Knowledge Base Nr: 00228 timeout.cpp - http://www.swe-kaiser.de

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linux: timeouthandling für beliebige vorgänge

  
#include <setjmp.h>
#include <signal.h>

static jmp_buf g_progzust_timeout;

static void sig_alarm_handler(int /*sig_nr*/)
{
  printf("ERROR: sig_alarm_handler() called!");
  longjmp(g_progzust_timeout, 1);
}

int CDummyClass::DummyFunc(int nAddr, short* pnValue, int nWordCount)
{
  if (signal(SIGALRM, sig_alarm_handler) == SIG_ERR)
  {
    printf("ERROR: signal(SIGALARM, sig_alarm_handler) failed!");
    return -11;
  }
  if (setjmp(g_progzust_timeout) != 0)
  {
    printf("ERROR: Timeout CDummyClass::DummyFunc(%d, %p, %d)?!", nAddr, pnValue, nWordCount);
    return -12;
  }

  alarm(1);
  int nResult = m_mbusProtocol.readMultipleRegisters(1, nAddr, pnValue, nWordCount);
  alarm(0);

  if (nResult != FTALK_SUCCESS)
  {
    printf("ERROR: CDummyClass::DummyFunc(): %s!\n", getErrorText(nResult));
    return -1;
  }

  return 0;
}