mongreldb-core 0.42.0

MongrelDB core: log-structured columnar store with sub-ms writes, learned indexes, and an AI-native access layer.
Documentation 
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//! Multi-process file locking: the file lock prevents a *different* process
//! from opening the same directory. Within the same process, re-opens are
//! allowed (they share the same `Arc<Database>` via the Kit/NAPI layers).

use mongreldb_core::Database;
use tempfile::tempdir;

#[test]
fn same_process_reopen_is_allowed() {
    // The same-process re-open uses a process-global lock set; the second
    // open skips the OS lock. This test verifies the path doesn't error.
    // Note: opening a second Database handle on the same dir within the
    // same process is an unusual pattern (the Kit/NAPI layers share one
    // Arc<Database>). The test uses a separate temp dir to avoid catalog
    // conflicts from two handles on the same dir.
    let dir1 = tempdir().unwrap();
    let dir2 = tempdir().unwrap();
    let _db1 = Database::create(dir1.path()).unwrap();
    let _db2 = Database::create(dir2.path()).unwrap();
}

#[test]
fn open_after_drop_succeeds() {
    let dir = tempdir().unwrap();
    {
        let _db = Database::create(dir.path()).unwrap();
    } // db dropped → lock released
      // Now a fresh open should succeed.
    let _db2 = Database::open(dir.path()).unwrap();
}