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Diffstat (limited to 'test/cpp/thread_manager/thread_manager_test.cc')
-rw-r--r-- | test/cpp/thread_manager/thread_manager_test.cc | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/test/cpp/thread_manager/thread_manager_test.cc b/test/cpp/thread_manager/thread_manager_test.cc new file mode 100644 index 0000000000..5c70103947 --- /dev/null +++ b/test/cpp/thread_manager/thread_manager_test.cc @@ -0,0 +1,136 @@ +/* + * + * Copyright 2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + *is % allowed in string + */ + +#include <memory> +#include <string> + +#include <gflags/gflags.h> +#include <grpc++/grpc++.h> +#include <grpc/support/log.h> +#include <grpc/support/port_platform.h> + +#include "src/cpp/thread_manager/thread_manager.h" +#include "test/cpp/util/test_config.h" + +namespace grpc { +class ThreadManagerTest GRPC_FINAL : public grpc::ThreadManager { + public: + ThreadManagerTest() + : ThreadManager(kMinPollers, kMaxPollers), + num_do_work_(0), + num_poll_for_work_(0), + num_work_found_(0) {} + + grpc::ThreadManager::WorkStatus PollForWork(void **tag, + bool *ok) GRPC_OVERRIDE; + void DoWork(void *tag, bool ok) GRPC_OVERRIDE; + void PerformTest(); + + private: + void SleepForMs(int sleep_time_ms); + + static const int kMinPollers = 2; + static const int kMaxPollers = 10; + + static const int kPollingTimeoutMsec = 10; + static const int kDoWorkDurationMsec = 1; + + // PollForWork will return SHUTDOWN after these many number of invocations + static const int kMaxNumPollForWork = 50; + + gpr_atm num_do_work_; // Number of calls to DoWork + gpr_atm num_poll_for_work_; // Number of calls to PollForWork + gpr_atm num_work_found_; // Number of times WORK_FOUND was returned +}; + +void ThreadManagerTest::SleepForMs(int duration_ms) { + gpr_timespec sleep_time = + gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), + gpr_time_from_millis(duration_ms, GPR_TIMESPAN)); + gpr_sleep_until(sleep_time); +} + +grpc::ThreadManager::WorkStatus ThreadManagerTest::PollForWork(void **tag, + bool *ok) { + int call_num = gpr_atm_no_barrier_fetch_add(&num_poll_for_work_, 1); + + if (call_num >= kMaxNumPollForWork) { + Shutdown(); + return SHUTDOWN; + } + + // Simulate "polling for work" by sleeping for sometime + SleepForMs(kPollingTimeoutMsec); + + *tag = nullptr; + *ok = true; + + // Return timeout roughly 1 out of every 3 calls + if (call_num % 3 == 0) { + return TIMEOUT; + } else { + gpr_atm_no_barrier_fetch_add(&num_work_found_, 1); + return WORK_FOUND; + } +} + +void ThreadManagerTest::DoWork(void *tag, bool ok) { + gpr_atm_no_barrier_fetch_add(&num_do_work_, 1); + SleepForMs(kDoWorkDurationMsec); // Simulate doing work by sleeping +} + +void ThreadManagerTest::PerformTest() { + // Initialize() starts the ThreadManager + Initialize(); + + // Wait for all the threads to gracefully terminate + Wait(); + + // The number of times DoWork() was called is equal to the number of times + // WORK_FOUND was returned + gpr_log(GPR_DEBUG, "DoWork() called %ld times", + gpr_atm_no_barrier_load(&num_do_work_)); + GPR_ASSERT(gpr_atm_no_barrier_load(&num_do_work_) == + gpr_atm_no_barrier_load(&num_work_found_)); +} +} // namespace grpc + +int main(int argc, char **argv) { + std::srand(std::time(NULL)); + + grpc::testing::InitTest(&argc, &argv, true); + grpc::ThreadManagerTest test_rpc_manager; + test_rpc_manager.PerformTest(); + + return 0; +} |