amberjs 1.17.0

// Rust Native Optimizations
// Provides zero-copy optimizations and performance enhancements for Rust-Amber integration

use anyhow::{anyhow, Result};
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::sync::Arc;
use tokio::sync::RwLock;

/// Shared memory region for zero-copy operations
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SharedMemoryRegion {
    pub id: String,
    pub address: usize,
    pub size: usize,
    pub ref_count: Arc<RwLock<u32>>,
}
/// Zero-copy memory bridge
#[derive(Debug)]
pub struct ZeroCopyBridge {
    shared_memory: Arc<RwLock<HashMap<String, SharedMemoryRegion>>>,
    memory_pool: Arc<MemoryPool>,
}
/// Memory pool for efficient allocation
#[derive(Debug)]
pub struct MemoryPool {
    pool: Arc<RwLock<Vec<u8>>>,
    block_size: usize,
    max_blocks: usize,
}
/// Optimized code representation
#[derive(Debug, Clone)]
pub struct OptimizedCode {
    pub original: String,
    pub optimized: String,
    pub performance_gain: f64,
}
/// JIT compiler for hot path optimization
#[derive(Debug)]
pub struct JITCompiler {
    cache: Arc<RwLock<HashMap<String, OptimizedCode>>>,
    hot_paths: Arc<RwLock<Vec<String>>>,
}
/// Inline cache for fast lookups
#[derive(Debug)]
pub struct InlineCache {
    cache: Arc<RwLock<HashMap<String, CacheEntry>>>,
}
/// Cache entry for inline cache
#[derive(Debug, Clone)]
struct CacheEntry {
    value: String,
    hit_count: u64,
    last_access: std::time::SystemTime,
}
/// Performance profiler
#[derive(Debug)]
pub struct RustOptimizer {
    jit_compiler: Arc<JITCompiler>,
    inline_cache: Arc<InlineCache>,
    zero_copy: Arc<ZeroCopyBridge>,
}
impl SharedMemoryRegion {
    /// Create a new shared memory region
    pub fn new(id: String, size: usize) -> Self {
        SharedMemoryRegion {
            id,
            address: 0, // In real implementation, would allocate actual memory
            size,
            ref_count: Arc::new(RwLock::new(1)),
        }
    }
    /// Increment reference count
    pub async fn inc_ref(&self) -> Result<()> {
        let mut count = self.ref_count.write().await;
        *count += 1;
        Ok(())
    }
    /// Decrement reference count
    pub async fn dec_ref(&self) -> Result<()> {
        let mut count = self.ref_count.write().await;
        if *count > 0 {
            *count -= 1;
        }
        Ok(())
    }
    /// Get reference count
    pub async fn get_ref(&self) -> Result<u32> {
        let count: _ = self.ref_count.read().await;
        Ok(*count)
    }
}
impl MemoryPool {
    /// Create a new memory pool
    pub fn new(block_size: usize, max_blocks: usize) -> Self {
        MemoryPool {
            pool: Arc::new(RwLock::new(Vec::with_capacity(block_size * max_blocks))),
            block_size,
            max_blocks,
        }
    }
    /// Allocate a block from the pool
    pub async fn allocate(&self, size: usize) -> Result<Vec<u8>> {
        if size > self.block_size {
            return Err(anyhow!("Size exceeds block size"));
        }
        let mut pool = self.pool.write().await;
        // In real implementation, would check available blocks
        // For now, just return a zeroed vector
        Ok(vec![0; size])
    }
    /// Deallocate a block back to the pool
    pub async fn deallocate(&self, _data: Vec<u8>) -> Result<()> {
        // In real implementation, would return block to pool
        Ok(())
    }
}
impl ZeroCopyBridge {
    /// Create a new zero-copy bridge
    pub fn new(memory_pool: Arc<MemoryPool>) -> Self {
        ZeroCopyBridge {
            shared_memory: Arc::new(RwLock::new(HashMap::new())),
            memory_pool,
        }
    }
    /// Share memory region between languages
    pub async fn share_memory(&self, data: &[u8]) -> Result<SharedMemoryRegion> {
        let id: _ = format!("mem_{}", uuid::Uuid::new_v4());
        let region: _ = SharedMemoryRegion::new(id.clone(), data.len());
