[fio.git] / os / os.h

#ifndef FIO_OS_H
#define FIO_OS_H

#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <pthread.h>
#include <unistd.h>
#include <stdlib.h>

#include "../arch/arch.h" /* IWYU pragma: export */
#include "../lib/types.h"

enum {
	os_linux = 1,
	os_aix,
	os_freebsd,
	os_hpux,
	os_mac,
	os_netbsd,
	os_openbsd,
	os_solaris,
	os_windows,
	os_android,
	os_dragonfly,

	os_nr,
};

/* IWYU pragma: begin_exports */
#if defined(__ANDROID__)
#include "os-android.h"
#elif defined(__linux__)
#include "os-linux.h"
#elif defined(__FreeBSD__)
#include "os-freebsd.h"
#elif defined(__OpenBSD__)
#include "os-openbsd.h"
#elif defined(__NetBSD__)
#include "os-netbsd.h"
#elif defined(__sun__)
#include "os-solaris.h"
#elif defined(__APPLE__)
#include "os-mac.h"
#elif defined(_AIX)
#include "os-aix.h"
#elif defined(__hpux)
#include "os-hpux.h"
#elif defined(WIN32)
#include "os-windows.h"
#elif defined (__DragonFly__)
#include "os-dragonfly.h"
#else
#error "unsupported os"
#endif

#ifdef CONFIG_POSIXAIO
#include <aio.h>
#ifndef FIO_OS_HAVE_AIOCB_TYPEDEF
typedef struct aiocb os_aiocb_t;
#endif
#endif

#ifndef CONFIG_STRSEP
#include "../oslib/strsep.h"
#endif

#ifndef CONFIG_STRLCAT
#include "../oslib/strlcat.h"
#endif
/* IWYU pragma: end_exports */

#ifdef MSG_DONTWAIT
#define OS_MSG_DONTWAIT	MSG_DONTWAIT
#endif

#ifndef POSIX_FADV_DONTNEED
#define POSIX_FADV_DONTNEED	(0)
#define POSIX_FADV_SEQUENTIAL	(0)
#define POSIX_FADV_RANDOM	(0)
#define POSIX_FADV_NORMAL	(0)
#endif

#ifndef FIO_HAVE_CPU_AFFINITY
#define fio_cpu_clear(mask, cpu)	do { } while (0)
typedef unsigned long os_cpu_mask_t;

static inline int fio_setaffinity(int pid, os_cpu_mask_t cpumask)
{
	return 0;
}

static inline int fio_getaffinity(int pid, os_cpu_mask_t *cpumask)
{
	return -1;
}

static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
{
	return -1;
}

static inline int fio_cpus_split(os_cpu_mask_t *mask, unsigned int cpu_index)
{
	return 0;
}
#else
extern int fio_cpus_split(os_cpu_mask_t *mask, unsigned int cpu);
#endif

#ifndef FIO_HAVE_IOPRIO
#define ioprio_set(which, who, prioclass, prio)	(0)
#endif

#ifndef FIO_HAVE_ODIRECT
#define OS_O_DIRECT			0
#else
#define OS_O_DIRECT			O_DIRECT
#endif

#ifdef OS_O_ATOMIC
#define FIO_O_ATOMIC			OS_O_ATOMIC
#else
#define FIO_O_ATOMIC			0
#endif

#ifndef FIO_HAVE_HUGETLB
#define SHM_HUGETLB			0
#define MAP_HUGETLB			0
#ifndef FIO_HUGE_PAGE
#define FIO_HUGE_PAGE			0
#endif
#else
#ifndef FIO_HUGE_PAGE
#define FIO_HUGE_PAGE			4194304
#endif
#endif

