include/wine/port.h

/*
 * Wine porting definitions
 *
 * Copyright 1996 Alexandre Julliard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#ifndef __WINE_WINE_PORT_H
#define __WINE_WINE_PORT_H

#ifndef __WINE_CONFIG_H
# error You must include config.h to use this header
#endif

#ifdef __WINE_BASETSD_H
# error You must include port.h before all other headers
#endif

#ifndef _GNU_SOURCE
# define _GNU_SOURCE  /* for pread/pwrite, isfinite */
#endif
#include <fcntl.h>
#include <math.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_DIRECT_H
# include <direct.h>
#endif
#ifdef HAVE_IO_H
# include <io.h>
#endif
#ifdef HAVE_PROCESS_H
# include <process.h>
#endif
#include <string.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif


/****************************************************************
 * Type definitions
 */

#if !defined(_MSC_VER) && !defined(__int64)
#  if defined(__x86_64__) || defined(__aarch64__) || defined(_WIN64)
#    define __int64 long
#  else
#    define __int64 long long
#  endif
#endif

#ifndef HAVE_MODE_T
typedef int mode_t;
#endif
#ifndef HAVE_OFF_T
typedef long off_t;
#endif
#ifndef HAVE_PID_T
typedef int pid_t;
#endif
#ifndef HAVE_SIZE_T
typedef unsigned int size_t;
#endif
#ifndef HAVE_SSIZE_T
typedef int ssize_t;
#endif
#ifndef HAVE_FSBLKCNT_T
typedef unsigned long fsblkcnt_t;
#endif
#ifndef HAVE_FSFILCNT_T
typedef unsigned long fsfilcnt_t;
#endif

#ifndef HAVE_STRUCT_STATVFS_F_BLOCKS
struct statvfs
{
    unsigned long f_bsize;
    unsigned long f_frsize;
    fsblkcnt_t    f_blocks;
    fsblkcnt_t    f_bfree;
    fsblkcnt_t    f_bavail;
    fsfilcnt_t    f_files;
    fsfilcnt_t    f_ffree;
    fsfilcnt_t    f_favail;
    unsigned long f_fsid;
    unsigned long f_flag;
    unsigned long f_namemax;
};
#endif /* HAVE_STRUCT_STATVFS_F_BLOCKS */


/****************************************************************
 * Macro definitions
 */

#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#define RTLD_LAZY    0x001
#define RTLD_NOW     0x002
#define RTLD_GLOBAL  0x100
#endif

#ifdef HAVE_ONE_ARG_MKDIR
#define mkdir(path,mode) mkdir(path)
#endif

#if !defined(HAVE_FTRUNCATE) && defined(HAVE_CHSIZE)
#define ftruncate chsize
#endif

#if !defined(HAVE_POPEN) && defined(HAVE__POPEN)
#define popen _popen
#endif

#if !defined(HAVE_PCLOSE) && defined(HAVE__PCLOSE)
#define pclose _pclose
#endif

#if !defined(HAVE_STRDUP) && defined(HAVE__STRDUP)
#define strdup _strdup
#endif

#if !defined(HAVE_SNPRINTF) && defined(HAVE__SNPRINTF)
#define snprintf _snprintf
#endif

#if !defined(HAVE_VSNPRINTF) && defined(HAVE__VSNPRINTF)
#define vsnprintf _vsnprintf
#endif

#if !defined(HAVE_STRTOLL) && defined(HAVE__STRTOI64)
#define strtoll _strtoi64
#endif

#if !defined(HAVE_STRTOULL) && defined(HAVE__STRTOUI64)
#define strtoull _strtoui64
#endif

