[mirror_qemu.git] / osdep.h

#ifndef QEMU_OSDEP_H
#define QEMU_OSDEP_H

#include <stdarg.h>
#include <stddef.h>
#ifdef __OpenBSD__
#include <sys/types.h>
#include <sys/signal.h>
#endif

#include <sys/time.h>

#ifndef glue
#define xglue(x, y) x ## y
#define glue(x, y) xglue(x, y)
#define stringify(s)	tostring(s)
#define tostring(s)	#s
#endif

#ifndef likely
#if __GNUC__ < 3
#define __builtin_expect(x, n) (x)
#endif

#define likely(x)   __builtin_expect(!!(x), 1)
#define unlikely(x)   __builtin_expect(!!(x), 0)
#endif

#ifdef CONFIG_NEED_OFFSETOF
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
#endif
#ifndef container_of
#define container_of(ptr, type, member) ({                      \
        const typeof(((type *) 0)->member) *__mptr = (ptr);     \
        (type *) ((char *) __mptr - offsetof(type, member));})
#endif

/* Convert from a base type to a parent type, with compile time checking.  */
#ifdef __GNUC__
#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
    char __attribute__((unused)) offset_must_be_zero[ \
        -offsetof(type, field)]; \
    container_of(dev, type, field);}))
#else
#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
#endif

#define typeof_field(type, field) typeof(((type *)0)->field)
#define type_check(t1,t2) ((t1*)0 - (t2*)0)

#ifndef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
#endif

#ifndef DIV_ROUND_UP
#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
#endif

#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#endif

#ifndef always_inline
#if !((__GNUC__ < 3) || defined(__APPLE__))
#ifdef __OPTIMIZE__
#define inline __attribute__ (( always_inline )) __inline__
#endif
#endif
#else
#define inline always_inline
#endif

#ifdef __i386__
#define REGPARM __attribute((regparm(3)))
#else
#define REGPARM
#endif

#define qemu_printf printf

int qemu_daemon(int nochdir, int noclose);
void *qemu_memalign(size_t alignment, size_t size);
void *qemu_vmalloc(size_t size);
void qemu_vfree(void *ptr);

#define QEMU_MADV_INVALID -1

#if defined(CONFIG_MADVISE)

#define QEMU_MADV_WILLNEED  MADV_WILLNEED
#define QEMU_MADV_DONTNEED  MADV_DONTNEED
#ifdef MADV_DONTFORK
#define QEMU_MADV_DONTFORK  MADV_DONTFORK
#else
#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
#endif
#ifdef MADV_MERGEABLE
#define QEMU_MADV_MERGEABLE MADV_MERGEABLE
#else
#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
#endif

#elif defined(CONFIG_POSIX_MADVISE)

#define QEMU_MADV_WILLNEED  POSIX_MADV_WILLNEED
#define QEMU_MADV_DONTNEED  POSIX_MADV_DONTNEED
#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID

#else /* no-op */

#define QEMU_MADV_WILLNEED  QEMU_MADV_INVALID
#define QEMU_MADV_DONTNEED  QEMU_MADV_INVALID
#define QEMU_MADV_DONTFORK  QEMU_MADV_INVALID
#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID

#endif

int qemu_madvise(void *addr, size_t len, int advice);

#if defined(__HAIKU__) && defined(__i386__)
#define FMT_pid "%ld"
#elif defined(WIN64)
#define FMT_pid "%" PRId64
#else
#define FMT_pid "%d"
#endif

int qemu_create_pidfile(const char *filename);
int qemu_get_thread_id(void);

#ifdef _WIN32
static inline void qemu_timersub(const struct timeval *val1,
                                 const struct timeval *val2,
                                 struct timeval *res)
{
    res->tv_sec = val1->tv_sec - val2->tv_sec;
    if (val1->tv_usec < val2->tv_usec) {
        res->tv_sec--;
        res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
    } else {
        res->tv_usec = val1->tv_usec - val2->tv_usec;
    }
}
#else
#define qemu_timersub timersub
#endif