#ifndef FIO_HAVE_MMAP_HUGE
#define MAP_HUGETLB			0
#endif

#ifndef FIO_O_NOATIME
#define FIO_O_NOATIME			0
#endif

#ifndef OS_RAND_MAX
#define OS_RAND_MAX			RAND_MAX
#endif

#ifndef FIO_HAVE_RAWBIND
#define fio_lookup_raw(dev, majdev, mindev)	1
#endif

#ifndef FIO_PREFERRED_ENGINE
#define FIO_PREFERRED_ENGINE	"psync"
#endif

#ifndef FIO_OS_PATH_SEPARATOR
#define FIO_OS_PATH_SEPARATOR	'/'
#endif

#ifndef FIO_PREFERRED_CLOCK_SOURCE
#ifdef CONFIG_CLOCK_GETTIME
#define FIO_PREFERRED_CLOCK_SOURCE	CS_CGETTIME
#else
#define FIO_PREFERRED_CLOCK_SOURCE	CS_GTOD
#endif
#endif

#ifndef FIO_MAX_JOBS
#define FIO_MAX_JOBS		4096
#endif

#ifndef CONFIG_SOCKLEN_T
typedef unsigned int socklen_t;
#endif

#ifndef FIO_OS_HAS_CTIME_R
#define os_ctime_r(x, y, z)     (void) ctime_r((x), (y))
#endif

#ifdef FIO_USE_GENERIC_SWAP
static inline uint16_t fio_swap16(uint16_t val)
{
	return (val << 8) | (val >> 8);
}

static inline uint32_t fio_swap32(uint32_t val)
{
	val = ((val & 0xff00ff00UL) >> 8) | ((val & 0x00ff00ffUL) << 8);

	return (val >> 16) | (val << 16);
}

static inline uint64_t fio_swap64(uint64_t val)
{
	val = ((val & 0xff00ff00ff00ff00ULL) >> 8) |
	      ((val & 0x00ff00ff00ff00ffULL) << 8);
	val = ((val & 0xffff0000ffff0000ULL) >> 16) |
	      ((val & 0x0000ffff0000ffffULL) << 16);

	return (val >> 32) | (val << 32);
}
#endif

#ifndef FIO_HAVE_BYTEORDER_FUNCS
#ifdef CONFIG_LITTLE_ENDIAN
#define __be64_to_cpu(x)		fio_swap64(x)
#define __le16_to_cpu(x)		(x)
#define __le32_to_cpu(x)		(x)
#define __le64_to_cpu(x)		(x)
#define __cpu_to_be64(x)		fio_swap64(x)
#define __cpu_to_le16(x)		(x)
#define __cpu_to_le32(x)		(x)
#define __cpu_to_le64(x)		(x)
#else
#define __be64_to_cpu(x)		(x)
#define __le16_to_cpu(x)		fio_swap16(x)
#define __le32_to_cpu(x)		fio_swap32(x)
#define __le64_to_cpu(x)		fio_swap64(x)
#define __cpu_to_be64(x)		(x)
#define __cpu_to_le16(x)		fio_swap16(x)
#define __cpu_to_le32(x)		fio_swap32(x)
#define __cpu_to_le64(x)		fio_swap64(x)
#endif
#endif /* FIO_HAVE_BYTEORDER_FUNCS */

#ifdef FIO_INTERNAL
#define be64_to_cpu(val) ({			\
	typecheck(uint64_t, val);		\
	__be64_to_cpu(val);			\
})
#define le16_to_cpu(val) ({			\
	typecheck(uint16_t, val);		\
	__le16_to_cpu(val);			\
})
#define le32_to_cpu(val) ({			\
	typecheck(uint32_t, val);		\
	__le32_to_cpu(val);			\
})
#define le64_to_cpu(val) ({			\
	typecheck(uint64_t, val);		\
	__le64_to_cpu(val);			\
})
#endif

#define cpu_to_be64(val) ({			\
	typecheck(uint64_t, val);		\
	__cpu_to_be64(val);			\
})
#define cpu_to_le16(val) ({			\
	typecheck(uint16_t, val);		\
	__cpu_to_le16(val);			\
})
#define cpu_to_le32(val) ({			\
	typecheck(uint32_t, val);		\
	__cpu_to_le32(val);			\
})
#define cpu_to_le64(val) ({			\
	typecheck(uint64_t, val);		\
	__cpu_to_le64(val);			\
})

