semaphore_unittest.cc File Reference

#include <thread>
#include "flutter/fml/synchronization/semaphore.h"
#include "flutter/fml/thread.h"
#include "flutter/fml/time/time_point.h"
#include "gtest/gtest.h"

Go to the source code of this file.

Functions
	TEST (SemaphoreTest, SimpleValidity)
	TEST (SemaphoreTest, WaitOnZero)
	TEST (SemaphoreTest, WaitOnZeroSignalThenWait)
	TEST (SemaphoreTest, IndefiniteWait)

Function Documentation

TEST() [1/4]

TEST	(	SemaphoreTest	,
		IndefiniteWait
	)

Definition at line 31 of file semaphore_unittest.cc.

                                    {
  auto start = fml::TimePoint::Now();
  constexpr double wait_in_seconds = 0.25;
  fml::Semaphore sem(0);
  ASSERT_TRUE(sem.IsValid());
  fml::Thread signaller("signaller_thread");
  signaller.GetTaskRunner()->PostTaskForTime(
      [&sem]() { sem.Signal(); },
      start + fml::TimeDelta::FromSecondsF(wait_in_seconds));
  ASSERT_TRUE(sem.Wait());
  auto delta = fml::TimePoint::Now() - start;
  ASSERT_GE(delta.ToSecondsF(), wait_in_seconds);
  signaller.Join();
}

TEST() [2/4]

TEST	(	SemaphoreTest	,
		SimpleValidity
	)

Definition at line 12 of file semaphore_unittest.cc.

                                    {
  fml::Semaphore sem(100);
  ASSERT_TRUE(sem.IsValid());
}

TEST() [3/4]

TEST	(	SemaphoreTest	,
		WaitOnZero
	)

Definition at line 17 of file semaphore_unittest.cc.

                                {
  fml::Semaphore sem(0);
  ASSERT_FALSE(sem.TryWait());
}

TEST() [4/4]

TEST	(	SemaphoreTest	,
		WaitOnZeroSignalThenWait
	)

Definition at line 22 of file semaphore_unittest.cc.

                                              {
  fml::Semaphore sem(0);
  ASSERT_FALSE(sem.TryWait());
  std::thread thread([&sem]() { sem.Signal(); });
  thread.join();
  ASSERT_TRUE(sem.TryWait());
  ASSERT_FALSE(sem.TryWait());
}