#ifndef S_ISLNK
# define S_ISLNK(mod) (0)
#endif

#ifndef S_ISSOCK
# define S_ISSOCK(mod) (0)
#endif

#ifndef S_ISDIR
# define S_ISDIR(mod) (((mod) & _S_IFMT) == _S_IFDIR)
#endif

#ifndef S_ISCHR
# define S_ISCHR(mod) (((mod) & _S_IFMT) == _S_IFCHR)
#endif

#ifndef S_ISFIFO
# define S_ISFIFO(mod) (((mod) & _S_IFMT) == _S_IFIFO)
#endif

#ifndef S_ISREG
# define S_ISREG(mod) (((mod) & _S_IFMT) == _S_IFREG)
#endif

/* So we open files in 64 bit access mode on Linux */
#ifndef O_LARGEFILE
# define O_LARGEFILE 0
#endif

#ifndef O_NONBLOCK
# define O_NONBLOCK 0
#endif

#ifndef O_BINARY
# define O_BINARY 0
#endif


/****************************************************************
 * Constants
 */

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

#ifndef M_PI_2
#define M_PI_2 1.570796326794896619
#endif

#ifndef INFINITY
static inline float __port_infinity(void)
{
    static const unsigned __inf_bytes = 0x7f800000;
    return *(const float *)&__inf_bytes;
}
#define INFINITY __port_infinity()
#endif

#ifndef NAN
static inline float __port_nan(void)
{
    static const unsigned __nan_bytes = 0x7fc00000;
    return *(const float *)&__nan_bytes;
}
#define NAN __port_nan()
#endif


/****************************************************************
 * Function definitions (only when using libwine_port)
 */

#ifndef NO_LIBWINE_PORT

#ifndef HAVE_FSTATVFS
int fstatvfs( int fd, struct statvfs *buf );
#endif

#ifndef HAVE_GETOPT_LONG_ONLY
extern char *optarg;
extern int optind;
extern int opterr;
extern int optopt;
struct option;

#ifndef HAVE_STRUCT_OPTION_NAME
struct option
{
    const char *name;
    int has_arg;
    int *flag;
    int val;
};
#endif

extern int getopt_long (int ___argc, char *const *___argv,
                        const char *__shortopts,
                        const struct option *__longopts, int *__longind);
extern int getopt_long_only (int ___argc, char *const *___argv,
                             const char *__shortopts,
                             const struct option *__longopts, int *__longind);
#endif  /* HAVE_GETOPT_LONG_ONLY */

#ifndef HAVE_FFS
int ffs( int x );
#endif

#ifndef HAVE_ISFINITE
int isfinite(double x);
#endif

#ifndef HAVE_ISINF
int isinf(double x);
#endif

#ifndef HAVE_ISNAN
int isnan(double x);
#endif

#ifndef HAVE_LSTAT
int lstat(const char *file_name, struct stat *buf);
#endif /* HAVE_LSTAT */

#ifndef HAVE_MEMMOVE
void *memmove(void *dest, const void *src, size_t len);
#endif /* !defined(HAVE_MEMMOVE) */

#ifndef HAVE_POLL
struct pollfd
{
    int fd;
    short events;
    short revents;
};
#define POLLIN   0x01
#define POLLPRI  0x02
#define POLLOUT  0x04
#define POLLERR  0x08
#define POLLHUP  0x10
#define POLLNVAL 0x20
int poll( struct pollfd *fds, unsigned int count, int timeout );
#endif /* HAVE_POLL */

#ifndef HAVE_PREAD
ssize_t pread( int fd, void *buf, size_t count, off_t offset );
#endif /* HAVE_PREAD */

#ifndef HAVE_PWRITE
ssize_t pwrite( int fd, const void *buf, size_t count, off_t offset );
#endif /* HAVE_PWRITE */

#ifndef HAVE_READLINK
int readlink( const char *path, char *buf, size_t size );
#endif /* HAVE_READLINK */

#ifndef HAVE_STATVFS
int statvfs( const char *path, struct statvfs *buf );
#endif

#ifndef HAVE_STRNCASECMP
# ifndef HAVE__STRNICMP
int strncasecmp(const char *str1, const char *str2, size_t n);
# else
# define strncasecmp _strnicmp
# endif
#endif /* !defined(HAVE_STRNCASECMP) */