#define FIO_DEF_CL_SIZE		128

static inline int os_cache_line_size(void)
{
#ifdef FIO_HAVE_CL_SIZE
	int ret = arch_cache_line_size();

	if (ret <= 0)
		return FIO_DEF_CL_SIZE;

	return ret;
#else
	return FIO_DEF_CL_SIZE;
#endif
}

#ifdef FIO_USE_GENERIC_BDEV_SIZE
static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
{
	off_t end;

	*bytes = 0;

	end = lseek(f->fd, 0, SEEK_END);
	if (end < 0)
		return errno;

	*bytes = end;
	return 0;
}
#endif

#ifdef FIO_USE_GENERIC_RAND
typedef unsigned int os_random_state_t;

static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
{
	srand(seed);
}

static inline long os_random_long(os_random_state_t *rs)
{
	long val;

	val = rand_r(rs);
	return val;
}
#endif

#ifdef FIO_USE_GENERIC_INIT_RANDOM_STATE
static inline int init_random_seeds(unsigned long *rand_seeds, int size)
{
	int fd;

	fd = open("/dev/urandom", O_RDONLY);
	if (fd == -1) {
		return 1;
	}

	if (read(fd, rand_seeds, size) < size) {
		close(fd);
		return 1;
	}

	close(fd);
	return 0;
}
#endif

#ifndef FIO_HAVE_FS_STAT
static inline unsigned long long get_fs_free_size(const char *path)
{
	return 0;
}
#endif

#ifndef FIO_HAVE_CPU_ONLINE_SYSCONF
static inline unsigned int cpus_online(void)
{
	return sysconf(_SC_NPROCESSORS_ONLN);
}
#endif

#ifndef CPU_COUNT
#ifdef FIO_HAVE_CPU_AFFINITY
static inline int CPU_COUNT(os_cpu_mask_t *mask)
{
	int max_cpus = cpus_online();
	int nr_cpus, i;

	for (i = 0, nr_cpus = 0; i < max_cpus; i++)
		if (fio_cpu_isset(mask, i))
			nr_cpus++;

	return nr_cpus;
}
#endif
#endif

#ifndef FIO_HAVE_GETTID
static inline int gettid(void)
{
	return getpid();
}
#endif

#ifndef FIO_HAVE_SHM_ATTACH_REMOVED
static inline int shm_attach_to_open_removed(void)
{
	return 0;
}
#endif

#ifndef FIO_HAVE_NATIVE_FALLOCATE
static inline bool fio_fallocate(struct fio_file *f, uint64_t offset, uint64_t len)
{
	errno = ENOSYS;
	return false;
}
#endif

#if defined(CONFIG_POSIX_FALLOCATE) || defined(FIO_HAVE_NATIVE_FALLOCATE)
# define FIO_HAVE_ANY_FALLOCATE
#endif

