/* Invalid parameter handler for MSVC runtime libraries.
- Copyright (C) 2011 Free Software Foundation, Inc.
+ Copyright (C) 2011-2013 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ with this program; if not, see <http://www.gnu.org/licenses/>. */
#ifndef _MSVC_INVAL_H
#define _MSVC_INVAL_H
TRY_MSVC_INVAL
{
<Code that can trigger an invalid parameter notification
- but does not do 'return', 'break', nor 'goto'.>
+ but does not do 'return', 'break', 'continue', nor 'goto'.>
}
CATCH_MSVC_INVAL
{
<Code that handles an invalid parameter notification
- but does not do 'return', 'break', nor 'goto'.>
+ but does not do 'return', 'break', 'continue', nor 'goto'.>
}
- DONE_MSVC_INVAL
+ DONE_MSVC_INVAL;
+
+ This entire block expands to a single statement.
+
+ The handling of invalid parameters can be done in three ways:
+
+ * The default way, which is reasonable for programs (not libraries):
+ AC_DEFINE([MSVC_INVALID_PARAMETER_HANDLING], [DEFAULT_HANDLING])
+
+ * The way for libraries that make "hairy" calls (like close(-1), or
+ fclose(fp) where fileno(fp) is closed, or simply getdtablesize()):
+ AC_DEFINE([MSVC_INVALID_PARAMETER_HANDLING], [HAIRY_LIBRARY_HANDLING])
+
+ * The way for libraries that make no "hairy" calls:
+ AC_DEFINE([MSVC_INVALID_PARAMETER_HANDLING], [SANE_LIBRARY_HANDLING])
*/
-#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
-/* A native Windows platform with the "invalid parameter handler" concept. */
+#define DEFAULT_HANDLING 0
+#define HAIRY_LIBRARY_HANDLING 1
+#define SANE_LIBRARY_HANDLING 2
-/* Get _invalid_parameter_handler type and _set_invalid_parameter_handler
- declaration. */
-#include <stdlib.h>
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+ && !(MSVC_INVALID_PARAMETER_HANDLING == SANE_LIBRARY_HANDLING)
+/* A native Windows platform with the "invalid parameter handler" concept,
+ and either DEFAULT_HANDLING or HAIRY_LIBRARY_HANDLING. */
-# if defined _MSC_VER
-/* A compiler that supports __try/__except, as described in the page
- "try-except statement" on microsoft.com
- <http://msdn.microsoft.com/en-us/library/s58ftw19.aspx>.
- With __try/__except, we can use the multithread-safe exception handling. */
+# if MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+/* Default handling. */
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+/* Ensure that the invalid parameter handler in installed that just returns.
+ Because we assume no other part of the program installs a different
+ invalid parameter handler, this solution is multithread-safe. */
+extern void gl_msvc_inval_ensure_handler (void);
+
+# ifdef __cplusplus
+}
+# endif
+
+# define TRY_MSVC_INVAL \
+ do \
+ { \
+ gl_msvc_inval_ensure_handler (); \
+ if (1)
+# define CATCH_MSVC_INVAL \
+ else
+# define DONE_MSVC_INVAL \
+ } \
+ while (0)
+
+# else
+/* Handling for hairy libraries. */
+
+# include <excpt.h>
/* Gnulib can define its own status codes, as described in the page
"Raising Software Exceptions" on microsoft.com
same API. */
# define STATUS_GNULIB_INVALID_PARAMETER (0xE0000000 + 0x474E550 + 0)
-# ifdef __cplusplus
+# if defined _MSC_VER
+/* A compiler that supports __try/__except, as described in the page
+ "try-except statement" on microsoft.com
+ <http://msdn.microsoft.com/en-us/library/s58ftw19.aspx>.
+ With __try/__except, we can use the multithread-safe exception handling. */
+
+# ifdef __cplusplus
extern "C" {
-# endif
+# endif
/* Ensure that the invalid parameter handler in installed that raises a
software exception with code STATUS_GNULIB_INVALID_PARAMETER.
invalid parameter handler, this solution is multithread-safe. */
extern void gl_msvc_inval_ensure_handler (void);
-# ifdef __cplusplus
+# ifdef __cplusplus
}
-# endif
-
-# define TRY_MSVC_INVAL \
- gl_msvc_inval_ensure_handler (); \
- __try
-# define CATCH_MSVC_INVAL \
- __except (GetExceptionCode () == STATUS_GNULIB_INVALID_PARAMETER \
- ? EXCEPTION_EXECUTE_HANDLER \
- : EXCEPTION_CONTINUE_SEARCH)
-# define DONE_MSVC_INVAL
-
-# else
+# endif
+
+# define TRY_MSVC_INVAL \
+ do \
+ { \
+ gl_msvc_inval_ensure_handler (); \
+ __try
+# define CATCH_MSVC_INVAL \
+ __except (GetExceptionCode () == STATUS_GNULIB_INVALID_PARAMETER \
+ ? EXCEPTION_EXECUTE_HANDLER \
+ : EXCEPTION_CONTINUE_SEARCH)
+# define DONE_MSVC_INVAL \
+ } \
+ while (0)
+
+# else
/* Any compiler.
