X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/c829167929dfa54fafb6d016ff750765785e2686..ef895bbb1784eda4b7f274eafad19c602cef75f5:/include/xbt/ex.h diff --git a/include/xbt/ex.h b/include/xbt/ex.h index 8d73645118..45241064ff 100644 --- a/include/xbt/ex.h +++ b/include/xbt/ex.h @@ -1,486 +1,91 @@ -/* -** OSSP ex - Exception Handling (modified to fit into SimGrid) -** Copyright (c) 2005 Martin Quinson. -** Copyright (c) 2002-2004 Ralf S. Engelschall -** Copyright (c) 2002-2004 The OSSP Project -** Copyright (c) 2002-2004 Cable & Wireless -** -** This file is part of OSSP ex, an exception handling library -** which can be found at http://www.ossp.org/pkg/lib/ex/. -** -** Permission to use, copy, modify, and distribute this software for -** any purpose with or without fee is hereby granted, provided that -** the above copyright notice and this permission notice appear in all -** copies. -** -** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED -** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF -** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. -** IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR -** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF -** USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND -** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, -** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT -** OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -** SUCH DAMAGE. -** -** ex.h: exception handling (pre-processor part) -*/ +/* Copyright (c) 2005-2019. The SimGrid Team. All rights reserved. */ -#ifndef __XBT_EX_H__ -#define __XBT_EX_H__ +/* This program is free software; you can redistribute it and/or modify it + * under the terms of the license (GNU LGPL) which comes with this package. */ -#include -#include - -/* do not include execinfo.h directly since it's not always available. - Instead, copy the parts we need (and fake when it's not there) */ -extern int backtrace (void **__array, int __size); - -/* required ISO-C standard facilities */ -#include -#include +#ifndef XBT_EX_H +#define XBT_EX_H -/* the machine context */ -#if defined(__EX_MCTX_MCSC__) -#include /* POSIX.1 ucontext(3) */ -#define __ex_mctx_struct ucontext_t uc; -#define __ex_mctx_save(mctx) (getcontext(&(mctx)->uc) == 0) -#define __ex_mctx_restored(mctx) /* noop */ -#define __ex_mctx_restore(mctx) (void)setcontext(&(mctx)->uc) +#include -#elif defined(__EX_MCTX_SSJLJ__) -#include /* POSIX.1 sigjmp_buf(3) */ -#define __ex_mctx_struct sigjmp_buf jb; -#define __ex_mctx_save(mctx) (sigsetjmp((mctx)->jb, 1) == 0) -#define __ex_mctx_restored(mctx) /* noop */ -#define __ex_mctx_restore(mctx) (void)siglongjmp((mctx)->jb, 1) - -#elif defined(__EX_MCTX_SJLJ__) || !defined(__EX_MCTX_CUSTOM__) -#include /* ISO-C jmp_buf(3) */ -#define __ex_mctx_struct jmp_buf jb; -#define __ex_mctx_save(mctx) (setjmp((mctx)->jb) == 0) -#define __ex_mctx_restored(mctx) /* noop */ -#define __ex_mctx_restore(mctx) (void)longjmp((mctx)->jb, 1) -#endif +#include +#include +#include +#include -/* declare the machine context type */ -typedef struct { __ex_mctx_struct } __ex_mctx_t; - -/** @addtogroup XBT_ex - * @brief A set of macros providing exception a la C++ in ANSI C (grounding feature) - * - * This module is a small ISO-C++ style exception handling library - * for use in the ISO-C language. It allows you to use the paradigm - * of throwing and catching exceptions in order to reduce the amount - * of error handling code without hindering program robustness. - * - * This is achieved by directly transferring