Ticket #4576: TimerTest (snooze_until, 1 thread).cpp

#include <Application.h>
#include <MessageRunner.h>
#include <stdio.h>
#include <stdlib.h>
#include <OS.h>

#include <private/shared/AutoDeleter.h>

enum {
    second = 1000000,
};

enum {
    timerMsg = 1,
};

enum {
    maxDelay = second/10,
    minDelay = 1,
    stepCnt = 5000,
};

class TestApplication: public BApplication
{
private:
    bigtime_t fScheduledTime;

    int32 fCurStep;
    bigtime_t fDelays[stepCnt];
    bigtime_t fStat[stepCnt];

public:
    TestApplication(): BApplication("application/x-vnd.test-app"),
        fCurStep(0)
    {
        for (int32 i = 0; i < stepCnt; i++) {
            fDelays[i] = minDelay + (maxDelay - minDelay)*i/(stepCnt - 1);
        }
    }

    void ReadyToRun()
    {
        while (fCurStep < stepCnt) {
            {
                bigtime_t now = system_time();
                fScheduledTime = now + fDelays[fCurStep];
                snooze_until(fScheduledTime, B_SYSTEM_TIMEBASE);
            }
            {
                bigtime_t now = system_time();
                fStat[fCurStep] = now - fScheduledTime;
            }
            fCurStep++;
        }
        for (int32 i = 0; i < stepCnt; i++) {
            printf("%.06E %.06E\n", double(fDelays[i])/second, double(fStat[i])/second);
        }
        PostMessage(B_QUIT_REQUESTED);
    }

};


int main()
{
    TestApplication app;
    app.Run();
    return 0;
}