xos_r.h

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/* UnixWare 2.0, or other systems with thread support but no _r API. */
/* WARNING:  The h_addr_list and s_aliases values are *not* copied! */

typedef struct {
  struct hostent hent;
  char           h_name[MAXHOSTNAMELEN];
  struct hostent *hptr;
} _Xgethostbynameparams;
typedef struct {
  struct servent sent;
  char           s_name[255];
  char		 s_proto[255];
  struct servent *sptr;
} _Xgetservbynameparams;
# define _Xg_copyHostent(hp) \
   (memcpy(&(hp).hent, (hp).hptr, sizeof(struct hostent)), \
    strcpy((hp).h_name, (hp).hptr->h_name), \
    ((hp).hent.h_name = (hp).h_name), \
    ((hp).hptr = &(hp).hent), \
     0 )
# define _Xg_copyServent(sp) \
   (memcpy(&(sp).sent, (sp).sptr, sizeof(struct servent)), \
    strcpy((sp).s_name, (sp).sptr->s_name), \
    ((sp).sent.s_name = (sp).s_name), \
    strcpy((sp).s_proto, (sp).sptr->s_proto), \
    ((sp).sent.s_proto = (sp).s_proto), \
    ((sp).sptr = &(sp).sent), \
    0 )
# define _XGethostbyname(h,hp) \
   ((_Xos_processLock), \
    (((hp).hptr = gethostbyname((h))) ? _Xg_copyHostent(hp) : 0), \
    (_Xos_processUnlock), \
    (hp).hptr )
# define _XGethostbyaddr(a,al,t,hp) \
   ((_Xos_processLock), \
    (((hp).hptr = gethostbyaddr((a),(al),(t))) ? _Xg_copyHostent(hp) : 0), \
    (_Xos_processUnlock), \
    (hp).hptr )
# define _XGetservbyname(s,p,sp) \
   ((_Xos_processLock), \
    (((sp).sptr = getservbyname((s),(p))) ? _Xg_copyServent(sp) : 0), \
    (_Xos_processUnlock), \
    (sp).sptr )

#elif defined(XUSE_NETDB_R_API)
/*
 * POSIX does not specify _r equivalents for <netdb.h> API, but some
 * vendors provide them anyway.  Use them only when explicitly asked.
 */
# ifdef _POSIX_REENTRANT_FUNCTIONS
#  ifndef _POSIX_THREAD_SAFE_FUNCTIONS
#   if defined(AIXV3) || defined(AIXV4) || defined(__osf__)
#    define X_POSIX_THREAD_SAFE_FUNCTIONS 1
#   endif
#  endif
# endif
# ifdef _POSIX_THREAD_SAFE_FUNCTIONS
#  define X_POSIX_THREAD_SAFE_FUNCTIONS 1
# endif

# ifndef X_POSIX_THREAD_SAFE_FUNCTIONS
typedef struct {
    struct hostent      hent;
    char                hbuf[LINE_MAX];
    int                 herr;
} _Xgethostbynameparams;
typedef struct {
    struct servent      sent;
    char                sbuf[LINE_MAX];
} _Xgetservbynameparams;
#  define _XGethostbyname(h,hp) \
  gethostbyname_r((h),&(hp).hent,(hp).hbuf,sizeof((hp).hbuf),&(hp).herr)
#  define _XGethostbyaddr(a,al,t,hp) \
  gethostbyaddr_r((a),(al),(t),&(hp).hent,(hp).hbuf,sizeof((hp).hbuf),&(hp).herr)
#  define _XGetservbyname(s,p,sp) \
  getservbyname_r((s),(p),&(sp).sent,(sp).sbuf,sizeof((sp).sbuf))
# else
typedef struct {
  struct hostent      hent;
  struct hostent_data hdata;
} _Xgethostbynameparams;
typedef struct {
  struct servent      sent;
  struct servent_data sdata;
} _Xgetservbynameparams;
#  define _XGethostbyname(h,hp) \
  (bzero((char*)&(hp).hdata,sizeof((hp).hdata)),	\
   ((gethostbyname_r((h),&(hp).hent,&(hp).hdata) == -1) ? NULL : &(hp).hent))
#  define _XGethostbyaddr(a,al,t,hp) \
  (bzero((char*)&(hp).hdata,sizeof((hp).hdata)),	\
   ((gethostbyaddr_r((a),(al),(t),&(hp).hent,&(hp).hdata) == -1) ? NULL : &(hp).hent))
#  define _XGetservbyname(s,p,sp) \
  (bzero((char*)&(sp).sdata,sizeof((sp).sdata)),	\
   ((getservbyname_r((s),(p),&(sp).sent,&(sp).sdata) == -1) ? NULL : &(sp).sent) )
# endif
# ifdef X_POSIX_THREAD_SAFE_FUNCTIONS
#  undef X_POSIX_THREAD_SAFE_FUNCTIONS
# endif

