1

/*

     2

This file is part of CanFestival, a library implementing CanOpen Stack.

     3

     4

Copyright (C): Edouard TISSERANT and Francis DUPIN

     5

Copyright (C) Win32 Port Leonid Tochinski

     6

     7

See COPYING file for copyrights details.

     8

     9

This library is free software; you can redistribute it and/or

    10

modify it under the terms of the GNU Lesser General Public

    11

License as published by the Free Software Foundation; either

    12

version 2.1 of the License, or (at your option) any later version.

    13

    14

This library is distributed in the hope that it will be useful,

    15

but WITHOUT ANY WARRANTY; without even the implied warranty of

    16

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    17

Lesser General Public License for more details.

    18

    19

You should have received a copy of the GNU Lesser General Public

    20

License along with this library; if not, write to the Free Software

    21

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    22

*/

    23

    24

#include <windows.h>

    25

#include <stdlib.h>

    26

#include <sys/timeb.h>

    27

    28

#ifdef __cplusplus

    29

extern "C" {

    30

#endif

    31

    32

#include "applicfg.h"

    33

#include "can_driver.h"

    34

#include "timer.h"

    35

#include "timers_driver.h"

    36

    37

#ifdef __cplusplus

    38

};

    39

#endif

    40

    41

DWORD timebuffer;

    42

    43

/* Synchronization Object Implementation */

    44

CRITICAL_SECTION CanFestival_mutex;

    45

HANDLE timer_thread = NULL;

    46

HANDLE timer = NULL;

    47

    48

int stop_timer=0;

    49

    50

static TimerCallback_t init_callback;

    51

    52

    53

void EnterMutex(void)

    54

{

    55

	EnterCriticalSection(&CanFestival_mutex);

    56

}

    57

    58

void LeaveMutex(void)

    59

{

    60

	LeaveCriticalSection(&CanFestival_mutex);

    61

}

    62

    63

// --------------- CAN Receive Thread Implementation ---------------

    64

    65

void CreateReceiveTask(CAN_HANDLE fd0, TASK_HANDLE* Thread, void* ReceiveLoopPtr)

    66

{

    67

	unsigned long thread_id = 0;

    68

	*Thread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)ReceiveLoopPtr, fd0, 0, &thread_id);

    69

}

    70

    71

void WaitReceiveTaskEnd(TASK_HANDLE *Thread)

    72

{

    73

	if(WaitForSingleObject(*Thread, 1000) == WAIT_TIMEOUT)

    74

	{

    75

		TerminateThread(*Thread, -1);

    76

	}

    77

	CloseHandle(*Thread);

    78

}

    79

    80

#if !defined(WIN32) || defined(__CYGWIN__)

    81

int TimerThreadLoop(void)

    82

#else

    83

DWORD TimerThreadLoop(LPVOID arg)

    84

#endif

    85

{

    86

    87

    88

	while(!stop_timer)

    89

	{

    90

		WaitForSingleObject(timer, INFINITE);

    91

		if(stop_timer)

    92

			break;

    93

		EnterMutex();

    94

		timebuffer = GetTickCount();

    95

		TimeDispatch();

    96

		LeaveMutex();

    97

	}

    98

	return 0;

    99

}

   100

   101

void TimerInit(void)

   102

{

   103

	LARGE_INTEGER liDueTime;

   104

	liDueTime.QuadPart = 0;

   105

   106

	InitializeCriticalSection(&CanFestival_mutex);

   107

   108

	timer = CreateWaitableTimer(NULL, FALSE, NULL);

   109

	if(NULL == timer)

   110

    {

   111

        printf("CreateWaitableTimer failed (%d)\n", GetLastError());

   112

    }

   113

   114

	// Take first absolute time ref in milliseconds.

   115

	timebuffer = GetTickCount();

   116

}

   117

   118

void TimerCleanup(void)

   119

{

   120

	DeleteCriticalSection(&CanFestival_mutex);

   121

}

   122

   123

void StopTimerLoop(TimerCallback_t exitfunction)

   124

{

   125

	EnterMutex();

   126

	exitfunction(NULL,0);

   127

	LeaveMutex();

   128

   129

	stop_timer = 1;

   130

	setTimer(0);

   131

	if(WaitForSingleObject(timer_thread,1000) == WAIT_TIMEOUT)

   132

	{

   133

		TerminateThread(timer_thread, -1);

   134

	}

   135

	CloseHandle(timer);

   136

	CloseHandle(timer_thread);

   137

}

   138

   139

void StartTimerLoop(TimerCallback_t _init_callback)

   140

{

   141

	unsigned long timer_thread_id;

   142

	stop_timer = 0;

   143

	init_callback = _init_callback;

   144

	EnterMutex();

   145

		// At first, TimeDispatch will call init_callback.

   146

	SetAlarm(NULL, 0, init_callback, 0, 0);

   147

	LeaveMutex();

   148

	timer_thread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)TimerThreadLoop, NULL, 0, &timer_thread_id);

   149

}

   150

   151

/* Set the next alarm */

   152

void setTimer(TIMEVAL value)

   153

{

   154

	if(value == TIMEVAL_MAX)

   155

		CancelWaitableTimer(timer);

   156

	else

   157

	{

   158

		LARGE_INTEGER liDueTime;

   159

   160

		/* arg 2 of SetWaitableTimer take 100 ns interval */

   161

		liDueTime.QuadPart = ((long long) (-1) * value * 10000);

   162

		//printf("SetTimer(%llu)\n", value);

   163

   164

		if (!SetWaitableTimer(timer, &liDueTime, 0, NULL, NULL, FALSE))

   165

		{

   166

			printf("SetWaitableTimer failed (%d)\n", GetLastError());

   167

		}

   168

	}

   169

}

   170

   171

/* Get the elapsed time since the last occured alarm */

   172

TIMEVAL getElapsedTime(void)

   173

{

   174

  DWORD timetmp = GetTickCount();

   175

  return (timetmp - timebuffer);

   176

}

   177