scirs2_core/array_protocol/
jit_impl.rs

1// Copyright (c) 2025, `SciRS2` Team
2//
3// Licensed under either of
4//
5// * Apache License, Version 2.0
6//   (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
7// * MIT license
8//   (LICENSE-MIT or http://opensource.org/licenses/MIT)
9//
10// at your option.
11//
12
13//! Just-In-Time (JIT) compilation support for array operations.
14//!
15//! This module provides functionality for JIT-compiling operations on arrays,
16//! allowing for faster execution of custom operations.
17
18use std::any::{Any, TypeId};
19use std::collections::HashMap;
20use std::fmt::Debug;
21use std::marker::PhantomData;
22use std::sync::{Arc, LazyLock, RwLock};
23
24use crate::array_protocol::{ArrayProtocol, JITArray, JITFunction, JITFunctionFactory};
25use crate::error::{CoreError, CoreResult, ErrorContext};
26
27/// JIT compilation backends
28#[derive(Debug, Clone, Copy, PartialEq, Eq)]
29pub enum JITBackend {
30    /// LLVM backend
31    LLVM,
32
33    /// Cranelift backend
34    Cranelift,
35
36    /// WebAssembly backend
37    WASM,
38
39    /// Custom backend
40    Custom(TypeId),
41}
42
43impl Default for JITBackend {
44    fn default() -> Self {
45        Self::LLVM
46    }
47}
48
49/// Configuration for JIT compilation
50#[derive(Debug, Clone)]
51pub struct JITConfig {
52    /// The JIT backend to use
53    pub backend: JITBackend,
54
55    /// Whether to optimize the generated code
56    pub optimize: bool,
57
58    /// Optimization level (0-3)
59    pub opt_level: usize,
60
61    /// Whether to cache compiled functions
62    pub use_cache: bool,
63
64    /// Additional backend-specific options
65    pub backend_options: HashMap<String, String>,
66}
67
68impl Default for JITConfig {
69    fn default() -> Self {
70        Self {
71            backend: JITBackend::default(),
72            optimize: true,
73            opt_level: 2,
74            use_cache: true,
75            backend_options: HashMap::new(),
76        }
77    }
78}
79
80/// Type alias for the complex function type
81pub type JITFunctionType = dyn Fn(&[Box<dyn Any>]) -> CoreResult<Box<dyn Any>> + Send + Sync;
82
83/// A compiled JIT function
84pub struct JITFunctionImpl {
85    /// The source code of the function
86    source: String,
87
88    /// The compiled function
89    function: Box<JITFunctionType>,
90
91    /// Information about the compilation
92    compile_info: HashMap<String, String>,
93}
94
95impl Debug for JITFunctionImpl {
96    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
97        f.debug_struct("JITFunctionImpl")
98            .field("source", &self.source)
99            .field("compile_info", &self.compile_info)
100            .finish_non_exhaustive()
101    }
102}
103
104impl JITFunctionImpl {
105    /// Create a new JIT function.
106    #[must_use]
107    pub fn new(
108        source: String,
109        function: Box<JITFunctionType>,
110        compile_info: HashMap<String, String>,
111    ) -> Self {
112        Self {
113            source,
114            function,
115            compile_info,
116        }
117    }
118}
119
120impl JITFunction for JITFunctionImpl {
121    fn evaluate(&self, args: &[Box<dyn Any>]) -> CoreResult<Box<dyn Any>> {
122        (self.function)(args)
123    }
124
125    fn source(&self) -> String {
126        self.source.clone()
127    }
128
129    fn compile_info(&self) -> HashMap<String, String> {
130        self.compile_info.clone()
131    }
132
133    fn clone_box(&self) -> Box<dyn JITFunction> {
134        // Create a new JITFunctionImpl with a fresh function that behaves the same way
135        let source = self.source.clone();
136        let compile_info = self.compile_info.clone();
137
138        // Create a dummy function that returns a constant value
139        // In a real implementation, this would properly clone the behavior
140        let cloned_function: Box<JITFunctionType> = Box::new(move |_args| {
141            // Return a dummy result (42.0) as an example
142            Ok(Box::new(42.0))
143        });
144
145        Box::new(Self {
146            source,
147            function: cloned_function,
148            compile_info,
149        })
150    }
151}
152
153/// A factory for creating JIT functions using the LLVM backend
154pub struct LLVMFunctionFactory {
155    /// Configuration for JIT compilation
156    config: JITConfig,
157
158    /// Cache of compiled functions
159    cache: HashMap<String, Arc<dyn JITFunction>>,
160}
161
162impl LLVMFunctionFactory {
163    /// Create a new LLVM function factory.
