save-buffer commented on a change in pull request #12537:
URL: https://github.com/apache/arrow/pull/12537#discussion_r824953047
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File path: cpp/src/arrow/compute/exec/tpch_node.cc
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@@ -0,0 +1,3836 @@
+#include "arrow/compute/exec/tpch_node.h"
+#include "arrow/util/make_unique.h"
+#include "arrow/util/future.h"
+#include "arrow/util/unreachable.h"
+
+#include <algorithm>
+#include <bitset>
+#include <cstring>
+#include <random>
+#include <vector>
+#include <memory>
+#include <mutex>
+#include <queue>
+#include <unordered_set>
+
+namespace arrow
+{
+ using internal::checked_cast;
+
+ namespace compute
+ {
+ class TpchText
+ {
+ public:
+ Status InitIfNeeded(random::pcg32_fast &rng);
+ Result<Datum> GenerateComments(
+ size_t num_comments,
+ size_t min_length,
+ size_t max_length,
+ random::pcg32_fast &rng);
+
+ private:
+ bool GenerateWord(int64_t &offset, random::pcg32_fast &rng, char
*arr, const char **words, size_t num_choices);
+ bool GenerateNoun(int64_t &offset, random::pcg32_fast &rng, char
*arr);
+ bool GenerateVerb(int64_t &offset, random::pcg32_fast &rng, char
*arr);
+ bool GenerateAdjective(int64_t &offset, random::pcg32_fast &rng,
char *arr);
+ bool GenerateAdverb(int64_t &offset, random::pcg32_fast &rng, char
*arr);
+ bool GeneratePreposition(int64_t &offset, random::pcg32_fast &rng,
char *arr);
+ bool GenerateAuxiliary(int64_t &offset, random::pcg32_fast &rng,
char *arr);
+ bool GenerateTerminator(int64_t &offset, random::pcg32_fast &rng,
char *arr);
+
+ bool GenerateNounPhrase(int64_t &offset, random::pcg32_fast &rng,
char *arr);
+ bool GenerateVerbPhrase(int64_t &offset, random::pcg32_fast &rng,
char *arr);
+ bool GeneratePrepositionalPhrase(int64_t &offset,
random::pcg32_fast &rng, char *arr);
+
+ bool GenerateSentence(int64_t &offset, random::pcg32_fast &rng,
char *arr);
+
+ std::atomic<bool> done_ = { false };
+ int64_t generated_offset_ = 0;
+ std::mutex text_guard_;
Review comment:
I need the same one to be visible to each thread.
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