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/* The ptid_t type and common functions operating on it.
Copyright (C) 1986-2013 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "ptid.h"
/* Oft used ptids */
ptid_t null_ptid = { 0, 0, 0 };
ptid_t minus_one_ptid = { -1, 0, 0 };
/* Create a ptid given the necessary PID, LWP, and TID components. */
ptid_t
ptid_build (int pid, long lwp, long tid)
{
ptid_t ptid;
ptid.pid = pid;
ptid.lwp = lwp;
ptid.tid = tid;
return ptid;
}
/* Create a ptid from just a pid. */
ptid_t
pid_to_ptid (int pid)
{
return ptid_build (pid, 0, 0);
}
/* Fetch the pid (process id) component from a ptid. */
int
ptid_get_pid (ptid_t ptid)
{
return ptid.pid;
}
/* Fetch the lwp (lightweight process) component from a ptid. */
long
ptid_get_lwp (ptid_t ptid)
{
return ptid.lwp;
}
/* Fetch the tid (thread id) component from a ptid. */
long
ptid_get_tid (ptid_t ptid)
{
return ptid.tid;
}
/* ptid_equal() is used to test equality of two ptids. */
int
ptid_equal (ptid_t ptid1, ptid_t ptid2)
{
return (ptid1.pid == ptid2.pid
&& ptid1.lwp == ptid2.lwp
&& ptid1.tid == ptid2.tid);
}
/* Returns true if PTID represents a process. */
int
ptid_is_pid (ptid_t ptid)
{
if (ptid_equal (minus_one_ptid, ptid))
return 0;
if (ptid_equal (null_ptid, ptid))
return 0;
return (ptid_get_lwp (ptid) == 0 && ptid_get_tid (ptid) == 0);
}
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