diff options
Diffstat (limited to 'gen-soconn/gsocket.h')
| -rw-r--r-- | gen-soconn/gsocket.h | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/gen-soconn/gsocket.h b/gen-soconn/gsocket.h index 01c7e28..ff175dd 100644 --- a/gen-soconn/gsocket.h +++ b/gen-soconn/gsocket.h @@ -6,7 +6,7 @@ * * * C Header File * * * - * Copyright (C) 2004-2005, Free Software Foundation, Inc. * + * Copyright (C) 2004-2006, Free Software Foundation, Inc. * * * * GNAT is free software; you can redistribute it and/or modify it under * * terms of the GNU General Public License as published by the Free Soft- * @@ -154,3 +154,33 @@ #include <sys/ioctl.h> #include <netdb.h> #endif + +/* + * Handling of gethostbyname, gethostbyaddr, getservbyname and getservbyport + * ========================================================================= + * + * The default implementation of GNAT.Sockets.Thin requires that these + * operations be either thread safe, or that a reentrant version getXXXbyYYY_r + * be provided. In both cases, socket.c provides a __gnat_safe_getXXXbyYYY + * function with the same signature as getXXXbyYYY_r. If the operating + * system version of getXXXbyYYY is thread safe, the provided auxiliary + * buffer argument is unused and ignored. + * + * Target specific versions of GNAT.Sockets.Thin for platforms that can't + * fulfill these requirements must provide their own protection mechanism + * in Safe_GetXXXbyYYY, and if they require GNAT.Sockets to provide a buffer + * to this effect, then we need to set Need_Netdb_Buffer here (case of + * VxWorks and VMS). + */ + +#if defined (_AIX) || defined (__FreeBSD__) || defined (__hpux__) || defined (__osf__) || defined (_WIN32) || defined (__APPLE__) +# define HAVE_THREAD_SAFE_GETxxxBYyyy 1 +#elif defined (sgi) || defined (linux) || (defined (sun) && defined (__SVR4) && !defined (__vxworks)) +# define HAVE_GETxxxBYyyy_R 1 +#endif + +#if defined (HAVE_GETxxxBYyyy_R) || !defined (HAVE_THREAD_SAFE_GETxxxBYyyy) +# define Need_Netdb_Buffer 1 +#else +# define Need_Netdb_Buffer 0 +#endif |