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554 lines
17 KiB
C++
554 lines
17 KiB
C++
//$Id: UUID.cpp 81541 2008-04-30 13:56:12Z shuston $
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#include "ace/UUID.h"
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#include "ace/Guard_T.h"
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#if !defined (__ACE_INLINE__)
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#include "ace/UUID.inl"
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#endif /* __ACE_INLINE__ */
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#include "ace/Log_Msg.h"
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#include "ace/OS_NS_stdio.h"
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#include "ace/OS_NS_string.h"
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#include "ace/OS_NS_sys_time.h"
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#include "ace/OS_NS_netdb.h"
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#include "ace/OS_NS_unistd.h"
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#include "ace/ACE.h"
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ACE_RCSID (ace,
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UUID,
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"$Id: UUID.cpp 81541 2008-04-30 13:56:12Z shuston $")
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ACE_BEGIN_VERSIONED_NAMESPACE_DECL
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namespace ACE_Utils
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{
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UUID_Node::UUID_Node (void)
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{
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for (int i = 0; i < UUID_Node::NODE_ID_SIZE; ++i)
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node_ID_[i] = 0;
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}
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UUID_Node::Node_ID&
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UUID_Node::node_ID (void)
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{
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return node_ID_;
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}
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void
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UUID_Node::node_ID (Node_ID& node_ID)
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{
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for (int i = 0; i < UUID_Node::NODE_ID_SIZE; ++i)
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node_ID_[i] = node_ID[i];
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}
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UUID UUID::NIL_UUID;
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/// Construct a nil UUID. Such a UUID has every one of it's data
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/// elements set to zero.
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UUID::UUID (void)
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: time_low_ (0),
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time_mid_ (0),
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time_hi_and_version_ (0),
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clock_seq_hi_and_reserved_ (0),
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clock_seq_low_ (0),
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node_ (0),
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node_release_ (true),
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as_string_ (0)
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{
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ACE_NEW (node_,
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UUID_Node);
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}
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/// Construct a UUID from a string representation of an UUID.
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UUID::UUID (const ACE_CString& uuid_string)
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: time_low_ (0),
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time_mid_ (0),
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time_hi_and_version_ (0),
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clock_seq_hi_and_reserved_ (0),
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clock_seq_low_ (0),
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node_ (0),
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node_release_ (true),
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as_string_ (0)
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{
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ACE_NEW (node_,
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UUID_Node);
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this->from_string_i (uuid_string);
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}
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UUID::UUID (const UUID &right)
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: time_low_ (right.time_low_),
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time_mid_ (right.time_mid_),
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time_hi_and_version_ (right.time_hi_and_version_),
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clock_seq_hi_and_reserved_ (right.clock_seq_hi_and_reserved_),
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clock_seq_low_ (right.clock_seq_low_),
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as_string_ (0)
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{
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ACE_NEW (node_,
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UUID_Node (*right.node_));
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}
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UUID::~UUID (void)
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{
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if (node_release_)
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delete node_;
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if (as_string_ != 0)
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delete as_string_;
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}
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const ACE_CString*
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UUID::to_string (void)
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{
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/// Only compute the string representation once.
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if (as_string_ == 0)
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{
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// Get a buffer exactly the correct size. Use the nil UUID as a
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// gauge. Don't forget the trailing nul.
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size_t UUID_STRING_LENGTH = 36 + thr_id_.length () + pid_.length ();
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char *buf = 0;
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if ((thr_id_.length () != 0) && (pid_.length () != 0))
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{
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UUID_STRING_LENGTH += 2; //for '-'
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ACE_NEW_RETURN (buf,
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char[UUID_STRING_LENGTH + 1],
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0);
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ACE_OS::sprintf (buf,
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"%8.8x-%4.4x-%4.4x-%2.2x%2.2x-%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x-%s-%s",
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this->time_low_,
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this->time_mid_,
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this->time_hi_and_version_,
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this->clock_seq_hi_and_reserved_,
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this->clock_seq_low_,
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(this->node_->node_ID ()) [0],
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(this->node_->node_ID ()) [1],
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(this->node_->node_ID ()) [2],
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(this->node_->node_ID ()) [3],
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(this->node_->node_ID ()) [4],
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(this->node_->node_ID ()) [5],
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thr_id_.c_str (),
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pid_.c_str ()
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);
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}
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else
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{
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ACE_NEW_RETURN (buf,
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char[UUID_STRING_LENGTH + 1],
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0);
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ACE_OS::sprintf (buf,
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"%8.8x-%4.4x-%4.4x-%2.2x%2.2x-%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x",
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this->time_low_,
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this->time_mid_,
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this->time_hi_and_version_,
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this->clock_seq_hi_and_reserved_,
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this->clock_seq_low_,
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(this->node_->node_ID ()) [0],
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(this->node_->node_ID ()) [1],
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(this->node_->node_ID ()) [2],
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(this->node_->node_ID ()) [3],
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(this->node_->node_ID ()) [4],
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(this->node_->node_ID ()) [5]
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);
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}
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// We allocated 'buf' above dynamically, so we shouldn't use
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// ACE_NEW_RETURN here to avoid a possible memory leak.