exceptional return codes - * (and the program control flow) from the location where the exception - * is raised (throw point) to the location where it is handled (catch - * point) -- usually from a deeply nested sub-routine to a parent - * routine. All intermediate routines no longer have to make sure that - * the exceptional return codes from sub-routines are correctly passed - * back to the parent. - * - * These features are brought to you by a modified version of the libex - * library, one of the numerous masterpiece of Ralf S. Engelschall. - * - * \htmlonly
\endhtmlonly - * - * @section XBT_ex_toc TABLE OF CONTENTS - * - * - \ref XBT_ex_intro - * - \ref XBT_ex_base - * - \ref XBT_ex_pitfalls - * - * \htmlonly
\endhtmlonly - * - * @section XBT_ex_intro DESCRIPTION - * - * In SimGrid, an exception is a triple <\a msg , \a category , \a value> - * where \a msg is a human-readable text describing the exceptional - * condition, \a code an integer describing what went wrong and \a value - * providing a sort of sub-category. (this is different in the original libex). - * - * @section XBT_ex_base BASIC USAGE - * - * \em TRY \b TRIED_BLOCK [\em CLEANUP \b CLEANUP_BLOCK] \em CATCH (variable) \b CATCH_BLOCK +/** @addtogroup XBT_ex_c + * @brief Exceptions support (C) * - * This is the primary syntactical construct provided. It is modeled after the - * ISO-C++ try-catch clause and should sound familiar to most of you. - * - * Any exception thrown directly from the TRIED_BLOCK block or from called - * subroutines is caught. Cleanups which must be done after this block - * (whenever an exception arised or not) should be placed into the optionnal - * CLEANUP_BLOCK. The code dealing with the exceptions when they arise should - * be placed into the (mandatory) CATCH_BLOCK. - * - * - * In absence of exception, the control flow goes into the blocks TRIED_BLOCK - * and CLEANUP_BLOCK (if present); The CATCH_BLOCK block is then ignored. - * - * When an exception is thrown, the control flow goes through the following - * blocks: TRIED_BLOCK (up to the statement throwing the exception), - * CLEANUP_BLOCK (if any) and CATCH_BLOCK. The exception is stored in a - * variable for inspection inside the CATCH_BLOCK. This variable must be - * declared in the outter scope, but its value is only valid within the - * CATCH_BLOCK block. - * - * Some notes: - * - TRY, CLEANUP and CATCH cannot be used separately, they work - * only in combination and form a language clause as a whole. - * - In contrast to the syntax of other languages (such as C++ or Jave) there - * is only one CATCH block and not multiple ones (all exceptions are - * of the same \em xbt_ex_t C type). - * - the variable of CATCH can naturally be reused in subsequent - * CATCH clauses. - * - it is possible to nest TRY clauses. - * - * The TRY block is a regular ISO-C language statement block, but it is not - * allowed to jump into it via "goto" or longjmp(3) or out of it via "break", - * "return", "goto" or longjmp(3) because there is some hidden setup and - * cleanup that needs to be done regardless of whether an exception is - * caught. Bypassing these steps will break the exception handling facility. - * - * The CLEANUP and CATCH blocks are regular ISO-C language statement - * blocks without any restrictions. You are even allowed to throw (and, in the - * CATCH block, to re-throw) exceptions. - * - * There is one subtle detail you should remember about TRY blocks: - * Variables used in the CLEANUP or CATCH clauses must be declared with - * the storage class "volatile", otherwise they