164    pub fn new(config: JITConfig) -> Self {
165        Self {
166            config,
167            cache: HashMap::new(),
168        }
169    }
170
171    /// Compile a function using LLVM.
172    fn compile(&self, expression: &str, array_type_id: TypeId) -> CoreResult<Arc<dyn JITFunction>> {
173        // In a real implementation, this would use LLVM to compile the function
174        // For now, we'll just create a placeholder function
175
176        // Create some compile info
177        let mut compile_info = HashMap::new();
178        compile_info.insert("backend".to_string(), "LLVM".to_string());
179        compile_info.insert("opt_level".to_string(), self.config.opt_level.to_string());
180        compile_info.insert("array_type".to_string(), format!("{array_type_id:?}"));
181
182        // Create a function that just returns a constant value
183        // In a real implementation, this would be a compiled function
184        let source = expression.to_string();
185        let function: Box<JITFunctionType> = Box::new(move |_args| {
186            // Mock function just returns a constant value
187            Ok(Box::new(42.0))
188        });
189
190        // Create the JIT function
191        let jit_function = JITFunctionImpl::new(source, function, compile_info);
192
193        Ok(Arc::new(jit_function))
194    }
195}
196
197impl JITFunctionFactory for LLVMFunctionFactory {
198    fn create(&self, expression: &str, array_type_id: TypeId) -> CoreResult<Box<dyn JITFunction>> {
199        // Check if the function is already in the cache
200        if self.config.use_cache {
201            let cache_key = format!("{expression}-{array_type_id:?}");
202            if let Some(cached_fn) = self.cache.get(&cache_key) {
203                return Ok(cached_fn.as_ref().clone_box());
204            }
205        }
206
207        // Compile the function
208        let jit_function = self.compile(expression, array_type_id)?;
209
210        if self.config.use_cache {
211            // Add the function to the cache
212            let cache_key = format!("{expression}-{array_type_id:?}");
213            // In a real implementation, we'd need to handle this in a thread-safe way
214            // For now, we'll just clone the function
215            let mut cache = self.cache.clone();
216            cache.insert(cache_key, jit_function.clone());
217        }
218
219        // Clone the function and return it
220        Ok(jit_function.as_ref().clone_box())
221    }
222
223    fn supports_array_type(&self, _array_type_id: TypeId) -> bool {
224        // For simplicity, we'll say this factory supports all array types
225        true
226    }
227}
228
229/// A factory for creating JIT functions using the Cranelift backend
230pub struct CraneliftFunctionFactory {
231    /// Configuration for JIT compilation
232    config: JITConfig,
233
234    /// Cache of compiled functions
235    cache: HashMap<String, Arc<dyn JITFunction>>,
236}
237
238impl CraneliftFunctionFactory {
239    /// Create a new Cranelift function factory.
240    pub fn new(config: JITConfig) -> Self {
241        Self {
242            config,
243            cache: HashMap::new(),
244        }
245    }
246
247    /// Compile a function using Cranelift.
248    fn compile(&self, expression: &str, array_type_id: TypeId) -> CoreResult<Arc<dyn JITFunction>> {
249        // In a real implementation, this would use Cranelift to compile the function
250        // For now, we'll just create a placeholder function
251
252        // Create some compile info
253        let mut compile_info = HashMap::new();
254        compile_info.insert("backend".to_string(), "Cranelift".to_string());
255        compile_info.insert("opt_level".to_string(), self.config.opt_level.to_string());
256        compile_info.insert("array_type".to_string(), format!("{array_type_id:?}"));
257
258        // Create a function that just returns a constant value
259        // In a real implementation, this would be a compiled function
260        let source = expression.to_string();
261        let function: Box<JITFunctionType> = Box::new(move |_args| {
262            // Mock function just returns a constant value
263            Ok(Box::new(42.0))
264        });
265
266        // Create the JIT function
267        let jit_function = JITFunctionImpl::new(source, function, compile_info);
268
269        Ok(Arc::new(jit_function))
270    }
271}
272
273impl JITFunctionFactory for CraneliftFunctionFactory {
274    fn create(&self, expression: &str, array_type_id: TypeId) -> CoreResult<Box<dyn JITFunction>> {
275        // Check if the function is already in the cache
276        if self.config.use_cache {
277            let cache_key = format!("{expression}-{array_type_id:?}");
278            if let Some(cached_fn) = self.cache.get(&cache_key) {
279                return Ok(cached_fn.as_ref().clone_box());
280            }
281        }
282
283        // Compile the function
284        let jit_function = self.compile(expression, array_type_id)?;
285
286        if self.config.use_cache {
287            // Add the function to the cache
288            let cache_key = format!("{expression}-{array_type_id:?}");
289            // In a real implementation, we'd need to handle this in a thread-safe way
290            // For now, we'll just clone the function
291            let mut cache = self.cache.clone();
292            cache.insert(cache_key, jit_function.clone());
293        }
294
295        // Clone the function and return it
296        Ok(jit_function.as_ref().clone_box())
297    }
298
299    fn supports_array_type(&self, _array_type_id: TypeId) -> bool {
300        // For simplicity, we'll say this factory supports all array types
301        true
302    }
303}
304
305/// A JIT manager that selects the appropriate factory for a given array type
306pub struct JITManager {
307    /// The available JIT function factories
308    factories: Vec<Box<dyn JITFunctionFactory>>,
309
310    /// Default configuration for JIT compilation
311    default_config: JITConfig,
312}
313
314impl JITManager {
315    /// Create a new JIT manager.
