1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
7 * C Implementation File *
9 * Copyright (C) 1992-2011, Free Software Foundation, Inc. *
11 * GNAT is free software; you can redistribute it and/or modify it under *
12 * terms of the GNU General Public License as published by the Free Soft- *
13 * ware Foundation; either version 3, or (at your option) any later ver- *
14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
16 * or FITNESS FOR A PARTICULAR PURPOSE. *
18 * As a special exception under Section 7 of GPL version 3, you are granted *
19 * additional permissions described in the GCC Runtime Library Exception, *
20 * version 3.1, as published by the Free Software Foundation. *
22 * You should have received a copy of the GNU General Public License and *
23 * a copy of the GCC Runtime Library Exception along with this program; *
24 * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
25 * <http://www.gnu.org/licenses/>. *
27 * GNAT was originally developed by the GNAT team at New York University. *
28 * Extensive contributions were provided by Ada Core Technologies Inc. *
30 ****************************************************************************/
32 /* This file contains system dependent symbols that are referenced in the
33 GNAT Run Time Library */
37 #if ! defined (VTHREADS)
40 #if ! defined (__RTP__) && (! defined (VTHREADS) || defined (__VXWORKSMILS__))
43 #include "selectLib.h"
64 #if defined (sun) && defined (__SVR4) && !defined (__vxworks)
65 /* The declaration is present in <time.h> but conditionalized
66 on a couple of macros we don't define. */
67 extern struct tm *localtime_r(const time_t *, struct tm *);
72 /* Don't use macros versions of this functions on VxWorks since they cause
73 imcompatible changes in some VxWorks versions */
85 (1) Opening a file with read mode fails if the file does not exist or
88 (2) Opening a file with append mode causes all subsequent writes to the
89 file to be forced to the then current end-of-file, regardless of
90 intervening calls to the fseek function.
92 (3) When a file is opened with update mode, both input and output may be
93 performed on the associated stream. However, output may not be directly
94 followed by input without an intervening call to the fflush function or
95 to a file positioning function (fseek, fsetpos, or rewind), and input
96 may not be directly followed by output without an intervening call to a
97 file positioning function, unless the input operation encounters
100 The other target dependent declarations here are for the two functions
101 __gnat_set_binary_mode and __gnat_set_text_mode:
103 void __gnat_set_binary_mode (int handle);
104 void __gnat_set_text_mode (int handle);
106 These functions have no effect in Unix (or similar systems where there is
107 no distinction between binary and text files), but in DOS (and similar
108 systems where text mode does CR/LF translation), these functions allow
109 the mode of the stream with the given handle (fileno can be used to get
110 the handle of a stream) to be changed dynamically. The returned result
111 is 0 if no error occurs and -1 if an error occurs.
113 Finally there is a boolean (character) variable
115 char __gnat_text_translation_required;
117 which is zero (false) in Unix mode, and one (true) in DOS mode, with a
118 true value indicating that text translation is required on text files
119 and that fopen supports the trailing t and b modifiers.
123 #if defined (WINNT) || defined (__CYGWIN__)
125 const char __gnat_text_translation_required = 1;
128 #define WIN_SETMODE setmode
131 #define WIN_SETMODE _setmode
135 __gnat_set_binary_mode (int handle)
137 WIN_SETMODE (handle, O_BINARY);
141 __gnat_set_text_mode (int handle)
143 WIN_SETMODE (handle, O_TEXT);
149 __gnat_ttyname (int filedes)
151 extern char *ttyname (int);
153 return ttyname (filedes);
156 #endif /* __CYGWIN__ */
158 #if defined (__CYGWIN__) || defined (__MINGW32__)
163 int __gnat_is_windows_xp (void);
166 __gnat_is_windows_xp (void)
168 static int is_win_xp=0, is_win_xp_checked=0;
170 if (!is_win_xp_checked)
172 OSVERSIONINFO version;
174 is_win_xp_checked = 1;
176 memset (&version, 0, sizeof (version));
177 version.dwOSVersionInfoSize = sizeof (version);
179 is_win_xp = GetVersionEx (&version)
180 && version.dwPlatformId == VER_PLATFORM_WIN32_NT
181 && (version.dwMajorVersion > 5
182 || (version.dwMajorVersion == 5 && version.dwMinorVersion >= 1));
189 /* Get the bounds of the stack. The stack pointer is supposed to be
190 initialized to BASE when a thread is created and the stack can be extended
191 to LIMIT before reaching a guard page.