        let mut map = self.shared_memory.write().await;
        map.insert(id, region.clone());
        Ok(region)
    }
    /// Get shared memory region
    pub async fn get_memory(&self, id: &str) -> Result<SharedMemoryRegion> {
        let map: _ = self.shared_memory.read().await;
        map.get(id)
            .cloned()
            .ok_or_else(|| anyhow!("Memory region not found"))
    }
    /// Release shared memory region
    pub async fn release_memory(&self, id: &str) -> Result<()> {
        let mut map = self.shared_memory.write().await;
        map.remove(id);
        Ok(())
    }
    /// Fast path call with zero-copy arguments
    pub async fn fast_path_call(&self, target: &str, args: &[u8]) -> Result<Vec<u8>> {
        // In real implementation, would use shared memory for zero-copy
        // For now, simulate fast path
        tokio::time::sleep(tokio::time::Duration::from_nanos(1)).await;
        Ok(format!("Fast path result for {}", target).into_bytes())
    }
}
impl JITCompiler {
    /// Create a new JIT compiler
    pub fn new() -> Self {
        JITCompiler {
            cache: Arc::new(RwLock::new(HashMap::new())),
            hot_paths: Arc::new(RwLock::new(Vec::new())),
        }
    }
    /// Compile and optimize hot path
    pub async fn compile_hot_path(&self, script: &str) -> Result<OptimizedCode> {
        let mut cache = self.cache.write().await;
        let mut hot_paths = self.hot_paths.write().await;
        // Track hot paths
        if !hot_paths.contains(script) {
            hot_paths.push(script.to_string());
        }
        // Simple optimization simulation
        // In real implementation, would do actual JIT compilation
        let optimized: _ = optimize_script(script);
        let perf_gain: _ = calculate_performance_gain(script, &optimized);
        let code: _ = OptimizedCode {
            original: script.to_string(),
            optimized,
            performance_gain: perf_gain,
        };
        cache.insert(script.to_string(), code.clone());
        Ok(code)
    }
    /// Get cached optimized code
    pub async fn get_cached(&self, script: &str) -> Result<OptimizedCode> {
        let cache: _ = self.cache.read().await;
        cache
            .get(script)
            .cloned()
            .ok_or_else(|| anyhow!("Code not in cache"))
    }
    /// Check if script is a hot path
    pub async fn is_hot_path(&self, script: &str) -> bool {
        let hot_paths: _ = self.hot_paths.read().await;
        hot_paths.contains(script)
    }
}
impl InlineCache {
    /// Create a new inline cache
    pub fn new() -> Self {
        InlineCache {
            cache: Arc::new(RwLock::new(HashMap::new())),
        }
    }
    /// Get value from cache
    pub async fn get(&self, key: &str) -> Option<String> {
        let mut cache = self.cache.write().await;
        if let Some(entry) = cache.get_mut(key) {
            entry.hit_count += 1;
            entry.last_access = std::time::SystemTime::now();
            return Some(entry.value.clone());
        }
        None
    }
    /// Set value in cache
    pub async fn set(&self, key: &str, value: String) {
        let mut cache = self.cache.write().await;
        cache.insert(
            key.to_string(),
            CacheEntry {
                value,
                hit_count: 0,
                last_access: std::time::SystemTime::now(),
            },
        );
    }
    /// Clear cache
    pub async fn clear(&self) {
        let mut cache = self.cache.write().await;
        cache.clear();
    }
}
impl RustOptimizer {
    /// Create a new Rust optimizer
    pub fn new() -> Self {
        RustOptimizer {
            jit_compiler: Arc::new(JITCompiler::new()),
            inline_cache: Arc::new(InlineCache::new()),
            zero_copy: Arc::new(ZeroCopyBridge::new(Arc::new(MemoryPool::new(4096, 100)))),
        }
    }
    /// Optimize hot path
    pub async fn optimize_hot_path(&self, script: &str) -> Result<OptimizedCode> {
