main.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <switch.h>
#include <deko3d.h>

int main(int argc, char **argv) {
    consoleInit(NULL);

    padConfigureInput(1, HidNpadStyleSet_NpadStandard);

    PadState pad;
    padInitializeDefault(&pad);

    DkDeviceMaker device_maker;
    dkDeviceMakerDefaults(&device_maker);

    DkDevice device = dkDeviceCreate(&device_maker);

    DkMemBlockMaker memblock_maker;
    dkMemBlockMakerDefaults(&memblock_maker, device, 0x100000);
    memblock_maker.flags = DkMemBlockFlags_CpuUncached | DkMemBlockFlags_GpuCached;
    // memblock_maker.flags = DkMemBlockFlags_CpuCached | DkMemBlockFlags_GpuCached;
    DkMemBlock memblock = dkMemBlockCreate(&memblock_maker);

    u64 tick_start = armGetSystemTick();
    for (int i = 0; i < 100; ++i) {
        memset(dkMemBlockGetCpuAddr(memblock), 0, dkMemBlockGetSize(memblock));
        // dkMemBlockFlushCpuCache(memblock, 0, dkMemBlockGetSize(memblock));
    }
    printf("Took %fus\n", (float)armTicksToNs(armGetSystemTick() - tick_start) / 1.0e3f);

    while (appletMainLoop()) {
        padUpdate(&pad);
        if (padGetButtonsDown(&pad) & HidNpadButton_Plus)
            break;
        consoleUpdate(NULL);
    }

    dkMemBlockDestroy(memblock);
    dkDeviceDestroy(device);

    consoleExit(NULL);
    return 0;
}