#else
/* The regular API is assumed to be MT-safe under POSIX. */
typedef int _Xgethostbynameparams; /* dummy */
typedef int _Xgetservbynameparams; /* dummy */
# define _XGethostbyname(h,hp)		gethostbyname((h))
# define _XGethostbyaddr(a,al,t,hp)	gethostbyaddr((a),(al),(t))
# define _XGetservbyname(s,p,sp)	getservbyname((s),(p))
#endif /* X_INCLUDE_NETDB_H */

#if defined(X_INCLUDE_NETDB_H) && !defined(_XOS_INCLUDED_NETDB_H)
# define _XOS_INCLUDED_NETDB_H
#endif


/***** <dirent.h> wrappers *****/

/*
 * Effective prototypes for <dirent.h> wrappers:
 *
 * #define X_INCLUDE_DIRENT_H
 * #define XOS_USE_..._LOCKING
 * #include <X11/Xos_r.h>
 * 
 * typedef ... _Xreaddirparams;
 *
 * struct dirent *_XReaddir(DIR *dir_pointer, _Xreaddirparams);
 */

#if defined(X_INCLUDE_DIRENT_H) && !defined(_XOS_INCLUDED_DIRENT_H)
# include <sys/types.h>
# if !defined(X_NOT_POSIX) || defined(SYSV) || defined(USG)
#  include <dirent.h>
# else
#  include <sys/dir.h>
#  ifndef dirent
#   define dirent direct
#  endif
# endif
# if defined(XUSE_MTSAFE_API) || defined(XUSE_MTSAFE_DIRENTAPI)
#  define XOS_USE_MTSAFE_DIRENTAPI 1
# endif
#endif

#if !defined(X_INCLUDE_DIRENT_H) || defined(_XOS_INCLUDED_DIRENT_H)
/* Do nothing. */

#elif !defined(XTHREADS) && !defined(X_FORCE_USE_MTSAFE_API)
/* Use regular, unsafe API. */
typedef int _Xreaddirparams;	/* dummy */
# define _XReaddir(d,p)	readdir(d)

#elif !defined(XOS_USE_MTSAFE_DIRENTAPI) || defined(XNO_MTSAFE_DIRENTAPI)
/* Systems with thread support but no _r API. */
typedef struct {
  struct dirent *result;
  struct dirent dir_entry;
# ifdef _POSIX_PATH_MAX
  char buf[_POSIX_PATH_MAX];
# elif defined(NAME_MAX)
  char buf[NAME_MAX];
# else
  char buf[255];
# endif
} _Xreaddirparams;

# define _XReaddir(d,p)	\
 ( (_Xos_processLock),						 \
   (((p).result = readdir((d))) ?				 \
    (memcpy(&((p).dir_entry), (p).result, (p).result->d_reclen), \
     ((p).result = &(p).dir_entry), 0) :			 \
    0),								 \
   (_Xos_processUnlock),					 \
   (p).result )

