1 | namespace HeuristicLab.Problems.ProgramSynthesis.Push.Interpreter {
|
---|
2 | using System;
|
---|
3 | using System.Collections.Generic;
|
---|
4 | #if DEBUG
|
---|
5 | using System.Linq;
|
---|
6 | #endif
|
---|
7 | using System.Runtime.CompilerServices;
|
---|
8 | using System.Threading;
|
---|
9 | using System.Threading.Tasks;
|
---|
10 | using HeuristicLab.Core;
|
---|
11 | using HeuristicLab.Problems.ProgramSynthesis.Push.Configuration;
|
---|
12 | using HeuristicLab.Problems.ProgramSynthesis.Push.Data.Pool;
|
---|
13 | using HeuristicLab.Problems.ProgramSynthesis.Push.Expressions;
|
---|
14 | using HeuristicLab.Problems.ProgramSynthesis.Push.Parser;
|
---|
15 | using HeuristicLab.Problems.ProgramSynthesis.Push.Stack;
|
---|
16 | using HeuristicLab.Random;
|
---|
17 |
|
---|
18 | public class PushInterpreter : IPushInterpreter {
|
---|
19 | private Task currentTask;
|
---|
20 |
|
---|
21 | public PushInterpreter(IReadonlyPushConfiguration config = null, IRandom random = null) {
|
---|
22 | Random = random ?? new FastRandom();
|
---|
23 |
|
---|
24 | Configuration = config ?? new PushConfiguration();
|
---|
25 |
|
---|
26 | // setting the capacity of the stacks to max points ensures that there will be enough memory at runtime
|
---|
27 | ExecStack = new PushStack<Expression>(Configuration.EvalPushLimit);
|
---|
28 |
|
---|
29 | CodeStack = new PushStack<Expression>(Configuration.EvalPushLimit) {
|
---|
30 | IsEnabled = Configuration.IsCodeStackEnabled
|
---|
31 | };
|
---|
32 |
|
---|
33 | NameStack = new PushStack<string> {
|
---|
34 | IsEnabled = Configuration.IsNameStackEnabled
|
---|
35 | };
|
---|
36 | BooleanStack = new PushStack<bool> {
|
---|
37 | IsEnabled = Configuration.IsBooleanStackEnabled
|
---|
38 | };
|
---|
39 | IntegerStack = new PushStack<long> {
|
---|
40 | IsEnabled = Configuration.IsIntegerStackEnabled
|
---|
41 | };
|
---|
42 | FloatStack = new PushStack<double> {
|
---|
43 | IsEnabled = Configuration.IsFloatStackEnabled
|
---|
44 | };
|
---|
45 |
|
---|
46 | CustomExpressions = new Dictionary<string, Expression>();
|
---|
47 | }
|
---|
48 |
|
---|
49 | public PushInterpreter(int seed, IReadonlyPushConfiguration config = null)
|
---|
50 | : this(config, new FastRandom(seed)) {
|
---|
51 | }
|
---|
52 |
|
---|
53 | public IRandom Random { get; set; }
|
---|
54 |
|
---|
55 | public int ExecCounter { get; private set; }
|
---|
56 |
|
---|
57 | public bool IsPaused { get; private set; }
|
---|
58 |
|
---|
59 | public bool IsAborted { get; private set; }
|
---|
60 |
|
---|
61 | public bool IsRunning
|
---|
62 | {
|
---|
63 | get
|
---|
64 | {
|
---|
65 | return !ExecStack.IsEmpty &&
|
---|
66 | !IsPaused &&
|
---|
67 | !IsAborted &&
|
---|
68 | (ExecCounter < Configuration.EvalPushLimit);
|
---|
69 | }
|
---|
70 | }
|
---|
71 |
|
---|
72 | public bool IsCompleted
|
---|
73 | {
|
---|
74 | get
|
---|
75 | {
|
---|
76 | return ExecStack.Count == 0;
|
---|
77 | }
|
---|
78 | }
|
---|
79 |
|
---|
80 | public bool CanStep
|
---|
81 | {
|
---|
82 | get
|
---|
83 | {
|
---|
84 | return !IsCompleted && !IsAborted && IsPaused;
|
---|
85 | }
|
---|
86 | }
|
---|
87 |
|
---|
88 | public IManagedPool<PushProgram> PushProgramPool { get; set; }
|
---|
89 |
|
---|
90 | public IReadonlyPushConfiguration Configuration { get; protected set; }
