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Diffstat (limited to 'ACE/ace/UUID.cpp')
-rw-r--r-- | ACE/ace/UUID.cpp | 481 |
1 files changed, 481 insertions, 0 deletions
diff --git a/ACE/ace/UUID.cpp b/ACE/ace/UUID.cpp new file mode 100644 index 00000000000..1a4d0386d40 --- /dev/null +++ b/ACE/ace/UUID.cpp @@ -0,0 +1,481 @@ +//$Id$ + +#include "ace/UUID.h" +#include "ace/Guard_T.h" + +#if !defined (__ACE_INLINE__) +#include "ace/UUID.inl" +#endif /* __ACE_INLINE__ */ + +#include "ace/Log_Msg.h" +#include "ace/OS_NS_stdio.h" +#include "ace/OS_NS_string.h" +#include "ace/OS_NS_sys_time.h" +#include "ace/OS_NS_netdb.h" +#include "ace/OS_NS_unistd.h" +#include "ace/ACE.h" + +ACE_RCSID (ace, + UUID, + "$Id$") + + +ACE_BEGIN_VERSIONED_NAMESPACE_DECL + +namespace ACE_Utils +{ + + UUID_node::UUID_node (void) + { + for (int i = 0; i < UUID_node::NODE_ID_SIZE; ++i) + { + nodeID_[i] = 0; + } + } + + UUID_node::NodeID& + UUID_node::nodeID (void) + { + return nodeID_; + } + + void + UUID_node::nodeID (NodeID& nodeID) + { + for (int i = 0; i < UUID_node::NODE_ID_SIZE; ++i) + { + nodeID_[i] = nodeID[i]; + } + } + + UUID UUID::NIL_UUID; + + /// Construct a nil UUID. Such a UUID has every one of it's data + /// elements set to zero. + UUID::UUID(void) + : timeLow_ (0), + timeMid_ (0), + timeHiAndVersion_ (0), + clockSeqHiAndReserved_ (0), + clockSeqLow_ (0), + as_string_ (0) + { + ACE_NEW (node_, + UUID_node); + + node_release_ = 1; + } + + /// Construct a UUID from a string representation of an UUID. + UUID::UUID (const ACE_CString& uuid_string) + : timeLow_ (0), + timeMid_ (0), + timeHiAndVersion_ (0), + clockSeqHiAndReserved_ (0), + clockSeqLow_ (0), + as_string_ (0) + { + ACE_NEW (node_, + UUID_node); + + node_release_ = 1; + + + if (uuid_string.length() < NIL_UUID.to_string ()->length ()) + { + ACE_DEBUG ((LM_DEBUG, + "%N ACE_UUID::UUID - " + "IllegalArgument(incorrect string length)\n")); + return; + } + + /// Special case for the nil UUID. + if (uuid_string == *NIL_UUID.to_string ()) + { + bool copy_constructor_not_supported = false; + ACE_ASSERT (copy_constructor_not_supported); + //*this = NIL_UUID; + ACE_UNUSED_ARG (copy_constructor_not_supported); + return; + } + + unsigned int timeLow; + unsigned int timeMid; + unsigned int timeHiAndVersion; + unsigned int clockSeqHiAndReserved; + unsigned int clockSeqLow; + unsigned int node [UUID_node::NODE_ID_SIZE]; + char thr_pid_buf [BUFSIZ]; + + if (uuid_string.length() == NIL_UUID.to_string()->length()) + { + // This might seem quite strange this being in ACE, but it + // seems to be a bit difficult to write a facade for ::sscanf + // because some compilers dont support vsscanf, including + // MSVC. It appears that most platforms support sscanf though + // so we need to use it directly. + const int nScanned = + ::sscanf(uuid_string.c_str(), + "%8x-%4x-%4x-%2x%2x-%2x%2x%2x%2x%2x%2x", + &timeLow, + &timeMid, + &timeHiAndVersion, + &clockSeqHiAndReserved, + &clockSeqLow, + &node[0], + &node[1], + &node[2], + &node[3], + &node[4], + &node[5] + ); + + if (nScanned != 11) + { + ACE_DEBUG ((LM_DEBUG, + "UUID::UUID - " + "IllegalArgument(invalid string representation)\n")); + return; + } + } + else + { + const int nScanned = + ::sscanf (uuid_string.c_str(), + "%8x-%4x-%4x-%2x%2x-%2x%2x%2x%2x%2x%2x-%s", + &timeLow, + &timeMid, + &timeHiAndVersion, + &clockSeqHiAndReserved, + &clockSeqLow, + &node[0], + &node[1], + &node[2], + &node[3], + &node[4], + &node[5], + thr_pid_buf + ); + + if (nScanned != 12) + { + ACE_DEBUG ((LM_DEBUG, + "ACE_UUID::ACE_UUID - " + "IllegalArgument(invalid string representation)\n")); + return; + } + } + + this->timeLow_ = static_cast<ACE_UINT32> (timeLow); + this->timeMid_ = static_cast<ACE_UINT16> (timeMid); + this->timeHiAndVersion_ = static_cast<ACE_UINT16> (timeHiAndVersion); + this->clockSeqHiAndReserved_ = static_cast<u_char> (clockSeqHiAndReserved); + this->clockSeqLow_ = static_cast<u_char> (clockSeqLow); + + UUID_node::NodeID nodeID; + for (int i = 0; i < UUID_node::NODE_ID_SIZE; ++i) + nodeID [i] = static_cast<u_char> (node[i]); + + this->node_->nodeID (nodeID); + + // Support varient 10- only + if ((this->clockSeqHiAndReserved_ & 0xc0) != 0x80 && (this->clockSeqHiAndReserved_ & 0xc0) != 0xc0) + { + ACE_DEBUG ((LM_DEBUG, + "ACE_UUID_Impl::ACE_UUID_Impl - " + "IllegalArgument(unsupported variant)\n")); + return; + } + + /// Support versions 1, 3, and 4 only + ACE_UINT16 V1 = this->timeHiAndVersion_; + + if ((V1 & 0xF000) != 0x1000 && + (V1 & 0xF000) != 0x3000 && + (V1 & 0xF000) != 0x4000) + { + ACE_DEBUG ((LM_DEBUG, + "ACE_UUID::ACE_UUID - " + "IllegalArgument(unsupported version)\n")); + return; + } + if ((this->clockSeqHiAndReserved_ & 0xc0) == 0xc0) + { + if (uuid_string.length() == NIL_UUID.to_string()->length()) + { + ACE_DEBUG ((LM_DEBUG, + "ACE_UUID::ACE_UUID - " + "IllegalArgument (Missing Thread and Process Id)\n")); + return; + } + ACE_CString thr_pid_str (thr_pid_buf); + ssize_t pos = thr_pid_str.find ('-'); + if (pos == -1) + ACE_DEBUG ((LM_DEBUG, + "ACE_UUID::ACE_UUID - " + "IllegalArgument (Thread and Process Id format incorrect)\n")); + + this->thr_id_ = thr_pid_str.substr (0, pos); + this->pid_ = thr_pid_str.substr (pos+1, thr_pid_str.length ()-pos-1); + } + } + + UUID::~UUID (void) + { + if (node_release_) + delete node_; + + if (as_string_ != 0) + delete as_string_; + } + + const ACE_CString* + UUID::to_string (void) + { + /// Only compute the string representation once. + if (as_string_ == 0) + { + // Get a buffer exactly the correct size. Use the nil UUID as a + // gauge. Don't forget the trailing nul. + size_t UUID_STRING_LENGTH = 36 + thr_id_.length () + pid_.length (); + char *buf; + + if ((thr_id_.length () != 0) && (pid_.length () != 0)) + { + UUID_STRING_LENGTH += 2; //for '-' + ACE_NEW_RETURN (buf, + char[UUID_STRING_LENGTH + 1], + 