should be it

external/duckdb/third_party/tpce-tool/main/WheelTime.cpp

@@ -0,0 +1,129 @@
+/*
+ * Legal Notice
+ *
+ * This document and associated source code (the "Work") is a part of a
+ * benchmark specification maintained by the TPC.
+ *
+ * The TPC reserves all right, title, and interest to the Work as provided
+ * under U.S. and international laws, including without limitation all patent
+ * and trademark rights therein.
+ *
+ * No Warranty
+ *
+ * 1.1 TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE INFORMATION
+ *     CONTAINED HEREIN IS PROVIDED "AS IS" AND WITH ALL FAULTS, AND THE
+ *     AUTHORS AND DEVELOPERS OF THE WORK HEREBY DISCLAIM ALL OTHER
+ *     WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
+ *     INCLUDING, BUT NOT LIMITED TO, ANY (IF ANY) IMPLIED WARRANTIES,
+ *     DUTIES OR CONDITIONS OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
+ *     PURPOSE, OF ACCURACY OR COMPLETENESS OF RESPONSES, OF RESULTS, OF
+ *     WORKMANLIKE EFFORT, OF LACK OF VIRUSES, AND OF LACK OF NEGLIGENCE.
+ *     ALSO, THERE IS NO WARRANTY OR CONDITION OF TITLE, QUIET ENJOYMENT,
+ *     QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT
+ *     WITH REGARD TO THE WORK.
+ * 1.2 IN NO EVENT WILL ANY AUTHOR OR DEVELOPER OF THE WORK BE LIABLE TO
+ *     ANY OTHER PARTY FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO THE
+ *     COST OF PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS
+ *     OF USE, LOSS OF DATA, OR ANY INCIDENTAL, CONSEQUENTIAL, DIRECT,
+ *     INDIRECT, OR SPECIAL DAMAGES WHETHER UNDER CONTRACT, TORT, WARRANTY,
+ *     OR OTHERWISE, ARISING IN ANY WAY OUT OF THIS OR ANY OTHER AGREEMENT
+ *     RELATING TO THE WORK, WHETHER OR NOT SUCH AUTHOR OR DEVELOPER HAD
+ *     ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ * Contributors
+ * - Doug Johnson
+ */
+
+/******************************************************************************
+ *   Description:        Implementation of the CWheelTime class.
+ *                       See WheelTime.h for a high level description.
+ ******************************************************************************/
+
+#include "main/WheelTime.h"
+
+using namespace TPCE;
+
+CWheelTime::CWheelTime(PWheelConfig pWheelConfig) : m_pWheelConfig(pWheelConfig), m_Cycles(0), m_Index(0) {
+}
+
+CWheelTime::CWheelTime(PWheelConfig pWheelConfig, INT32 cycles, INT32 index)
+    : m_pWheelConfig(pWheelConfig), m_Cycles(cycles), m_Index(index) {
+}
+
+CWheelTime::CWheelTime(PWheelConfig pWheelConfig, CDateTime &Base, CDateTime &Now, INT32 offset)
+    : m_pWheelConfig(pWheelConfig) {
+	Set(Base, Now);
+	Add(offset);
+}
+
+CWheelTime::~CWheelTime(void) {
+}
+
+void CWheelTime::Add(INT32 Interval) {
+	// DJ - should throw error if Interval >= m_pWheelConfig->WheelSize?
+	m_Cycles += Interval / m_pWheelConfig->WheelSize;
+	m_Index += Interval % m_pWheelConfig->WheelSize;
+	if (m_Index >= m_pWheelConfig->WheelSize) {
+		// Handle wrapping in the wheel - assume we don't allow multi-cycle
+		// intervals
+		m_Cycles++;
+		m_Index -= m_pWheelConfig->WheelSize;
+	}
+}
+
+INT32 CWheelTime::Offset(const CWheelTime &Time) {
+	INT32 Interval;
+
+	Interval = (m_Cycles - Time.m_Cycles) * m_pWheelConfig->WheelSize;
+	Interval += (m_Index - Time.m_Index);
+	return (Interval);
+}
+
+void CWheelTime::Set(INT32 cycles, INT32 index) {
+	m_Cycles = cycles;
+	m_Index = index; // DJ - should throw error if Index >= m_pWheelConfig->WheelSize
+}
+
+// Set is overloaded. This version is used by the timer wheel.
+void CWheelTime::Set(CDateTime &Base, CDateTime &Now) {
+	INT32 offset; // offset from BaseTime in milliseconds
+
+	// DJ - If Now < Base, then we should probably throw an exception
+
+	offset = Now.DiffInMilliSeconds(Base) / m_pWheelConfig->WheelResolution; // convert based on wheel resolution
+	m_Cycles = offset / m_pWheelConfig->WheelSize;
+	m_Index = offset % m_pWheelConfig->WheelSize;
+}
+
+// Set is overloaded. This version is used by the event wheel.
+void CWheelTime::Set(CDateTime *pBase, CDateTime *pNow) {
+	INT32 offset; // offset from BaseTime in milliseconds
+
+	// DJ - If Now < Base, then we should probably throw an exception
+
+	offset = pNow->DiffInMilliSeconds(pBase) / m_pWheelConfig->WheelResolution; // convert based on wheel resolution
+	m_Cycles = offset / m_pWheelConfig->WheelSize;
+	m_Index = offset % m_pWheelConfig->WheelSize;
+}
+
+bool CWheelTime::operator<(const CWheelTime &Time) {
+	return (m_Cycles == Time.m_Cycles) ? (m_Index < Time.m_Index) : (m_Cycles < Time.m_Cycles);
+}
+
+CWheelTime &CWheelTime::operator=(const CWheelTime &Time) {
+	m_pWheelConfig = Time.m_pWheelConfig;
+	m_Cycles = Time.m_Cycles;
+	m_Index = Time.m_Index;
+
+	return *this;
+}
+
+CWheelTime &CWheelTime::operator+=(const INT32 &Interval) {
+	Add(Interval);
+	return *this;
+}
+
+CWheelTime CWheelTime::operator++(INT32) {
+	Add(1);
+	return *this;
+}