#endif
Commit	Line	Data
ebac4655 JA	1	#ifndef FIO_OS_H
	2	#define FIO_OS_H
	3
a14ca44a	4	#include <sys/types.h>
203913ea	5	#include <sys/socket.h>
93bcfd20	6	#include <fcntl.h>
03e20d68	7	#include <pthread.h>
a14ca44a	8	#include <unistd.h>
ecc314ba	9	#include <stdlib.h>
a14ca44a	10
c473a9bd	11	#include "../arch/arch.h" /* IWYU pragma: export */
e39c0676	12	#include "../lib/types.h"
836fcc0f	13
cca84643 JA	14	enum {
	15	os_linux = 1,
	16	os_aix,
	17	os_freebsd,
	18	os_hpux,
	19	os_mac,
	20	os_netbsd,
3cd4c66f	21	os_openbsd,
cca84643 JA	22	os_solaris,
cca84643 JA	23	os_windows,
ec5c6b12	24	os_android,
239b2882	25	os_dragonfly,
cca84643 JA	26
	27	os_nr,
	28	};
	29
c473a9bd	30	/* IWYU pragma: begin_exports */
ec5c6b12 AC	31	#if defined(__ANDROID__)
	32	#include "os-android.h"
	33	#elif defined(__linux__)
ebac4655 JA	34	#include "os-linux.h"
	35	#elif defined(__FreeBSD__)
	36	#include "os-freebsd.h"
3cd4c66f J	37	#elif defined(__OpenBSD__)
3cd4c66f J	38	#include "os-openbsd.h"
7452440e YT	39	#elif defined(__NetBSD__)
7452440e YT	40	#include "os-netbsd.h"
2c0ecd28 JA	41	#elif defined(__sun__)
2c0ecd28 JA	42	#include "os-solaris.h"
2afd826b JA	43	#elif defined(__APPLE__)
2afd826b JA	44	#include "os-mac.h"
bf2e821a CC	45	#elif defined(_AIX)
bf2e821a CC	46	#include "os-aix.h"
c00a2289 JA	47	#elif defined(__hpux)
c00a2289 JA	48	#include "os-hpux.h"
93bcfd20	49	#elif defined(WIN32)
03e20d68	50	#include "os-windows.h"
239b2882 JA	51	#elif defined (__DragonFly__)
239b2882 JA	52	#include "os-dragonfly.h"
ebac4655 JA	53	#else
	54	#error "unsupported os"
	55	#endif
	56
67bf9823	57	#ifdef CONFIG_POSIXAIO
ebac4655	58	#include <aio.h>
e97c1442 JA	59	#ifndef FIO_OS_HAVE_AIOCB_TYPEDEF
	60	typedef struct aiocb os_aiocb_t;
	61	#endif
ebac4655 JA	62	#endif
ebac4655 JA	63
4feafb1e	64	#ifndef CONFIG_STRSEP
984f30c9	65	#include "../oslib/strsep.h"
5921e80c JA	66	#endif
5921e80c JA	67
5ad7be56	68	#ifndef CONFIG_STRLCAT
984f30c9	69	#include "../oslib/strlcat.h"
5ad7be56	70	#endif
c473a9bd	71	/* IWYU pragma: end_exports */
5ad7be56	72
8e239cae JA	73	#ifdef MSG_DONTWAIT
	74	#define OS_MSG_DONTWAIT MSG_DONTWAIT
	75	#endif
	76
4d8947de	77	#ifndef POSIX_FADV_DONTNEED
ebac4655 JA	78	#define POSIX_FADV_DONTNEED (0)
	79	#define POSIX_FADV_SEQUENTIAL (0)
	80	#define POSIX_FADV_RANDOM (0)
3ab9ebca	81	#define POSIX_FADV_NORMAL (0)
4d8947de	82	#endif
ebac4655 JA	83
ebac4655 JA	84	#ifndef FIO_HAVE_CPU_AFFINITY
be4ecfdf	85	#define fio_cpu_clear(mask, cpu) do { } while (0)
7452440e	86	typedef unsigned long os_cpu_mask_t;
3e55d40f TK	87
	88	static inline int fio_setaffinity(int pid, os_cpu_mask_t cpumask)
	89	{
	90	return 0;
	91	}
	92
2c6772e2 TK	93	static inline int fio_getaffinity(int pid, os_cpu_mask_t *cpumask)
