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common/ptid.h: Mention that process_stratum targets should prefer ptid.lwp. 

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.
This commit is contained in:
Pedro Alves 2014-02-19 18:25:41 +00:00
parent ba3481708d
commit c658158d93
2 changed files with 11 additions and 1 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2014-02-19 Pedro Alves <palves@redhat.com>
* common/ptid.h (struct ptid): Mention that process_stratum
targets should prefer ptid.lwp.
2014-02-19 Pedro Alves <palves@redhat.com>
* remote.c (remote_thread_alive, write_ptid, read_ptid)

7
gdb/common/ptid.h
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@ -25,7 +25,12 @@
consists of the process id (pid), lightweight process id (lwp) and
thread id (tid). When manipulating ptids, the constructors,
accessors, and predicates declared in this file should be used. Do
NOT access the struct ptid members directly. */
NOT access the struct ptid members directly.
process_stratum targets that handle threading themselves should
prefer using the ptid.lwp field, leaving the ptid.tid field for any
thread_stratum target that might want to sit on top.
*/
struct ptid
{