95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
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/* The ptid_t type and common functions operating on it.
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Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
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1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
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2009, 2010, 2011 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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#include "ptid.h"
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/* Oft used ptids */
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ptid_t null_ptid = { 0, 0, 0 };
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ptid_t minus_one_ptid = { -1, 0, 0 };
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/* Create a ptid given the necessary PID, LWP, and TID components. */
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ptid_t
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ptid_build (int pid, long lwp, long tid)
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{
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ptid_t ptid;
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ptid.pid = pid;
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ptid.lwp = lwp;
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ptid.tid = tid;
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return ptid;
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}
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/* Create a ptid from just a pid. */
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ptid_t
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pid_to_ptid (int pid)
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{
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return ptid_build (pid, 0, 0);
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}
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/* Fetch the pid (process id) component from a ptid. */
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int
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ptid_get_pid (ptid_t ptid)
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{
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return ptid.pid;
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}
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/* Fetch the lwp (lightweight process) component from a ptid. */
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long
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ptid_get_lwp (ptid_t ptid)
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{
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return ptid.lwp;
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}
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/* Fetch the tid (thread id) component from a ptid. */
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long
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ptid_get_tid (ptid_t ptid)
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{
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return ptid.tid;
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}
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/* ptid_equal() is used to test equality of two ptids. */
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int
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ptid_equal (ptid_t ptid1, ptid_t ptid2)
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{
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return (ptid1.pid == ptid2.pid
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&& ptid1.lwp == ptid2.lwp
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&& ptid1.tid == ptid2.tid);
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}
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/* Returns true if PTID represents a process. */
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int
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ptid_is_pid (ptid_t ptid)
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{
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if (ptid_equal (minus_one_ptid, ptid))
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return 0;
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if (ptid_equal (null_ptid, ptid))
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return 0;
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return (ptid_get_lwp (ptid) == 0 && ptid_get_tid (ptid) == 0);
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}
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