might contain outdated - * information if an exception it thrown. - * - * - * This is because you usually do not know which commands in the TRY - * were already successful before the exception was thrown (logically speaking) - * and because the underlying ISO-C setjmp(3) facility applies those - * restrictions (technically speaking). As a matter of fact, value changes - * between the TRY and the THROW may be discarded if you forget the - * "volatile" keyword. - * - * \section XBT_ex_pitfalls PROGRAMMING PITFALLS - * - * Exception handling is a very elegant and efficient way of dealing with - * exceptional situation. Nevertheless it requires additional discipline in - * programming and there are a few pitfalls one must be aware of. Look the - * following code which shows some pitfalls and contains many errors (assuming - * a mallocex() function which throws an exception if malloc(3) fails): - * - * \dontinclude ex.c - * \skip BAD_EXAMPLE - * \until end_of_bad_example - * - * This example raises a few issues: - * -# \b variable \b scope \n - * Variables which are used in the CLEANUP or CATCH clauses must be - * declared before the TRY clause, otherwise they only exist inside the - * TRY block. In the example above, cp1, cp2 and cp3 only exist in the - * TRY block and are invisible from the CLEANUP and CATCH - * blocks. - * -# \b variable \b initialization \n - * Variables which are used in the CLEANUP or CATCH clauses must - * be initialized before the point of the first possible THROW is - * reached. In the example above, CLEANUP would have trouble using cp3 - * if mallocex() throws a exception when allocating a TOOBIG buffer. - * -# \b volatile \b variable \n - * Variables which are used in the CLEANUP or CATCH clauses MUST BE - * DECLARED AS "volatile", otherwise they might contain outdated - * information when an exception is thrown. - * -# \b clean \b before \b catch \n - * The CLEANUP clause is not only place before the CATCH clause in - * the source code, it also occures before in the control flow. So, - * resources being cleaned up cannot be used in the CATCH block. In the - * example, c3 gets freed before the printf placed in CATCH. - * -# \b variable \b uninitialization \n - * If resources are passed out of the scope of the - * TRY/CLEANUP/CATCH construct, they naturally shouldn't get - * cleaned up. The example above does free(3) cp1 in CLEANUP although - * its value was affected to globalcontext->first, invalidating this - * pointer. + * Those fonctions are used to throw C++ exceptions from C code. This feature + * should probably be removed in the future because C and exception do not + * exactly play nicely together. + */ - * The following is fixed version of the code (annotated with the pitfall items - * for reference): +/** Categories of errors * - * \skip GOOD_EXAMPLE - * \until end_of_good_example + * This very similar to std::error_catgory and should probably be replaced + * by this in the future. * - * @{ + * @ingroup XBT_ex_c */ - -/** @brief different kind of errors */ typedef enum { - unknown_error=0, /**< unknown error */ - arg_error, /**< Invalid argument */ - mismatch_error, /**< The provided ID does not match */ - not_found_error, /**< The searched element was not found */ - - system_error, /**< a syscall did fail */ - network_error, /**< error while sending/receiving data */ - timeout_error, /**< not quick enough, dude */ - thread_error /**< error while [un]locking */ + unknown_error = 0, /**< unknown error */ + arg_error, /**< Invalid argument */ + bound_error, /**< Out of bounds argument */ + mismatch_error, /**< The provided ID does not match */ + not_found_error, /**< The searched element was not found */ + system_error, /**< a syscall did fail */ + network_error, /**< error while sending/receiving data */ + timeout_error, /**< not quick enough, dude */ + cancel_error, /**< an action was canceled */ + thread_error, /**< error while [un]locking */ + host_error, /**< host failed */ + tracing_error, /**< error during the simulation tracing */ + io_error, /**< disk or file error */ + vm_error /**< vm error */ } xbt_errcat_t; -const char * xbt_ex_catname(xbt_errcat_t cat); - -/** @brief Structure describing an exception */ -typedef struct { - char *msg; /**< human readable message; to be freed */ - xbt_errcat_t category; /**< category like HTTP (what went wrong) */ - int value; /**< like errno (why did it went wrong) */ - /* throw point */ - short remote; /* whether it was raised remotely */ - char *host; /* NULL for localhost; hostname if remote */ - /* FIXME: host should be hostname:port[#thread] */ - char *procname; - char *file; /**< to be freed only for remote exceptions */ - int line; - char *func; /**< to be freed only for remote exceptions */ - /* Backtrace */ - int used; - char **bt_strings; /* only filed on display (or before the network propagation) */ - void *bt[XBT_BACKTRACE_SIZE]; -} xbt_ex_t; - -/* declare the context type (private) */ -typedef struct { - __ex_mctx_t *ctx_mctx; /* permanent machine context of enclosing try/catch */ - volatile int ctx_caught; /* temporary flag whether exception was caught */ - volatile xbt_ex_t ctx_ex; /* temporary exception storage */ -} ex_ctx_t; +SG_BEGIN_DECL() -/* the static and dynamic initializers for a context structure */ -#define XBT_CTX_INITIALIZER \ - { NULL, 0, { /* content */ NULL, unknown_error, 0, \ - /* throw point*/ 0,NULL, NULL, NULL, 0, NULL,\ - /* backtrace */ 0,NULL,{NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL} } } -#define XBT_CTX_INITIALIZE(ctx) \ - do { \ - (ctx)->ctx_mctx = NULL; \ - (ctx)->ctx_caught = 0; \ - (ctx)->ctx_ex.msg = NULL; \ - (ctx)->ctx_ex.category = 0; \ - (ctx)->ctx_ex.value = 0; \ - (ctx)->ctx_ex.remote = 0; \ - (ctx)->ctx_ex.host = NULL; \ - (ctx)->ctx_ex.procname = NULL; \ - (ctx)->ctx_ex.file = NULL; \ - (ctx)->ctx_ex.line = 0; \ - (ctx)->ctx_ex.func = NULL; \ - (ctx)->ctx_ex.bt[0] = NULL; \ - (ctx)->ctx_ex.bt[1] = NULL; \ - (ctx)->ctx_ex.bt[2] = NULL; \ - (ctx)->ctx_ex.bt[3] = NULL; \ - (ctx)->ctx_ex.bt[4] = NULL; \ - (ctx)->ctx_ex.bt[5] = NULL; \ - (ctx)->ctx_ex.bt[6] = NULL; \ - (ctx)->ctx_ex.bt[7] = NULL; \ - (ctx)->ctx_ex.bt[8] = NULL; \ - (ctx)->ctx_ex.bt[9] = NULL; \ - (ctx)->ctx_ex.used = 0; \ - (ctx)->ctx_ex.bt_strings = NULL; \ - } while (0) - -/* the exception context */ -typedef ex_ctx_t *(*ex_ctx_cb_t)(void); -extern ex_ctx_cb_t __xbt_ex_ctx; -extern ex_ctx_t *__xbt_ex_ctx_default(void); - -/* the termination handler */ -typedef void (*ex_term_cb_t)(xbt_ex_t *); -extern ex_term_cb_t __xbt_ex_terminate; -extern void __xbt_ex_terminate_default(xbt_ex_t *e); - -/** @brief Introduce a block where exception may be dealed with - * @hideinitializer +/** Get the name of a category + * @ingroup XBT_ex_c */ -#define TRY \ - { \ - ex_ctx_t *__xbt_ex_ctx_ptr = __xbt_ex_ctx(); \ - int __ex_cleanup = 0; \ - __ex_mctx_t *__ex_mctx_en; \ - __ex_mctx_t __ex_mctx_me; \ - __ex_mctx_en = __xbt_ex_ctx_ptr->ctx_mctx; \ - __xbt_ex_ctx_ptr->ctx_mctx = &__ex_mctx_me; \ - if (__ex_mctx_save(&__ex_mctx_me)) { \ - if (1) +XBT_PUBLIC const char* xbt_ex_catname(xbt_errcat_t cat); -/** @brief optional(!) block for