|
---|
91 |
|
---|
92 | public IStack<Expression> CodeStack { get; private set; }
|
---|
93 |
|
---|
94 | public IStack<Expression> ExecStack { get; private set; }
|
---|
95 |
|
---|
96 | public IStack<string> NameStack { get; private set; }
|
---|
97 |
|
---|
98 | public IStack<bool> BooleanStack { get; private set; }
|
---|
99 |
|
---|
100 | public IStack<long> IntegerStack { get; private set; }
|
---|
101 |
|
---|
102 | public IStack<double> FloatStack { get; private set; }
|
---|
103 |
|
---|
104 | public IDictionary<string, Expression> CustomExpressions { get; private set; }
|
---|
105 |
|
---|
106 | public bool IsNameQuoteFlagSet { get; set; }
|
---|
107 |
|
---|
108 | public Task RunAsync(string code, bool stepwise = false, CancellationToken token = default(CancellationToken)) {
|
---|
109 | var program = PushParser.Parse(code);
|
---|
110 |
|
---|
111 | currentTask = RunAsync(program, stepwise, token);
|
---|
112 |
|
---|
113 | return currentTask;
|
---|
114 | }
|
---|
115 | public async Task RunAsync(
|
---|
116 | Expression expression,
|
---|
117 | bool stepwise = false,
|
---|
118 | CancellationToken token = default(CancellationToken)) {
|
---|
119 | await Task.Run(() => Run(expression, stepwise), token);
|
---|
120 | }
|
---|
121 |
|
---|
122 | public void Run(string code, bool stepwise = false) {
|
---|
123 | var program = PushParser.Parse(code);
|
---|
124 | Run(program, stepwise);
|
---|
125 | }
|
---|
126 |
|
---|
127 |
|
---|
128 | public void Run(Expression program, bool stepwise = false) {
|
---|
129 | IsPaused = stepwise;
|
---|
130 |
|
---|
131 | /* Push top expression so the loop is able to enter
|
---|
132 | * If the top expression is a single statement then the loop has nothing to do
|
---|
133 | * Otherwise the expand expression will be evaluated and pushes code onto the EXEC stack */
|
---|
134 | ExecStack.Push(program);
|
---|
135 |
|
---|
136 | if (Configuration.TopLevelPushCode) CodeStack.Insert(0, program);
|
---|
137 |
|
---|
138 | // run top expression
|
---|
139 | DoStep();
|
---|
140 |
|
---|
141 | Interpret();
|
---|
142 | }
|
---|
143 |
|
---|
144 | public async Task AbortAsync() {
|
---|
145 | if (IsAborted || IsCompleted) return;
|
---|
146 |
|
---|
147 | IsAborted = true;
|
---|
148 |
|
---|
149 | if (currentTask != null) await currentTask;
|
---|
150 | }
|
---|
151 |
|
---|
152 | public async Task AbortAndResetAsync() {
|
---|
153 | await AbortAsync();
|
---|
154 | Reset();
|
---|
155 | }
|
---|
156 |
|
---|
157 | public async Task PauseAsync() {
|
---|
158 | if (IsPaused || IsCompleted) return;
|
---|
159 |
|
---|
160 | IsPaused = true;
|
---|
161 |
|
---|
162 | if (currentTask != null) await currentTask;
|
---|
163 | }
|
---|
164 |
|
---|
165 | public async Task ResumeAsync() {
|
---|
166 | if (IsPaused || !IsAborted) {
|
---|
167 | IsPaused = false;
|
---|
168 | await InterpretAsync();
|
---|
169 | } else await currentTask;
|
---|
170 | }
|
---|
171 |
|
---|
172 | public void Resume() {
|
---|
173 | if (!IsPaused && IsAborted)
|
---|
174 | return;
|
---|
175 |
|
---|
176 | IsPaused = false;
|
---|
177 | Interpret();
|
---|
178 | }
|
---|
179 |
|
---|
180 | [MethodImpl(MethodImplOptions.AggressiveInlining)]
|
---|
181 | public bool Step() {
|
---|
182 | if (!CanStep) return false;
|
---|
