OpenDDS::RTPS::GuidGenerator Class Reference

#include <GuidGenerator.h>

List of all members.

Public Types
typedef unsigned char	Node_ID [NODE_ID_SIZE]
	NODE_ID_SIZE = 6
enum	{ NODE_ID_SIZE = 6 }
Public Member Functions
	GuidGenerator ()
	Default constructor - initializes pid and MAC address values.
void	populate (DCPS::GUID_t &container)
Private Member Functions
ACE_UINT16	getCount ()
Private Attributes
Node_ID	node_id_
pid_t	pid_
ACE_Thread_Mutex	counter_lock_
ACE_UINT16	counter_

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Detailed Description

Generate GuidPrefix_t values for use with RTPS Also see GuidConverter.h in dds/DCPS 0 GUID_t.guidPrefix[ 0] == VendorId_t == 0x01 for OCI (used for OpenDDS) 1 GUID_t.guidPrefix[ 1] == VendorId_t == 0x03 for OCI (used for OpenDDS) 2 GUID_t.guidPrefix[ 2] == MAC Address 3 GUID_t.guidPrefix[ 3] == MAC Address 4 GUID_t.guidPrefix[ 4] == MAC Address 5 GUID_t.guidPrefix[ 5] == MAC Address 6 GUID_t.guidPrefix[ 6] == MAC Address 7 GUID_t.guidPrefix[ 7] == MAC Address 8 GUID_t.guidPrefix[ 8] == Process ID (MS byte) 9 GUID_t.guidPrefix[ 9] == Process ID (LS byte) 10 GUID_t.guidPrefix[10] == Counter (MS byte) 11 GUID_t.guidPrefix[11] == Counter (LS byte)

Definition at line 34 of file GuidGenerator.h.

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Member Typedef Documentation

typedef unsigned char OpenDDS::RTPS::GuidGenerator::Node_ID[NODE_ID_SIZE]

Definition at line 40 of file GuidGenerator.h.

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Member Enumeration Documentation

anonymous enum

Borrowed from ACE::UUID_Node, definition of the MAC address holder type

Enumerator:

NODE_ID_SIZE

Definition at line 39 of file GuidGenerator.h.

{NODE_ID_SIZE = 6};

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Constructor & Destructor Documentation

OpenDDS::RTPS::GuidGenerator::GuidGenerator

(

)

Default constructor - initializes pid and MAC address values.

Definition at line 22 of file GuidGenerator.cpp.

References node_id_, NODE_ID_SIZE, and pid_.

  : pid_(ACE_OS::getpid()),
    counter_(0)
{

  if (pid_ == -1) {
    unsigned seed = static_cast<unsigned>(ACE_OS::gettimeofday().usec());
    pid_ = static_cast<pid_t>(ACE_OS::rand_r(&seed));
  }

  ACE_OS::macaddr_node_t macaddress;
  const int result = ACE_OS::getmacaddress(&macaddress);

  if (-1 != result) {
    ACE_OS::memcpy(node_id_, macaddress.node, NODE_ID_SIZE);
  } else {
    node_id_[0] = static_cast<unsigned char>(ACE_OS::rand());
    node_id_[1] = static_cast<unsigned char>(ACE_OS::rand());
    node_id_[2] = static_cast<unsigned char>(ACE_OS::rand());
    node_id_[3] = static_cast<unsigned char>(ACE_OS::rand());
    node_id_[4] = static_cast<unsigned char>(ACE_OS::rand());
    node_id_[5] = static_cast<unsigned char>(ACE_OS::rand());
  }
}

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Member Function Documentation

ACE_UINT16 OpenDDS::RTPS::GuidGenerator::getCount

(

)

[private]

Definition at line 48 of file GuidGenerator.cpp.

References counter_.

Referenced by populate().

{
  ACE_Guard<ACE_SYNCH_MUTEX> guard(this->counter_lock_);
  return counter_++;
}

void OpenDDS::RTPS::GuidGenerator::populate

(

DCPS::GUID_t &

container

)

populate a GUID container with a unique ID. This will increment the counter, and use a lock (if compiled with MT ACE) while doing so.

Definition at line 55 of file GuidGenerator.cpp.

References getCount(), OpenDDS::DCPS::GUID_t::guidPrefix, node_id_, NODE_ID_SIZE, pid_, and OpenDDS::DCPS::VENDORID_OCI.

Referenced by OpenDDS::RTPS::RtpsDiscovery::add_domain_participant().

{
  container.guidPrefix[0] = DCPS::VENDORID_OCI[0];
  container.guidPrefix[1] = DCPS::VENDORID_OCI[1];

  ACE_UINT16 count = this->getCount();
  ACE_OS::memcpy(&container.guidPrefix[2], node_id_, NODE_ID_SIZE);
  container.guidPrefix[8] = static_cast<CORBA::Octet>(this->pid_ >> 8);
  container.guidPrefix[9] = static_cast<CORBA::Octet>(this->pid_ & 0xFF);
  container.guidPrefix[10] = static_cast<CORBA::Octet>(count >> 8);
  container.guidPrefix[11] = static_cast<CORBA::Octet>(count & 0xFF);
}

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Member Data Documentation

ACE_UINT16 OpenDDS::RTPS::GuidGenerator::counter_ [private]

Definition at line 56 of file GuidGenerator.h.

Referenced by getCount().

ACE_Thread_Mutex OpenDDS::RTPS::GuidGenerator::counter_lock_ [private]

Definition at line 55 of file GuidGenerator.h.

Node_ID OpenDDS::RTPS::GuidGenerator::node_id_ [private]

Definition at line 53 of file GuidGenerator.h.

Referenced by GuidGenerator(), and populate().

pid_t OpenDDS::RTPS::GuidGenerator::pid_ [private]

Definition at line 54 of file GuidGenerator.h.

Referenced by GuidGenerator(), and populate().

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The documentation for this class was generated from the following files:

• GuidGenerator.h
• GuidGenerator.cpp

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