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added memory barriers
added memory barriers
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r80:4f20870d0816 v2
r80:4f20870d0816 v2
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ArrayTraits.cs
200 lines | 6.9 KiB | text/x-csharp | CSharpLexer
/ Implab / Parallels / ArrayTraits.cs
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cin
Added TraceContext support to array traits
 r41 using Implab.Diagnostics;
using System;
cin
implemented parallel map and foreach for arrays...
 r15 using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading;
namespace Implab.Parallels {
public static class ArrayTraits {
class ArrayIterator<TSrc> : DispatchPool<int> {
readonly Action<TSrc> m_action;
readonly TSrc[] m_source;
readonly Promise<int> m_promise = new Promise<int>();
cin
Added TraceContext support to array traits
 r41 readonly TraceContext m_traceContext;
cin
implemented parallel map and foreach for arrays...
 r15
int m_pending;
int m_next;
public ArrayIterator(TSrc[] source, Action<TSrc> action, int threads)
: base(threads) {
Debug.Assert(source != null);
Debug.Assert(action != null);
cin
Added TraceContext support to array traits
 r41 m_traceContext = TraceContext.Snapshot();
cin
implemented parallel map and foreach for arrays...
 r15 m_next = 0;
m_source = source;
m_pending = source.Length;
m_action = action;
cin
Refactoring of the IPromise<T> interface...
 r76 m_promise.Anyway(Dispose);
cin
implemented parallel map and foreach for arrays...
 r15
InitPool();
}
public Promise<int> Promise {
get {
return m_promise;
}
}
cin
Added TraceContext support to array traits
 r41 protected override void Worker() {
cin
Interactive tracing...
 r48 TraceContext.Fork(m_traceContext);
cin
Added TraceContext support to array traits
 r41 base.Worker();
}
cin
implemented parallel map and foreach for arrays...
 r15 protected override bool TryDequeue(out int unit) {
cin
sync
 r16 unit = Interlocked.Increment(ref m_next) - 1;
cin
major refactoring, added tasks support
 r75 return unit < m_source.Length;
cin
implemented parallel map and foreach for arrays...
 r15 }
protected override void InvokeUnit(int unit) {
try {
m_action(m_source[unit]);
cin
sync
 r16 var pending = Interlocked.Decrement(ref m_pending);
cin
implemented parallel map and foreach for arrays...
 r15 if (pending == 0)
m_promise.Resolve(m_source.Length);
} catch (Exception e) {
m_promise.Reject(e);
}
}
}
class ArrayMapper<TSrc, TDst>: DispatchPool<int> {
readonly Func<TSrc, TDst> m_transform;
readonly TSrc[] m_source;
readonly TDst[] m_dest;
readonly Promise<TDst[]> m_promise = new Promise<TDst[]>();
cin
Added TraceContext support to array traits
 r41 readonly TraceContext m_traceContext;
cin
implemented parallel map and foreach for arrays...
 r15
int m_pending;
int m_next;
public ArrayMapper(TSrc[] source, Func<TSrc, TDst> transform, int threads)
: base(threads) {
Debug.Assert (source != null);
Debug.Assert( transform != null);
m_next = 0;
m_source = source;
m_dest = new TDst[source.Length];
m_pending = source.Length;
m_transform = transform;
cin
Added TraceContext support to array traits
 r41 m_traceContext = TraceContext.Snapshot();
cin
implemented parallel map and foreach for arrays...
 r15
cin
Refactoring of the IPromise<T> interface...
 r76 m_promise.Anyway(Dispose);
cin
implemented parallel map and foreach for arrays...
 r15
InitPool();
}
public Promise<TDst[]> Promise {
get {
return m_promise;
}
}
cin
Added TraceContext support to array traits
 r41 protected override void Worker() {
cin
Interactive tracing...
 r48 TraceContext.Fork(m_traceContext);
cin
Added TraceContext support to array traits
 r41 base.Worker();
}
cin
implemented parallel map and foreach for arrays...
