gdb/common/gdb_wait.h - gdb

Macros defined

Source code

  1. /* Standard wait macros.
  2.    Copyright (C) 2000-2015 Free Software Foundation, Inc.

  4.    This file is part of GDB.

  6.    This program is free software; you can redistribute it and/or modify
  7.    it under the terms of the GNU General Public License as published by
  8.    the Free Software Foundation; either version 3 of the License, or
  9.    (at your option) any later version.

  11.    This program is distributed in the hope that it will be useful,
  12.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14.    GNU General Public License for more details.

  16.    You should have received a copy of the GNU General Public License
  17.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  19. #ifndef GDB_WAIT_H
  20. ‌#define GDB_WAIT_H

  22. #ifdef HAVE_SYS_WAIT_H
  23. #include <sys/wait.h> /* POSIX */
  24. #else
  25. #ifdef HAVE_WAIT_H
  26. #include <wait.h> /* legacy */
  27. #endif
  28. #endif

  30. /* Define how to access the int that the wait system call stores.
  31.    This has been compatible in all Unix systems since time immemorial,
  32.    but various well-meaning people have defined various different
  33.    words for the same old bits in the same old int (sometimes claimed
  34.    to be a struct).  We just know it's an int and we use these macros
  35.    to access the bits.  */

  37. /* The following macros are defined equivalently to their definitions
  38.    in POSIX.1.  We fail to define WNOHANG and WUNTRACED, which POSIX.1
  39.    <sys/wait.h> defines, since our code does not use waitpid() (but
  40.    NOTE exception for GNU/Linux below).  We also fail to declare
  41.    wait() and waitpid().  */

  43. #ifndef        WIFEXITED
  44. ‌#define WIFEXITED(w)        (((w)&0377) == 0)
  45. #endif

  47. #ifndef        WIFSIGNALED
  48. ‌#define WIFSIGNALED(w)        (((w)&0377) != 0177 && ((w)&~0377) == 0)
  49. #endif

  51. #ifndef        WIFSTOPPED
  52. #ifdef IBM6000

  54. /* Unfortunately, the above comment (about being compatible in all Unix
  55.    systems) is not quite correct for AIX, sigh.  And AIX 3.2 can generate
  56.    status words like 0x57c (sigtrap received after load), and gdb would
  57.    choke on it.  */

  59. ‌#define WIFSTOPPED(w)        ((w)&0x40)

  61. #else
  62. ‌#define WIFSTOPPED(w)        (((w)&0377) == 0177)
  63. #endif
  64. #endif

  66. #ifndef        WEXITSTATUS
  67. ‌#define WEXITSTATUS(w)        (((w) >> 8) & 0377) /* same as WRETCODE */
  68. #endif

  70. #ifndef        WTERMSIG
  71. ‌#define WTERMSIG(w)        ((w) & 0177)
  72. #endif

  74. #ifndef        WSTOPSIG
  75. ‌#define WSTOPSIG        WEXITSTATUS
  76. #endif

  78. /* These are not defined in POSIX, but are used by our programs.  */

  80. #ifndef        WSETEXIT
  81. # ifdef        W_EXITCODE
  82. ‌#define        WSETEXIT(w,status) ((w) = W_EXITCODE(status,0))
  83. # else
  84. ‌#define WSETEXIT(w,status) ((w) = (0 | ((status) << 8)))
  85. # endif
  86. #endif

  88. #ifndef        WSETSTOP
  89. # ifdef        W_STOPCODE
  90. ‌#define        WSETSTOP(w,sig)    ((w) = W_STOPCODE(sig))
  91. # else
  92. ‌#define WSETSTOP(w,sig)           ((w) = (0177 | ((sig) << 8)))
  93. # endif
  94. #endif

  96. /* For native GNU/Linux we may use waitpid and the __WCLONE option.
  97.   <GRIPE> It is of course dangerous not to use the REAL header file...
  98.   </GRIPE>.  */

  100. /* Bits in the third argument to `waitpid'.  */
  101. #ifndef WNOHANG
  102. ‌#define        WNOHANG                1        /* Don't block waiting.  */
  103. #endif

  105. #ifndef WUNTRACED
  106. ‌#define        WUNTRACED        2        /* Report status of stopped children.  */
  107. #endif

  109. #ifndef __WCLONE
  110. ‌#define __WCLONE        0x80000000 /* Wait for cloned process.  */
  111. #endif

  113. #endif