192 Note: for the main thread, the system automatically extend the stack, so
193 LIMIT is only the current limit. */
196 __gnat_get_stack_bounds (void **base, void **limit)
200 /* We know that the first field of the TEB is the TIB. */
201 tib = (NT_TIB *)NtCurrentTeb ();
203 *base = tib->StackBase;
204 *limit = tib->StackLimit;
207 #endif /* __CYGWIN__ || __MINGW32__ */
211 /* Return the name of the tty. Under windows there is no name for
212 the tty, so this function, if connected to a tty, returns the generic name
216 __gnat_ttyname (int filedes)
218 if (isatty (filedes))
224 #endif /* __MINGW32__ */
228 const char __gnat_text_translation_required = 0;
230 /* These functions do nothing in non-DOS systems. */
233 __gnat_set_binary_mode (int handle ATTRIBUTE_UNUSED)
238 __gnat_set_text_mode (int handle ATTRIBUTE_UNUSED)
242 __gnat_ttyname (int filedes)
244 #if defined (__vxworks) || defined (__nucleus)
247 extern char *ttyname (int);
249 return ttyname (filedes);
250 #endif /* defined (__vxworks) || defined (__nucleus) */
254 #if defined (linux) || defined (sun) || defined (sgi) \
255 || (defined (__osf__) && ! defined (__alpha_vxworks)) || defined (WINNT) \
256 || defined (__MACHTEN__) || defined (__hpux__) || defined (_AIX) \
257 || (defined (__svr4__) && defined (i386)) || defined (__Lynx__) \
258 || defined (__CYGWIN__) || defined (__FreeBSD__) || defined (__OpenBSD__) \
259 || defined (__GLIBC__) || defined (__APPLE__)
265 #include <conio.h> /* for getch(), kbhit() */
273 extern char *decc$ga_stdscr;
274 static int initted = 0;
278 /* Implements the common processing for getc_immediate and
279 getc_immediate_nowait. */
281 extern void getc_immediate (FILE *, int *, int *);
282 extern void getc_immediate_nowait (FILE *, int *, int *, int *);
283 extern void getc_immediate_common (FILE *, int *, int *, int *, int);
285 /* Called by Get_Immediate (Foo); */
288 getc_immediate (FILE *stream, int *ch, int *end_of_file)
292 getc_immediate_common (stream, ch, end_of_file, &avail, 1);
295 /* Called by Get_Immediate (Foo, Available); */
298 getc_immediate_nowait (FILE *stream, int *ch, int *end_of_file, int *avail)
300 getc_immediate_common (stream, ch, end_of_file, avail, 0);
303 /* Called by getc_immediate () and getc_immediate_nowait () */
306 getc_immediate_common (FILE *stream,
312 #if defined (linux) || defined (sun) || defined (sgi) \
313 || (defined (__osf__) && ! defined (__alpha_vxworks)) \
314 || defined (__CYGWIN32__) || defined (__MACHTEN__) || defined (__hpux__) \
315 || defined (_AIX) || (defined (__svr4__) && defined (i386)) \
316 || defined (__Lynx__) || defined (__FreeBSD__) || defined (__OpenBSD__) \
317 || defined (__GLIBC__) || defined (__APPLE__)
321 int eof_ch = 4; /* Ctrl-D */
322 int fd = fileno (stream);
323 struct termios otermios_rec, termios_rec;
327 tcgetattr (fd, &termios_rec);
328 memcpy (&otermios_rec, &termios_rec, sizeof (struct termios));
330 /* Set RAW mode, with no echo */
331 termios_rec.c_lflag = termios_rec.c_lflag & ~ICANON & ~ECHO;
