src/util/pthread_nosigs.h

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 #ifndef AFS_PTHREAD_NOSIGS_H
  11 #define AFS_PTHREAD_NOSIGS_H
  12
  13 /* We want servers to only handle signals in the main thread. To do this
  14  * we must block signals in the child threads. To do this, wrap pthread_create
  15  * with these macros.
  16  */
  17
  18 #ifdef AFS_NT40_ENV
  19 /* Compilers complain about empty declaration unless at end of decl's */
  20 #define AFS_SIGSET_DECL int i_junk=0
  21 #define AFS_SIGSET_CLEAR() ++i_junk
  22 #define AFS_SIGSET_RESTORE() --i_junk
  23 #else
  24 #define AFS_SIGSET_DECL sigset_t i_tset, i_oset
  25 #ifdef AFS_AIX42_ENV
  26 #define AFS_SET_SIGMASK sigthreadmask
  27 #else
  28 #define AFS_SET_SIGMASK pthread_sigmask
  29 #endif
  30 #ifdef SIGSEGV
  31 #define _SETSEGV sigdelset(&i_tset, SIGSEGV);
  32 #else
  33 #define _SETSEGV ;
  34 #endif
  35 #ifdef SIGBUS
  36 #define _SETBUS sigdelset(&i_tset, SIGBUS);
  37 #else
  38 #define _SETBUS ;
  39 #endif
  40 #ifdef SIGILL
  41 #define _SETILL sigdelset(&i_tset, SIGILL);
  42 #else
  43 #define _SETILL ;
  44 #endif
  45 #ifdef SIGTRAP
  46 #define _SETTRAP sigdelset(&i_tset, SIGTRAP);
  47 #else
  48 #define _SETTRAP ;
  49 #endif
  50 #ifdef SIGABRT
  51 #define _SETABRT sigdelset(&i_tset, SIGABRT);
  52 #else
  53 #define _SETABRT ;
  54 #endif
  55 #ifdef SIGFPE
  56 #define _SETFPE sigdelset(&i_tset, SIGFPE);
  57 #else
  58 #define _SETFPE ;
  59 #endif
  60 #define AFS_SIGSET_CLEAR() \
  61 do { \
  62          int b; \
  63          sigfillset(&i_tset); \
  64          _SETSEGV \
  65          _SETBUS \
  66          _SETILL \
  67          _SETTRAP \
  68          _SETABRT \
  69          _SETFPE \
  70          b = (AFS_SET_SIGMASK(SIG_BLOCK, &i_tset, &i_oset) == 0); \
  71          opr_Assert(b); \
  72 } while (0)
  73
  74 #define AFS_SIGSET_RESTORE() \
  75 do { \
  76          int b = (AFS_SET_SIGMASK(SIG_SETMASK, &i_oset, NULL) == 0); \
  77          opr_Assert(b); \
  78 } while (0)
  79 #endif /* AFS_NT40_ENV */
  80
  81 #endif /* AFS_PTHREAD_NOSIGS_H */