	94	{
	95	return -1;
	96	}
	97
3e55d40f TK	98	static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
	99	{
	100	return -1;
	101	}
	102
	103	static inline int fio_cpus_split(os_cpu_mask_t *mask, unsigned int cpu_index)
	104	{
	105	return 0;
	106	}
c2acfbac JA	107	#else
c2acfbac JA	108	extern int fio_cpus_split(os_cpu_mask_t *mask, unsigned int cpu);
ebac4655 JA	109	#endif
	110
	111	#ifndef FIO_HAVE_IOPRIO
28727df7	112	#define ioprio_set(which, who, prioclass, prio) (0)
ebac4655 JA	113	#endif
ebac4655 JA	114
2c0ecd28	115	#ifndef FIO_HAVE_ODIRECT
7d424763 JA	116	#define OS_O_DIRECT 0
	117	#else
	118	#define OS_O_DIRECT O_DIRECT
2c0ecd28 JA	119	#endif
2c0ecd28 JA	120
d01612f3 CM	121	#ifdef OS_O_ATOMIC
	122	#define FIO_O_ATOMIC OS_O_ATOMIC
	123	#else
	124	#define FIO_O_ATOMIC 0
	125	#endif
	126
74b025b0 JA	127	#ifndef FIO_HAVE_HUGETLB
74b025b0 JA	128	#define SHM_HUGETLB 0
d6dc02fb	129	#define MAP_HUGETLB 0
4d8947de	130	#ifndef FIO_HUGE_PAGE
74b025b0	131	#define FIO_HUGE_PAGE 0
4d8947de	132	#endif
74b025b0	133	#else
cb25df61	134	#ifndef FIO_HUGE_PAGE
ee0e0a71	135	#define FIO_HUGE_PAGE 4194304
74b025b0	136	#endif
cb25df61	137	#endif
74b025b0	138
39b93568 JA	139	#ifndef FIO_HAVE_MMAP_HUGE
	140	#define MAP_HUGETLB 0
	141	#endif
	142
5921e80c JA	143	#ifndef FIO_O_NOATIME
	144	#define FIO_O_NOATIME 0
	145	#endif
	146
dc873b6f JA	147	#ifndef OS_RAND_MAX
	148	#define OS_RAND_MAX RAND_MAX
	149	#endif
	150
07e5b264	151	#ifndef FIO_HAVE_RAWBIND
8cc7afa9	152	#define fio_lookup_raw(dev, majdev, mindev) 1
07e5b264 JA	153	#endif
07e5b264 JA	154
58483fa4	155	#ifndef FIO_PREFERRED_ENGINE
df96a39e	156	#define FIO_PREFERRED_ENGINE "psync"
58483fa4 JA	157	#endif
58483fa4 JA	158
b9fd788f	159	#ifndef FIO_OS_PATH_SEPARATOR
53a7af85	160	#define FIO_OS_PATH_SEPARATOR '/'
b9fd788f BC	161	#endif
b9fd788f BC	162
16de1bf9	163	#ifndef FIO_PREFERRED_CLOCK_SOURCE
86e53416	164	#ifdef CONFIG_CLOCK_GETTIME
16de1bf9	165	#define FIO_PREFERRED_CLOCK_SOURCE CS_CGETTIME
86e53416 BC	166	#else
	167	#define FIO_PREFERRED_CLOCK_SOURCE CS_GTOD
	168	#endif
16de1bf9 BC	169	#endif
16de1bf9 BC	170
fca70358	171	#ifndef FIO_MAX_JOBS
cab2472e	172	#define FIO_MAX_JOBS 4096
fca70358 JA	173	#endif
fca70358 JA	174
67bf9823 JA	175	#ifndef CONFIG_SOCKLEN_T
67bf9823 JA	176	typedef unsigned int socklen_t;
5ba13ea6 JA	177	#endif
5ba13ea6 JA	178
45054cbe	179	#ifndef FIO_OS_HAS_CTIME_R
1f81991e	180	#define os_ctime_r(x, y, z) (void) ctime_r((x), (y))
45054cbe SD	181	#endif
45054cbe SD	182
901ebe18	183	#ifdef FIO_USE_GENERIC_SWAP
9677bec3	184	static inline uint16_t fio_swap16(uint16_t val)
232f9b73 JA	185	{
	186	return (val << 8) \| (val >> 8);
	187	}
	188