cleanup - * @hideinitializer - */ -#define CLEANUP \ - else { \ - } \ - __xbt_ex_ctx_ptr->ctx_caught = 0; \ - } else { \ - __ex_mctx_restored(&__ex_mctx_me); \ - __xbt_ex_ctx_ptr->ctx_caught = 1; \ - } \ - __xbt_ex_ctx_ptr->ctx_mctx = __ex_mctx_en; \ - __ex_cleanup = 1; \ - if (1) { \ - if (1) +/** Helper function used to throw exceptions in C */ +XBT_ATTRIB_NORETURN XBT_PUBLIC void _xbt_throw(char* message, xbt_errcat_t errcat, int value, const char* file, + int line, const char* func); -#ifndef DOXYGEN_SKIP -# ifdef __cplusplus -# define XBT_EX_T_CPLUSPLUSCAST (xbt_ex_t&) -# else -# define XBT_EX_T_CPLUSPLUSCAST -# endif -#endif - -/** @brief the block for catching (ie, deal with) an exception +/** Builds and throws an exception + * @ingroup XBT_ex_c * @hideinitializer */ -#define CATCH(e) \ - else { \ - } \ - if (!(__ex_cleanup)) \ - __xbt_ex_ctx_ptr->ctx_caught = 0; \ - } else { \ - if (!(__ex_cleanup)) { \ - __ex_mctx_restored(&__ex_mctx_me); \ - __xbt_ex_ctx_ptr->ctx_caught = 1; \ - } \ - } \ - __xbt_ex_ctx_ptr->ctx_mctx = __ex_mctx_en; \ - } \ - if ( !(__xbt_ex_ctx()->ctx_caught) \ - || ((e) = XBT_EX_T_CPLUSPLUSCAST __xbt_ex_ctx()->ctx_ex, 0)) { \ - } \ - else - -#define DO_THROW(e) \ - /* deal with the exception */ \ - if (__xbt_ex_ctx()->ctx_mctx == NULL) \ - __xbt_ex_terminate((xbt_ex_t *)&(e)); /* not catched */\ - else \ - __ex_mctx_restore(__xbt_ex_ctx()->ctx_mctx); /* catched somewhere */ \ - abort()/* nope, stupid GCC, we won't survive a THROW (this won't be reached) */ +#define THROW(c, v) { _xbt_throw(NULL, (xbt_errcat_t) c, v, __FILE__, __LINE__, __func__); } -/** @brief Helper macro for THROWS0-6 +/** Builds and throws an exception with a printf-like formatted message + * @ingroup XBT_ex_c * @hideinitializer - * - * @param c: category code (integer) - * @param v: value (integer) - * @param m: message text - * - * If called from within a TRY/CATCH construct, this exception - * is copied into the CATCH relevant variable program control flow - * is derouted to the CATCH (after the optional sg_cleanup). - * - * If no TRY/CATCH construct embeeds this call, the program calls - * abort(3). - * - * The THROW can be performed everywhere, including inside TRY, - * CLEANUP and CATCH blocks. */ +#define THROWF(c, v, ...) _xbt_throw(bprintf(__VA_ARGS__), (xbt_errcat_t) c, v, __FILE__, __LINE__, __func__) -#define _THROW(c,v,m) \ - do { /* change this sequence into one block */ \ - /* build the exception */ \ - __xbt_ex_ctx()->ctx_ex.msg = (m); \ - __xbt_ex_ctx()->ctx_ex.category = (xbt_errcat_t)(c); \ - __xbt_ex_ctx()->ctx_ex.value = (v); \ - __xbt_ex_ctx()->ctx_ex.remote = 0; \ - __xbt_ex_ctx()->ctx_ex.host = (char*)NULL; \ - __xbt_ex_ctx()->ctx_ex.procname = strdup(xbt_procname()); \ - __xbt_ex_ctx()->ctx_ex.file = (char*)__FILE__; \ - __xbt_ex_ctx()->ctx_ex.line = __LINE__; \ - __xbt_ex_ctx()->ctx_ex.func = (char*)_XBT_FUNCTION; \ - __xbt_ex_ctx()->ctx_ex.used = backtrace((void**)__xbt_ex_ctx()->ctx_ex.bt,XBT_BACKTRACE_SIZE);\ - DO_THROW(__xbt_ex_ctx()->ctx_ex);\ - } while (0) - -/** @brief Builds and throws an exception with a string taking no arguments - @hideinitializer */ -#define THROW0(c,v,m) _THROW(c,v,(m?bprintf(m):NULL)) -/** @brief Builds and throws an exception with a string taking one argument - @hideinitializer */ -#define THROW1(c,v,m,a1) _THROW(c,v,bprintf(m,a1)) -/** @brief Builds and throws an exception with a string taking two arguments - @hideinitializer */ -#define THROW2(c,v,m,a1,a2) _THROW(c,v,bprintf(m,a1,a2)) -/** @brief Builds and throws an exception with a string taking three