#else
typedef struct {
  struct dirent *result;
  struct dirent dir_entry;
# ifdef _POSIX_PATH_MAX
  char buf[_POSIX_PATH_MAX];
# elif defined(NAME_MAX)
  char buf[NAME_MAX];
# else
  char buf[255];
# endif
} _Xreaddirparams;

# if defined(AIXV3) || defined(AIXV4) || defined(_POSIX_THREAD_SAFE_FUNCTIONS)
/* AIX defines the draft POSIX symbol, but uses the final API. */
/* POSIX final API, returns (int)0 on success. */
#  if defined(__osf__)
/* OSF/1 V4.0 <dirent.h> doesn't declare _Preaddir_r, breaking under C++. */
extern int _Preaddir_r(DIR *, struct dirent *, struct dirent **);
#  endif
#  define _XReaddir(d,p)						\
    (readdir_r((d), &((p).dir_entry), &((p).result)) ? NULL : (p).result)
# elif defined(_POSIX_REENTRANT_FUNCTIONS) && defined(__osf__)
/*
 * OSF/1 V3.2 readdir_r() will SEGV if the main program is not
 * explicitly linked with -lc_r.  The library REQUIREDLIBS don't help.
 * Assume that if threads have been initialized we're linked properly.
 */
#  define _XReaddir(d,p)						\
 ( (_Xos_isThreadInitialized) ?						\
   (readdir_r((d), &((p).dir_entry)) ? NULL : &((p).dir_entry)) :	\
   ((_Xos_processLock),							\
    (((p).result = readdir((d))) ?					\
     (memcpy(&((p).dir_entry), (p).result, (p).result->d_reclen),	\
      ((p).result = &(p).dir_entry), 0) :				\
     0),								\
    (_Xos_processUnlock),						\
    (p).result) )
# elif defined(_POSIX_REENTRANT_FUNCTIONS)
/* POSIX draft API, returns (int)0 on success. */
#  define _XReaddir(d,p)	\
    (readdir_r((d),&((p).dir_entry)) ? NULL : &((p).dir_entry))
# elif defined(SVR4)
/* Pre-POSIX API, returns non-NULL on success. */
#  define _XReaddir(d,p)	(readdir_r((d), &(p).dir_entry))
# else
/* We have no idea what is going on.  Fake it all using process locks. */
#  define _XReaddir(d,p)	\
    ( (_Xos_processLock),						\
      (((p).result = readdir((d))) ?					\
       (memcpy(&((p).dir_entry), (p).result, (p).result->d_reclen),	\
	((p).result = &(p).dir_entry), 0) :				\
       0),								\
      (_Xos_processUnlock),						\
      (p).result )
# endif
#endif /* X_INCLUDE_DIRENT_H */

#if defined(X_INCLUDE_DIRENT_H) && !defined(_XOS_INCLUDED_DIRENT_H)
# define _XOS_INCLUDED_DIRENT_H
#endif


/***** <unistd.h> wrappers *****/

/*
 * Effective prototypes for <unistd.h> wrappers:
 *
 * #define X_INCLUDE_UNISTD_H
 * #define XOS_USE_..._LOCKING
 * #include <X11/Xos_r.h>
 * 
 * typedef ... _Xgetloginparams;
 * typedef ... _Xttynameparams;
 *
 * char *_XGetlogin(_Xgetloginparams);
 * char *_XTtyname(int, _Xttynameparams);
 */

#if defined(X_INCLUDE_UNISTD_H) && !defined(_XOS_INCLUDED_UNISTD_H)
/* <unistd.h> already included by <X11/Xos.h> */
# if defined(XUSE_MTSAFE_API) || defined(XUSE_MTSAFE_UNISTDAPI)
#  define XOS_USE_MTSAFE_UNISTDAPI 1
# endif
#endif

#if !defined(X_INCLUDE_UNISTD_H) || defined(_XOS_INCLUDED_UNISTD_H)
/* Do nothing. */

