premiere-libtorrent/test/test_fence.cpp

/*

Copyright (c) 2003-2016, Arvid Norberg
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      the documentation and/or other materials provided with the distribution.
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      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
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*/

#include "libtorrent/storage.hpp"
#include "libtorrent/disk_io_job.hpp"
#include "libtorrent/performance_counters.hpp"
#include "test.hpp"

#include <atomic>

using namespace libtorrent;

using libtorrent::aux::disk_job_fence;

TORRENT_TEST(empty_fence)
{
	disk_job_fence fence;
	counters cnt;

	disk_io_job test_job[10];

	// issue 5 jobs. None of them should be blocked by a fence
	int ret_int = 0;
	bool ret = false;
	// add a fence job
	ret_int = fence.raise_fence(&test_job[5], &test_job[6], cnt);
	// since we don't have any outstanding jobs
	// we need to post this job
	TEST_CHECK(ret_int == disk_job_fence::fence_post_fence);

	ret = fence.is_blocked(&test_job[7]);
	TEST_CHECK(ret == true);
	ret = fence.is_blocked(&test_job[8]);
	TEST_CHECK(ret == true);

	tailqueue<disk_io_job> jobs;

	// complete the fence job
	fence.job_complete(&test_job[5], jobs);

	// now it's fine to post the blocked jobs
	TEST_CHECK(jobs.size() == 2);
	TEST_CHECK(jobs.first() == &test_job[7]);

	// the disk_io_fence has an assert in its destructor
	// to make sure all outstanding jobs are completed, so we must
	// complete them before we're done
	fence.job_complete(&test_job[7], jobs);
	fence.job_complete(&test_job[8], jobs);
}

TORRENT_TEST(job_fence)
{
	counters cnt;
	disk_job_fence fence;

	disk_io_job test_job[10];

	// issue 5 jobs. None of them should be blocked by a fence
	int ret_int = 0;
	bool ret = false;
	TEST_CHECK(fence.num_outstanding_jobs() == 0);
	ret = fence.is_blocked(&test_job[0]);
	TEST_CHECK(ret == false);
	TEST_CHECK(fence.num_outstanding_jobs() == 1);
	ret = fence.is_blocked(&test_job[1]);
	TEST_CHECK(ret == false);
	ret = fence.is_blocked(&test_job[2]);
	TEST_CHECK(ret == false);
	ret = fence.is_blocked(&test_job[3]);
	TEST_CHECK(ret == false);
	ret = fence.is_blocked(&test_job[4]);
	TEST_CHECK(ret == false);

	TEST_CHECK(fence.num_outstanding_jobs() == 5);
	TEST_CHECK(fence.num_blocked() == 0);

	// add a fence job
	ret_int = fence.raise_fence(&test_job[5], &test_job[6], cnt);
	// since we have outstanding jobs, no need
	// to post anything
	TEST_CHECK(ret_int == disk_job_fence::fence_post_flush);

	ret = fence.is_blocked(&test_job[7]);
	TEST_CHECK(ret == true);
	ret = fence.is_blocked(&test_job[8]);
	TEST_CHECK(ret == true);

	tailqueue<disk_io_job> jobs;

	fence.job_complete(&test_job[3], jobs);
	TEST_CHECK(jobs.size() == 0);
	fence.job_complete(&test_job[2], jobs);
	TEST_CHECK(jobs.size() == 0);
	fence.job_complete(&test_job[4], jobs);
	TEST_CHECK(jobs.size() == 0);
	fence.job_complete(&test_job[1], jobs);
	TEST_CHECK(jobs.size() == 0);
	fence.job_complete(&test_job[0], jobs);
	TEST_EQUAL(jobs.size(), 0);

	// the flush job completes
	fence.job_complete(&test_job[6], jobs);

	// this was the last job. Now we should be
	// able to run the fence job
	TEST_EQUAL(jobs.size(), 1);

