createmailbox.cpp

来自「一个很棒的网络控制系统仿真软件」· C++ 代码 · 共 50 行

#ifndef CREATE_MAILBOX
#define CREATE_MAILBOX

bool ttCreateMailbox(char *nameOfMailbox, int maxSize) {

  MailboxNode* mn;
  Mailbox* m;
  
  if (strcmp(nameOfMailbox,"") == 0) {
    MEX_ERROR("ttCreateMailbox: Name should be a non-empty string!");
    return false;
  }
  if (rtsys->prioFcn == NULL) {
    MEX_ERROR("ttCreateMailbox: Kernel must be initialized before creation of mailboxes!");
    return false;
  } 

  mn = (MailboxNode*) rtsys->mailboxList->getFirst();
  while (mn!=NULL) {
    if (mn->getMailbox()->name != NULL) {
      if (strcmp(mn->getMailbox()->name, nameOfMailbox) == 0)
	break;
    }
    mn = (MailboxNode*) mn->getNext();
  }
  if (mn != NULL) { 
    MEX_ERROR("ttCreateMailbox: Name of mailbox not unique!");
    return false;
  }

  if (maxSize < 1) {
    MEX_ERROR("ttCreateMailbox: Size of mailbox must be greater than zero!");
    return false;
  }

  m = new Mailbox;
  m->name = new char[strlen(nameOfMailbox)+1];
  strcpy(m->name, nameOfMailbox);
  m->maxSize = maxSize;
  m->buffer = new void*[maxSize];
  m->inP = 0;
  m->outP = 0;
  m->count = 0;
  rtsys->mailboxList->appendNode(new MailboxNode(m));
	
  return true;
}

#endif