#elif !defined(XTHREADS) && !defined(X_FORCE_USE_MTSAFE_API)
/* Use regular, unsafe API. */
typedef int _Xgetloginparams;	/* dummy */
typedef int _Xttynameparams;	/* dummy */
# define _XGetlogin(p)	getlogin()
# define _XTtyname(f)	ttyname((f))

#elif !defined(XOS_USE_MTSAFE_UNISTDAPI) || defined(XNO_MTSAFE_UNISTDAPI)
/* Systems with thread support but no _r API. */
typedef struct {
  char *result;
# if defined(MAXLOGNAME)
  char buf[MAXLOGNAME];
# elif defined(LOGIN_NAME_MAX)
  char buf[LOGIN_NAME_MAX];
# else
  char buf[64];
# endif
} _Xgetloginparams;
typedef struct {
  char *result;
# ifdef TTY_NAME_MAX
  char buf[TTY_NAME_MAX];
# elif defined(_POSIX_TTY_NAME_MAX)
  char buf[_POSIX_TTY_NAME_MAX];
# elif defined(_POSIX_PATH_MAX)
  char buf[_POSIX_PATH_MAX];
# else
  char buf[256];
# endif
} _Xttynameparams;

# define _XGetlogin(p) \
 ( (_Xos_processLock), \
   (((p).result = getlogin()) ? \
    (strncpy((p).buf, (p).result, sizeof((p).buf)), \
     ((p).buf[sizeof((p).buf)-1] = '\0'), \
     ((p).result = (p).buf), 0) : 0), \
   (_Xos_processUnlock), \
   (p).result )
#define _XTtyname(f,p) \
 ( (_Xos_processLock), \
   (((p).result = ttyname(f)) ? \
    (strncpy((p).buf, (p).result, sizeof((p).buf)), \
     ((p).buf[sizeof((p).buf)-1] = '\0'), \
     ((p).result = (p).buf), 0) : 0), \
   (_Xos_processUnlock), \
   (p).result )

#elif defined(_POSIX_THREAD_SAFE_FUNCTIONS) || defined(_POSIX_REENTRANT_FUNCTIONS)
/* POSIX API.
 *
 * extern int getlogin_r(char *, size_t);
 * extern int ttyname_r(int, char *, size_t);
 */
typedef struct {
# if defined(MAXLOGNAME)
  char buf[MAXLOGNAME];
# elif defined(LOGIN_NAME_MAX)
  char buf[LOGIN_NAME_MAX];
# else
  char buf[64];
# endif
} _Xgetloginparams;
typedef struct {
# ifdef TTY_NAME_MAX
  char buf[TTY_NAME_MAX];
# elif defined(_POSIX_TTY_NAME_MAX)
  char buf[_POSIX_TTY_NAME_MAX];
# elif defined(_POSIX_PATH_MAX)
  char buf[_POSIX_PATH_MAX];
# else
  char buf[256];
# endif
} _Xttynameparams;

# define _XGetlogin(p)	(getlogin_r((p).buf, sizeof((p).buf)) ? NULL : (p).buf)
# define _XTtyname(f,p)	\
	(ttyname_r((f), (p).buf, sizeof((p).buf)) ? NULL : (p).buf)

#else
/* Pre-POSIX API.
 *
 * extern char *getlogin_r(char *, size_t);
 * extern char *ttyname_r(int, char *, size_t);
 */
typedef struct {
# if defined(MAXLOGNAME)
  char buf[MAXLOGNAME];
# elif defined(LOGIN_NAME_MAX)
  char buf[LOGIN_NAME_MAX];
# else
  char buf[64];
# endif
} _Xgetloginparams;
typedef struct {
# ifdef TTY_NAME_MAX
  char buf[TTY_NAME_MAX];
# elif defined(_POSIX_TTY_NAME_MAX)
  char buf[_POSIX_TTY_NAME_MAX];
# elif defined(_POSIX_PATH_MAX)
  char buf[_POSIX_PATH_MAX];
# else
  char buf[256];
# endif
} _Xttynameparams;