114 lines
3.1 KiB
C
114 lines
3.1 KiB
C
/* Standard wait macros.
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Copyright (C) 2000-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef GDB_WAIT_H
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#define GDB_WAIT_H
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h> /* POSIX */
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#else
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#ifdef HAVE_WAIT_H
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#include <wait.h> /* legacy */
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#endif
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#endif
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/* Define how to access the int that the wait system call stores.
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This has been compatible in all Unix systems since time immemorial,
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but various well-meaning people have defined various different
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words for the same old bits in the same old int (sometimes claimed
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to be a struct). We just know it's an int and we use these macros
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to access the bits. */
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/* The following macros are defined equivalently to their definitions
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in POSIX.1. We fail to define WNOHANG and WUNTRACED, which POSIX.1
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<sys/wait.h> defines, since our code does not use waitpid() (but
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NOTE exception for GNU/Linux below). We also fail to declare
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wait() and waitpid(). */
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#ifndef WIFEXITED
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#define WIFEXITED(w) (((w)&0377) == 0)
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#endif
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#ifndef WIFSIGNALED
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#define WIFSIGNALED(w) (((w)&0377) != 0177 && ((w)&~0377) == 0)
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#endif
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#ifndef WIFSTOPPED
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#ifdef IBM6000
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/* Unfortunately, the above comment (about being compatible in all Unix
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systems) is not quite correct for AIX, sigh. And AIX 3.2 can generate
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status words like 0x57c (sigtrap received after load), and gdb would
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choke on it. */
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#define WIFSTOPPED(w) ((w)&0x40)
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#else
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#define WIFSTOPPED(w) (((w)&0377) == 0177)
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#endif
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#endif
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#ifndef WEXITSTATUS
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#define WEXITSTATUS(w) (((w) >> 8) & 0377) /* same as WRETCODE */
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#endif
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#ifndef WTERMSIG
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#define WTERMSIG(w) ((w) & 0177)
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#endif
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#ifndef WSTOPSIG
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#define WSTOPSIG WEXITSTATUS
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#endif
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/* These are not defined in POSIX, but are used by our programs. */
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#ifndef WSETEXIT
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# ifdef W_EXITCODE
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#define WSETEXIT(w,status) ((w) = W_EXITCODE(status,0))
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# else
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#define WSETEXIT(w,status) ((w) = (0 | ((status) << 8)))
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# endif
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#endif
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#ifndef W_STOPCODE
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#define W_STOPCODE(sig) ((sig) << 8 | 0x7f)
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#endif
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#ifndef WSETSTOP
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#define WSETSTOP(w,sig) ((w) = W_STOPCODE(sig))
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#endif
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/* For native GNU/Linux we may use waitpid and the __WCLONE option.
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<GRIPE> It is of course dangerous not to use the REAL header file...
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</GRIPE>. */
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/* Bits in the third argument to `waitpid'. */
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#ifndef WNOHANG
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#define WNOHANG 1 /* Don't block waiting. */
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#endif
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#ifndef WUNTRACED
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#define WUNTRACED 2 /* Report status of stopped children. */
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#endif
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#ifndef __WCLONE
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#define __WCLONE 0x80000000 /* Wait for cloned process. */
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#endif
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#endif
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