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ACE_NEW_NORETURN (this->as_string_,
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ACE_CString (buf, UUID_STRING_LENGTH));
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// we first free the dynamically allocated 'buf'.
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delete [] buf;
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// then we test that ACE_NEW succeded for 'as_string_'
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// if not, we return 0 (NULL) to indicate failure.
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if (this->as_string_ == 0 )
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return 0;
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}
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return as_string_;
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}
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void
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UUID::from_string_i (const ACE_CString& uuid_string)
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{
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if (uuid_string.length () < NIL_UUID.to_string ()->length ())
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{
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ACE_ERROR ((LM_ERROR,
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"%N ACE_UUID::from_string_i - "
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"IllegalArgument (incorrect string length)\n"));
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return;
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}
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/// Special case for the nil UUID.
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if (uuid_string == *NIL_UUID.to_string ())
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{
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bool copy_constructor_not_supported = false;
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ACE_ASSERT (copy_constructor_not_supported);
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//*this = NIL_UUID;
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ACE_UNUSED_ARG (copy_constructor_not_supported);
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return;
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}
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unsigned int time_low;
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unsigned int time_mid;
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unsigned int time_hi_and_version;
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unsigned int clock_seq_hi_and_reserved;
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unsigned int clock_seq_low;
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unsigned int node [UUID_Node::NODE_ID_SIZE];
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char thr_pid_buf [BUFSIZ];
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if (uuid_string.length () == NIL_UUID.to_string ()->length ())
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{
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// This might seem quite strange this being in ACE, but it
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// seems to be a bit difficult to write a facade for ::sscanf
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// because some compilers dont support vsscanf, including
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// MSVC. It appears that most platforms support sscanf though
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// so we need to use it directly.
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const int nScanned =
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#if defined (ACE_HAS_TR24731_2005_CRT)
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sscanf_s (
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#else
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::sscanf (
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#endif /* ACE_HAS_TR24731_2005_CRT */
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uuid_string.c_str (),
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"%8x-%4x-%4x-%2x%2x-%2x%2x%2x%2x%2x%2x",
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&time_low,
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&time_mid,
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&time_hi_and_version,
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&clock_seq_hi_and_reserved,
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&clock_seq_low,
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&node[0],
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&node[1],
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&node[2],
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&node[3],
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&node[4],
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&node[5]
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);
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if (nScanned != 11)
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{
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ACE_DEBUG ((LM_DEBUG,
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"UUID::from_string_i - "
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"IllegalArgument (invalid string representation)\n"));
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return;
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}
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}
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else
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{
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const int nScanned =
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#if defined (ACE_HAS_TR24731_2005_CRT)
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sscanf_s (uuid_string.c_str (),
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"%8x-%4x-%4x-%2x%2x-%2x%2x%2x%2x%2x%2x-%s",
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&time_low,
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&time_mid,
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&time_hi_and_version,
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&clock_seq_hi_and_reserved,
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&clock_seq_low,
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&node[0],
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&node[1],
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&node[2],
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&node[3],
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&node[4],
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&node[5],
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thr_pid_buf,
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BUFSIZ
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);
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#else
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::sscanf (uuid_string.c_str (),
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"%8x-%4x-%4x-%2x%2x-%2x%2x%2x%2x%2x%2x-%s",
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&time_low,
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&time_mid,
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&time_hi_and_version,
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&clock_seq_hi_and_reserved,
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&clock_seq_low,
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&node[0],
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&node[1],
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&node[2],
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&node[3],
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&node[4],
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&node[5],
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thr_pid_buf
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);
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#endif /* ACE_HAS_TR24731_2005_CRT */
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if (nScanned != 12)
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{
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ACE_DEBUG ((LM_DEBUG,
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"ACE_UUID::from_string_i - "
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"IllegalArgument (invalid string representation)\n"));
