *path, size_t pathlen)
{
	ssize_t cc;

#ifdef __FreeBSD__
#include <sys/types.h>
#include <sys/sysctl.h>

	int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};

	cc = (sysctl(mib, 4, path, &pathlen, NULL, 0) == -1) ?
		-1 : (ssize_t)pathlen;
#else
	cc = readlink("/proc/self/exe", path, pathlen);
#endif
	if (cc == -1)
		strcpy(path, "unknown");
	else
		path[cc] = '\0';

	return path;
}