 r15 protected override bool TryDequeue(out int unit) {
cin
sync
 r16 unit = Interlocked.Increment(ref m_next) - 1;
return unit >= m_source.Length ? false : true;
cin
implemented parallel map and foreach for arrays...
 r15 }
protected override void InvokeUnit(int unit) {
try {
m_dest[unit] = m_transform(m_source[unit]);
cin
sync
 r16 var pending = Interlocked.Decrement(ref m_pending);
cin
implemented parallel map and foreach for arrays...
 r15 if (pending == 0)
m_promise.Resolve(m_dest);
} catch (Exception e) {
m_promise.Reject(e);
}
}
}
cin
small refactoring, cleanup.
 r30 public static IPromise<TDst[]> ParallelMap<TSrc, TDst> (this TSrc[] source, Func<TSrc,TDst> transform, int threads) {
cin
implemented parallel map and foreach for arrays...
 r15 if (source == null)
throw new ArgumentNullException("source");
if (transform == null)
throw new ArgumentNullException("transform");
var mapper = new ArrayMapper<TSrc, TDst>(source, transform, threads);
return mapper.Promise;
}
cin
small refactoring, cleanup.
 r30 public static IPromise<int> ParallelForEach<TSrc>(this TSrc[] source, Action<TSrc> action, int threads) {
cin
implemented parallel map and foreach for arrays...
 r15 if (source == null)
throw new ArgumentNullException("source");
if (action == null)
throw new ArgumentNullException("action");
var iter = new ArrayIterator<TSrc>(source, action, threads);
return iter.Promise;
}
cin
sync
 r16
cin
Refactoring of the IPromise<T> interface...
 r76 public static IPromise<TDst[]> ChainedMap<TSrc, TDst>(this TSrc[] source, ResultMapper<TSrc, IPromise<TDst>> transform, int threads) {
cin
sync
 r16 if (source == null)
throw new ArgumentNullException("source");
if (transform == null)
throw new ArgumentNullException("transform");
if (threads <= 0)
throw new ArgumentOutOfRangeException("Threads number must be greater then zero");
cin
fixed: StackOverflow in IPromiseBase.Then(handler)...
 r32 if (source.Length == 0)
return Promise<TDst[]>.ResultToPromise(new TDst[0]);
cin
sync
 r16 var promise = new Promise<TDst[]>();
var res = new TDst[source.Length];
var pending = source.Length;
cin
small refactoring, cleanup.
 r30
cin
added memory barriers
 r80 object locker = new object();
int slots = threads;
cin
sync
 r16
cin
major refactoring, added tasks support
 r75 // Analysis disable AccessToDisposedClosure
cin
sync
 r16 AsyncPool.InvokeNewThread(() => {
for (int i = 0; i < source.Length; i++) {
cin
Promise is rewritten to use interlocked operations instead of locks
 r19 if(promise.IsResolved)
cin
sync
 r16 break; // stop processing in case of error or cancellation
var idx = i;
cin
major refactoring, added tasks support
 r75
cin
added memory barriers
 r80 lock(locker) {
while(slots == 0)
Monitor.Wait(locker);
slots--;
}
cin
sync
 r16 try {
cin
added memory barriers
 r80 transform(source[i])
.Anyway(() => {
lock(locker) {
slots ++;
Monitor.Pulse(locker);
}
})
.Last(
x => {
res[idx] = x;
var left = Interlocked.Decrement(ref pending);
if (left == 0)
promise.Resolve(res);
},
e => promise.Reject(e)
);
cin
sync
 r16
} catch (Exception e) {
promise.Reject(e);
}
}
return 0;
});
cin
added memory barriers
 r80 return promise;
cin
sync
 r16 }
cin
fixed dispatch pool race condition
 r24
cin
implemented parallel map and foreach for arrays...
 r15 }
}