/* -*- c-file-style: "ruby"; indent-tabs-mode: nil -*- */
/************************************************

  rbglib_timer.c -

  $Author: mutoh $
  $Date: 2005/11/23 14:27:58 $

  Copyright (C) 2005 Masao Mutoh
************************************************/

#include "rbgprivate.h"

#ifdef G_OS_WIN32
#include <windows.h>
#endif

/*****************************************/

/* This is stolen from gtimer.c of glib-2.6.2. */
struct _GTimer
{
#ifdef G_OS_WIN32
  DWORD start;
  DWORD end;
#else /* !G_OS_WIN32 */
  struct timeval start;
  struct timeval end;
#endif /* !G_OS_WIN32 */

  guint active : 1;
};

static GTimer*
timer_copy(timer)
    GTimer* timer;
{
  GTimer* new_timer;
  g_return_val_if_fail (timer != NULL, NULL);

  new_timer = g_new(struct _GTimer, 1);
  *new_timer = *timer;
  return new_timer;
}

GType
g_timer_get_type(void)
{
    static GType our_type = 0;
    if (our_type == 0)
        our_type = g_boxed_type_register_static ("GTimer",
                                                 (GBoxedCopyFunc)timer_copy,
                                                 (GBoxedFreeFunc)g_timer_destroy);
    return our_type;
}
/*****************************************/

#define G_TYPE_TIMER (g_timer_get_type())

#define _SELF(s) ((GTimer*)RVAL2BOXED(s, G_TYPE_TIMER))

static VALUE
timer_initialize(self)
    VALUE self;
{
    G_INITIALIZE(self, g_timer_new());
    return Qnil;
}

static VALUE
timer_start(self)
    VALUE self;
{
    g_timer_start(_SELF(self));
    return self;
}

static VALUE
timer_stop(self)
    VALUE self;
{
    g_timer_stop(_SELF(self));
    return self;
}

#if GLIB_CHECK_VERSION(2,4,0)
static VALUE
timer_continue(self)
    VALUE self;
{
    g_timer_continue(_SELF(self));
    return self;
}
#endif

static VALUE
timer_elapsed(self)
    VALUE self;
{
    gulong microseconds;
    gdouble ret = g_timer_elapsed(_SELF(self), &microseconds);

    return rb_assoc_new(rb_float_new(ret), ULONG2NUM(microseconds));
}

static VALUE
timer_reset(self)
    VALUE self;
{
    g_timer_reset(_SELF(self));
    return self;
}

void
Init_glib_timer()
{
    VALUE timer = G_DEF_CLASS(G_TYPE_TIMER, "Timer", mGLib); 

    rb_define_method(timer, "initialize", timer_initialize, 0);
    rb_define_method(timer, "start", timer_start, 0);
    rb_define_method(timer, "stop", timer_stop, 0);
#if GLIB_CHECK_VERSION(2,4,0)
    rb_define_method(timer, "continue", timer_continue, 0);
#endif
    rb_define_method(timer, "elapsed", timer_elapsed, 0);
    rb_define_method(timer, "reset", timer_reset, 0);
}