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#include <assert.h>
#include <ck_ec.h>
#include <ck_stdbool.h>
#include "fuzz_harness.h"
static int gettime(const struct ck_ec_ops *, struct timespec *out);
static void wake32(const struct ck_ec_ops *, const uint32_t *);
static void wait32(const struct ck_ec_wait_state *, const uint32_t *,
uint32_t, const struct timespec *);
static void wake64(const struct ck_ec_ops *, const uint64_t *);
static void wait64(const struct ck_ec_wait_state *, const uint64_t *,
uint64_t, const struct timespec *);
static const struct ck_ec_ops test_ops = {
.gettime = gettime,
.wait32 = wait32,
.wait64 = wait64,
.wake32 = wake32,
.wake64 = wake64
};
static const struct ck_ec_mode modes[] = {
{
.single_producer = true,
.ops = &test_ops
},
{
.single_producer = false,
.ops = &test_ops
},
};
static bool woken = false;
static int gettime(const struct ck_ec_ops *ops, struct timespec *out)
{
(void)out;
assert(ops == &test_ops);
return -1;
}
static void wait32(const struct ck_ec_wait_state *state, const uint32_t *addr,
uint32_t expected, const struct timespec *deadline)
{
(void)addr;
(void)expected;
(void)deadline;
assert(state->ops == &test_ops);
return;
}
static void wait64(const struct ck_ec_wait_state *state, const uint64_t *addr,
uint64_t expected, const struct timespec *deadline)
{
(void)addr;
(void)expected;
(void)deadline;
assert(state->ops == &test_ops);
return;
}
static void wake32(const struct ck_ec_ops *ops, const uint32_t *addr)
{
(void)addr;
assert(ops == &test_ops);
woken = true;
return;
}
static void wake64(const struct ck_ec_ops *ops, const uint64_t *addr)
{
(void)addr;
assert(ops == &test_ops);
woken = true;
return;
}
/*
* Check that adding a value calls the wake function when the sign bit
* is set, and does not call it when the sign bit is unset (modulo
* wrap-around).
*/
struct example {
uint64_t initial;
uint64_t increment;
};
const struct example examples[] = {
{ INT32_MAX, 0 },
{ INT32_MAX, 1 },
{ 0 + (0U << 31), 0 },
{ 1 + (0U << 31), 0 },
{ 0 + (1U << 31), 0 },
{ 1 + (1U << 31), 0 },
{ 0 + (0U << 31), 1 },
{ 1 + (0U << 31), 1 },
{ 0 + (1U << 31), 1 },
{ 1 + (1U << 31), 1 },
{ 0 + (0U << 31), INT32_MAX },
{ 1 + (0U << 31), INT32_MAX },
{ 0 + (1U << 31), INT32_MAX },
{ 1 + (1U << 31), INT32_MAX },
{ INT64_MAX, 0 },
{ INT64_MAX, 1 },
{ 0 + (0ULL << 63), 0 },
{ 1 + (0ULL << 63), 0 },
{ 0 + (1ULL << 63), 0 },
{ 1 + (1ULL << 63), 0 },
{ 0 + (0ULL << 63), 1 },
{ 1 + (0ULL << 63), 1 },
{ 0 + (1ULL << 63), 1 },
{ 1 + (1ULL << 63), 1 },
{ 0 + (0ULL << 63), INT64_MAX },
{ 1 + (0ULL << 63), INT64_MAX },
{ 0 + (1ULL << 63), INT64_MAX },
{ 1 + (1ULL << 63), INT64_MAX },
};
static inline int test_wakeup(const struct example *example)
{
for (size_t i = 0; i < 2; i++) {
const struct ck_ec_mode *mode = &modes[i];
const uint32_t increment = example->increment & INT32_MAX;
struct ck_ec32 ec;
bool should_wake;
bool may_wake;
ec.counter = example->initial;
should_wake = increment != 0 && (ec.counter & (1U << 31));
may_wake = should_wake || (ec.counter & (1U << 31));
woken = false;
ck_ec32_add(&ec, mode, increment);
assert(!should_wake || woken);
assert(may_wake || !woken);
assert(!woken || ck_ec32_has_waiters(&ec) == false);
/* Test inc now. */
ec.counter = example->initial + increment;
should_wake = ec.counter & (1U << 31);
may_wake = should_wake || ((ec.counter + 1) & (1U << 31));
woken = false;
ck_ec32_inc(&ec, mode);
assert(!should_wake || woken);
assert(may_wake || !woken);
assert(!woken || ck_ec32_has_waiters(&ec) == false);
}
#ifdef CK_F_EC64
for (size_t i = 0; i < 2; i++) {
const struct ck_ec_mode *mode = &modes[i];
const uint64_t increment = example->increment & INT64_MAX;
struct ck_ec64 ec;
bool should_wake;
bool may_wake;
ec.counter = example->initial;
should_wake = increment != 0 && (ec.counter & 1);
may_wake = should_wake || (ec.counter & 1);
woken = false;
ck_ec64_add(&ec, mode, increment);
assert(!should_wake || woken);
assert(may_wake || !woken);
assert(!woken || ck_ec64_has_waiters(&ec) == false);
/* Test inc now. */
ec.counter = example->initial + increment;
should_wake = ec.counter & 1;
woken = false;
ck_ec64_inc(&ec, mode);
assert(should_wake == woken);
assert(!woken || ck_ec64_has_waiters(&ec) == false);
}
#endif /* CK_F_EC64 */
return 0;
}
TEST(test_wakeup, examples)
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