o changed to more generic implementation to reduce the code size
o changed name, OSD_ATOMIC_INLINE to EPICS_ATOMIC_INLINE o changed supported data types, unsigned removed and int added (per reveiw at codeathon) o added add/subtract functions (per reveiw at codeathon) o now presuming that __sync_synchronize available all gcc 4 mingw does not provide windows mem barrier) o consolodated on one implemention for Microsoft invarient of cmplr intrinisic or win32 by using macros to config a shared header file o improved doc in epicsAtomic.h o added overloaded c++ interface in namespace epics :: atomic to epicsAtomic.h o added epicsAtomicReadMemoryBarrier and epicsAtomicWriteMemoryBarrier interface to epicsAtomic.h o changed the implementation so that each of the functions can be individually specified for a particular compiler, os, or in the generic implementation (this is accomplished with macros) o modified the functional and performance test so that they are based on templates so we can easily support new data types o modified performance tests to repeat function calls and measure performance using a template
This commit is contained in:
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238
src/libCom/test/epicsAtomicTest.cpp
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238
src/libCom/test/epicsAtomicTest.cpp
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#include <stdlib.h>
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#include <assert.h>
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#include "epicsAtomic.h"
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#include "epicsTime.h"
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#include "epicsThread.h"
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#include "epicsUnitTest.h"
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#include "testMain.h"
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using namespace epics;
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using namespace atomic;
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template < class T >
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struct TestDataIncrDecr {
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T m_testValue;
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size_t m_testIterations;
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};
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template < class T >
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struct TestDataAddSub {
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T m_testValue;
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size_t m_testIterations;
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static const T delta = 17;
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};
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template < class T >
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static void incr ( void *arg )
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{
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TestDataIncrDecr < T > * const pTestData =
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reinterpret_cast < TestDataIncrDecr < T > * > ( arg );
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increment ( pTestData->m_testValue );
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increment ( pTestData->m_testIterations );
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}
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template < class T >
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static void decr ( void *arg )
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{
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TestDataIncrDecr < T > * const pTestData =
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reinterpret_cast < TestDataIncrDecr < T > * > ( arg );
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decrement ( pTestData->m_testValue );
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increment ( pTestData->m_testIterations );
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}
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template < class T >
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static void add ( void *arg )
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{
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TestDataAddSub < T > * const pTestData =
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reinterpret_cast < TestDataAddSub < T > * > ( arg );
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add ( pTestData->m_testValue, TestDataAddSub < T > :: delta );
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increment ( pTestData->m_testIterations );
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}
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template < class T >
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static void sub ( void *arg )
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{
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TestDataAddSub < T > * const pTestData =
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reinterpret_cast < TestDataAddSub < T > * > ( arg );
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subtract ( pTestData->m_testValue, TestDataAddSub < T > :: delta );
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increment ( pTestData->m_testIterations );
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}
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template < class T >
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struct TestDataCAS {
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T m_testValue;
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size_t m_testIterationsSet;
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size_t m_testIterationsNotSet;
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};
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int isModulo ( size_t N, size_t n )
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{
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return ( n % N ) == 0u;
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}
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template < class T >
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static T trueValue ();
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template < class T >
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static T falseValue ();
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// int
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template <>
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inline int trueValue < int > () { return 1; }
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template <>
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inline int falseValue < int > () { return 0; }
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// size_t
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template <>
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inline size_t trueValue < size_t > () { return 1u; }
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template <>
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inline size_t falseValue < size_t > () { return 0u; }
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// EpicsAtomicPtrT
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template <>
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inline EpicsAtomicPtrT trueValue < EpicsAtomicPtrT > ()
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{ static char c; return & c; }
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template <>
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inline EpicsAtomicPtrT falseValue < EpicsAtomicPtrT > ()
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{ return 0u; }
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template < class T >
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static void cas ( void *arg )
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{
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TestDataCAS < T > * const pTestData =
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reinterpret_cast < TestDataCAS < T > * > ( arg );
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/*
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* intentionally waste cpu and maximize
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* contention for the shared data
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*/
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increment ( pTestData->m_testIterationsNotSet );
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while ( ! compareAndSwap ( pTestData->m_testValue,
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falseValue < T > (),
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trueValue < T > () ) ) {
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}
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decrement ( pTestData->m_testIterationsNotSet );
