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Message-Id: <1410358129-9965-14-git-send-email-acme@kernel.org>
Date: Wed, 10 Sep 2014 11:08:48 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Jiri Olsa <jolsa@...hat.com>
Cc: linux-kernel@...r.kernel.org,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Borislav Petkov <bp@...e.de>,
Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Ingo Molnar <mingo@...nel.org>,
Jean Pihet <jean.pihet@...aro.org>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: [PATCH 13/14] tools lib fd array: Allow associating an integer cookie with each entry
From: Arnaldo Carvalho de Melo <acme@...hat.com>
We will use this in perf's evlist class so that it can, at
fdarray__filter() time, to unmap the associated ring buffer.
We may need to have further info associated with each fdarray entry, in
that case we'll make that int array a 'union fdarray_priv' one and put a
pointer there so that users can stash whatever they want there. For now,
an int is enough tho.
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Borislav Petkov <bp@...e.de>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jean Pihet <jean.pihet@...aro.org>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/n/tip-ugusyqex32mc86hqh7cjdy3i@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/lib/api/fd/array.c | 28 ++++++++++++++++++++++++----
tools/lib/api/fd/array.h | 4 +++-
tools/perf/util/evlist.c | 2 +-
3 files changed, 28 insertions(+), 6 deletions(-)
diff --git a/tools/lib/api/fd/array.c b/tools/lib/api/fd/array.c
index bd923d41b450..3f6d1a03d195 100644
--- a/tools/lib/api/fd/array.c
+++ b/tools/lib/api/fd/array.c
@@ -13,21 +13,31 @@
void fdarray__init(struct fdarray *fda, int nr_autogrow)
{
fda->entries = NULL;
+ fda->priv = NULL;
fda->nr = fda->nr_alloc = 0;
fda->nr_autogrow = nr_autogrow;
}
int fdarray__grow(struct fdarray *fda, int nr)
{
+ void *priv;
int nr_alloc = fda->nr_alloc + nr;
+ size_t psize = sizeof(fda->priv[0]) * nr_alloc;
size_t size = sizeof(struct pollfd) * nr_alloc;
struct pollfd *entries = realloc(fda->entries, size);
if (entries == NULL)
return -ENOMEM;
+ priv = realloc(fda->priv, psize);
+ if (priv == NULL) {
+ free(entries);
+ return -ENOMEM;
+ }
+
fda->nr_alloc = nr_alloc;
fda->entries = entries;
+ fda->priv = priv;
return 0;
}
@@ -50,6 +60,7 @@ struct fdarray *fdarray__new(int nr_alloc, int nr_autogrow)
void fdarray__exit(struct fdarray *fda)
{
free(fda->entries);
+ free(fda->priv);
fdarray__init(fda, 0);
}
@@ -61,6 +72,8 @@ void fdarray__delete(struct fdarray *fda)
int fdarray__add(struct fdarray *fda, int fd, short revents)
{
+ int pos = fda->nr;
+
if (fda->nr == fda->nr_alloc &&
fdarray__grow(fda, fda->nr_autogrow) < 0)
return -ENOMEM;
@@ -69,10 +82,11 @@ int fdarray__add(struct fdarray *fda, int fd, short revents)
fda->entries[fda->nr].fd = fd;
fda->entries[fda->nr].events = revents;
fda->nr++;
- return 0;
+ return pos;
}
-int fdarray__filter(struct fdarray *fda, short revents)
+int fdarray__filter(struct fdarray *fda, short revents,
+ void (*entry_destructor)(struct fdarray *fda, int fd))
{
int fd, nr = 0;
@@ -80,11 +94,17 @@ int fdarray__filter(struct fdarray *fda, short revents)
return 0;
for (fd = 0; fd < fda->nr; ++fd) {
- if (fda->entries[fd].revents & revents)
+ if (fda->entries[fd].revents & revents) {
+ if (entry_destructor)
+ entry_destructor(fda, fd);
+
continue;
+ }
- if (fd != nr)
+ if (fd != nr) {
fda->entries[nr] = fda->entries[fd];
+ fda->priv[nr] = fda->priv[fd];
+ }
++nr;
}
diff --git a/tools/lib/api/fd/array.h b/tools/lib/api/fd/array.h
index de38361ba69e..7b2870a96898 100644
--- a/tools/lib/api/fd/array.h
+++ b/tools/lib/api/fd/array.h
@@ -10,6 +10,7 @@ struct fdarray {
int nr_alloc;
int nr_autogrow;
struct pollfd *entries;
+ int *priv;
};
void fdarray__init(struct fdarray *fda, int nr_autogrow);
@@ -20,7 +21,8 @@ void fdarray__delete(struct fdarray *fda);
int fdarray__add(struct fdarray *fda, int fd, short revents);
int fdarray__poll(struct fdarray *fda, int timeout);
-int fdarray__filter(struct fdarray *fda, short revents);
+int fdarray__filter(struct fdarray *fda, short revents,
+ void (*entry_destructor)(struct fdarray *fda, int fd));
int fdarray__grow(struct fdarray *fda, int extra);
int fdarray__fprintf(struct fdarray *fda, FILE *fp);
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 662057a44126..6d2499cfd789 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -431,7 +431,7 @@ int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd)
int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask)
{
- return fdarray__filter(&evlist->pollfd, revents_and_mask);
+ return fdarray__filter(&evlist->pollfd, revents_and_mask, NULL);
}
int perf_evlist__poll(struct perf_evlist *evlist, int timeout)
--
1.9.3
--
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