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return;
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}
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}
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this->time_low_ = static_cast<ACE_UINT32> (time_low);
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this->time_mid_ = static_cast<ACE_UINT16> (time_mid);
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this->time_hi_and_version_ = static_cast<ACE_UINT16> (time_hi_and_version);
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this->clock_seq_hi_and_reserved_ = static_cast<u_char> (clock_seq_hi_and_reserved);
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this->clock_seq_low_ = static_cast<u_char> (clock_seq_low);
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UUID_Node::Node_ID node_id;
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for (int i = 0; i < UUID_Node::NODE_ID_SIZE; ++i)
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node_id [i] = static_cast<u_char> (node[i]);
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this->node_->node_ID (node_id);
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// Support varient 10- only
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if ((this->clock_seq_hi_and_reserved_ & 0xc0) != 0x80 && (this->clock_seq_hi_and_reserved_ & 0xc0) != 0xc0)
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{
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ACE_DEBUG ((LM_DEBUG,
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"ACE_UUID::from_string_i - "
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"IllegalArgument (unsupported variant)\n"));
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return;
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}
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/// Support versions 1, 3, and 4 only
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ACE_UINT16 V1 = this->time_hi_and_version_;
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if ((V1 & 0xF000) != 0x1000 &&
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(V1 & 0xF000) != 0x3000 &&
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(V1 & 0xF000) != 0x4000)
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{
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ACE_DEBUG ((LM_DEBUG,
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"ACE_UUID::from_string_i - "
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"IllegalArgument (unsupported version)\n"));
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return;
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}
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if ((this->clock_seq_hi_and_reserved_ & 0xc0) == 0xc0)
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{
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if (uuid_string.length () == NIL_UUID.to_string ()->length ())
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{
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ACE_DEBUG ((LM_DEBUG,
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"ACE_UUID::from_string_i - "
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"IllegalArgument (Missing Thread and Process Id)\n"));
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return;
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}
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ACE_CString thr_pid_str (thr_pid_buf);
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ssize_t pos = static_cast<ssize_t> (thr_pid_str.find ('-'));
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if (pos == -1)
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ACE_DEBUG ((LM_DEBUG,
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"ACE_UUID::from_string_i - "
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"IllegalArgument (Thread and Process Id format incorrect)\n"));
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this->thr_id_ = thr_pid_str.substr (0, pos);
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this->pid_ = thr_pid_str.substr (pos+1, thr_pid_str.length ()-pos-1);
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}
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}
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UUID_Generator::UUID_Generator ()
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: time_last_ (0),
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destroy_lock_ (true)
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{
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ACE_NEW (lock_,
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ACE_SYNCH_MUTEX);
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}
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UUID_Generator::~UUID_Generator ()
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{
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if (destroy_lock_)
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delete lock_;
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}
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void
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UUID_Generator::init (void)
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{
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ACE_OS::macaddr_node_t macaddress;
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int result = ACE_OS::getmacaddress (&macaddress);
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UUID_Node::Node_ID node_id;
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if (result != -1)
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{
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// ACE_DEBUG ((LM_DEBUG,
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// "%02X-%02X-%02X-%02X-%02X-%02X\n",
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// macaddress.node [0],
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// macaddress.node [1],
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// macaddress.node [2],
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// macaddress.node [3],
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// macaddress.node [4],
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// macaddress.node [5]));
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ACE_OS::memcpy (&node_id,
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macaddress.node,
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sizeof (node_id));
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}
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else
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{
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node_id [0] = static_cast<u_char> (ACE_OS::rand ());
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node_id [1] = static_cast<u_char> (ACE_OS::rand ());
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node_id [2] = static_cast<u_char> (ACE_OS::rand ());
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node_id [3] = static_cast<u_char> (ACE_OS::rand ());
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node_id [4] = static_cast<u_char> (ACE_OS::rand ());
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node_id [5] = static_cast<u_char> (ACE_OS::rand ());
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}
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this->get_timestamp (time_last_);
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{
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ACE_GUARD (ACE_SYNCH_MUTEX, ace_mon, *lock_);
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uuid_state_.timestamp = time_last_;
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uuid_state_.node.node_ID (node_id);
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}
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}
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void
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UUID_Generator::generate_UUID (UUID& uuid,ACE_UINT16 version,
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u_char variant)
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{
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UUID_Time timestamp;
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ACE_UINT16 clock_sequence;
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this->get_timestamp_and_clocksequence (timestamp,
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clock_sequence);
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// Construct a Version 1 UUID with the information in the arguements.
