errno_test.c


#include <furi.h>
#include <errno.h>
 
#define TAG        "ErrnoTest"
#define THREAD_CNT 16
#define ITER_CNT   1000
 
static int32_t errno_fuzzer(void* context) {
    int start_value = *(int*)context;
    int32_t fails = 0;
 
    for(int i = start_value; i < start_value + ITER_CNT; i++) {
        errno = i;
        furi_thread_yield();
        if(errno != i) fails++;
    }
 
    for(int i = 0; i < ITER_CNT; i++) {
        errno = 0;
        furi_thread_yield();
        UNUSED(strtol("123456", NULL, 10));
        furi_thread_yield();
        if(errno != 0) fails++;
 
        errno = 0;
        furi_thread_yield();
        UNUSED(strtol("123456123456123456123456123456123456123456123456", NULL, 10));
        furi_thread_yield();
        if(errno != ERANGE) fails++;
    }
 
    return fails;
}
 
int32_t errno_test_app(void* p) {
    UNUSED(p);
    int start_values[THREAD_CNT];
    FuriThread* threads[THREAD_CNT];
 
    for(int i = 0; i < THREAD_CNT; i++) {
        start_values[i] = i * ITER_CNT;
        threads[i] = furi_thread_alloc_ex("ErrnoFuzzer", 1024, errno_fuzzer, &start_values[i]);
        furi_thread_set_priority(
            threads[i],
            FuriThreadPriorityIsr); // our threads will most likely be preempting each other
 
        furi_thread_start(threads[i]);
    }
 
    for(int i = 0; i < THREAD_CNT; i++) {
        furi_thread_join(threads[i]);
        int32_t failed = furi_thread_get_return_code(threads[i]);
        furi_thread_free(threads[i]);
 
        if(failed)
            FURI_LOG_E(TAG, "thread %d failed %ld out of %d times", i, failed, ITER_CNT);
        else
            FURI_LOG_D(TAG, "thread %d pass", i);
    }
 
    return 0;
}
↑ V530 The return value of function 'strtol' is required to be utilized.