901ebe18	189	static inline uint32_t fio_swap32(uint32_t val)
232f9b73 JA	190	{
	191	val = ((val & 0xff00ff00UL) >> 8) \| ((val & 0x00ff00ffUL) << 8);
	192
	193	return (val >> 16) \| (val << 16);
	194	}
	195
901ebe18	196	static inline uint64_t fio_swap64(uint64_t val)
232f9b73 JA	197	{
	198	val = ((val & 0xff00ff00ff00ff00ULL) >> 8) \|
	199	((val & 0x00ff00ff00ff00ffULL) << 8);
	200	val = ((val & 0xffff0000ffff0000ULL) >> 16) \|
	201	((val & 0x0000ffff0000ffffULL) << 16);
	202
	203	return (val >> 32) \| (val << 32);
	204	}
	205	#endif
	206
ec5c6b12	207	#ifndef FIO_HAVE_BYTEORDER_FUNCS
0dcebdf4	208	#ifdef CONFIG_LITTLE_ENDIAN
b747af64	209	#define __be64_to_cpu(x) fio_swap64(x)
8111092f JA	210	#define __le16_to_cpu(x) (x)
	211	#define __le32_to_cpu(x) (x)
	212	#define __le64_to_cpu(x) (x)
b747af64	213	#define __cpu_to_be64(x) fio_swap64(x)
8111092f JA	214	#define __cpu_to_le16(x) (x)
	215	#define __cpu_to_le32(x) (x)
	216	#define __cpu_to_le64(x) (x)
	217	#else
b747af64	218	#define __be64_to_cpu(x) (x)
8111092f JA	219	#define __le16_to_cpu(x) fio_swap16(x)
	220	#define __le32_to_cpu(x) fio_swap32(x)
	221	#define __le64_to_cpu(x) fio_swap64(x)
b747af64	222	#define __cpu_to_be64(x) (x)
8111092f JA	223	#define __cpu_to_le16(x) fio_swap16(x)
	224	#define __cpu_to_le32(x) fio_swap32(x)
	225	#define __cpu_to_le64(x) fio_swap64(x)
	226	#endif
ec5c6b12	227	#endif /* FIO_HAVE_BYTEORDER_FUNCS */
8111092f	228
0bbe46e7	229	#ifdef FIO_INTERNAL
b747af64 SW	230	#define be64_to_cpu(val) ({ \
	231	typecheck(uint64_t, val); \
	232	__be64_to_cpu(val); \
	233	})
8111092f	234	#define le16_to_cpu(val) ({ \
ff8039b7	235	typecheck(uint16_t, val); \
c46fda90	236	__le16_to_cpu(val); \
8111092f JA	237	})
8111092f JA	238	#define le32_to_cpu(val) ({ \
ff8039b7	239	typecheck(uint32_t, val); \
c46fda90	240	__le32_to_cpu(val); \
8111092f JA	241	})
8111092f JA	242	#define le64_to_cpu(val) ({ \
ff8039b7 JA	243	typecheck(uint64_t, val); \
ff8039b7 JA	244	__le64_to_cpu(val); \
8111092f	245	})
0bbe46e7 DG	246	#endif
0bbe46e7 DG	247
b747af64 SW	248	#define cpu_to_be64(val) ({ \
	249	typecheck(uint64_t, val); \
	250	__cpu_to_be64(val); \
	251	})
8111092f	252	#define cpu_to_le16(val) ({ \
ff8039b7	253	typecheck(uint16_t, val); \
c46fda90	254	__cpu_to_le16(val); \
8111092f JA	255	})
8111092f JA	256	#define cpu_to_le32(val) ({ \
ff8039b7	257	typecheck(uint32_t, val); \
c46fda90	258	__cpu_to_le32(val); \
8111092f JA	259	})
8111092f JA	260	#define cpu_to_le64(val) ({ \
ff8039b7	261	typecheck(uint64_t, val); \
c46fda90	262	__cpu_to_le64(val); \
8111092f JA	263	})
8111092f JA	264
eb7ccf38 JA	265	#define FIO_DEF_CL_SIZE 128
	266
	267	static inline int os_cache_line_size(void)
	268	{
	269	#ifdef FIO_HAVE_CL_SIZE