        // Check inline cache first
        if let Some(value) = self.inline_cache.get(script).await {
            return Ok(OptimizedCode {
                original: script.to_string(),
                optimized: value,
                performance_gain: 0.0,
            });
        }
        // Compile hot path
        let code: _ = self.jit_compiler.compile_hot_path(script).await?;
        // Cache the result
        self.inline_cache.set(script, code.optimized.clone()).await;
        Ok(code)
    }
    /// Execute with zero-copy optimization
    pub async fn execute_zero_copy(&self, target: &str, data: &[u8]) -> Result<Vec<u8>> {
        self.zero_copy.fast_path_call(target, data).await
    }
    /// Share memory for zero-copy operations
    pub async fn share_memory(&self, data: &[u8]) -> Result<SharedMemoryRegion> {
        self.zero_copy.share_memory(data).await
    }
    /// Get performance metrics
    pub async fn get_metrics(&self) -> Result<OptimizerMetrics> {
        let cache_size: _ = {
            let cache: _ = self.inline_cache.cache.read().await;
            cache.len() as u64
        };
        let hot_paths: _ = {
            let hot_paths: _ = self.jit_compiler.hot_paths.read().await;
            hot_paths.len() as u64
        };
        Ok(OptimizerMetrics {
            cache_size,
            hot_paths,
            zero_copy_regions: self.zero_copy.shared_memory.read().await.len() as u64,
        })
    }
}
/// Performance metrics
#[derive(Debug, Clone)]
pub struct OptimizerMetrics {
    pub cache_size: u64,
    pub hot_paths: u64,
    pub zero_copy_regions: u64,
}
// Helper functions
fn optimize_script(script: &str) -> String {
    // Simple optimization simulation
    // In real implementation, would do:
    // - Dead code elimination
    // - Constant folding
    // - Inlining
    // - Loop unrolling
    let mut optimized = script.to_string();
    // Simple optimization: remove extra whitespace
    optimized = optimized.split_whitespace().collect::<Vec<_>>().join(" ");
    optimized
}
fn calculate_performance_gain(original: &str, optimized: &str) -> f64 {
    // Simple performance gain calculation
    // In real implementation, would measure actual performance
    let original_size: _ = original.len();
    let optimized_size: _ = optimized.len();
    if original_size > 0 {
        ((original_size - optimized_size) as f64 / original_size as f64) * 100.0
    } else {
        0.0
    }
}
#[cfg(test)]
mod tests {
    #[tokio::test]
    async fn test_zero_copy_performance() {
        let optimizer: _ = RustOptimizer::new();
        let data: _ = b"Hello, World!";
        let result: _ = optimizer.execute_zero_copy("test_target", data).await;
        assert!(result.is_ok());
    }
    #[tokio::test]
    async fn test_rust_hot_path() {
        let optimizer: _ = RustOptimizer::new();
        let script: _ = "function test() { return 42; }";
        let result: _ = optimizer.optimize_hot_path(script).await;
        assert!(result.is_ok());
        let code: _ = result.unwrap();
        assert!(code.performance_gain >= 0.0);
    }
    #[tokio::test]
    async fn test_memory_sharing() {
        let optimizer: _ = RustOptimizer::new();
        let data: _ = b"Shared data";
        let result: _ = optimizer.share_memory(data).await;
        assert!(result.is_ok());
        let region: _ = result.unwrap();
        assert_eq!(region.size, data.len());
    }
    #[tokio::test]
    async fn test_inline_cache() {
        let cache: _ = InlineCache::new();
        cache.set("key1", "value1".to_string()).await;
        let value: _ = cache.get("key1").await;
        assert_eq!(value, Some("value1".to_string()));
    }
    #[tokio::test]
    async fn test_optimizer_metrics() {
        let optimizer: _ = RustOptimizer::new();
        let metrics: _ = optimizer.get_metrics().await;
        assert!(metrics.is_ok());
    }
}