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Implement ticker.

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Implement ticker, which provides a simple API for ticking off some
number of events before indicating that the ticker has hit its limit.
This commit is contained in:
Jason Evans
2016-02-02 20:27:54 -08:00
committed by Jason Evans
parent 94451d184b
commit 9998000b2b
6 changed files with 163 additions and 2 deletions
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76
test/unit/ticker.c Normal file
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#include "test/jemalloc_test.h"
TEST_BEGIN(test_ticker_tick)
{
#define NREPS 2
#define NTICKS 3
ticker_t ticker;
int32_t i, j;
ticker_init(&ticker, NTICKS);
for (i = 0; i < NREPS; i++) {
for (j = 0; j < NTICKS; j++) {
assert_u_eq(ticker_read(&ticker), NTICKS - j,
"Unexpected ticker value (i=%d, j=%d)", i, j);
assert_false(ticker_tick(&ticker),
"Unexpected ticker fire (i=%d, j=%d)", i, j);
}
assert_u32_eq(ticker_read(&ticker), 0,
"Expected ticker depletion");
assert_true(ticker_tick(&ticker),
"Expected ticker fire (i=%d)", i);
assert_u32_eq(ticker_read(&ticker), NTICKS,
"Expected ticker reset");
}
#undef NTICKS
}
TEST_END
TEST_BEGIN(test_ticker_ticks)
{
#define NTICKS 3
ticker_t ticker;
ticker_init(&ticker, NTICKS);
assert_u_eq(ticker_read(&ticker), NTICKS, "Unexpected ticker value");
assert_false(ticker_ticks(&ticker, NTICKS), "Unexpected ticker fire");
assert_u_eq(ticker_read(&ticker), 0, "Unexpected ticker value");
assert_true(ticker_ticks(&ticker, NTICKS), "Expected ticker fire");
assert_u_eq(ticker_read(&ticker), NTICKS, "Unexpected ticker value");
assert_true(ticker_ticks(&ticker, NTICKS + 1), "Expected ticker fire");
assert_u_eq(ticker_read(&ticker), NTICKS, "Unexpected ticker value");
#undef NTICKS
}
TEST_END
TEST_BEGIN(test_ticker_copy)
{
#define NTICKS 3
ticker_t ta, tb;
ticker_init(&ta, NTICKS);
ticker_copy(&tb, &ta);
assert_u_eq(ticker_read(&tb), NTICKS, "Unexpected ticker value");
assert_true(ticker_ticks(&tb, NTICKS + 1), "Expected ticker fire");
assert_u_eq(ticker_read(&tb), NTICKS, "Unexpected ticker value");
ticker_tick(&ta);
ticker_copy(&tb, &ta);
assert_u_eq(ticker_read(&tb), NTICKS - 1, "Unexpected ticker value");
assert_true(ticker_ticks(&tb, NTICKS), "Expected ticker fire");
assert_u_eq(ticker_read(&tb), NTICKS, "Unexpected ticker value");
#undef NTICKS
}
TEST_END
int
main(void)
{
return (test(
test_ticker_tick,
test_ticker_ticks,
test_ticker_copy));
}