	TEST_CHECK(jobs.first() == &test_job[5]);
	jobs.pop_front();

	// complete the fence job
	fence.job_complete(&test_job[5], jobs);

	// now it's fine to post the blocked jobs
	TEST_EQUAL(jobs.size(), 2);
	TEST_CHECK(jobs.first() == &test_job[7]);

	// the disk_io_fence has an assert in its destructor
	// to make sure all outstanding jobs are completed, so we must
	// complete them before we're done
	fence.job_complete(&test_job[7], jobs);
	fence.job_complete(&test_job[8], jobs);
}

TORRENT_TEST(double_fence)
{
	counters cnt;
	disk_job_fence fence;

	disk_io_job test_job[10];

	// issue 5 jobs. None of them should be blocked by a fence
	int ret_int = 0;
	bool ret = false;
	TEST_CHECK(fence.num_outstanding_jobs() == 0);
	ret = fence.is_blocked(&test_job[0]);
	TEST_CHECK(ret == false);
	TEST_CHECK(fence.num_outstanding_jobs() == 1);
	ret = fence.is_blocked(&test_job[1]);
	TEST_CHECK(ret == false);
	ret = fence.is_blocked(&test_job[2]);
	TEST_CHECK(ret == false);
	ret = fence.is_blocked(&test_job[3]);
	TEST_CHECK(ret == false);
	ret = fence.is_blocked(&test_job[4]);
	TEST_CHECK(ret == false);

	TEST_CHECK(fence.num_outstanding_jobs() == 5);
	TEST_CHECK(fence.num_blocked() == 0);

	// add two fence jobs
	ret_int = fence.raise_fence(&test_job[5], &test_job[6], cnt);
	// since we have outstanding jobs, no need
	// to post anything
	TEST_CHECK(ret_int == disk_job_fence::fence_post_flush);

	ret_int = fence.raise_fence(&test_job[7], &test_job[8], cnt);
	// since we have outstanding jobs, no need
	// to post anything
	TEST_CHECK(ret_int == disk_job_fence::fence_post_none);
	std::printf("ret: %d\n", ret_int);

	ret = fence.is_blocked(&test_job[9]);
	TEST_CHECK(ret == true);

	tailqueue<disk_io_job> jobs;

	fence.job_complete(&test_job[3], jobs);
	TEST_CHECK(jobs.size() == 0);
	fence.job_complete(&test_job[2], jobs);
	TEST_CHECK(jobs.size() == 0);
	fence.job_complete(&test_job[4], jobs);
	TEST_CHECK(jobs.size() == 0);
	fence.job_complete(&test_job[1], jobs);
	TEST_CHECK(jobs.size() == 0);
	fence.job_complete(&test_job[0], jobs);
	TEST_CHECK(jobs.size() == 0);
	fence.job_complete(&test_job[6], jobs);
	// this was the last job. Now we should be
	// able to run the fence job
	TEST_CHECK(jobs.size() == 1);

	TEST_CHECK(jobs.first() == &test_job[5]);
	jobs.pop_front();

	// complete the fence job
	fence.job_complete(&test_job[5], jobs);

	// now it's fine to run the next fence job
	// first we get the flush job
	TEST_CHECK(jobs.size() == 1);
	TEST_CHECK(jobs.first() == &test_job[8]);
	jobs.pop_front();

	fence.job_complete(&test_job[8], jobs);

	// then the fence itself
	TEST_CHECK(jobs.size() == 1);
	TEST_CHECK(jobs.first() == &test_job[7]);
	jobs.pop_front();

	fence.job_complete(&test_job[7], jobs);

	// and now we can run the remaining blocked job
	TEST_CHECK(jobs.size() == 1);
	TEST_CHECK(jobs.first() == &test_job[9]);

	// the disk_io_fence has an assert in its destructor
	// to make sure all outstanding jobs are completed, so we must
	// complete them before we're done
	fence.job_complete(&test_job[9], jobs);
}