libperf: Adopt xyarray class from perf

Move the xyarray class from perf to libperf, because it's going to be
used in both.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-58-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-top.c

@@ -38,7 +38,6 @@
 #include <subcmd/parse-options.h>
 #include "util/parse-events.h"
 #include "util/cpumap.h"
-#include "util/xyarray.h"
 #include "util/sort.h"
 #include "util/string2.h"
 #include "util/term.h"

tools/perf/lib/Build

@@ -4,6 +4,7 @@ libperf-y += threadmap.o
 libperf-y += evsel.o
 libperf-y += evlist.o
 libperf-y += zalloc.o
+libperf-y += xyarray.o
 
 $(OUTPUT)zalloc.o: ../../lib/zalloc.c FORCE
 	$(call rule_mkdir)

tools/perf/lib/include/internal/xyarray.h

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _PERF_XYARRAY_H_
+#ifndef __LIBPERF_INTERNAL_XYARRAY_H
-#define _PERF_XYARRAY_H_ 1
+#define __LIBPERF_INTERNAL_XYARRAY_H
 
 #include <sys/types.h>
 
@@ -32,4 +32,4 @@ static inline int xyarray__max_x(struct xyarray *xy)
 	return xy->max_x;
 }
 
-#endif /* _PERF_XYARRAY_H_ */
+#endif /* __LIBPERF_INTERNAL_XYARRAY_H */

tools/perf/lib/xyarray.c

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <internal/xyarray.h>
+#include <linux/zalloc.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct xyarray *xyarray__new(int xlen, int ylen, size_t entry_size)
+{
+	size_t row_size = ylen * entry_size;
+	struct xyarray *xy = zalloc(sizeof(*xy) + xlen * row_size);
+
+	if (xy != NULL) {
+		xy->entry_size = entry_size;
+		xy->row_size   = row_size;
+		xy->entries    = xlen * ylen;
+		xy->max_x      = xlen;
+		xy->max_y      = ylen;
+	}
+
+	return xy;
+}
+
+void xyarray__reset(struct xyarray *xy)
+{
+	size_t n = xy->entries * xy->entry_size;
+
+	memset(xy->contents, 0, n);
+}
+
+void xyarray__delete(struct xyarray *xy)
+{
+	free(xy);
+}

tools/perf/util/Build

@@ -69,7 +69,6 @@ perf-y += svghelper.o
 perf-y += sort.o
 perf-y += hist.o
 perf-y += util.o
-perf-y += xyarray.o
 perf-y += cpumap.o
 perf-y += cputopo.o
 perf-y += cgroup.o

tools/perf/util/counts.h

@@ -2,7 +2,7 @@
 #ifndef __PERF_COUNTS_H
 #define __PERF_COUNTS_H
 
-#include "xyarray.h"
+#include <internal/xyarray.h>
 
 struct perf_counts_values {
 	union {

tools/perf/util/evsel.h

@@ -8,7 +8,7 @@
 #include <linux/perf_event.h>
 #include <linux/types.h>
 #include <internal/evsel.h>
-#include "xyarray.h"
+#include <internal/xyarray.h>
 #include "symbol_conf.h"
 #include "cpumap.h"
 #include "counts.h"

tools/perf/util/python-ext-sources

@@ -20,7 +20,6 @@ util/namespaces.c
 ../lib/vsprintf.c
 util/thread_map.c
 util/util.c
-util/xyarray.c
 util/cgroup.c
 util/parse-branch-options.c
 util/rblist.c

tools/perf/util/stat.h

@@ -8,7 +8,6 @@
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/wait.h>
-#include "xyarray.h"
 #include "rblist.h"
 #include "perf.h"
 #include "event.h"