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uuid.time_low (static_cast<ACE_UINT32> (timestamp & 0xFFFFFFFF));
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uuid.time_mid (static_cast<ACE_UINT16> ((timestamp >> 32) & 0xFFFF));
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ACE_UINT16 tHAV = static_cast<ACE_UINT16> ((timestamp >> 48) & 0xFFFF);
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tHAV |= (version << 12);
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uuid.time_hi_and_version (tHAV);
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u_char cseqHAV;
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uuid.clock_seq_low (static_cast<u_char> (clock_sequence & 0xFF));
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cseqHAV = static_cast<u_char> ((clock_sequence & 0x3f00) >> 8);
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uuid_state_.timestamp = timestamp;
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cseqHAV |= variant;
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uuid.clock_seq_hi_and_reserved (cseqHAV);
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uuid.node (& (uuid_state_.node));
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if (variant == 0xc0)
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{
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ACE_Thread_ID thread_id;
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char buf [BUFSIZ];
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thread_id.to_string (buf);
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uuid.thr_id (buf);
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ACE_OS::sprintf (buf,
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"%d",
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static_cast<int> (ACE_OS::getpid ()));
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uuid.pid (buf);
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}
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}
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UUID*
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UUID_Generator::generate_UUID (ACE_UINT16 version, u_char variant)
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{
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UUID* uuid;
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ACE_NEW_RETURN (uuid,
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UUID,
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0);
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this->generate_UUID (*uuid, version, variant);
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return uuid;
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}
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/// Obtain a new timestamp. If UUID's are being generated too quickly
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/// the clock sequence will be incremented
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void
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UUID_Generator::get_timestamp (UUID_Time& timestamp)
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{
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ACE_GUARD (ACE_SYNCH_MUTEX, mon, *lock_);
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this->get_systemtime (timestamp);
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// Account for the clock being set back. Increment the clock /
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// sequence.
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if (timestamp <= time_last_)
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{
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uuid_state_.clock_sequence = static_cast<ACE_UINT16>
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((uuid_state_.clock_sequence + 1) & ACE_UUID_CLOCK_SEQ_MASK);
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}
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// If the system time ticked since the last UUID was
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// generated. Set / the clock sequence back.
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else if (timestamp > time_last_)
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{
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uuid_state_.clock_sequence = 0;
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}
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time_last_ = timestamp;
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}
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void
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UUID_Generator::get_timestamp_and_clocksequence (UUID_Time& timestamp,
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ACE_UINT16& clock_sequence)
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{
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ACE_GUARD (ACE_SYNCH_MUTEX, mon, *lock_);
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this->get_systemtime (timestamp);
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// Account for the clock being set back. Increment the clock /
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// sequence.
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if (timestamp <= time_last_)
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uuid_state_.clock_sequence = static_cast<ACE_UINT16> ((uuid_state_.clock_sequence + 1) & ACE_UUID_CLOCK_SEQ_MASK);
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// If the system time ticked since the last UUID was
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// generated. Set / the clock sequence back.
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else if (timestamp > time_last_)
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uuid_state_.clock_sequence = 0;
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time_last_ = timestamp;
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clock_sequence = uuid_state_.clock_sequence;
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}
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/**
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* ACE_Time_Value is in POSIX time, seconds since Jan 1, 1970. UUIDs use
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* time in 100ns ticks since 15 October 1582. The difference is:
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* 15 Oct 1582 - 1 Jan 1600: 17 days in Oct, 30 in Nov, 31 in Dec +
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* 17 years and 4 leap days (1584, 88, 92 and 96)
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* 1 Jan 1600 - 1 Jan 1900: 3 centuries + 73 leap days ( 25 in 17th cent.
|
|
* and 24 each in 18th and 19th centuries)
|
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* 1 Jan 1900 - 1 Jan 1970: 70 years + 17 leap days.
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* This adds up, in days: (17+30+31+365*17+4)+ (365*300+73)+ (365*70+17) or
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|
* 122192928000000000U (0x1B21DD213814000) 100 ns ticks.
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|
*/
|
|
void
|
|
UUID_Generator::get_systemtime (UUID_Time & timestamp)
|
|
{
|
|
const UUID_Time timeOffset =
|
|
#if defined (ACE_LACKS_UNSIGNEDLONGLONG_T)
|
|
ACE_U_LongLong (ACE_INT64_LITERAL (0x1B21DD213814000));
|
|
#elif defined (ACE_LACKS_LONGLONG_T)
|
|
ACE_U_LongLong (0x13814000u, 0x1B21DD2u);
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|
#else
|
|
ACE_UINT64_LITERAL (0x1B21DD213814000);
|
|
#endif /* ACE_LACKS_UNSIGNEDLONGLONG_T */
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|
|
|
/// 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_;
|
|
}
|
|
|
|
void
|
|
UUID_Generator::lock (ACE_SYNCH_MUTEX* lock,
|
|
bool release_lock)
|
|
{
|
|
if (this->destroy_lock_)
|
|
delete this->lock_;
|
|
|
|
this->lock_ = lock;
|
|
this->destroy_lock_ = release_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
|