/**
* Win32 specific code
**/
#include <stdio.h>
#include <sys/timeb.h>
#include <time.h>
#include <windows.h>
/* provided by POUS.C */
extern int common_ticktime__;
long AtomicCompareExchange(long* atomicvar, long compared, long exchange)
{
return InterlockedCompareExchange(atomicvar, exchange, compared);
}
struct _timeb timetmp;
void PLC_GetTime(IEC_TIME *CURRENT_TIME)
{
_ftime(&timetmp);
(*CURRENT_TIME).tv_sec = timetmp.time;
(*CURRENT_TIME).tv_nsec = timetmp.millitm * 1000000;
}
void PLC_timer_notify()
{
PLC_GetTime(&__CURRENT_TIME);
__run();
}
HANDLE PLC_timer = NULL;
void PLC_SetTimer(long long next, long long period)
{
LARGE_INTEGER liDueTime;
/* arg 2 of SetWaitableTimer take 100 ns interval*/
liDueTime.QuadPart = next / (-100);
/*
printf("SetTimer(%lld,%lld)\n",next, period);
*/
if (!SetWaitableTimer(PLC_timer, &liDueTime, common_ticktime__, NULL, NULL, 0))
{
printf("SetWaitableTimer failed (%d)\n", GetLastError());
}
}
/* Variable used to stop plcloop thread */
int runplcloop;
void PlcLoop()
{
runplcloop = 1;
while(runplcloop)
{
// Set a timer
PLC_SetTimer(Ttick,Ttick);
if (WaitForSingleObject(PLC_timer, INFINITE) != WAIT_OBJECT_0)
{
printf("WaitForSingleObject failed (%d)\n", GetLastError());
}
PLC_timer_notify();
}
}
HANDLE PLC_thread;
HANDLE debug_sem;
HANDLE debug_wait_sem;
HANDLE python_sem;
HANDLE python_wait_sem;
#define maxval(a,b) ((a>b)?a:b)
int startPLC(int argc,char **argv)
{
unsigned long thread_id = 0;
/* Translate PLC's microseconds to Ttick nanoseconds */
Ttick = 1000000 * maxval(common_ticktime__,1);
debug_sem = CreateSemaphore(
NULL, // default security attributes
1, // initial count
1, // maximum count
NULL); // unnamed semaphore
if (debug_sem == NULL)
{
printf("startPLC CreateSemaphore debug_sem error: %d\n", GetLastError());
return;
}
debug_wait_sem = CreateSemaphore(
NULL, // default security attributes
0, // initial count
1, // maximum count
NULL); // unnamed semaphore
if (debug_wait_sem == NULL)
{
printf("startPLC CreateSemaphore debug_wait_sem error: %d\n", GetLastError());
return;
}
python_sem = CreateSemaphore(
NULL, // default security attributes
1, // initial count
1, // maximum count
NULL); // unnamed semaphore
if (python_sem == NULL)
{
printf("startPLC CreateSemaphore python_sem error: %d\n", GetLastError());
return;
}
python_wait_sem = CreateSemaphore(
NULL, // default security attributes
0, // initial count
1, // maximum count
NULL); // unnamed semaphore
if (python_wait_sem == NULL)
{
printf("startPLC CreateSemaphore python_wait_sem error: %d\n", GetLastError());
return;
}
/* Create a waitable timer */
PLC_timer = CreateWaitableTimer(NULL, FALSE, "WaitableTimer");
if(NULL == PLC_timer)
{
printf("CreateWaitableTimer failed (%d)\n", GetLastError());
return 1;
}
if( __init(argc,argv) == 0 )
{
printf("Tick Time : %d ms\n", common_ticktime__);
PLC_thread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)PlcLoop, NULL, 0, &thread_id);
}
else{
return 1;
}
return 0;
}
static int __debug_tick;
int TryEnterDebugSection(void)
{
//printf("TryEnterDebugSection\n");
return WaitForSingleObject(debug_sem, 0) == WAIT_OBJECT_0;
}
void LeaveDebugSection(void)
{
ReleaseSemaphore(debug_sem, 1, NULL);
//printf("LeaveDebugSection\n");
}
int stopPLC()
{
runplcloop = 0;
WaitForSingleObject(PLC_thread, INFINITE);
__cleanup();
__debug_tick = -1;
ReleaseSemaphore(debug_wait_sem, 1, NULL);
CloseHandle(debug_sem);
CloseHandle(debug_wait_sem);
CloseHandle(PLC_timer);
CloseHandle(PLC_thread);
}
/* from plc_debugger.c */
int WaitDebugData()
{
if(WaitForSingleObject(debug_wait_sem, INFINITE) != WAIT_OBJECT_0) return -1;
return __debug_tick;
}
/* Called by PLC thread when debug_publish finished
* This is supposed to unlock debugger thread in WaitDebugData*/
void InitiateDebugTransfer()
{
/* remember tick */
__debug_tick = __tick;
/* signal debugger thread it can read data */
ReleaseSemaphore(debug_wait_sem, 1, NULL);
}
void suspendDebug()
{
__DEBUG = 0;
/* Prevent PLC to enter debug code */
WaitForSingleObject(debug_sem, INFINITE);
}
void resumeDebug()
{
__DEBUG = 1;
/* Let PLC enter debug code */
ReleaseSemaphore(debug_sem, 1, NULL);
}
/* from plc_python.c */
int WaitPythonCommands(void)
{
/* Wait signal from PLC thread */
return WaitForSingleObject(python_wait_sem, INFINITE);
}
/* Called by PLC thread on each new python command*/
void UnBlockPythonCommands(void)
{
/* signal debugger thread it can read data */
ReleaseSemaphore(python_wait_sem, 1, NULL);
}
int TryLockPython(void)
{
return WaitForSingleObject(python_sem, 0) == WAIT_OBJECT_0;
}
void UnLockPython(void)
{
ReleaseSemaphore(python_sem, 1, NULL);
}
void LockPython(void)
{
WaitForSingleObject(python_sem, INFINITE);
}