From 033bbe2512baafe2a1e1c5c14993f0fa7ec03f13 Mon Sep 17 00:00:00 2001 From: eli Date: Mon, 26 Jan 2026 08:05:00 +0000 Subject: [PATCH] MMap native library --- .gitignore | 6 + .npmignore | 6 + binding.gyp | 25 + lib/index.ts | 89 +++ package-lock.json | 1282 +++++++++++++++++++++++++++++++++++++++++++ package.json | 32 ++ src/mmap_binding.cc | 253 +++++++++ test.ts | 40 ++ tsconfig.json | 16 + 9 files changed, 1749 insertions(+) create mode 100644 .gitignore create mode 100644 .npmignore create mode 100644 binding.gyp create mode 100644 lib/index.ts create mode 100644 package-lock.json create mode 100644 package.json create mode 100644 src/mmap_binding.cc create mode 100644 test.ts create mode 100644 tsconfig.json diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..862f83b --- /dev/null +++ b/.gitignore @@ -0,0 +1,6 @@ +node_modules/ +build/ +dist/ +*.log +*.node +.DS_Store \ No newline at end of file diff --git a/.npmignore b/.npmignore new file mode 100644 index 0000000..64fdf96 --- /dev/null +++ b/.npmignore @@ -0,0 +1,6 @@ +node_modules/ +build/ +*.log +.DS_Store +test.ts +tsconfig.json \ No newline at end of file diff --git a/binding.gyp b/binding.gyp new file mode 100644 index 0000000..7989294 --- /dev/null +++ b/binding.gyp @@ -0,0 +1,25 @@ +# binding.gyp +{ + "targets": [ + { + "target_name": "mmap_binding", + "sources": ["src/mmap_binding.cc"], + "include_dirs": [], + "cflags!": ["-fno-exceptions"], + "cflags_cc!": ["-fno-exceptions"], + "cflags_cc": ["-std=c++20", "-fexceptions"], + "conditions": [ + ["OS=='mac'", { + "xcode_settings": { + "CLANG_CXX_LANGUAGE_STANDARD": "c++20", + "GCC_ENABLE_CPP_EXCEPTIONS": "YES", + "MACOSX_DEPLOYMENT_TARGET": "10.15" + } + }], + ["OS=='linux'", { + "cflags_cc": ["-std=c++20"] + }] + ] + } + ] +} \ No newline at end of file diff --git a/lib/index.ts b/lib/index.ts new file mode 100644 index 0000000..b9947cd --- /dev/null +++ b/lib/index.ts @@ -0,0 +1,89 @@ +// 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, + 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+++ b/package.json @@ -0,0 +1,32 @@ +{ + "name": "@elilee/mmap-native", + "version": "1.0.0", + "description": "", + "license": "ISC", + "author": "", + "type": "module", + "main": "./dist/lib/index.js", + "types": "./dist/lib/index.d.ts", + "scripts": { + "install": "node-gyp rebuild", + "build:native": "node-gyp rebuild", + "build:ts": "tsc", + "build": "npm run build:native && npm run build:ts", + "clean": "node-gyp clean && rm -rf dist" + }, + "devDependencies": { + "@types/node": "^22.0.0", + "node-gyp": "^11.0.0", + "typescript": "^5.7.0" + }, + "overrides": { + "tar": "^7.0.0", + "glob": "^10.0.0", + "rimraf": "^5.0.0" + }, + "engines": { + "node": ">=18.0.0" + }, + "os": ["linux", "darwin"], + "cpu": ["x64", "arm64"] +} diff --git a/src/mmap_binding.cc b/src/mmap_binding.cc new file mode 100644 index 0000000..4020d0d --- /dev/null +++ b/src/mmap_binding.cc @@ -0,0 +1,253 @@ +// src/mmap_binding.cc +#define NAPI_VERSION 8 +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +// ============== 에러 처리 매크로 ============== +#define NAPI_CALL(env, call) \ + do { \ + napi_status status = (call); \ + if (status != napi_ok) { \ + const napi_extended_error_info* error_info = nullptr; \ + napi_get_last_error_info((env), &error_info); \ + const char* msg = (error_info && error_info->error_message) \ + ? error_info->error_message \ + : "Unknown N-API error"; \ + napi_throw_error((env), nullptr, msg); \ + return nullptr; \ + } \ + } while (0) + +#define THROW_ERRNO(env, prefix) \ + do { \ + char buf[256]; \ + std::snprintf(buf, sizeof(buf), "%s: %s", prefix, std::strerror(errno)); \ + napi_throw_error(env, nullptr, buf); \ + return nullptr; \ + } while (0) + +// ============== 매핑 정보 저장 ============== +struct MmapInfo { + void* addr; + size_t length; + int fd; + bool owns_fd; +}; + +static std::unordered_map g_mappings; +static std::mutex g_mutex; + +// ============== Buffer Destructor (GC 시 자동 unmap) ============== +static void buffer_release_callback(napi_env env, void* data, void* hint) { + std::lock_guard lock(g_mutex); + + auto it = g_mappings.find(data); + if (it != g_mappings.end()) { + munmap(it->second.addr, it->second.length); + if (it->second.owns_fd && it->second.fd >= 0) { + close(it->second.fd); + } + g_mappings.erase(it); + } +} + +// ============== mmap(size, prot, flags, fd, offset) -> Buffer ============== +static napi_value MmapMap(napi_env env, napi_callback_info info) { + size_t argc = 5; + napi_value args[5]; + NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, nullptr, nullptr)); + + if (argc < 5) { + napi_throw_error(env, nullptr, "mmap.map requires 5 arguments: size, prot, flags, fd, offset"); + return nullptr; + } + + int64_t size, prot, flags, fd, offset; + NAPI_CALL(env, napi_get_value_int64(env, args[0], &size)); + NAPI_CALL(env, napi_get_value_int64(env, args[1], &prot)); + NAPI_CALL(env, napi_get_value_int64(env, args[2], &flags)); + NAPI_CALL(env, napi_get_value_int64(env, args[3], &fd)); + NAPI_CALL(env, napi_get_value_int64(env, args[4], &offset)); + + void* addr = mmap(nullptr, static_cast(size), + static_cast(prot), static_cast(flags), + static_cast(fd), static_cast(offset)); + + if (addr == MAP_FAILED) { + THROW_ERRNO(env, "mmap failed"); + } + + { + std::lock_guard lock(g_mutex); + g_mappings[addr] = {addr, static_cast(size), static_cast(fd), false}; + } + + napi_value buffer; + NAPI_CALL(env, napi_create_external_buffer(env, static_cast(size), + addr, buffer_release_callback, + nullptr, &buffer)); + + return buffer; +} + +// ============== msync(buffer, offset, length, flags) ============== +static napi_value MmapSync(napi_env env, napi_callback_info info) { + size_t argc = 4; + napi_value args[4]; + NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, nullptr, nullptr)); + + if (argc < 4) { + napi_throw_error(env, nullptr, "mmap.sync requires 4 arguments: buffer, offset, length, flags"); + return nullptr; + } + + void* data; + size_t buffer_length; + NAPI_CALL(env, napi_get_buffer_info(env, args[0], &data, &buffer_length)); + + int64_t offset, length, flags; + NAPI_CALL(env, napi_get_value_int64(env, args[1], &offset)); + NAPI_CALL(env, napi_get_value_int64(env, args[2], &length)); + NAPI_CALL(env, napi_get_value_int64(env, args[3], &flags)); + + if (offset < 0 || length < 0 || static_cast(offset + length) > buffer_length) { + napi_throw_range_error(env, nullptr, "Invalid offset/length for msync"); + return nullptr; + } + + char* sync_addr = static_cast(data) + offset; + if (msync(sync_addr, static_cast(length), static_cast(flags)) != 0) { + THROW_ERRNO(env, "msync failed"); + } + + napi_value undefined; + NAPI_CALL(env, napi_get_undefined(env, &undefined)); + return undefined; +} + +// ============== munmap(buffer) ============== +static napi_value MmapUnmap(napi_env env, napi_callback_info info) { + size_t argc = 1; + napi_value args[1]; + NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, nullptr, nullptr)); + + if (argc < 1) { + napi_throw_error(env, nullptr, "mmap.unmap requires 1 argument: buffer"); + return nullptr; + } + + void* data; + size_t length; + NAPI_CALL(env, napi_get_buffer_info(env, args[0], &data, &length)); + + std::lock_guard lock(g_mutex); + auto it = g_mappings.find(data); + if (it != g_mappings.end()) { + if (munmap(it->second.addr, it->second.length) != 0) { + THROW_ERRNO(env, "munmap failed"); + } + g_mappings.erase(it); + } + + napi_value undefined; + NAPI_CALL(env, napi_get_undefined(env, &undefined)); + return undefined; +} + +// ============== madvise(buffer, offset, length, advice) ============== +static napi_value MmapAdvise(napi_env env, napi_callback_info info) { + size_t argc = 4; + napi_value args[4]; + NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, nullptr, nullptr)); + + if (argc < 4) { + napi_throw_error(env, nullptr, "mmap.advise requires 4 arguments: buffer, offset, length, advice"); + return nullptr; + } + + void* data; + size_t buffer_length; + NAPI_CALL(env, napi_get_buffer_info(env, args[0], &data, &buffer_length)); + + int64_t offset, length, advice; + NAPI_CALL(env, napi_get_value_int64(env, args[1], &offset)); + NAPI_CALL(env, napi_get_value_int64(env, args[2], &length)); + NAPI_CALL(env, napi_get_value_int64(env, args[3], &advice)); + + char* advise_addr = static_cast(data) + offset; + if (madvise(advise_addr, static_cast(length), static_cast(advice)) != 0) { + THROW_ERRNO(env, "madvise failed"); + } + + napi_value undefined; + NAPI_CALL(env, napi_get_undefined(env, &undefined)); + return undefined; +} + +// ============== pageSize() -> number ============== +static napi_value GetPageSize(napi_env env, napi_callback_info info) { + napi_value result; + NAPI_CALL(env, napi_create_int64(env, sysconf(_SC_PAGESIZE), &result)); + return result; +} + +// ============== 상수 정의 헬퍼 ============== +static void DefineConstant(napi_env env, napi_value exports, const char* name, int64_t value) { + napi_value val; + napi_create_int64(env, value, &val); + napi_set_named_property(env, exports, name, val); +} + +// ============== 모듈 초기화 ============== +static napi_value Init(napi_env env, napi_value exports) { + napi_property_descriptor props[] = { + {"map", nullptr, MmapMap, nullptr, nullptr, nullptr, napi_default, nullptr}, + {"sync", nullptr, MmapSync, nullptr, nullptr, nullptr, napi_default, nullptr}, + {"unmap", nullptr, MmapUnmap, nullptr, nullptr, nullptr, napi_default, nullptr}, + {"advise", nullptr, MmapAdvise, nullptr, nullptr, nullptr, napi_default, nullptr}, + {"pageSize", nullptr, GetPageSize, nullptr, nullptr, nullptr, napi_default, nullptr}, + }; + + NAPI_CALL(env, napi_define_properties(env, exports, sizeof(props) / sizeof(props[0]), props)); + + // Protection flags + DefineConstant(env, exports, "PROT_NONE", PROT_NONE); + DefineConstant(env, exports, "PROT_READ", PROT_READ); + DefineConstant(env, exports, "PROT_WRITE", PROT_WRITE); + DefineConstant(env, exports, "PROT_EXEC", PROT_EXEC); + + // Map flags + DefineConstant(env, exports, "MAP_SHARED", MAP_SHARED); + DefineConstant(env, exports, "MAP_PRIVATE", MAP_PRIVATE); +#ifdef MAP_ANONYMOUS + DefineConstant(env, exports, "MAP_ANONYMOUS", MAP_ANONYMOUS); +#endif +#ifdef MAP_ANON + DefineConstant(env, exports, "MAP_ANON", MAP_ANON); +#endif + + // Sync flags + DefineConstant(env, exports, "MS_ASYNC", MS_ASYNC); + DefineConstant(env, exports, "MS_SYNC", MS_SYNC); + DefineConstant(env, exports, "MS_INVALIDATE", MS_INVALIDATE); + + // Advise flags + DefineConstant(env, exports, "MADV_NORMAL", MADV_NORMAL); + DefineConstant(env, exports, "MADV_RANDOM", MADV_RANDOM); + DefineConstant(env, exports, "MADV_SEQUENTIAL", MADV_SEQUENTIAL); + DefineConstant(env, exports, "MADV_WILLNEED", MADV_WILLNEED); + DefineConstant(env, exports, "MADV_DONTNEED", MADV_DONTNEED); + + return exports; +} + +NAPI_MODULE(NODE_GYP_MODULE_NAME, Init) \ No newline at end of file diff --git a/test.ts b/test.ts new file mode 100644 index 0000000..4ad5551 --- /dev/null +++ b/test.ts @@ -0,0 +1,40 @@ +// test.ts +import * as fs from 'node:fs'; +import mmap from './lib/index.js'; + +const FILE_PATH = './test_mmap.bin'; +const FILE_SIZE = 4096; + +// 파일 생성 +const fd = fs.openSync(FILE_PATH, 'w+'); +fs.ftruncateSync(fd, FILE_SIZE); + +// mmap 매핑 +const buffer = mmap.map( + FILE_SIZE, + mmap.PROT_READ | mmap.PROT_WRITE, + mmap.MAP_SHARED, + fd, + 0 +); + +console.log('Mapped buffer length:', buffer.length); +console.log('Page size:', mmap.pageSize()); + +// 데이터 쓰기 +buffer.write('Hello, mmap!', 0, 'utf8'); +buffer.writeUInt32LE(12345, 100); + +// msync +mmap.sync(buffer, 0, FILE_SIZE, mmap.MS_SYNC); +console.log('Data synced to disk'); + +// 데이터 읽기 +console.log('String:', buffer.toString('utf8', 0, 12)); +console.log('Number:', buffer.readUInt32LE(100)); + +// 정리 +fs.closeSync(fd); +fs.unlinkSync(FILE_PATH); + +console.log('Test passed!'); \ No newline at end of file diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..049560b --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,16 @@ +// tsconfig.json +{ + "compilerOptions": { + "target": "ES2022", + "module": "NodeNext", + "moduleResolution": "NodeNext", + "outDir": "./dist", + "rootDir": ".", + "strict": true, + "esModuleInterop": true, + "skipLibCheck": true, + "declaration": true + }, + "include": ["lib/**/*", "test.ts"], + "exclude": ["node_modules", "dist", "build"] +} \ No newline at end of file