316    pub fn new(default_config: JITConfig) -> Self {
317        Self {
318            factories: Vec::new(),
319            default_config,
320        }
321    }
322
323    /// Register a JIT function factory.
324    pub fn register_factory(&mut self, factory: Box<dyn JITFunctionFactory>) {
325        self.factories.push(factory);
326    }
327
328    /// Get a JIT function factory that supports the given array type.
329    pub fn get_factory_for_array_type(
330        &self,
331        array_type_id: TypeId,
332    ) -> Option<&dyn JITFunctionFactory> {
333        for factory in &self.factories {
334            if factory.supports_array_type(array_type_id) {
335                return Some(&**factory);
336            }
337        }
338        None
339    }
340
341    /// Compile a JIT function for the given expression and array type.
342    pub fn compile(
343        &self,
344        expression: &str,
345        array_type_id: TypeId,
346    ) -> CoreResult<Box<dyn JITFunction>> {
347        // Find a factory that supports the array type
348        if let Some(factory) = self.get_factory_for_array_type(array_type_id) {
349            factory.create(expression, array_type_id)
350        } else {
351            Err(CoreError::JITError(ErrorContext::new(format!(
352                "No JIT factory supports array type: {:?}",
353                array_type_id
354            ))))
355        }
356    }
357
358    /// Initialize the JIT manager with default factories.
359    pub fn initialize(&mut self) {
360        // Create and register the default factories
361        let llvm_config = JITConfig {
362            backend: JITBackend::LLVM,
363            ..self.default_config.clone()
364        };
365        let llvm_factory = Box::new(LLVMFunctionFactory::new(llvm_config));
366
367        let cranelift_config = JITConfig {
368            backend: JITBackend::Cranelift,
369            ..self.default_config.clone()
370        };
371        let cranelift_factory = Box::new(CraneliftFunctionFactory::new(cranelift_config));
372
373        self.register_factory(llvm_factory);
374        self.register_factory(cranelift_factory);
375    }
376
377    /// Get the global JIT manager instance.
378    #[must_use]
379    pub fn global() -> &'static RwLock<Self> {
380        static INSTANCE: LazyLock<RwLock<JITManager>> = LazyLock::new(|| {
381            RwLock::new(JITManager {
382                factories: Vec::new(),
383                default_config: JITConfig {
384                    backend: JITBackend::LLVM,
385                    optimize: true,
386                    opt_level: 2,
387                    use_cache: true,
388                    backend_options: HashMap::new(),
389                },
390            })
391        });
392        &INSTANCE
393    }
394}
395
396/// An array that supports JIT compilation
397pub struct JITEnabledArray<T, A> {
398    /// The underlying array
399    inner: A,
400
401    /// Phantom data for the element type
402    _phantom: PhantomData<T>,
403}
404
405impl<T, A> JITEnabledArray<T, A> {
406    /// Create a new JIT-enabled array.
407    pub fn new(inner: A) -> Self {
408        Self {
409            inner,
410            _phantom: PhantomData,
411        }
412    }
413
414    /// Get a reference to the inner array.
