| 1 | /* Standard wait macros. |
| 2 | Copyright 2000 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 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 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 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. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #ifndef GDB_WAIT_H |
| 22 | #define GDB_WAIT_H |
| 23 | |
| 24 | #ifdef HAVE_SYS_WAIT_H |
| 25 | #include <sys/wait.h> /* POSIX */ |
| 26 | #else |
| 27 | #ifdef HAVE_WAIT_H |
| 28 | #include <wait.h> /* legacy */ |
| 29 | #endif |
| 30 | #endif |
| 31 | |
| 32 | /* Define how to access the int that the wait system call stores. |
| 33 | This has been compatible in all Unix systems since time immemorial, |
| 34 | but various well-meaning people have defined various different |
| 35 | words for the same old bits in the same old int (sometimes claimed |
| 36 | to be a struct). We just know it's an int and we use these macros |
| 37 | to access the bits. */ |
| 38 | |
| 39 | /* The following macros are defined equivalently to their definitions |
| 40 | in POSIX.1. We fail to define WNOHANG and WUNTRACED, which POSIX.1 |
| 41 | <sys/wait.h> defines, since our code does not use waitpid() (but |
| 42 | NOTE exception for GNU/Linux below). We also fail to declare |
| 43 | wait() and waitpid(). */ |
| 44 | |
| 45 | #ifndef WIFEXITED |
| 46 | #define WIFEXITED(w) (((w)&0377) == 0) |
| 47 | #endif |
| 48 | |
| 49 | #ifndef WIFSIGNALED |
| 50 | #define WIFSIGNALED(w) (((w)&0377) != 0177 && ((w)&~0377) == 0) |
| 51 | #endif |
| 52 | |
| 53 | #ifndef WIFSTOPPED |
| 54 | #ifdef IBM6000 |
| 55 | |
| 56 | /* Unfortunately, the above comment (about being compatible in all Unix |
| 57 | systems) is not quite correct for AIX, sigh. And AIX 3.2 can generate |
| 58 | status words like 0x57c (sigtrap received after load), and gdb would |
| 59 | choke on it. */ |
| 60 | |
| 61 | #define WIFSTOPPED(w) ((w)&0x40) |
| 62 | |
| 63 | #else |
| 64 | #define WIFSTOPPED(w) (((w)&0377) == 0177) |
| 65 | #endif |
| 66 | #endif |
| 67 | |
| 68 | #ifndef WEXITSTATUS |
| 69 | #define WEXITSTATUS(w) (((w) >> 8) & 0377) /* same as WRETCODE */ |
| 70 | #endif |
| 71 | |
| 72 | #ifndef WTERMSIG |
| 73 | #define WTERMSIG(w) ((w) & 0177) |
| 74 | #endif |
| 75 | |
| 76 | #ifndef WSTOPSIG |
| 77 | #define WSTOPSIG WEXITSTATUS |
| 78 | #endif |
| 79 | |
| 80 | /* These are not defined in POSIX, but are used by our programs. */ |
| 81 | |
| 82 | #define WAITTYPE int |
| 83 | |
| 84 | #ifndef WCOREDUMP |
| 85 | #define WCOREDUMP(w) (((w)&0200) != 0) |
| 86 | #endif |
| 87 | |
| 88 | #ifndef WSETEXIT |
| 89 | # ifdef W_EXITCODE |
| 90 | #define WSETEXIT(w,status) ((w) = W_EXITCODE(status,0)) |
| 91 | # else |
| 92 | #define WSETEXIT(w,status) ((w) = (0 | ((status) << 8))) |
| 93 | # endif |
| 94 | #endif |
| 95 | |
| 96 | #ifndef WSETSTOP |
| 97 | # ifdef W_STOPCODE |
| 98 | #define WSETSTOP(w,sig) ((w) = W_STOPCODE(sig)) |
| 99 | # else |
| 100 | #define WSETSTOP(w,sig) ((w) = (0177 | ((sig) << 8))) |
| 101 | # endif |
| 102 | #endif |
| 103 | |
| 104 | /* For native GNU/Linux we may use waitpid and the __WCLONE option. |
| 105 | <GRIPE> It is of course dangerous not to use the REAL header file... |
| 106 | </GRIPE>. */ |
| 107 | |
| 108 | /* Bits in the third argument to `waitpid'. */ |
| 109 | #ifndef WNOHANG |
| 110 | #define WNOHANG 1 /* Don't block waiting. */ |
| 111 | #endif |
| 112 | |
| 113 | #ifndef WUNTRACED |
| 114 | #define WUNTRACED 2 /* Report status of stopped children. */ |
| 115 | #endif |
| 116 | |
| 117 | #ifndef __WCLONE |
| 118 | #define __WCLONE 0x80000000 /* Wait for cloned process. */ |
| 119 | #endif |
| 120 | |
| 121 | #endif |