#endif
Commit	Line	Data
	1	#ifndef QEMU_OSDEP_H
	2	#define QEMU_OSDEP_H
	3
	4	#include <stdarg.h>
	5	#include <stddef.h>
	6	#ifdef __OpenBSD__
	7	#include <sys/types.h>
	8	#include <sys/signal.h>
	9	#endif
	10
	11	#include <sys/time.h>
	12
	13	#ifndef glue
	14	#define xglue(x, y) x ## y
	15	#define glue(x, y) xglue(x, y)
	16	#define stringify(s) tostring(s)
	17	#define tostring(s) #s
	18	#endif
	19
	20	#ifndef likely
	21	#if __GNUC__ < 3
	22	#define __builtin_expect(x, n) (x)
	23	#endif
	24
	25	#define likely(x) __builtin_expect(!!(x), 1)
	26	#define unlikely(x) __builtin_expect(!!(x), 0)
	27	#endif
	28
	29	#ifdef CONFIG_NEED_OFFSETOF
	30	#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
	31	#endif
	32	#ifndef container_of
	33	#define container_of(ptr, type, member) ({ \
	34	const typeof(((type ) 0)->member) __mptr = (ptr); \
	35	(type ) ((char ) __mptr - offsetof(type, member));})
	36	#endif
	37
	38	/* Convert from a base type to a parent type, with compile time checking. */
	39	#ifdef __GNUC__
	40	#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
	41	char __attribute__((unused)) offset_must_be_zero[ \
	42	-offsetof(type, field)]; \
	43	container_of(dev, type, field);}))
	44	#else
	45	#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
	46	#endif
	47
	48	#define typeof_field(type, field) typeof(((type *)0)->field)
	49	#define type_check(t1,t2) ((t1)0 - (t2)0)
	50
	51	#ifndef MIN
	52	#define MIN(a, b) (((a) < (b)) ? (a) : (b))
	53	#endif
	54	#ifndef MAX
	55	#define MAX(a, b) (((a) > (b)) ? (a) : (b))
	56	#endif
	57
	58	#ifndef DIV_ROUND_UP
	59	#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
	60	#endif
	61
	62	#ifndef ARRAY_SIZE
	63	#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
	64	#endif
	65
	66	#ifndef always_inline
	67	#if !((__GNUC__ < 3) \|\| defined(__APPLE__))
	68	#ifdef __OPTIMIZE__
	69	#define inline __attribute__ (( always_inline )) __inline__
	70	#endif
	71	#endif
	72	#else
	73	#define inline always_inline
	74	#endif
	75
	76	#ifdef __i386__
	77	#define REGPARM __attribute((regparm(3)))
	78	#else
	79	#define REGPARM
	80	#endif
	81
	82	#define qemu_printf printf
	83
	84	int qemu_daemon(int nochdir, int noclose);
	85	void *qemu_memalign(size_t alignment, size_t size);
	86	void *qemu_vmalloc(size_t size);
	87	void qemu_vfree(void *ptr);
	88
	89	#define QEMU_MADV_INVALID -1
	90
	91	#if defined(CONFIG_MADVISE)
	92
	93	#define QEMU_MADV_WILLNEED MADV_WILLNEED
	94	#define QEMU_MADV_DONTNEED MADV_DONTNEED
	95	#ifdef MADV_DONTFORK
	96	#define QEMU_MADV_DONTFORK MADV_DONTFORK
	97	#else
	98	#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
	99	#endif
	100	#ifdef MADV_MERGEABLE
	101	#define QEMU_MADV_MERGEABLE MADV_MERGEABLE
	102	#else
	103	#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
	104	#endif
	105
	106	#elif defined(CONFIG_POSIX_MADVISE)
	107
	108	#define QEMU_MADV_WILLNEED POSIX_MADV_WILLNEED
	109	#define QEMU_MADV_DONTNEED POSIX_MADV_DONTNEED
	110	#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
	111	#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
	112
	113	#else /* no-op */
	114
	115	#define QEMU_MADV_WILLNEED QEMU_MADV_INVALID
	116	#define QEMU_MADV_DONTNEED QEMU_MADV_INVALID
	117	#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
	118	#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
	119
	120	#endif
	121
	122	int qemu_madvise(void *addr, size_t len, int advice);
	123
	124	#if defined(__HAIKU__) && defined(__i386__)
	125	#define FMT_pid "%ld"
	126	#elif defined(WIN64)
	127	#define FMT_pid "%" PRId64
	128	#else
	129	#define FMT_pid "%d"
	130	#endif
	131
	132	int qemu_create_pidfile(const char *filename);
	133	int qemu_get_thread_id(void);
	134
	135	#ifdef _WIN32
	136	static inline void qemu_timersub(const struct timeval *val1,
	137	const struct timeval *val2,
	138	struct timeval *res)
	139	{
	140	res->tv_sec = val1->tv_sec - val2->tv_sec;
	141	if (val1->tv_usec < val2->tv_usec) {
	142	res->tv_sec--;
	143	res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
	144	} else {
	145	res->tv_usec = val1->tv_usec - val2->tv_usec;
	146	}
	147	}
	148	#else
	149	#define qemu_timersub timersub
	150	#endif
	151
	152	#endif