v2 / vlib / v / slow_tests / keep_args_alive_test_c.h
44 lines · 41 sloc · 940 bytes · 6a32c810703f4ec0c39fe18298ebe6c40acac8f1
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1#include <time.h>


2


3#if defined(_WIN32)


4#define __SLEEP_MS(n) Sleep(n)


5#elif defined(__APPLE__)


6static void __sleep_ms(int ms) {


7    struct timespec ts = {


8        .tv_sec = ms / 1000,


9        .tv_nsec = 1000000L * (ms % 1000)


10    };


11    struct timespec rem;


12    while (nanosleep(&ts, &rem) != 0) {


13        ts = rem;


14    }


15}


16#define __SLEEP_MS(n) __sleep_ms(n)


17#else


18static void __sleep_ms(int ms) {


19    struct timespec ts;


20    clock_gettime(CLOCK_MONOTONIC, &ts);


21    ts.tv_nsec += 1000000L*((ms)%1000);


22    ts.tv_sec += ms/1000;


23    if (ts.tv_nsec >= 1000000000) {


24        ts.tv_nsec -= 1000000000;


25        ++ts.tv_sec;


26    }


27    while (clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &ts, NULL) != 0);


28}


29#define __SLEEP_MS(n) __sleep_ms(n)


30#endif


31


32static volatile int** keep;


33


34static int calc_expr_after_delay(int* a, int b, int* c) {


35    keep = malloc(1000000);


36    keep[43242] = a;


37    keep[86343] = c;


38    a = NULL;


39    c = NULL;


40    __SLEEP_MS(200);


41    int z = *keep[43242] * b + *keep[86343];


42    free(keep);


43    return z;


44}


45