Function GetCachedPCRE

extern/re2/re2/testing/regexp_benchmark.cc:960–971

}

PCRE* GetCachedPCRE(const char* regexp) {
  static auto& mutex = *new Mutex;
  MutexLock lock(&mutex);
  static auto& cache = *new std::unordered_map<std::string, PCRE*>;
  PCRE* re = cache[regexp];
  if (re == NULL) {
    re = new PCRE(regexp, PCRE::UTF8);
    CHECK_EQ(re->error(), "");
    cache[regexp] = re;
  }
  return re;
}

RE2* GetCachedRE2(const char* regexp) {
  static auto& mutex = *new Mutex;