e78815a554
vl.c has a Sun-specific hack to supply a prototype for madvise(), but the call site has apparently moved to arch_init.c. Haiku doesn't implement madvise() in favor of posix_madvise(). OpenBSD and Solaris 10 don't implement posix_madvise() but madvise(). MinGW implements neither. Check for madvise() and posix_madvise() in configure and supply qemu_madvise() as wrapper. Prefer madvise() over posix_madvise() due to flag availability. Convert all callers to use qemu_madvise() and QEMU_MADV_*. Note that on Solaris the warning is fixed by moving the madvise() prototype, not by qemu_madvise() itself. It helps with porting though, and it simplifies most call sites. v7 -> v8: * Some versions of MinGW have no sys/mman.h header. Reported by Blue Swirl. v6 -> v7: * Adopt madvise() rather than posix_madvise() semantics for returning errors. * Use EINVAL in place of ENOTSUP. v5 -> v6: * Replace two leftover instances of POSIX_MADV_NORMAL with QEMU_MADV_INVALID. Spotted by Blue Swirl. v4 -> v5: * Introduce QEMU_MADV_INVALID, suggested by Alexander Graf. Note that this relies on -1 not being a valid advice value. v3 -> v4: * Eliminate #ifdefs at qemu_advise() call sites. Requested by Blue Swirl. This will currently break the check in kvm-all.c by calling madvise() with a supported flag, which will not fail. Ideas/patches welcome. v2 -> v3: * Reuse the *_MADV_* defines for QEMU_MADV_*. Suggested by Alexander Graf. * Add configure check for madvise(), too. Add defines to Makefile, not QEMU_CFLAGS. Convert all callers, untested. Suggested by Blue Swirl. * Keep Solaris' madvise() prototype around. Pointed out by Alexander Graf. * Display configure check results. v1 -> v2: * Don't rely on posix_madvise() availability, add qemu_madvise(). Suggested by Blue Swirl. Signed-off-by: Andreas Färber <afaerber@opensolaris.org> Cc: Blue Swirl <blauwirbel@gmail.com> Cc: Alexander Graf <agraf@suse.de> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
146 lines
3.3 KiB
C
146 lines
3.3 KiB
C
#ifndef QEMU_OSDEP_H
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#define QEMU_OSDEP_H
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#include <stdarg.h>
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#include <stddef.h>
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#ifdef __OpenBSD__
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#include <sys/types.h>
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#include <sys/signal.h>
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#endif
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#ifndef _WIN32
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#include <sys/time.h>
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#endif
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#ifndef glue
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#define xglue(x, y) x ## y
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#define glue(x, y) xglue(x, y)
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#define stringify(s) tostring(s)
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#define tostring(s) #s
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#endif
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#ifndef likely
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#if __GNUC__ < 3
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#define __builtin_expect(x, n) (x)
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#endif
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#define likely(x) __builtin_expect(!!(x), 1)
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#endif
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#ifdef CONFIG_NEED_OFFSETOF
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#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
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#endif
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#ifndef container_of
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#define container_of(ptr, type, member) ({ \
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const typeof(((type *) 0)->member) *__mptr = (ptr); \
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(type *) ((char *) __mptr - offsetof(type, member));})
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#endif
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/* Convert from a base type to a parent type, with compile time checking. */
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#ifdef __GNUC__
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#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
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char __attribute__((unused)) offset_must_be_zero[ \
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-offsetof(type, field)]; \
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container_of(dev, type, field);}))
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#else
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#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
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#endif
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#define typeof_field(type, field) typeof(((type *)0)->field)
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#define type_check(t1,t2) ((t1*)0 - (t2*)0)
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#ifndef MIN
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#define MIN(a, b) (((a) < (b)) ? (a) : (b))
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#endif
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#ifndef MAX
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#define MAX(a, b) (((a) > (b)) ? (a) : (b))
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#endif
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#ifndef ARRAY_SIZE
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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#endif
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#ifndef always_inline
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#if !((__GNUC__ < 3) || defined(__APPLE__))
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#ifdef __OPTIMIZE__
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#define inline __attribute__ (( always_inline )) __inline__
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#endif
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#endif
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#else
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#define inline always_inline
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#endif
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#ifdef __i386__
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#define REGPARM __attribute((regparm(3)))
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#else
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#define REGPARM
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#endif
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#define qemu_printf printf
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#if defined (__GNUC__) && defined (__GNUC_MINOR__)
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# define QEMU_GNUC_PREREQ(maj, min) \
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((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
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#else
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# define QEMU_GNUC_PREREQ(maj, min) 0
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#endif
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void *qemu_memalign(size_t alignment, size_t size);
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void *qemu_vmalloc(size_t size);
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void qemu_vfree(void *ptr);
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#define QEMU_MADV_INVALID -1
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#if defined(CONFIG_MADVISE)
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#define QEMU_MADV_WILLNEED MADV_WILLNEED
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#define QEMU_MADV_DONTNEED MADV_DONTNEED
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#ifdef MADV_DONTFORK
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#define QEMU_MADV_DONTFORK MADV_DONTFORK
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#else
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#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
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#endif
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#ifdef MADV_MERGEABLE
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#define QEMU_MADV_MERGEABLE MADV_MERGEABLE
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#else
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#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
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#endif
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#elif defined(CONFIG_POSIX_MADVISE)
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#define QEMU_MADV_WILLNEED POSIX_MADV_WILLNEED
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#define QEMU_MADV_DONTNEED POSIX_MADV_DONTNEED
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#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
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#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
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#else /* no-op */
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#define QEMU_MADV_WILLNEED QEMU_MADV_INVALID
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#define QEMU_MADV_DONTNEED QEMU_MADV_INVALID
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#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
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#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
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#endif
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int qemu_madvise(void *addr, size_t len, int advice);
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int qemu_create_pidfile(const char *filename);
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#ifdef _WIN32
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int ffs(int i);
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int setenv(const char *name, const char *value, int overwrite);
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typedef struct {
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long tv_sec;
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long tv_usec;
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} qemu_timeval;
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int qemu_gettimeofday(qemu_timeval *tp);
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#else
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typedef struct timeval qemu_timeval;
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#define qemu_gettimeofday(tp) gettimeofday(tp, NULL);
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#endif /* !_WIN32 */
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#endif
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