perf tools: Introduce event selectors

Out of ad-hoc code and global arrays with hard coded sizes.

This is the first step on having a library that will be first
used on regression tests in the 'perf test' tool.

[acme@felicio linux]$ size /tmp/perf.before
   text	   data	    bss	    dec	    hex	filename
1273776	  97384	5104416	6475576	 62cf38	/tmp/perf.before
[acme@felicio linux]$ size /tmp/perf.new
   text	   data	    bss	    dec	    hex	filename
1275422	  97416	1392416	2765254	 2a31c6	/tmp/perf.new

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
new file mode 100644
index 000000000000..6539ec912c70
--- /dev/null
+++ b/tools/perf/util/evsel.c
@@ -0,0 +1,35 @@
+#include "evsel.h"
+#include "util.h"
+
+struct perf_evsel *perf_evsel__new(u32 type, u64 config, int idx)
+{
+        struct perf_evsel *evsel = zalloc(sizeof(*evsel));
+
+        if (evsel != NULL) {
+                evsel->idx         = idx;
+                evsel->attr.type   = type;
+                evsel->attr.config = config;
+                INIT_LIST_HEAD(&evsel->node);
+        }
+
+        return evsel;
+}
+
+int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
+{
+        evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
+        return evsel->fd != NULL ? 0 : -ENOMEM;
+}
+
+void perf_evsel__free_fd(struct perf_evsel *evsel)
+{
+        xyarray__delete(evsel->fd);
+        evsel->fd = NULL;
+}
+
+void perf_evsel__delete(struct perf_evsel *evsel)
+{
+        assert(list_empty(&evsel->node));
+        xyarray__delete(evsel->fd);
+        free(evsel);
+}