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 122