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[libcpu/arm] fix race condition with ldrex,strex (#7842)

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Signed-off-by: Shell <smokewood@qq.com>
This commit is contained in:
Shell
2023-07-25 14:07:44 +08:00
committed by GitHub
parent 0a6aaf12ad
commit acfa74f078
6 changed files with 23 additions and 15 deletions
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examples/utest/testcases/kernel/atomic_tc.c
+5 -3
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@@ -134,10 +134,11 @@ static void ture_entry(void *parameter)
static void test_atomic_add(void)
{
rt_thread_t thread;
int i;
size_t i;
sem_t = rt_sem_create("atomic_sem", 0, RT_IPC_FLAG_PRIO);
count = 0;
rt_atomic_store(&count, 0);
thread = rt_thread_create("t1", ture_entry, RT_NULL, THREAD_STACKSIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
rt_thread_startup(thread);
thread = rt_thread_create("t2", ture_entry, RT_NULL, THREAD_STACKSIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
@@ -149,7 +150,8 @@ static void test_atomic_add(void)
{
rt_sem_take(sem_t, RT_WAITING_FOREVER);
}
uassert_true(count == 3000000);
i = rt_atomic_load(&count);
uassert_true(i == 3000000);
}
static rt_err_t utest_tc_init(void)