/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
#ident "Copyright (c) 2007-2012 Tokutek Inc.  All rights reserved."
#ident "The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it."
#include <toku_portability.h>
#include "test.h"
#include "minicron.h"
#include <unistd.h>

#include <string.h>
#include <stdlib.h>

static double
tdiff (struct timeval *a, struct timeval *b) {
    return (a->tv_sec-b->tv_sec) + (a->tv_usec-b->tv_usec)*1e-6;
}

struct timeval starttime;
static double elapsed (void) {
    struct timeval now;
    gettimeofday(&now, 0);
    return tdiff(&now, &starttime);
}

static int 
#ifndef GCOV
__attribute__((__noreturn__))
#endif
never_run (void *a) {
    assert(a==0);
    assert(0);
#if TOKU_WINDOWS || defined(GCOV)
    return 0; //ICC ignores the noreturn attribute.
#endif
}

// Can we start something with period=0 (the function should never run) and shut it down.
static void*
test1 (void* v)
{
    struct minicron m;
    ZERO_STRUCT(m);
    int r = toku_minicron_setup(&m, 0, never_run, 0);   assert(r==0);
    sleep(1);
    r = toku_minicron_shutdown(&m);                     assert(r==0);
    return v;
}

// Can we start something with period=10 and shut it down after 2 seconds (the function should never run) .
static void*
test2 (void* v)
{
    struct minicron m;
    ZERO_STRUCT(m);
    int r = toku_minicron_setup(&m, 10, never_run, 0);   assert(r==0);
    sleep(2);
    r = toku_minicron_shutdown(&m);                     assert(r==0);
    return v;
}

struct tenx {
    struct timeval tv;
    int counter;
};

static int
run_5x (void *v) {
    struct tenx *CAST_FROM_VOIDP(tx, v);
    struct timeval now;
    gettimeofday(&now, 0);
    double diff = tdiff(&now, &tx->tv);
    if (verbose) printf("T=%f tx->counter=%d\n", diff, tx->counter);
    // We only verify that the timer was not premature.  
    // Sometimes it will be delayed, but there's no good way to test it and nothing we can do about it.
    if (!(diff>0.5 + tx->counter)) {
      printf("T=%f tx->counter=%d\n", diff, tx->counter);
      assert(0);
    }
    tx->counter++;
    return 0;
}

// Start something with period=1 and run it a few times
static void*
test3 (void* v)
{
    struct minicron m;
    struct tenx tx;
    gettimeofday(&tx.tv, 0);
    tx.counter=0;
    ZERO_STRUCT(m);
    int r = toku_minicron_setup(&m, 1, run_5x, &tx);   assert(r==0);
    sleep(5);
    r = toku_minicron_shutdown(&m);                     assert(r==0);
    assert(tx.counter>=4 && tx.counter<=5); // after 5 seconds it could have run 4 or 5 times.
    return v;
}

static int
run_3sec (void *v) {
    if (verbose) printf("start3sec at %.6f\n", elapsed());
    int *CAST_FROM_VOIDP(counter, v);
    (*counter)++;
    sleep(3);
    if (verbose) printf("end3sec at %.6f\n", elapsed());
    return 0;
}

// make sure that if f is really slow that it doesn't run too many times
static void*
test4 (void *v) {
    struct minicron m;
    int counter = 0;
    ZERO_STRUCT(m);
    int r = toku_minicron_setup(&m, 2, run_3sec, &counter); assert(r==0);
    sleep(9);
    r = toku_minicron_shutdown(&m);                     assert(r==0);
    assert(counter==2);
    return v;
}

static void*
test5 (void *v) {
    struct minicron m;
    int counter = 0;
    ZERO_STRUCT(m);
    int r = toku_minicron_setup(&m, 10, run_3sec, &counter); assert(r==0);
    toku_minicron_change_period(&m, 2);
    sleep(9);
    r = toku_minicron_shutdown(&m);                     assert(r==0);
    assert(counter==2);
    return v;
}

static void*
test6 (void *v) {
    struct minicron m;
    ZERO_STRUCT(m);
    int r = toku_minicron_setup(&m, 5, never_run, 0); assert(r==0);
    toku_minicron_change_period(&m, 0);
    sleep(7);
    r = toku_minicron_shutdown(&m);                          assert(r==0);
    return v;
}

typedef void*(*ptf)(void*);
int
test_main (int argc, const char *argv[]) {
    default_parse_args(argc,argv);
    gettimeofday(&starttime, 0);

    ptf testfuns[] = {test1, test2, test3,
		      test4,
		      test5,
		      test6
    };
#define N (sizeof(testfuns)/sizeof(testfuns[0]))
    toku_pthread_t tests[N];

    unsigned int i;
    for (i=0; i<N; i++) {
	int r=toku_pthread_create(tests+i, 0, testfuns[i], 0);
	assert(r==0);
    }
    for (i=0; i<N; i++) {
	void *v;
	int r=toku_pthread_join(tests[i], &v);
	assert(r==0);
	assert(v==0);
    }
    return 0;
}