183 |
|
---|
184 | var successful = DoStep();
|
---|
185 | Finally();
|
---|
186 |
|
---|
187 | return successful;
|
---|
188 | }
|
---|
189 |
|
---|
190 | [MethodImpl(MethodImplOptions.AggressiveInlining)]
|
---|
191 | public void Step(int count) {
|
---|
192 | for (var i = 0; i < count; i++) Step();
|
---|
193 | }
|
---|
194 |
|
---|
195 | public void PrintStacks() {
|
---|
196 | PrintStack("EXEC", ExecStack);
|
---|
197 | PrintStack("CODE", CodeStack);
|
---|
198 | PrintStack("NAME", NameStack);
|
---|
199 | PrintStack("BOOLEAN", BooleanStack);
|
---|
200 | PrintStack("FLOAT", FloatStack);
|
---|
201 | PrintStack("INTEGER", IntegerStack);
|
---|
202 |
|
---|
203 | if (CustomExpressions.Count == 0) return;
|
---|
204 | Console.WriteLine("--------- Custom Expressions ---------");
|
---|
205 | foreach (var ce in CustomExpressions) {
|
---|
206 | Console.WriteLine("{0}: {1}", ce.Key, ce.Value);
|
---|
207 | }
|
---|
208 | }
|
---|
209 |
|
---|
210 | /// <summary>
|
---|
211 | /// Clears stacks
|
---|
212 | /// </summary>
|
---|
213 | public void Reset() {
|
---|
214 | IsAborted = false;
|
---|
215 | IsPaused = false;
|
---|
216 | currentTask = null;
|
---|
217 |
|
---|
218 | Clear();
|
---|
219 | }
|
---|
220 |
|
---|
221 | /// <summary>
|
---|
222 | /// Clears stacks
|
---|
223 | /// </summary>
|
---|
224 | public void Clear() {
|
---|
225 | ExecCounter = 0;
|
---|
226 |
|
---|
227 | ExecStack.Clear();
|
---|
228 | CodeStack.Clear();
|
---|
229 |
|
---|
230 | NameStack.Clear();
|
---|
231 | BooleanStack.Clear();
|
---|
232 | IntegerStack.Clear();
|
---|
233 | FloatStack.Clear();
|
---|
234 |
|
---|
235 | CustomExpressions.Clear();
|
---|
236 | }
|
---|
237 |
|
---|
238 | [MethodImpl(MethodImplOptions.AggressiveInlining)]
|
---|
239 | private void Interpret() {
|
---|
240 | while (IsRunning) {
|
---|
241 | DoStep();
|
---|
242 | ExecCounter++;
|
---|
243 | }
|
---|
244 |
|
---|
245 | Finally();
|
---|
246 | }
|
---|
247 |
|
---|
248 | [MethodImpl(MethodImplOptions.AggressiveInlining)]
|
---|
249 | private void Finally() {
|
---|
250 | if (!IsCompleted)
|
---|
251 | return;
|
---|
252 |
|
---|
253 | if (Configuration.TopLevelPopCode && (CodeStack.Count > 0))
|
---|
254 | CodeStack.Pop();
|
---|
255 | }
|
---|
256 |
|
---|
257 | #if DEBUG
|
---|
258 | private Expression last;
|
---|
259 | private bool DoStep() {
|
---|
260 | var expression = ExecStack.Pop();
|
---|
261 |
|
---|
262 | if (ExecStack.Any(e => e == null)) {
|
---|
263 | throw new InvalidProgramException();
|
---|
264 | }
|
---|
265 |
|
---|
266 | var succ = expression.Eval(this);
|
---|
267 | last = expression;
|
---|
268 |
|
---|
269 | return succ;
|
---|
270 | }
|
---|
271 | #else
|
---|
272 | [MethodImpl(MethodImplOptions.AggressiveInlining)]
|
---|
273 | private bool DoStep() {
|
---|
274 | return ExecStack.Pop().Eval(this);
|
---|
275 | }
|
---|
276 | #endif
|
---|
277 |
|
---|
278 | private Task InterpretAsync() {
|
---|
279 | currentTask = Task.Run(() => Interpret());
|
---|
280 |
|
---|
281 | return currentTask;
|
---|
282 | }
|
---|
283 |
|
---|
284 | private void PrintStack<T>(string name, IStack<T> stack) {
|
---|
285 | if (stack.IsEmpty) return;
|
---|
286 | Console.WriteLine("--------- {0} ---------\n{1}\n", name, stack);
|
---|
287 | }
|
---|
288 | }
|
---|
289 | } |
---|