#ifndef HAVE_STRERROR
const char *strerror(int err);
#endif /* !defined(HAVE_STRERROR) */

#ifndef HAVE_STRCASECMP
# ifndef HAVE__STRICMP
int strcasecmp(const char *str1, const char *str2);
# else
# define strcasecmp _stricmp
# endif
#endif /* !defined(HAVE_STRCASECMP) */

#ifndef HAVE_SYMLINK
int symlink(const char *from, const char *to);
#endif

#ifndef HAVE_USLEEP
int usleep (unsigned int useconds);
#endif /* !defined(HAVE_USLEEP) */

#ifdef __i386__
static inline void *memcpy_unaligned( void *dst, const void *src, size_t size )
{
    return memcpy( dst, src, size );
}
#else
extern void *memcpy_unaligned( void *dst, const void *src, size_t size );
#endif /* __i386__ */

extern int mkstemps(char *template, int suffix_len);

/* Process creation flags */
#ifndef _P_WAIT
# define _P_WAIT    0
# define _P_NOWAIT  1
# define _P_OVERLAY 2
# define _P_NOWAITO 3
# define _P_DETACH  4
#endif
#ifndef HAVE__SPAWNVP
extern int _spawnvp(int mode, const char *cmdname, const char * const argv[]);
#endif

/* Interlocked functions */

#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))

static inline int interlocked_cmpxchg( int *dest, int xchg, int compare )
{
    int ret;
    __asm__ __volatile__( "lock; cmpxchgl %2,(%1)"
                          : "=a" (ret) : "r" (dest), "r" (xchg), "0" (compare) : "memory" );
    return ret;
}

static inline void *interlocked_cmpxchg_ptr( void **dest, void *xchg, void *compare )
{
    void *ret;
#ifdef __x86_64__
    __asm__ __volatile__( "lock; cmpxchgq %2,(%1)"
                          : "=a" (ret) : "r" (dest), "r" (xchg), "0" (compare) : "memory" );
#else
    __asm__ __volatile__( "lock; cmpxchgl %2,(%1)"
                          : "=a" (ret) : "r" (dest), "r" (xchg), "0" (compare) : "memory" );
#endif
    return ret;
}

static inline int interlocked_xchg( int *dest, int val )
{
    int ret;
    __asm__ __volatile__( "lock; xchgl %0,(%1)"
                          : "=r" (ret) : "r" (dest), "0" (val) : "memory" );
    return ret;
}

static inline void *interlocked_xchg_ptr( void **dest, void *val )
{
    void *ret;
#ifdef __x86_64__
    __asm__ __volatile__( "lock; xchgq %0,(%1)"
                          : "=r" (ret) :"r" (dest), "0" (val) : "memory" );
#else
    __asm__ __volatile__( "lock; xchgl %0,(%1)"
                          : "=r" (ret) : "r" (dest), "0" (val) : "memory" );
#endif
    return ret;
}

static inline int interlocked_xchg_add( int *dest, int incr )
{
    int ret;
    __asm__ __volatile__( "lock; xaddl %0,(%1)"
                          : "=r" (ret) : "r" (dest), "0" (incr) : "memory" );
    return ret;
}

#ifdef __x86_64__
static inline unsigned char interlocked_cmpxchg128( __int64 *dest, __int64 xchg_high,
                                                    __int64 xchg_low, __int64 *compare )
{
    unsigned char ret;
    __asm__ __volatile__( "lock cmpxchg16b %0; setz %b2"
                          : "=m" (dest[0]), "=m" (dest[1]), "=r" (ret),
                            "=a" (compare[0]), "=d" (compare[1])
                          : "m" (dest[0]), "m" (dest[1]), "3" (compare[0]), "4" (compare[1]),
                            "c" (xchg_high), "b" (xchg_low) );
    return ret;
}
#endif

