forked from Imagelibrary/binutils-gdb
c658158d93
It's best that we standardize on process_stratum targets using the ptid.lwp field to store thread ids. The idea being leave the ptid.tid field free for any thread_stratum target that might want to sit on top. This patch adds a comment in that direction to struct ptid's definition. gdb/ 2014-02-19 Pedro Alves <palves@redhat.com> * common/ptid.h (struct ptid): Mention that process_stratum targets should prefer ptid.lwp.
87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/* The ptid_t type and common functions operating on it.
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Copyright (C) 1986-2014 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 PTID_H
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#define PTID_H
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/* The ptid struct is a collection of the various "ids" necessary for
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identifying the inferior process/thread being debugged. This
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consists of the process id (pid), lightweight process id (lwp) and
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thread id (tid). When manipulating ptids, the constructors,
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accessors, and predicates declared in this file should be used. Do
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NOT access the struct ptid members directly.
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process_stratum targets that handle threading themselves should
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prefer using the ptid.lwp field, leaving the ptid.tid field for any
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thread_stratum target that might want to sit on top.
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*/
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struct ptid
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{
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/* Process id. */
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int pid;
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/* Lightweight process id. */
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long lwp;
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/* Thread id. */
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long tid;
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};
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typedef struct ptid ptid_t;
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/* The null or zero ptid, often used to indicate no process. */
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extern ptid_t null_ptid;
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/* The (-1,0,0) ptid, often used to indicate either an error condition
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or a "don't care" condition, i.e, "run all threads." */
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extern ptid_t minus_one_ptid;
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/* Make a ptid given the necessary PID, LWP, and TID components. */
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ptid_t ptid_build (int pid, long lwp, long tid);
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/* Make a new ptid from just a pid. This ptid is usually used to
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represent a whole process, including all its lwps/threads. */
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ptid_t pid_to_ptid (int pid);
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/* Fetch the pid (process id) component from a ptid. */
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int ptid_get_pid (ptid_t ptid);
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/* Fetch the lwp (lightweight process) component from a ptid. */
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long ptid_get_lwp (ptid_t ptid);
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/* Fetch the tid (thread id) component from a ptid. */
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long ptid_get_tid (ptid_t ptid);
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/* Compare two ptids to see if they are equal. */
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int ptid_equal (ptid_t ptid1, ptid_t ptid2);
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/* Returns true if PTID represents a whole process, including all its
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lwps/threads. Such ptids have the form of (pid,0,0), with pid !=
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-1. */
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int ptid_is_pid (ptid_t ptid);
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/* Return true if PTID's lwp member is non-zero. */
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int ptid_lwp_p (ptid_t ptid);
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/* Return true if PTID's tid member is non-zero. */
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int ptid_tid_p (ptid_t ptid);
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#endif
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