1 /* Standard wait macros. 2 Copyright (C) 2000-2013 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 3 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, see <http://www.gnu.org/licenses/>. */ 18 19 #ifndef GDB_WAIT_H 20 #define GDB_WAIT_H 21 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 29 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. */ 36 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(). */ 42 43 #ifndef WIFEXITED 44 #define WIFEXITED(w) (((w)&0377) == 0) 45 #endif 46 47 #ifndef WIFSIGNALED 48 #define WIFSIGNALED(w) (((w)&0377) != 0177 && ((w)&~0377) == 0) 49 #endif 50 51 #ifndef WIFSTOPPED 52 #ifdef IBM6000 53 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. */ 58 59 #define WIFSTOPPED(w) ((w)&0x40) 60 61 #else 62 #define WIFSTOPPED(w) (((w)&0377) == 0177) 63 #endif 64 #endif 65 66 #ifndef WEXITSTATUS 67 #define WEXITSTATUS(w) (((w) >> 8) & 0377) /* same as WRETCODE */ 68 #endif 69 70 #ifndef WTERMSIG 71 #define WTERMSIG(w) ((w) & 0177) 72 #endif 73 74 #ifndef WSTOPSIG 75 #define WSTOPSIG WEXITSTATUS 76 #endif 77 78 /* These are not defined in POSIX, but are used by our programs. */ 79 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 87 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 95 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>. */ 99 100 /* Bits in the third argument to `waitpid'. */ 101 #ifndef WNOHANG 102 #define WNOHANG 1 /* Don't block waiting. */ 103 #endif 104 105 #ifndef WUNTRACED 106 #define WUNTRACED 2 /* Report status of stopped children. */ 107 #endif 108 109 #ifndef __WCLONE 110 #define __WCLONE 0x80000000 /* Wait for cloned process. */ 111 #endif 112 113 #endif 114