arguments - @hideinitializer */ -#define THROW3(c,v,m,a1,a2,a3) _THROW(c,v,bprintf(m,a1,a2,a3)) -/** @brief Builds and throws an exception with a string taking four arguments - @hideinitializer */ -#define THROW4(c,v,m,a1,a2,a3,a4) _THROW(c,v,bprintf(m,a1,a2,a3,a4)) -/** @brief Builds and throws an exception with a string taking five arguments - @hideinitializer */ -#define THROW5(c,v,m,a1,a2,a3,a4,a5) _THROW(c,v,bprintf(m,a1,a2,a3,a4,a5)) -/** @brief Builds and throws an exception with a string taking six arguments - @hideinitializer */ -#define THROW6(c,v,m,a1,a2,a3,a4,a5,a6) _THROW(c,v,bprintf(m,a1,a2,a3,a4,a5,a6)) - -#define THROW_IMPOSSIBLE THROW0(unknown_error,0,"The Impossible Did Happen (yet again)") -#define THROW_UNIMPLEMENTED THROW1(unknown_error,0,"Function %s unimplemented",__FUNCTION__) - -#ifndef NDEBUG -# define DIE_IMPOSSIBLE xbt_assert0(0,"The Impossible Did Happen (yet again)") -#else -# define DIE_IMPOSSIBLE exit(1); -#endif - -/** @brief re-throwing of an already caught exception (ie, pass it to the upper catch block) - * @hideinitializer +XBT_ATTRIB_NORETURN void xbt_throw_impossible(const char* file, int line, const char* func); +/** Throw an exception because something impossible happened + * @ingroup XBT_ex_c */ -#define RETHROW \ - do { \ - if (__xbt_ex_ctx()->ctx_mctx == NULL) \ - __xbt_ex_terminate((xbt_ex_t *)&(__xbt_ex_ctx()->ctx_ex)); \ - else \ - __ex_mctx_restore(__xbt_ex_ctx()->ctx_mctx); \ - abort();\ - } while(0) - +#define THROW_IMPOSSIBLE xbt_throw_impossible(__FILE__, __LINE__, __func__) -#ifndef DOXYGEN_SKIP -#define _XBT_PRE_RETHROW \ - do { \ - char *_xbt_ex_internal_msg = __xbt_ex_ctx()->ctx_ex.msg; \ - __xbt_ex_ctx()->ctx_ex.msg = bprintf( -#define _XBT_POST_RETHROW \ - _xbt_ex_internal_msg); \ - free(_xbt_ex_internal_msg); \ - RETHROW; \ - } while (0) -#endif - -/** @brief like THROW0, but adding some details to the message of an existing exception - * @hideinitializer - */ -#define RETHROW0(msg) _XBT_PRE_RETHROW msg, _XBT_POST_RETHROW -/** @brief like THROW1, but adding some details to the message of an existing exception - * @hideinitializer - */ -#define RETHROW1(msg,a) _XBT_PRE_RETHROW msg,a, _XBT_POST_RETHROW -/** @brief like THROW2, but adding some details to the message of an existing exception - * @hideinitializer +/** Throw an exception because something unimplemented stuff has been attempted + * @ingroup XBT_ex_c */ -#define RETHROW2(msg,a,b) _XBT_PRE_RETHROW msg,a,b, _XBT_POST_RETHROW -/** @brief like THROW3, but adding some details to the message of an existing exception - * @hideinitializer - */ -#define RETHROW3(msg,a,b,c) _XBT_PRE_RETHROW msg,a,b,c, _XBT_POST_RETHROW -/** @brief like THROW4, but adding some details to the message of an existing exception - * @hideinitializer - */ -#define RETHROW4(msg,a,b,c,d) _XBT_PRE_RETHROW msg,a,b,c, _XBT_POST_RETHROW -/** @brief like THROW5, but adding some details to the message of an existing exception - * @hideinitializer - */ -#define RETHROW5(msg,a,b,c,d,e) _XBT_PRE_RETHROW msg,a,b,c,d,e _XBT_POST_RETHROW +XBT_ATTRIB_NORETURN void xbt_throw_unimplemented(const char* file, int line, const char* func); +#define THROW_UNIMPLEMENTED xbt_throw_unimplemented(__FILE__, __LINE__, __func__) -/** @brief Exception destructor */ -void xbt_ex_free(xbt_ex_t e); +/** Die because something impossible happened + * @ingroup XBT_ex_c + */ +#define DIE_IMPOSSIBLE xbt_die("The Impossible Did Happen (yet again)") -void xbt_ex_display(xbt_ex_t *e); +SG_END_DECL() -/** @} */ -#endif /* __XBT_EX_H__ */ - +/** @} */ +#endif /* __XBT_EX_H__ */