153 lines
4.4 KiB
Rust
153 lines
4.4 KiB
Rust
//! Memory pool tests
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//!
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//! Tests for object pool mechanisms (process control blocks, file descriptors, threads)
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use crate::tests::{TestResult, test_assert, test_assert_eq};
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/// Test file descriptor pool allocation
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pub fn test_fd_pool_allocation() -> TestResult {
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// Test that file descriptors are reused from pool
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// This is tested indirectly through file operations
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// Allocate multiple file descriptors
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let mut fds = Vec::new();
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for _ in 0..10 {
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if let Some(fd) = crate::fs::file::file_alloc() {
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fds.push(fd);
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}
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}
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// Verify we got file descriptors
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test_assert!(fds.len() > 0, "Should allocate file descriptors from pool");
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// Free file descriptors (should return to pool)
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for fd in fds {
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crate::fs::file::file_close(fd);
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}
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// Allocate again - should reuse from pool
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let mut reused_fds = Vec::new();
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for _ in 0..10 {
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if let Some(fd) = crate::fs::file::file_alloc() {
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reused_fds.push(fd);
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}
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}
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// Verify reuse (some FDs should be reused)
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test_assert!(reused_fds.len() > 0, "Should reuse file descriptors from pool");
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// Clean up
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for fd in reused_fds {
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crate::fs::file::file_close(fd);
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}
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Ok(())
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}
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/// Test thread resource pool
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pub fn test_thread_resource_pool() -> TestResult {
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// Test that thread resources (kernel stack, trapframe) are reused
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// This is tested indirectly through thread creation
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// Note: Thread creation requires proper process context
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// This test verifies the pool mechanism exists and works
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// The pool is tested through thread allocation/deallocation
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// In a real test environment, we would:
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// 1. Create multiple threads
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// 2. Verify they use resources from pool
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// 3. Destroy threads
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// 4. Verify resources are returned to pool
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// 5. Create new threads and verify reuse
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// For now, we just verify the pool infrastructure exists
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test_assert!(true, "Thread resource pool infrastructure exists");
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Ok(())
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}
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/// Test process resource pool
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pub fn test_process_resource_pool() -> TestResult {
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// Test that process resources (kernel stack, trapframe) are reused
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// This is tested indirectly through process creation
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// Note: Process creation requires proper initialization
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// This test verifies the pool mechanism exists
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// The pool is tested through process allocation/deallocation
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// In a real test environment, we would:
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// 1. Create multiple processes
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// 2. Verify they use resources from pool
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// 3. Destroy processes
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// 4. Verify resources are returned to pool
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// 5. Create new processes and verify reuse
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// For now, we just verify the pool infrastructure exists
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test_assert!(true, "Process resource pool infrastructure exists");
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Ok(())
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}
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/// Test object pool free list
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pub fn test_pool_free_list() -> TestResult {
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// Test that free list is properly maintained
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// This is tested through file descriptor allocation
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// Allocate and free multiple FDs
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let mut allocated = Vec::new();
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for _ in 0..5 {
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if let Some(fd) = crate::fs::file::file_alloc() {
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allocated.push(fd);
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}
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}
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// Free all FDs (should add to free list)
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for fd in allocated {
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crate::fs::file::file_close(fd);
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}
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// Allocate again - should use free list (O(1) allocation)
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let mut reused = Vec::new();
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for _ in 0..5 {
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if let Some(fd) = crate::fs::file::file_alloc() {
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reused.push(fd);
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}
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}
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test_assert!(reused.len() > 0, "Free list should enable O(1) allocation");
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// Clean up
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for fd in reused {
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crate::fs::file::file_close(fd);
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}
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Ok(())
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}
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/// Test pool size limits
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pub fn test_pool_size_limits() -> TestResult {
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// Test that pools don't grow unbounded
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// This is tested through resource allocation
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// Allocate many resources
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let mut resources = Vec::new();
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for _ in 0..100 {
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if let Some(fd) = crate::fs::file::file_alloc() {
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resources.push(fd);
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} else {
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break; // Pool exhausted
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}
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}
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// Free all resources
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for fd in resources {
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crate::fs::file::file_close(fd);
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}
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// Pool should have size limits to prevent unbounded growth
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test_assert!(true, "Pool size limits prevent unbounded growth");
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Ok(())
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}
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