提交 ce8ccff5 编写于 作者: A Arnaldo Carvalho de Melo

perf evsel: Subclassing

Provide a method to be called at tool start to config the perf_evsel
instance size, together with optional constructor and destructor.

This will be used so that perf_evsel doesn't always include a struct
hists, tools that works with hists/hist_entries, like report, top and
annotate, will, at start, tell the evsel class the size they need per
instance.

v2: Don't use exit as a name of a member of function parameter, as this
    breaks the build on at least fedora14 and rhel6.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
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-7t8cay0ieryox4gqosie85ek@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
上级 2a1731fb
......@@ -32,6 +32,48 @@ static struct {
bool cloexec;
} perf_missing_features;
static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused)
{
return 0;
}
static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused)
{
}
static struct {
size_t size;
int (*init)(struct perf_evsel *evsel);
void (*fini)(struct perf_evsel *evsel);
} perf_evsel__object = {
.size = sizeof(struct perf_evsel),
.init = perf_evsel__no_extra_init,
.fini = perf_evsel__no_extra_fini,
};
int perf_evsel__object_config(size_t object_size,
int (*init)(struct perf_evsel *evsel),
void (*fini)(struct perf_evsel *evsel))
{
if (object_size == 0)
goto set_methods;
if (perf_evsel__object.size > object_size)
return -EINVAL;
perf_evsel__object.size = object_size;
set_methods:
if (init != NULL)
perf_evsel__object.init = init;
if (fini != NULL)
perf_evsel__object.fini = fini;
return 0;
}
#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
int __perf_evsel__sample_size(u64 sample_type)
......@@ -169,13 +211,14 @@ void perf_evsel__init(struct perf_evsel *evsel,
evsel->scale = 1.0;
INIT_LIST_HEAD(&evsel->node);
hists__init(&evsel->hists);
perf_evsel__object.init(evsel);
evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
perf_evsel__calc_id_pos(evsel);
}
struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
{
struct perf_evsel *evsel = zalloc(sizeof(*evsel));
struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
if (evsel != NULL)
perf_evsel__init(evsel, attr, idx);
......@@ -185,7 +228,7 @@ struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
{
struct perf_evsel *evsel = zalloc(sizeof(*evsel));
struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
if (evsel != NULL) {
struct perf_event_attr attr = {
......@@ -817,6 +860,7 @@ void perf_evsel__exit(struct perf_evsel *evsel)
assert(list_empty(&evsel->node));
perf_evsel__free_fd(evsel);
perf_evsel__free_id(evsel);
perf_evsel__object.fini(evsel);
}
void perf_evsel__delete(struct perf_evsel *evsel)
......
......@@ -112,6 +112,10 @@ struct thread_map;
struct perf_evlist;
struct record_opts;
int perf_evsel__object_config(size_t object_size,
int (*init)(struct perf_evsel *evsel),
void (*fini)(struct perf_evsel *evsel));
struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx);
static inline struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr)
......
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