24134c4e91
Rather than rolling custom concatenate-strings macros for the QEMU_BUILD_BUG_ON macro to use, use the glue() macro we already have (since it's now available to us in this header). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
/* public domain */
|
|
|
|
#ifndef COMPILER_H
|
|
#define COMPILER_H
|
|
|
|
#include "config-host.h"
|
|
|
|
/*----------------------------------------------------------------------------
|
|
| The macro QEMU_GNUC_PREREQ tests for minimum version of the GNU C compiler.
|
|
| The code is a copy of SOFTFLOAT_GNUC_PREREQ, see softfloat-macros.h.
|
|
*----------------------------------------------------------------------------*/
|
|
#if defined(__GNUC__) && defined(__GNUC_MINOR__)
|
|
# define QEMU_GNUC_PREREQ(maj, min) \
|
|
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
|
|
#else
|
|
# define QEMU_GNUC_PREREQ(maj, min) 0
|
|
#endif
|
|
|
|
#define QEMU_NORETURN __attribute__ ((__noreturn__))
|
|
|
|
#if QEMU_GNUC_PREREQ(3, 4)
|
|
#define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
|
|
#else
|
|
#define QEMU_WARN_UNUSED_RESULT
|
|
#endif
|
|
|
|
#if QEMU_GNUC_PREREQ(4, 0)
|
|
#define QEMU_SENTINEL __attribute__((sentinel))
|
|
#else
|
|
#define QEMU_SENTINEL
|
|
#endif
|
|
|
|
#if QEMU_GNUC_PREREQ(4, 3)
|
|
#define QEMU_ARTIFICIAL __attribute__((always_inline, artificial))
|
|
#else
|
|
#define QEMU_ARTIFICIAL
|
|
#endif
|
|
|
|
#if defined(_WIN32)
|
|
# define QEMU_PACKED __attribute__((gcc_struct, packed))
|
|
#else
|
|
# define QEMU_PACKED __attribute__((packed))
|
|
#endif
|
|
|
|
#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
|
|
|
|
#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 always_inline
|
|
#if !((__GNUC__ < 3) || defined(__APPLE__))
|
|
#ifdef __OPTIMIZE__
|
|
#undef inline
|
|
#define inline __attribute__ (( always_inline )) __inline__
|
|
#endif
|
|
#endif
|
|
#else
|
|
#undef inline
|
|
#define inline always_inline
|
|
#endif
|
|
|
|
#define QEMU_BUILD_BUG_ON(x) \
|
|
typedef char glue(qemu_build_bug_on__,__LINE__)[(x)?-1:1] __attribute__((unused));
|
|
|
|
#if defined __GNUC__
|
|
# if !QEMU_GNUC_PREREQ(4, 4)
|
|
/* gcc versions before 4.4.x don't support gnu_printf, so use printf. */
|
|
# define GCC_FMT_ATTR(n, m) __attribute__((format(printf, n, m)))
|
|
# else
|
|
/* Use gnu_printf when supported (qemu uses standard format strings). */
|
|
# define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))
|
|
# if defined(_WIN32)
|
|
/* Map __printf__ to __gnu_printf__ because we want standard format strings
|
|
* even when MinGW or GLib include files use __printf__. */
|
|
# define __printf__ __gnu_printf__
|
|
# endif
|
|
# endif
|
|
#else
|
|
#define GCC_FMT_ATTR(n, m)
|
|
#endif
|
|
|
|
#endif /* COMPILER_H */
|