333 #if defined(linux) || defined (sun) || defined (sgi) \
334 || defined (__osf__) || defined (__MACHTEN__) || defined (__hpux__) \
335 || defined (_AIX) || (defined (__svr4__) && defined (i386)) \
336 || defined (__Lynx__) || defined (__FreeBSD__) || defined (__OpenBSD__) \
337 || defined (__GLIBC__) || defined (__APPLE__)
338 eof_ch = termios_rec.c_cc[VEOF];
340 /* If waiting (i.e. Get_Immediate (Char)), set MIN = 1 and wait for
341 a character forever. This doesn't seem to effect Ctrl-Z or
343 If not waiting (i.e. Get_Immediate (Char, Available)),
344 don't wait for anything but timeout immediately. */
345 termios_rec.c_cc[VMIN] = waiting;
346 termios_rec.c_cc[VTIME] = 0;
348 tcsetattr (fd, TCSANOW, &termios_rec);
352 /* Read is used here instead of fread, because fread doesn't
353 work on Solaris5 and Sunos4 in this situation. Maybe because we
354 are mixing calls that use file descriptors and streams. */
355 nread = read (fd, &c, 1);
358 /* On Unix terminals, Ctrl-D (EOT) is an End of File. */
366 /* Everything else is ok */
367 else if (c != eof_ch)
385 tcsetattr (fd, TCSANOW, &otermios_rec);
391 int fd = fileno (stream);
402 *ch = decc$bsd_wgetch (decc$ga_stdscr);
410 decc$bsd_nocbreak ();
413 #elif defined (__MINGW32__)
414 int fd = fileno (stream);
416 int eot_ch = 4; /* Ctrl-D */
433 char_waiting = kbhit();
435 if (char_waiting == 1)
453 #elif defined (__vxworks)
454 /* Bit masks of file descriptors to read from. */
455 struct fd_set readFds;
456 /* Timeout before select returns if nothing can be read. */
457 struct timeval timeOut;
459 int fd = fileno (stream);
468 /* If we do not want to wait, we have to set up fd in RAW mode. This
469 should be done outside this function as setting fd in RAW mode under
470 vxWorks flushes the buffer of fd. If the RAW mode was set here, the
471 buffer would be empty and we would always return that no character
475 /* Initialization of timeOut for its use with select. */
479 /* Initialization of readFds for its use with select;
480 FD is the only file descriptor to be monitored */
482 FD_SET (fd, &readFds);
485 /* We do all this processing to emulate a non blocking read. */
486 readable = select (width, &readFds, NULL, NULL, &timeOut);
487 if (readable == ERROR)
488 *avail = -1, *end_of_file = -1;
489 /* No character available in input. */
490 else if (readable == 0)
491 *avail = 0, *end_of_file = 0;
494 nread = read (fd, &c, 1);
496 *avail = 1, *end_of_file = 0;
499 *avail = 0, *end_of_file = 1;
502 *avail = -1, *end_of_file = -1;
506 /* We have to wait until we get a character */
512 /* Save the current mode of FD. */
513 option = ioctl (fd, FIOGETOPTIONS, 0);
515 /* Set FD in RAW mode. */
516 status = ioctl (fd, FIOSETOPTIONS, OPT_RAW);
519 nread = read (fd, &c, 1);
521 *avail = 1, *end_of_file = 0;
524 *avail = 0, *end_of_file = 1;
525 /* Else there is an ERROR. */
528 /* Revert FD to its previous mode. */
529 status = ioctl (fd, FIOSETOPTIONS, option);
537 /* If we're not on a terminal, then we don't need any fancy processing.