415    pub const fn inner(&self) -> &A {
416        &self.inner
417    }
418}
419
420impl<T, A: Clone> Clone for JITEnabledArray<T, A> {
421    fn clone(&self) -> Self {
422        Self {
423            inner: self.inner.clone(),
424            _phantom: PhantomData::<T>,
425        }
426    }
427}
428
429impl<T, A> JITArray for JITEnabledArray<T, A>
430where
431    T: Send + Sync + 'static,
432    A: ArrayProtocol + Clone + Send + Sync + 'static,
433{
434    fn compile(&self, expression: &str) -> CoreResult<Box<dyn JITFunction>> {
435        // Get the JIT manager
436        let jit_manager = JITManager::global();
437        let jit_manager = jit_manager.read().unwrap();
438
439        // Compile the function
440        jit_manager.compile(expression, TypeId::of::<A>())
441    }
442
443    fn supports_jit(&self) -> bool {
444        // Check if there's a factory that supports this array type
445        let jit_manager = JITManager::global();
446        let jit_manager = jit_manager.read().unwrap();
447
448        jit_manager
449            .get_factory_for_array_type(TypeId::of::<A>())
450            .is_some()
451    }
452
453    fn jit_info(&self) -> HashMap<String, String> {
454        let mut info = HashMap::new();
455
456        // Check if JIT is supported
457        let supported = self.supports_jit();
458        info.insert("supports_jit".to_string(), supported.to_string());
459
460        if supported {
461            // Get the JIT manager
462            let jit_manager = JITManager::global();
463            let jit_manager = jit_manager.read().unwrap();
464
465            // Get the factory
466            if jit_manager
467                .get_factory_for_array_type(TypeId::of::<A>())
468                .is_some()
469            {
470                // Get the factory's info
471                info.insert("factory".to_string(), "JIT factory available".to_string());
472            }
473        }
474
475        info
476    }
477}
478
479impl<T, A> ArrayProtocol for JITEnabledArray<T, A>
480where
481    T: Send + Sync + 'static,
482    A: ArrayProtocol + Clone + Send + Sync + 'static,
483{
484    fn array_function(
485        &self,
486        func: &crate::array_protocol::ArrayFunction,
487        types: &[TypeId],
488        args: &[Box<dyn Any>],
489        kwargs: &HashMap<String, Box<dyn Any>>,
490    ) -> Result<Box<dyn Any>, crate::array_protocol::NotImplemented> {
491        // For now, just delegate to the inner array
492        self.inner.array_function(func, types, args, kwargs)
493    }
494
495    fn as_any(&self) -> &dyn Any {
496        self
497    }
498
499    fn shape(&self) -> &[usize] {
500        self.inner.shape()
501    }
502
503    fn dtype(&self) -> TypeId {
504        self.inner.dtype()
505    }
506
507    fn box_clone(&self) -> Box<dyn ArrayProtocol> {
508        // Clone the inner array directly
509        let inner_clone = self.inner.clone();
510        Box::new(Self {
511            inner: inner_clone,
512            _phantom: PhantomData::<T>,
513        })
514    }
515}
516
517#[cfg(test)]
518mod tests {
519    use super::*;
520    use crate::array_protocol::NdarrayWrapper;
521    use ndarray::Array2;
522
523    #[test]
524    fn test_jit_function_creation() {
525        // Create a JIT function factory
526        let config = JITConfig {
527            backend: JITBackend::LLVM,
528            ..Default::default()
529        };
530        let factory = LLVMFunctionFactory::new(config);
531
532        // Create a simple expression
533        let expression = "x + y";
534
535        // Compile the function
536        let array_type_id = TypeId::of::<NdarrayWrapper<f64, ndarray::Ix2>>();
537        let jit_function = factory.create(expression, array_type_id).unwrap();
538
539        // Check the function's properties
540        assert_eq!(jit_function.source(), expression);
541        let compile_info = jit_function.compile_info();
542        assert_eq!(compile_info.get("backend").unwrap(), "LLVM");
543    }
544
545    #[test]
546    fn test_jit_manager() {
547        // Initialize the JIT manager
548        let mut jit_manager = JITManager::new(JITConfig::default());
549        jit_manager.initialize();
550
551        // Check that the factories were registered
552        let array_type_id = TypeId::of::<NdarrayWrapper<f64, ndarray::Ix2>>();
553        assert!(jit_manager
554            .get_factory_for_array_type(array_type_id)
555            .is_some());
556
557        // Compile a function
558        let expression = "x + y";
559        let jit_function = jit_manager.compile(expression, array_type_id).unwrap();
560
561        // Check the function's properties
562        assert_eq!(jit_function.source(), expression);
563    }
564
565    #[test]
566    fn test_jit_enabled_array() {
567        // Create an ndarray
568        let array = Array2::<f64>::ones((10, 5));
569        let wrapped = NdarrayWrapper::new(array);
570
571        // Create a JIT-enabled array
572        let jit_array: JITEnabledArray<f64, _> = JITEnabledArray::new(wrapped);
573
574        // Initialize the JIT manager
575        {
576            let mut jit_manager = JITManager::global().write().unwrap();
577            jit_manager.initialize();
578        }
579
580        // Check if JIT is supported
581        assert!(jit_array.supports_jit());
582
583        // Compile a function
584        let expression = "x + y";
585        let jit_function = jit_array.compile(expression).unwrap();
586
587        // Check the function's properties
588        assert_eq!(jit_function.source(), expression);
589    }
590}
scirs2_core/array_protocol/jit_impl.rs

scirs2_core/array_protocol/
jit_impl.rs
