SOEM/osal/win32/osal.c

/******************************************************************************
 *                *          ***                    ***
 *              ***          ***                    ***
 * ***  ****  **********     ***        *****       ***  ****          *****
 * *********  **********     ***      *********     ************     *********
 * ****         ***          ***              ***   ***       ****   ***
 * ***          ***  ******  ***      ***********   ***        ****   *****
 * ***          ***  ******  ***    *************   ***        ****      *****
 * ***          ****         ****   ***       ***   ***       ****          ***
 * ***           *******      ***** **************  *************    *********
 * ***             *****        ***   *******   **  **  ******         *****
 *                           t h e  r e a l t i m e  t a r g e t  e x p e r t s
 *
 * http://www.rt-labs.com
 * Copyright (C) 2009. rt-labs AB, Sweden. All rights reserved.
 *------------------------------------------------------------------------------
 * $Id: osal.c 464 2013-03-13 20:40:25Z smf.arthur $
 *------------------------------------------------------------------------------
 */

#include <winsock2.h>
#include <osal.h>
#include "osal_win32.h"

static int64_t sysfrequency;
static double qpc2usec;

#define USECS_PER_SEC     1000000
  
int osal_gettimeofday (struct timeval *tv, struct timezone *tz)
{
   int64_t wintime, usecs;
   if(!sysfrequency)
   {
      timeBeginPeriod(1);
      QueryPerformanceFrequency((LARGE_INTEGER *)&sysfrequency);
      qpc2usec = 1000000.0 / sysfrequency;
   }
   QueryPerformanceCounter((LARGE_INTEGER *)&wintime);
   usecs = (int64_t)((double)wintime * qpc2usec);
   tv->tv_sec = (long)(usecs / 1000000);
   tv->tv_usec = (long)(usecs - (tv->tv_sec * 1000000));
   
   return 1;
}

ec_timet osal_current_time (void)
{
   struct timeval current_time;
   ec_timet return_value;

   osal_gettimeofday (&current_time, 0);
   return_value.sec = current_time.tv_sec;
   return_value.usec = current_time.tv_usec;
   return return_value;
}

void osal_time_diff(ec_timet *start, ec_timet *end, ec_timet *diff)
{
   diff->sec = end->sec - start->sec;                             
   diff->usec = end->usec - start->usec;                             
   if (diff->usec < 0) {                                              
     --diff->sec;                                                     
     diff->usec += 1000000;                                           
   }                                                                         
}

void osal_timer_start (osal_timert *self, uint32 timeout_usec)
{
   struct timeval start_time;
   struct timeval timeout;
   struct timeval stop_time;

   osal_gettimeofday (&start_time, 0);
   timeout.tv_sec = timeout_usec / USECS_PER_SEC;
   timeout.tv_usec = timeout_usec % USECS_PER_SEC;
   timeradd (&start_time, &timeout, &stop_time);

   self->stop_time.sec = stop_time.tv_sec;
   self->stop_time.usec = stop_time.tv_usec;
}

boolean osal_timer_is_expired (osal_timert *self)
{
   struct timeval current_time;
   struct timeval stop_time;
   int is_not_yet_expired;

   osal_gettimeofday (&current_time, 0);
   stop_time.tv_sec = self->stop_time.sec;
   stop_time.tv_usec = self->stop_time.usec;
   is_not_yet_expired = timercmp (&current_time, &stop_time, <);

   return is_not_yet_expired == FALSE;
}

int osal_usleep(uint32 usec)
{
   osal_timert qtime;
   osal_timer_start(&qtime, usec);
   if(usec >= 1000)
   {
      SleepEx(usec / 1000, FALSE);
   }
   while(!osal_timer_is_expired(&qtime));
   return 1;
}

void *osal_malloc(size_t size)
{
   return malloc(size);
}

void osal_free(void *ptr)
{
   free(ptr);
}

int osal_thread_create(void **thandle, int stacksize, void *func, void *param)
{
   *thandle = CreateThread(NULL, stacksize, func, param, 0, NULL);
   if(!thandle) 
   {
      return 0;
   }
   return 1;
}

int osal_thread_create_rt(void **thandle, int stacksize, void *func, void *param)
{
   int ret;
   ret = osal_thread_create(thandle, stacksize, func, param);
   if (ret)
   {
      ret = SetThreadPriority(*thandle, THREAD_PRIORITY_TIME_CRITICAL);
   }
   return ret;
}