538 Also this is the only thing that's left if we're not on one of the
539 supported systems; which means that for non supported systems,
540 get_immediate may wait for a carriage return on terminals. */
541 *ch = fgetc (stream);
555 /* The following definitions are provided in NT to support Windows based
561 /* Provide functions to echo the values passed to WinMain (windows bindings
562 will want to import these). We use the same names as the routines used
563 by AdaMagic for compatibility. */
565 char *rts_get_hInstance (void);
566 char *rts_get_hPrevInstance (void);
567 char *rts_get_lpCommandLine (void);
568 int rts_get_nShowCmd (void);
571 rts_get_hInstance (void)
573 return (char *)GetModuleHandleA (0);
577 rts_get_hPrevInstance (void)
583 rts_get_lpCommandLine (void)
585 return GetCommandLineA ();
589 rts_get_nShowCmd (void)
597 /* This gets around a problem with using the old threads library on VMS 7.0. */
599 extern long get_gmtoff (void);
607 t = time ((time_t) 0);
609 return ts->tm_gmtoff;
613 /* This value is returned as the time zone offset when a valid value
614 cannot be determined. It is simply a bizarre value that will never
615 occur. It is 3 days plus 73 seconds (offset is in seconds). */
617 long __gnat_invalid_tzoff = 259273;
619 /* Definition of __gnat_localtime_r used by a-calend.adb */
621 #if defined (__MINGW32__)
625 /* For the Cert run times on native Windows we use dummy functions
626 for locking and unlocking tasks since we do not support multiple
627 threads on this configuration (Cert run time on native Windows). */
631 void (*Lock_Task) () = &dummy;
632 void (*Unlock_Task) () = &dummy;
636 #define Lock_Task system__soft_links__lock_task
637 extern void (*Lock_Task) (void);
639 #define Unlock_Task system__soft_links__unlock_task
640 extern void (*Unlock_Task) (void);
644 /* Reentrant localtime for Windows. */
647 __gnat_localtime_tzoff (const time_t *, long *);
649 static const unsigned long long w32_epoch_offset = 11644473600ULL;
651 __gnat_localtime_tzoff (const time_t *timer, long *off)
656 unsigned long long ull_time;
657 } utc_time, local_time;
659 SYSTEMTIME utc_sys_time, local_sys_time;
660 TIME_ZONE_INFORMATION tzi;
669 tzi_status = GetTimeZoneInformation (&tzi);
671 if (tzi_status == TIME_ZONE_ID_STANDARD)
672 /* The system is operating in the range covered by the StandardDate
674 *off = *off + tzi.StandardBias;
675 else if (tzi_status == TIME_ZONE_ID_DAYLIGHT)
676 /* The system is operating in the range covered by the DaylightDate
678 *off = *off + tzi.DaylightBias;
683 /* First convert unix time_t structure to windows FILETIME format. */
684 utc_time.ull_time = ((unsigned long long) *timer + w32_epoch_offset)
687 tzi_status = GetTimeZoneInformation (&tzi);
689 /* If GetTimeZoneInformation does not return a value between 0 and 2 then
690 it means that we were not able to retrieve timezone informations.