- We can only use setjmp/longjmp.
- Unfortunately, this is *not* multithread-safe. */
+ We can only use setjmp/longjmp. */
-# include <setjmp.h>
+# include <setjmp.h>
-# ifdef __cplusplus
+# ifdef __cplusplus
extern "C" {
-# endif
-
-/* The restart that will resume execution at the code between
- CATCH_MSVC_INVAL and DONE_MSVC_INVAL. It is enabled only between
- TRY_MSVC_INVAL and CATCH_MSVC_INVAL. */
-extern jmp_buf gl_msvc_inval_restart;
+# endif
+
+struct gl_msvc_inval_per_thread
+{
+ /* The restart that will resume execution at the code between
+ CATCH_MSVC_INVAL and DONE_MSVC_INVAL. It is enabled only between
+ TRY_MSVC_INVAL and CATCH_MSVC_INVAL. */
+ jmp_buf restart;
+
+ /* Tells whether the contents of restart is valid. */
+ int restart_valid;
+};
+
+/* Ensure that the invalid parameter handler in installed that passes
+ control to the gl_msvc_inval_restart if it is valid, or raises a
+ software exception with code STATUS_GNULIB_INVALID_PARAMETER otherwise.
+ Because we assume no other part of the program installs a different
+ invalid parameter handler, this solution is multithread-safe. */
+extern void gl_msvc_inval_ensure_handler (void);
-/* The invalid parameter handler that unwinds the stack up to the
- gl_msvc_inval_restart. It is enabled only between TRY_MSVC_INVAL
- and CATCH_MSVC_INVAL. */
-extern void cdecl gl_msvc_invalid_parameter_handler (const wchar_t *expression,
- const wchar_t *function,
- const wchar_t *file,
- unsigned int line,
- uintptr_t dummy);
+/* Return a pointer to the per-thread data for the current thread. */
+extern struct gl_msvc_inval_per_thread *gl_msvc_inval_current (void);
-# ifdef __cplusplus
+# ifdef __cplusplus
}
-# endif
+# endif
+
+# define TRY_MSVC_INVAL \
+ do \
+ { \
+ struct gl_msvc_inval_per_thread *msvc_inval_current; \
+ gl_msvc_inval_ensure_handler (); \
+ msvc_inval_current = gl_msvc_inval_current (); \
+ /* First, initialize gl_msvc_inval_restart. */ \
+ if (setjmp (msvc_inval_current->restart) == 0) \
+ { \
+ /* Then, mark it as valid. */ \
+ msvc_inval_current->restart_valid = 1;
+# define CATCH_MSVC_INVAL \
+ /* Execution completed. \
+ Mark gl_msvc_inval_restart as invalid. */ \
+ msvc_inval_current->restart_valid = 0; \
+ } \
+ else \
+ { \
+ /* Execution triggered an invalid parameter notification. \
+ Mark gl_msvc_inval_restart as invalid. */ \
+ msvc_inval_current->restart_valid = 0;
+# define DONE_MSVC_INVAL \
+ } \
+ } \
+ while (0)
-# define TRY_MSVC_INVAL \
- { \
- _invalid_parameter_handler orig_handler; \
- /* First, initialize gl_msvc_inval_restart. */ \
- if (setjmp (gl_msvc_inval_restart) == 0) \
- { \
- /* Then, enable gl_msvc_invalid_parameter_handler. */ \
- orig_handler = \
- _set_invalid_parameter_handler (gl_msvc_invalid_parameter_handler);
-# define CATCH_MSVC_INVAL \
- /* Execution completed. \
- Disable gl_msvc_invalid_parameter_handler. */ \
- _set_invalid_parameter_handler (orig_handler); \
- } \
- else \
- { \
- /* Execution triggered an invalid parameter notification. \
- Disable gl_msvc_invalid_parameter_handler. */ \
- _set_invalid_parameter_handler (orig_handler);
-# define DONE_MSVC_INVAL \
- } \
- }
+# endif
# endif
#else
-
-# define TRY_MSVC_INVAL if (1)
-# define CATCH_MSVC_INVAL else
-# define DONE_MSVC_INVAL
+/* A platform that does not need to the invalid parameter handler,
+ or when SANE_LIBRARY_HANDLING is desired. */
+
+/* The braces here avoid GCC warnings like
+ "warning: suggest explicit braces to avoid ambiguous 'else'". */
+# define TRY_MSVC_INVAL \
+ do \
+ { \
+ if (1)
+# define CATCH_MSVC_INVAL \
+ else
+# define DONE_MSVC_INVAL \
+ } \
+ while (0)
#endif
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