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top: implement a new approach to forest view mode

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The TREE_RESCANS #define (formerly TREE_ONEPASS) has
been eliminated and the approach to forest view mode
redesigned.  The chance of dangling children has been
eliminated and overhead reduced.

We now order processes on start_time (non-display)
and are therefore immune to any pid, ppid or tgid
anomalies when pid values wrap.

The new algorithm also accommodates any distortions
caused by the 3.3 kernel 'hidepid' provisions --
something guaranteed to produce dangling children
under the former approach.

Related References:
commit a2086dfdf6
commit cd608f462e
commit 41ed28aa5d

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner
2012-08-25 23:59:59 -05:00
committed by Craig Small
parent d9890fb5ac
commit beb0982b28
2 changed files with 28 additions and 24 deletions
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top/top.h
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@ -43,7 +43,6 @@
//#define STRINGCASENO /* case insenstive compare/locate versions */
//#define TERMIO_PROXY /* true line editing, beyond native input */
//#define TREE_NORESET /* sort keys do NOT force forest view OFF */
//#define TREE_RESCANS /* restart scan to avoid dangling children */
//#define USE_X_COLHDR /* emphasize header vs. whole col, for 'x' */
//#define VALIDATE_NLS /* validate integrity of all 3 nls tables */
//#define WARN_CFG_OFF /* warning OFF when overwriting old rcfile */
@ -650,7 +649,8 @@ typedef struct WIN_t {
//atic void keys_window (int ch);
//atic void keys_xtra (int ch);
/*------ Forest View support -------------------------------------------*/
//atic void forest_add (const int self, const int level);
//atic void forest_adds (const int self, const int level);
//atic int forest_based (const proc_t **x, const proc_t **y);
//atic void forest_create (WIN_t *q);
//atic inline const char *forest_display (const WIN_t *q, const proc_t *p);
/*------ Main Screen routines ------------------------------------------*/