kc3-lang/libevent/log-internal.h

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• Hash : 33bbbed9
  Author :
  Date : 2010-05-13T10:57:30
  

  Mark the event_err() functions as __attribute__((noreturn))
  
  This attribute tells gcc (and anything else that understands gcc
  attributes) that the functions will never return control, and helps
  the optimizer a little.  With luck, it will also tell
  less-than-full-program dataflow analysis tools that they don't need to
  worry about any code path that involves calling one of these functions
  and then returning.
  
  This patch also forces event_exit() to always exit, no matter what the
  user-supplied fatal_callback does.  This means that the old unit tests
  for the event_err* functions don't work any more, since they assume it
  is safe to call event_err* if you've given it a bogus fatal_callback
  that doesn't exit.  Instead, we have to make the unit tests fork
  before calling event_err(), and have the main unit test process wait
  for the event_err() test to exit with a sane exit code.  On unix,
  that's trivial.  On windows, let's not bother and just assume that
  event_err* works.
  

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• log-internal.h

• /*
   * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
   * Copyright (c) 2007-2010 Niels Provos and Nick Mathewson
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 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 AUTHOR 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.
   */
  #ifndef _LOG_H_
  #define _LOG_H_
  
  #include <event2/util.h>
  
  #ifdef __GNUC__
  #define EV_CHECK_FMT(a,b) __attribute__((format(printf, a, b)))
  #define EV_NORETURN __attribute__((noreturn))
  #else
  #define EV_CHECK_FMT(a,b)
  #define EV_NORETURN
  #endif
  
  #define _EVENT_ERR_ABORT 0xdeaddead
  
  void event_err(int eval, const char *fmt, ...) EV_CHECK_FMT(2,3) EV_NORETURN;
  void event_warn(const char *fmt, ...) EV_CHECK_FMT(1,2);
  void event_sock_err(int eval, evutil_socket_t sock, const char *fmt, ...) EV_CHECK_FMT(3,4) EV_NORETURN;
  void event_sock_warn(evutil_socket_t sock, const char *fmt, ...) EV_CHECK_FMT(2,3);
  void event_errx(int eval, const char *fmt, ...) EV_CHECK_FMT(2,3) EV_NORETURN;
  void event_warnx(const char *fmt, ...) EV_CHECK_FMT(1,2);
  void event_msgx(const char *fmt, ...) EV_CHECK_FMT(1,2);
  void _event_debugx(const char *fmt, ...) EV_CHECK_FMT(1,2);
  
  #ifdef USE_DEBUG
  #define event_debug(x) _event_debugx x
  #else
  #define event_debug(x) do {;} while (0)
  #endif
  
  #undef EV_CHECK_FMT
  
  #endif
  

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