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set ( pTestData->m_testValue, falseValue < T > () );
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increment ( pTestData->m_testIterationsSet );
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}
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template < class T >
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void testIncrDecr ()
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{
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static const size_t N = 100;
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static const T NT = static_cast < T > ( N );
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const unsigned int stackSize =
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epicsThreadGetStackSize ( epicsThreadStackSmall );
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TestDataIncrDecr < T > testData = { 0, N };
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set ( testData.m_testValue, NT );
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testOk ( get ( testData.m_testValue ) == NT,
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"set/get %u", testData.m_testValue );
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set ( testData.m_testIterations, 0u );
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testOk ( get ( testData.m_testIterations ) == 0u,
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"set/get %u", testData.m_testIterations );
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for ( size_t i = 0u; i < N; i++ ) {
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epicsThreadCreate ( "incr",
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50, stackSize, incr < T >, & testData );
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epicsThreadCreate ( "decr",
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50, stackSize, decr < T >, & testData );
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}
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while ( testData.m_testIterations < 2 * N ) {
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epicsThreadSleep ( 0.01 );
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}
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testOk ( get ( testData.m_testIterations ) == 2 * N,
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"incr/decr iterations %u",
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testData.m_testIterations );
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testOk ( get ( testData.m_testValue ) == NT,
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"incr/decr final value %u",
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testData.m_testValue );
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}
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template < class T >
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void testAddSub ()
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{
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static const size_t N = 100;
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static const T NDT = TestDataAddSub < T > :: delta *
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static_cast < T > ( N );
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const unsigned int stackSize =
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epicsThreadGetStackSize ( epicsThreadStackSmall );
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TestDataIncrDecr < T > testData = { 0, N };
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set ( testData.m_testValue, NDT );
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testOk ( get ( testData.m_testValue ) == NDT,
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"set/get %u", testData.m_testValue );
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set ( testData.m_testIterations, 0u );
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testOk ( get ( testData.m_testIterations ) == 0u,
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"set/get %u", testData.m_testIterations );
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for ( size_t i = 0u; i < N; i++ ) {
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epicsThreadCreate ( "add",
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50, stackSize, add < T >, & testData );
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epicsThreadCreate ( "sub",
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50, stackSize, sub < T >, & testData );
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}
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while ( testData.m_testIterations < 2 * N ) {
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epicsThreadSleep ( 0.01 );
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}
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testOk ( get ( testData.m_testIterations ) == 2 * N,
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"add/sub iterations %u",
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testData.m_testIterations );
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testOk ( get ( testData.m_testValue ) == NDT,
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"add/sub final value %u",
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testData.m_testValue );
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}
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template < class T >
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void testCAS ()
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{
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static const size_t N = 10;
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const unsigned int stackSize =
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epicsThreadGetStackSize ( epicsThreadStackSmall );
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TestDataCAS < T > testData = { 0, N, N };
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set ( testData.m_testIterationsSet, 0 );
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testOk ( get ( testData.m_testIterationsSet ) == 0u,
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"set/get %u", testData.m_testIterationsSet );
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set ( testData.m_testIterationsNotSet, 0 );
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testOk ( get ( testData.m_testIterationsNotSet ) == 0u,
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"set/get %u", testData.m_testIterationsNotSet );
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set ( testData.m_testValue, trueValue < T > () );
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testOk ( get ( testData.m_testValue ) == trueValue < T > (),
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"set/get a true value" );
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for ( size_t i = 0u; i < N; i++ ) {
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epicsThreadCreate ( "tns",
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50, stackSize, cas < T >, & testData );
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}
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set ( testData.m_testValue, falseValue < T > () );
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while ( testData.m_testIterationsSet < N ) {
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epicsThreadSleep ( 0.01 );
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}
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testOk ( get ( testData.m_testIterationsSet ) == N,
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"test and set iterations %u",
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testData.m_testIterationsSet );
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testOk ( get ( testData.m_testIterationsNotSet ) == 0u,
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"test and set not-set tracking = %u",
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testData.m_testIterationsNotSet );
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}
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MAIN ( osiAtomicTest )
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{
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testPlan ( 31 );
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testIncrDecr < int > ();
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testIncrDecr < size_t > ();
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testAddSub < int > ();
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testAddSub < size_t > ();
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testCAS < int > ();
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testCAS < size_t > ();
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testCAS < EpicsAtomicPtrT > ();
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return testDone ();
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}
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