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/*
* Copyright © 2022 Mozilla Foundation
*
* This program is made available under an ISC-style license. See the
* accompanying file LICENSE for details.
*/
/* cubeb_triple_buffer test */
#include "gtest/gtest.h"
#if !defined(_XOPEN_SOURCE)
#define _XOPEN_SOURCE 600
#endif
#include "cubeb/cubeb.h"
#include "cubeb_triple_buffer.h"
#include <atomic>
#include <math.h>
#include <memory>
#include <stdio.h>
#include <stdlib.h>
#include <thread>
#include "common.h"
TEST(cubeb, triple_buffer)
{
struct AB {
uint64_t a;
uint64_t b;
};
triple_buffer<AB> buffer;
std::atomic<bool> finished = {false};
ASSERT_TRUE(!buffer.updated());
auto t = std::thread([&finished, &buffer] {
AB ab;
ab.a = 0;
ab.b = UINT64_MAX;
uint64_t counter = 0;
do {
buffer.write(ab);
ab.a++;
ab.b--;
} while (counter++ < 1e6 && ab.a <= UINT64_MAX && ab.b != 0);
finished.store(true);
});
AB ab;
AB old_ab;
old_ab.a = 0;
old_ab.b = UINT64_MAX;
// Wait to have at least one value produced.
while (!buffer.updated()) {
}
// Check that the values are increasing (resp. descreasing) monotonically.
while (!finished) {
ab = buffer.read();
ASSERT_GE(ab.a, old_ab.a);
ASSERT_LE(ab.b, old_ab.b);
old_ab = ab;
}
t.join();
buffer.invalidate();
ASSERT_FALSE(buffer.updated());
}