	270	int ret = arch_cache_line_size();
	271
	272	if (ret <= 0)
	273	return FIO_DEF_CL_SIZE;
	274
	275	return ret;
	276	#else
	277	return FIO_DEF_CL_SIZE;
	278	#endif
	279	}
	280
792d5517	281	#ifdef FIO_USE_GENERIC_BDEV_SIZE
ecc314ba	282	static inline int blockdev_size(struct fio_file f, unsigned long long bytes)
792d5517	283	{
3b2e1464	284	off_t end;
792d5517	285
3b2e1464 JA	286	*bytes = 0;
3b2e1464 JA	287
ecc314ba	288	end = lseek(f->fd, 0, SEEK_END);
792d5517 JA	289	if (end < 0)
	290	return errno;
	291
	292	*bytes = end;
	293	return 0;
	294	}
	295	#endif
	296
53531370 JA	297	#ifdef FIO_USE_GENERIC_RAND
	298	typedef unsigned int os_random_state_t;
	299
	300	static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
	301	{
	302	srand(seed);
	303	}
	304
	305	static inline long os_random_long(os_random_state_t *rs)
	306	{
	307	long val;
	308
	309	val = rand_r(rs);
	310	return val;
	311	}
	312	#endif
	313
93bcfd20	314	#ifdef FIO_USE_GENERIC_INIT_RANDOM_STATE
1ed84d86	315	static inline int init_random_seeds(unsigned long *rand_seeds, int size)
93bcfd20 BC	316	{
	317	int fd;
	318
	319	fd = open("/dev/urandom", O_RDONLY);
	320	if (fd == -1) {
	321	return 1;
	322	}
	323
	324	if (read(fd, rand_seeds, size) < size) {
	325	close(fd);
	326	return 1;
	327	}
	328
	329	close(fd);
93bcfd20 BC	330	return 0;
	331	}
	332	#endif
	333
2e3bd4c2	334	#ifndef FIO_HAVE_FS_STAT
c08ad04c	335	static inline unsigned long long get_fs_free_size(const char *path)
2e3bd4c2 JA	336	{
	337	return 0;
	338	}
	339	#endif
	340
c00a2289 JA	341	#ifndef FIO_HAVE_CPU_ONLINE_SYSCONF
	342	static inline unsigned int cpus_online(void)
	343	{
	344	return sysconf(_SC_NPROCESSORS_ONLN);
	345	}
	346	#endif
	347
7221da37	348	#ifndef CPU_COUNT
6cf71c24 JA	349	#ifdef FIO_HAVE_CPU_AFFINITY
	350	static inline int CPU_COUNT(os_cpu_mask_t *mask)
	351	{
	352	int max_cpus = cpus_online();
	353	int nr_cpus, i;
	354
	355	for (i = 0, nr_cpus = 0; i < max_cpus; i++)
	356	if (fio_cpu_isset(mask, i))
	357	nr_cpus++;
	358
	359	return nr_cpus;
	360	}
	361	#endif
	362	#endif
	363
47f767c1 JA	364	#ifndef FIO_HAVE_GETTID
	365	static inline int gettid(void)
	366	{
	367	return getpid();
	368	}
	369	#endif
	370
0cfe2089 TK	371	#ifndef FIO_HAVE_SHM_ATTACH_REMOVED
	372	static inline int shm_attach_to_open_removed(void)
	373	{
	374	return 0;
	375	}
	376	#endif
	377
2c3e17be SW	378	#ifndef FIO_HAVE_NATIVE_FALLOCATE
	379	static inline bool fio_fallocate(struct fio_file *f, uint64_t offset, uint64_t len)
	380	{
	381	errno = ENOSYS;
	382	return false;
	383	}
	384	#endif
	385
cbbdf1c8 SW	386	#if defined(CONFIG_POSIX_FALLOCATE) \|\| defined(FIO_HAVE_NATIVE_FALLOCATE)
	387	# define FIO_HAVE_ANY_FALLOCATE
	388	#endif
	389
ebac4655	390	#endif