MMap native library

lib/index.ts

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+// lib/index.ts
+import { createRequire } from 'node:module';
+import * as path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const require = createRequire(import.meta.url);
+
+// dist/lib/index.js 에서 실행될 때 -> ../../build/Release/
+// lib/index.ts 에서 실행될 때 -> ../build/Release/
+// 둘 다 지원하도록 동적으로 찾기
+
+function findBinding(): string {
+  const candidates = [
+    path.join(__dirname, '..', '..', 'build', 'Release', 'mmap_binding.node'),  // dist/lib/ 기준
+    path.join(__dirname, '..', 'build', 'Release', 'mmap_binding.node'),        // lib/ 기준
+  ];
+  
+  for (const candidate of candidates) {
+    try {
+      require.resolve(candidate);
+      return candidate;
+    } catch {
+      continue;
+    }
+  }
+  
+  throw new Error('Cannot find mmap_binding.node. Run `npm run build:native` first.');
+}
+
+const binding = require(findBinding());
+
+// 타입 정의
+export interface MmapBinding {
+  map(size: number, prot: number, flags: number, fd: number, offset: number): Buffer;
+  sync(buffer: Buffer, offset: number, length: number, flags: number): void;
+  unmap(buffer: Buffer): void;
+  advise(buffer: Buffer, offset: number, length: number, advice: number): void;
+  pageSize(): number;
+
+  PROT_NONE: number;
+  PROT_READ: number;
+  PROT_WRITE: number;
+  PROT_EXEC: number;
+
+  MAP_SHARED: number;
+  MAP_PRIVATE: number;
+  MAP_ANONYMOUS?: number;
+  MAP_ANON?: number;
+
+  MS_ASYNC: number;
+  MS_SYNC: number;
+  MS_INVALIDATE: number;
+
+  MADV_NORMAL: number;
+  MADV_RANDOM: number;
+  MADV_SEQUENTIAL: number;
+  MADV_WILLNEED: number;
+  MADV_DONTNEED: number;
+}
+
+const mmap: MmapBinding = binding;
+
+export default mmap;
+
+export const {
+  map,
+  sync,
+  unmap,
+  advise,
+  pageSize,
+  PROT_NONE,
+  PROT_READ,
+  PROT_WRITE,
+  PROT_EXEC,
+  MAP_SHARED,
+  MAP_PRIVATE,
+  MAP_ANONYMOUS,
+  MAP_ANON,
+  MS_ASYNC,
+  MS_SYNC,
+  MS_INVALIDATE,
+  MADV_NORMAL,
+  MADV_RANDOM,
+  MADV_SEQUENTIAL,
+  MADV_WILLNEED,
+  MADV_DONTNEED,
+} = mmap;