75 lines
1.5 KiB
C++
75 lines
1.5 KiB
C++
#include <rt/mutex.hpp>
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#include <rt/sem.hpp>
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#include <rt/task.hpp>
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#include <rt/trap.hpp>
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#include <rt/assert.h>
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static rt::mutex mutex;
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static unsigned x = 0;
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#define NUM_TASKS 3
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#define ITERATIONS 10000U
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static void trap_last(void)
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{
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static rt::sem trap_sem(NUM_TASKS - 1);
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/* Only the last task to finish will call rt::trap. */
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if (!trap_sem.trywait())
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{
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rt_assert(x == (ITERATIONS * NUM_TASKS), "x has the wrong value");
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rt::trap();
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}
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}
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static void increment_lock(void)
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{
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rt::task::drop_privilege();
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for (unsigned i = 0; i < ITERATIONS; ++i)
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{
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rt::lock_guard lock(mutex);
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++x;
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}
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trap_last();
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}
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static void increment_trylock(void)
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{
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rt::task::drop_privilege();
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for (unsigned i = 0; i < ITERATIONS; ++i)
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{
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while (!mutex.trylock())
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{
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rt::task::sleep(1);
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}
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rt::lock_guard lock(mutex, rt::adopt_lock);
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++x;
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}
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trap_last();
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}
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static void increment_timedlock(void)
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{
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rt::task::drop_privilege();
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for (unsigned i = 0; i < ITERATIONS; ++i)
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{
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while (!mutex.timedlock(1))
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{
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}
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rt::lock_guard lock(mutex, rt::adopt_lock);
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++x;
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}
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trap_last();
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}
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static void timeout(void)
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{
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rt::task::sleep(1000);
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rt_assert(false, "timed out");
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}
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RT_TASK(increment_lock, RT_STACK_MIN, 1);
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RT_TASK(increment_trylock, RT_STACK_MIN, 1);
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RT_TASK(increment_timedlock, RT_STACK_MIN, 1);
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RT_TASK(timeout, RT_STACK_MIN, 2);
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