0); + + ACE_OS::sprintf(buf, + "%8.8x-%4.4x-%4.4x-%2.2x%2.2x-%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x-%s-%s", + this->timeLow_, + this->timeMid_, + this->timeHiAndVersion_, + this->clockSeqHiAndReserved_, + this->clockSeqLow_, + (this->node_->nodeID ()) [0], + (this->node_->nodeID ()) [1], + (this->node_->nodeID ()) [2], + (this->node_->nodeID ()) [3], + (this->node_->nodeID ()) [4], + (this->node_->nodeID ()) [5], + thr_id_.c_str (), + pid_.c_str () + ); + } + else + { + ACE_NEW_RETURN (buf, + char[UUID_STRING_LENGTH + 1], + 0); + + ACE_OS::sprintf (buf, + "%8.8x-%4.4x-%4.4x-%2.2x%2.2x-%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x", + this->timeLow_, + this->timeMid_, + this->timeHiAndVersion_, + this->clockSeqHiAndReserved_, + this->clockSeqLow_, + (this->node_->nodeID ()) [0], + (this->node_->nodeID ()) [1], + (this->node_->nodeID ()) [2], + (this->node_->nodeID ()) [3], + (this->node_->nodeID ()) [4], + (this->node_->nodeID ()) [5] + ); + } + + ACE_NEW_RETURN (this->as_string_, + ACE_CString (buf, UUID_STRING_LENGTH), + 0); + delete [] buf; + } + + return as_string_; + } + + UUID_Generator::UUID_Generator () + : timeLast_ (0) + { + ACE_NEW (lock_, + ACE_SYNCH_MUTEX); + destroy_lock_ = 1; + } + + UUID_Generator::~UUID_Generator() + { + if (destroy_lock_) + delete lock_; + } + + void + UUID_Generator::init (void) + { + ACE_OS::macaddr_node_t macaddress; + int result = + ACE_OS::getmacaddress (&macaddress); + + UUID_node::NodeID nodeID; + if (result != -1) + { +// ACE_DEBUG ((LM_DEBUG, +// "%02X-%02X-%02X-%02X-%02X-%02X\n", +// macaddress.node [0], +// macaddress.node [1], +// macaddress.node [2], +// macaddress.node [3], +// macaddress.node [4], +// macaddress.node [5])); + + ACE_OS::memcpy (&nodeID, + macaddress.node, + sizeof (nodeID)); + } + else + { + nodeID [0] = static_cast<u_char> (ACE_OS::rand()); + nodeID [1] = static_cast<u_char> (ACE_OS::rand()); + nodeID [2] = static_cast<u_char> (ACE_OS::rand()); + nodeID [3] = static_cast<u_char> (ACE_OS::rand()); + nodeID [4] = static_cast<u_char> (ACE_OS::rand()); + nodeID [5] = static_cast<u_char> (ACE_OS::rand()); + } + + this->get_timestamp (timeLast_); + + { + ACE_GUARD (ACE_SYNCH_MUTEX, ace_mon, *lock_); + uuid_state_.timestamp = timeLast_; + uuid_state_.node.nodeID (nodeID); + } + } + + + void + UUID_Generator::generateUUID (UUID& uuid,ACE_UINT16 version, u_char variant) + { + UUID_time timestamp; + this->get_timestamp (timestamp); + + + // Construct a Version 1 UUID with the information in the arguements. + uuid.timeLow (static_cast<ACE_UINT32> (timestamp & 0xFFFFFFFF)); + uuid.timeMid (static_cast<ACE_UINT16> ((timestamp >> 32) & 0xFFFF)); + + + ACE_UINT16 tHAV = static_cast<ACE_UINT16> ((timestamp >> 48) & 0xFFFF); + tHAV |= (version << 12); + uuid.timeHiAndVersion (tHAV); + + u_char cseqHAV; + { + ACE_GUARD (ACE_SYNCH_MUTEX, mon, *lock_); + uuid.clockSeqLow (static_cast<u_char> (uuid_state_.clockSequence & 0xFF)); + cseqHAV = static_cast<u_char> ((uuid_state_.clockSequence & 0x3f00) >> 8); + uuid_state_.timestamp = timestamp; + } + + cseqHAV |= variant; + uuid.clockSeqHiAndReserved (cseqHAV); + uuid.node (&(uuid_state_.node)); + + if (variant == 0xc0) + { + ACE_Thread_ID thread_id; + char buf [BUFSIZ]; + thread_id.to_string (buf); + uuid.thr_id (buf); + + ACE_OS::sprintf (buf, + "%d", + static_cast<int> (ACE_OS::getpid ())); + uuid.pid (buf); + } + } + + UUID* + UUID_Generator::generateUUID (ACE_UINT16 version, u_char variant) + { + UUID* uuid; + ACE_NEW_RETURN (uuid, + UUID, + 0); + + this->generateUUID (*uuid, version, variant); + return uuid; + } + + /// Obtain a new timestamp. If UUID's are being generated too quickly + /// the clock sequence will be incremented + void + UUID_Generator::get_timestamp (UUID_time& timestamp) + { + ACE_GUARD (ACE_SYNCH_MUTEX, mon, *lock_); + + this->get_systemtime(timestamp); + + // Account for the clock being set back. Increment the clock / + // sequence. + if (timestamp <= timeLast_) + uuid_state_.clockSequence = static_cast<u_char> ((uuid_state_.clockSequence + 1) & ACE_UUID_CLOCK_SEQ_MASK); + + // If the system time ticked since the last UUID was + // generated. Set / the clock sequence back. + else if (timestamp > timeLast_) + uuid_state_.clockSequence = 0; + + timeLast_ = timestamp; + } + + /** + * ACE_Time_Value is in POSIX time, seconds since Jan 1, 1970. UUIDs use + * time in 100ns ticks since 15 October 1582. The difference is: + * 15 Oct 1582 - 1 Jan 1600: 17 days in Oct, 30 in Nov, 31 in Dec + + * 17 years and 4 leap days (1584, 88, 92 and 96) + * 1 Jan 1600 - 1 Jan 1900: 3 centuries + 73 leap days ( 25 in 17th cent. + * and 24 each in 18th and 19th centuries) + * 1 Jan 1900 - 1 Jan 1970: 70 years + 17 leap days. + * This adds up, in days: (17+30+31+365*17+4)+(365*300+73)+(365*70+17) or + * 122192928000000000U (0x1B21DD213814000) 100 ns ticks. + */ + void + UUID_Generator::get_systemtime (UUID_time & timestamp) + { + const UUID_time timeOffset = ACE_UINT64_LITERAL (0x1B21DD213814000); + + /// Get the time of day, convert to 100ns ticks then add the offset. + ACE_Time_Value now = ACE_OS::gettimeofday(); + ACE_UINT64 time; + now.to_usec (time); + time = time * 10; + timestamp = time + timeOffset; +} + + ACE_SYNCH_MUTEX* + UUID_Generator::lock (void) + { + return this->lock_; + } + + ACE_SYNCH_MUTEX* + UUID_Generator::lock (ACE_SYNCH_MUTEX* lock, + int release_lock_) + { + if (destroy_lock_) + delete lock_; + + ACE_SYNCH_MUTEX* prev_lock = this->lock_; + this->lock_ = lock; + this->destroy_lock_ = release_lock_; + return prev_lock; + } + +} + +#if defined (ACE_HAS_EXPLICIT_STATIC_TEMPLATE_MEMBER_INSTANTIATION) +template ACE_Singleton<ACE_Utils::UUID_Generator, ACE_SYNCH_MUTEX> * + ACE_Singleton<ACE_Utils::UUID_Generator, ACE_SYNCH_MUTEX>::singleton_; +#endif /* ACE_HAS_EXPLICIT_STATIC_TEMPLATE_MEMBER_INSTANTIATION */ + +ACE_END_VERSIONED_NAMESPACE_DECL |