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authorArnaldo Carvalho de Melo <acme@redhat.com>2011-01-03 21:39:04 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-01-03 21:39:04 +0300
commit69aad6f1ee69546dea8535ab8f3da9f445d57328 (patch)
treeb328ec140a6a90703a049fcc661d623025d7e81f /tools/perf/util/xyarray.h
parent56f4c400349157289b474a3fd49ee96acab0a4d7 (diff)
downloadlinux-69aad6f1ee69546dea8535ab8f3da9f445d57328.tar.xz
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>
Diffstat (limited to 'tools/perf/util/xyarray.h')
-rw-r--r--tools/perf/util/xyarray.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/tools/perf/util/xyarray.h b/tools/perf/util/xyarray.h
new file mode 100644
index 000000000000..c488a07275dd
--- /dev/null
+++ b/tools/perf/util/xyarray.h
@@ -0,0 +1,20 @@
+#ifndef _PERF_XYARRAY_H_
+#define _PERF_XYARRAY_H_ 1
+
+#include <sys/types.h>
+
+struct xyarray {
+ size_t row_size;
+ size_t entry_size;
+ char contents[];
+};
+
+struct xyarray *xyarray__new(int xlen, int ylen, size_t entry_size);
+void xyarray__delete(struct xyarray *xy);
+
+static inline void *xyarray__entry(struct xyarray *xy, int x, int y)
+{
+ return &xy->contents[x * xy->row_size + y * xy->entry_size];
+}
+
+#endif /* _PERF_XYARRAY_H_ */