#else  /* __GNUC__ */

#ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
static inline int interlocked_cmpxchg( int *dest, int xchg, int compare )
{
    return __sync_val_compare_and_swap( dest, compare, xchg );
}

static inline int interlocked_xchg_add( int *dest, int incr )
{
    return __sync_fetch_and_add( dest, incr );
}

static inline int interlocked_xchg( int *dest, int val )
{
    int ret;
    do ret = *dest; while (!__sync_bool_compare_and_swap( dest, ret, val ));
    return ret;
}
#else
extern int interlocked_cmpxchg( int *dest, int xchg, int compare );
extern int interlocked_xchg_add( int *dest, int incr );
extern int interlocked_xchg( int *dest, int val );
#endif

#if (defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4) && __SIZEOF_POINTER__ == 4) \
 || (defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8) && __SIZEOF_POINTER__ == 8)
static inline void *interlocked_cmpxchg_ptr( void **dest, void *xchg, void *compare )
{
    return __sync_val_compare_and_swap( dest, compare, xchg );
}

static inline void *interlocked_xchg_ptr( void **dest, void *val )
{
    void *ret;
    do ret = *dest; while (!__sync_bool_compare_and_swap( dest, ret, val ));
    return ret;
}
#else
extern void *interlocked_cmpxchg_ptr( void **dest, void *xchg, void *compare );
extern void *interlocked_xchg_ptr( void **dest, void *val );
#endif

#if defined(__x86_64__) || defined(__aarch64__) || defined(_WIN64)
extern unsigned char interlocked_cmpxchg128( __int64 *dest, __int64 xchg_high,
                                             __int64 xchg_low, __int64 *compare );
#endif

#endif  /* __GNUC__ */

#ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
static inline __int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compare )
{
    return __sync_val_compare_and_swap( dest, compare, xchg );
}
#else
extern __int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compare );
#endif

#else /* NO_LIBWINE_PORT */

#define __WINE_NOT_PORTABLE(func) func##_is_not_portable func##_is_not_portable

#define ffs                     __WINE_NOT_PORTABLE(ffs)
#define fstatvfs                __WINE_NOT_PORTABLE(fstatvfs)
#define getopt_long             __WINE_NOT_PORTABLE(getopt_long)
#define getopt_long_only        __WINE_NOT_PORTABLE(getopt_long_only)
#define interlocked_cmpxchg     __WINE_NOT_PORTABLE(interlocked_cmpxchg)
#define interlocked_cmpxchg_ptr __WINE_NOT_PORTABLE(interlocked_cmpxchg_ptr)
#define interlocked_xchg        __WINE_NOT_PORTABLE(interlocked_xchg)
#define interlocked_xchg_ptr    __WINE_NOT_PORTABLE(interlocked_xchg_ptr)
#define interlocked_xchg_add    __WINE_NOT_PORTABLE(interlocked_xchg_add)
#define lstat                   __WINE_NOT_PORTABLE(lstat)
#define memcpy_unaligned        __WINE_NOT_PORTABLE(memcpy_unaligned)
#undef memmove
#define memmove                 __WINE_NOT_PORTABLE(memmove)
#define pread                   __WINE_NOT_PORTABLE(pread)
#define pwrite                  __WINE_NOT_PORTABLE(pwrite)
#define spawnvp                 __WINE_NOT_PORTABLE(spawnvp)
#define statvfs                 __WINE_NOT_PORTABLE(statvfs)
#define strcasecmp              __WINE_NOT_PORTABLE(strcasecmp)
#define strerror                __WINE_NOT_PORTABLE(strerror)
#define strncasecmp             __WINE_NOT_PORTABLE(strncasecmp)
#define usleep                  __WINE_NOT_PORTABLE(usleep)

#endif /* NO_LIBWINE_PORT */

#endif /* !defined(__WINE_WINE_PORT_H) */