arch/all-unix/exec/disable.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: i386unix version of Disable()
   6     Lang: english
   7 */
   8
   9 #include <exec/tasks.h>
  10 #include <exec/execbase.h>
  11 #include <aros/libcall.h>
  12 #include <aros/atomic.h>
  13 #include <proto/exec.h>
  14
  15 #include <stdlib.h>
  16 #include <signal.h>
  17
  18 extern sigset_t sig_int_mask;   /* Mask of sig_t that are ints, not traps */
  19 #undef  Exec
  20 #ifdef UseExecstubs
  21 #    define Exec _Exec
  22 #endif
  23
  24 AROS_LH0(void, Disable,
  25     struct ExecBase *, SysBase, 20, Exec)
  26 {
  27 #undef Exec
  28     AROS_LIBFUNC_INIT
  29
  30     sigprocmask(SIG_BLOCK, &sig_int_mask, NULL);
  31
  32     AROS_ATOMIC_INC(SysBase->IDNestCnt);
  33
  34     if (SysBase->IDNestCnt < 0)
  35     {
  36         /* If we get here we have big trouble. Someone called
  37            1x Disable() and 2x Enable(). IDNestCnt < 0 would
  38            mean enable interrupts, but the caller of Disable
  39            relies on the function to disable them, so we don´t
  40            do anything here (or maybe a deadend alert?) */
  41     }
  42
  43     AROS_LIBFUNC_EXIT
  44 }