Commit 250611cf authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf ui browser: Add filter method 

Its becoming common to allow the user to filter out parts of the data
structure being browsed, like already done in the hists browser and in
the annotate browser in the next commit, so provide it directly in the
ui_browser class list_head helpers.

More work required to move the equivalent routines found now in the
hists browser to the rb_tree helpers.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-jk7danyt1d9ji4e3o2xuthpn@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 7296d66a

tools/perf/util/ui/browser.c

+42 −9
Original line number Diff line number Diff line
@@ -42,31 +42,62 @@ void ui_browser__gotorc(struct ui_browser *self, int y, int x) 
	SLsmg_gotorc(self->y + y, self->x + x);

}



static struct list_head *

ui_browser__list_head_filter_entries(struct ui_browser *browser,

				     struct list_head *pos)

{

	do {

		if (!browser->filter || !browser->filter(browser, pos))

			return pos;

		pos = pos->next;

	} while (pos != browser->entries);



	return NULL;

}



static struct list_head *

ui_browser__list_head_filter_prev_entries(struct ui_browser *browser,

					  struct list_head *pos)

{

	do {

		if (!browser->filter || !browser->filter(browser, pos))

			return pos;

		pos = pos->prev;

	} while (pos != browser->entries);



	return NULL;

}



void ui_browser__list_head_seek(struct ui_browser *self, off_t offset, int whence)

{

	struct list_head *head = self->entries;

	struct list_head *pos;



	if (self->nr_entries == 0)

		return;



	switch (whence) {

	case SEEK_SET:

		pos = head->next;

		pos = ui_browser__list_head_filter_entries(self, head->next);

		break;

	case SEEK_CUR:

		pos = self->top;

		break;

	case SEEK_END:

		pos = head->prev;

		pos = ui_browser__list_head_filter_prev_entries(self, head->prev);

		break;

	default:

		return;

	}



	assert(pos != NULL);



	if (offset > 0) {

		while (offset-- != 0)

			pos = pos->next;

			pos = ui_browser__list_head_filter_entries(self, pos->next);

	} else {

		while (offset++ != 0)

			pos = pos->prev;

			pos = ui_browser__list_head_filter_prev_entries(self, pos->prev);

	}



	self->top = pos;
@@ -365,16 +396,18 @@ unsigned int ui_browser__list_head_refresh(struct ui_browser *self) 
	int row = 0;



	if (self->top == NULL || self->top == self->entries)

                self->top = head->next;

                self->top = ui_browser__list_head_filter_entries(self, head->next);



	pos = self->top;



	list_for_each_from(pos, head) {

		if (!self->filter || !self->filter(self, pos)) {

			ui_browser__gotorc(self, row, 0);

			self->write(self, pos, row);

			if (++row == self->height)

				break;

		}

	}



	return row;

}

tools/perf/util/ui/browser.h

+1 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ struct ui_browser { 
	unsigned int  (*refresh)(struct ui_browser *self);

	void	      (*write)(struct ui_browser *self, void *entry, int row);

	void	      (*seek)(struct ui_browser *self, off_t offset, int whence);

	bool	      (*filter)(struct ui_browser *self, void *entry);

	u32	      nr_entries;

};

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