691 Note that we cannot use here FileTimeToLocalFileTime as Windows will use
692 in always in this case the current timezone setting. As suggested on
693 MSDN we use the following three system calls to get the right information.
694 Note also that starting with Windows Vista new functions are provided to
695 get timezone settings that depend on the year. We cannot use them as we
696 still support Windows XP and Windows 2003. */
697 status = (tzi_status >= 0 && tzi_status <= 2)
698 && FileTimeToSystemTime (&utc_time.ft_time, &utc_sys_time)
699 && SystemTimeToTzSpecificLocalTime (&tzi, &utc_sys_time, &local_sys_time)
700 && SystemTimeToFileTime (&local_sys_time, &local_time.ft_time);
703 /* An error occurs so return invalid_tzoff. */
704 *off = __gnat_invalid_tzoff;
706 if (local_time.ull_time > utc_time.ull_time)
707 *off = (long) ((local_time.ull_time - utc_time.ull_time) / 10000000ULL);
709 *off = - (long) ((utc_time.ull_time - local_time.ull_time) / 10000000ULL);
718 /* On Lynx, all time values are treated in GMT */
720 #if defined (__Lynx__)
722 /* As of LynxOS 3.1.0a patch level 040, LynuxWorks changes the
723 prototype to the C library function localtime_r from the POSIX.4
724 Draft 9 to the POSIX 1.c version. Before this change the following
725 spec is required. Only use when ___THREADS_POSIX4ad4__ is defined,
726 the Lynx convention when building against the legacy API. */
729 __gnat_localtime_tzoff (const time_t *, long *);
732 __gnat_localtime_tzoff (const time_t *timer, long *off)
739 /* VMS does not need __gnat_localtime_tzoff */
743 /* Other targets except Lynx, VMS and Windows provide a standard localtime_r */
747 #define Lock_Task system__soft_links__lock_task
748 extern void (*Lock_Task) (void);
750 #define Unlock_Task system__soft_links__unlock_task
751 extern void (*Unlock_Task) (void);
754 __gnat_localtime_tzoff (const time_t *, long *);
757 __gnat_localtime_tzoff (const time_t *timer, long *off)
761 /* AIX, HPUX, SGI Irix, Sun Solaris */
762 #if defined (_AIX) || defined (__hpux__) || defined (sgi) || defined (sun)
766 localtime_r (timer, &tp);
767 *off = (long) -timezone;
771 /* Correct the offset if Daylight Saving Time is in effect */
778 #elif defined (__vxworks)
783 localtime_r (timer, &tp);
785 /* Try to read the environment variable TIMEZONE. The variable may not have
786 been initialize, in that case return an offset of zero (0) for UTC. */
788 char *tz_str = getenv ("TIMEZONE");
790 if ((tz_str == NULL) || (*tz_str == '\0'))
794 char *tz_start, *tz_end;
796 /* The format of the data contained in TIMEZONE is N::U:S:E where N is the
797 name of the time zone, U are the minutes difference from UTC, S is the
798 start of DST in mmddhh and E is the end of DST in mmddhh. Extracting
799 the value of U involves setting two pointers, one at the beginning and
800 one at the end of the value. The end pointer is then set to null in
801 order to delimit a string slice for atol to process. */
803 tz_start = index (tz_str, ':') + 2;
804 tz_end = index (tz_start, ':');
807 /* The Ada layer expects an offset in seconds. Note that we must reverse
808 the sign of the result since west is positive and east is negative on
811 *off = -atol (tz_start) * 60;
813 /* Correct the offset if Daylight Saving Time is in effect */
822 /* Darwin, Free BSD, Linux, Tru64, where component tm_gmtoff is present in
825 #elif defined (__APPLE__) || defined (__FreeBSD__) || defined (linux) ||\
826 (defined (__alpha__) && defined (__osf__)) || defined (__GLIBC__)
828 localtime_r (timer, &tp);
832 /* Default: treat all time values in GMT */
848 /* __gnat_get_task_options is used by s-taprop.adb only for VxWorks. This
849 function returns the options to be set when creating a new task. It fetches
850 the options assigned to the current task (parent), so offering some user
851 level control over the options for a task hierarchy. It forces VX_FP_TASK
852 because it is almost always required. On processors with the SPE
853 category, VX_SPE_TASK should be used instead to enable the SPE. */
854 extern int __gnat_get_task_options (void);
857 __gnat_get_task_options (void)
861 /* Get the options for the task creator */
862 taskOptionsGet (taskIdSelf (), &options);
864 /* Force VX_FP_TASK or VX_SPE_TASK as needed */
865 #if defined (__SPE__)
866 options |= VX_SPE_TASK;
868 options |= VX_FP_TASK;
871 /* Mask those bits that are not under user control */
872 #ifdef VX_USR_TASK_OPTIONS
873 return options & VX_USR_TASK_OPTIONS;
882 __gnat_is_file_not_found_error (int errno_val) {
886 /* In the case of VxWorks, we also have to take into account various
887 * filesystem-specific variants of this error.
889 #if ! defined (VTHREADS)
890 case S_dosFsLib_FILE_NOT_FOUND:
892 #if ! defined (__RTP__) && (! defined (VTHREADS) || defined (__VXWORKSMILS__))
893 case S_nfsLib_NFSERR_NOENT: