ccore/test/modules/SpinLockTests.c

#include <stdio.h>
#include <threads.h>

#include "../Tests.h"
#include "core/SpinLock.h"
#include "core/Utility.h"

typedef struct {
    mtx_t m;
    int counter;
} MutexCounter;

static int incrementMutexCounter(void* p) {
    MutexCounter* mcp = (MutexCounter*)p;
    for(int i = 0; i < 20000; i++) {
        mtx_lock(&mcp->m);
        mcp->counter++;
        mtx_unlock(&mcp->m);
    }
    return 0;
}

static void testMutex() {
    i64 n = -getNanos();

    MutexCounter mc = {.counter = 0};
    mtx_init(&mc.m, mtx_plain);
    thrd_t t[2];
    thrd_create(t + 0, incrementMutexCounter, &mc);
    thrd_create(t + 1, incrementMutexCounter, &mc);
    thrd_join(t[0], nullptr);
    thrd_join(t[1], nullptr);
    TEST_INT(40000, mc.counter);

    n += getNanos();
    printf("%ldns Mutex\n", n);
}

typedef struct {
    SpinLock s;
    int counter;
} SpinLockCounter;

static int incrementSpinLockCounter(void* p) {
    SpinLockCounter* mcp = (SpinLockCounter*)p;
    for(int i = 0; i < 20000; i++) {
        lockSpinLock(&mcp->s);
        mcp->counter++;
        unlockSpinLock(&mcp->s);
    }
    return 0;
}

static void testSpinLockLoop() {
    i64 n = -getNanos();

    SpinLockCounter sc = {.counter = 0};
    initSpinLock(&sc.s);
    thrd_t t[2];
    thrd_create(t + 0, incrementSpinLockCounter, &sc);
    thrd_create(t + 1, incrementSpinLockCounter, &sc);
    thrd_join(t[0], nullptr);
    thrd_join(t[1], nullptr);
    TEST_INT(40000, sc.counter);

    n += getNanos();
    printf("%ldns SpinLock\n", n);
}

void testSpinLock() {
    testMutex();
    testSpinLockLoop();
}