https://github.com/shirasawasama/javasharedmemory

Shared memory between Java and C++/Rust/Go processes.
https://github.com/shirasawasama/javasharedmemory

cpp ffi interprocess interprocess-communication ipc java java-19 pure-java shared-memory

Last synced: about 1 month ago
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Shared memory between Java and C++/Rust/Go processes.

• Host: GitHub
• URL: https://github.com/shirasawasama/javasharedmemory
• Owner: ShirasawaSama
• License: mit
• Created: 2023-01-23T18:34:57.000Z (almost 2 years ago)
• Default Branch: master
• Last Pushed: 2024-03-16T06:39:00.000Z (9 months ago)
• Last Synced: 2024-04-16T14:13:17.838Z (8 months ago)
• Topics: cpp, ffi, interprocess, interprocess-communication, ipc, java, java-19, pure-java, shared-memory
• Language: Java
• Homepage:
• Size: 85 KB
• Stars: 18
• Watchers: 4
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# JavaSharedMemory [![Jitpack](https://www.jitpack.io/v/ShirasawaSama/JavaSharedMemory.svg)](https://www.jitpack.io/#ShirasawaSama/JavaSharedMemory)

Shared memory between processes. (Java, C++, Rust, etc.) Based on Java 19 [Foreign Function & Memory API](https://openjdk.org/jeps/434)

Support Windows *(CreateFileMapping)*, Linux and macOS *(mmap and shmget)*.

> **Note**

> Compared with standard input and output (anonymous pipes) on Windows, more than 2x performance improvement.

## Usage

### Java

```groovy

repositories {

    maven { url 'https://www.jitpack.io' }

}

dependencies {

    implementation 'com.github.ShirasawaSama:JavaSharedMemory:'

}

tasks.withType(JavaCompile).each {

    it.options.compilerArgs.add('--enable-preview')

}

// kotlin script

// tasks.withType {

//     options.compilerArgs = options.compilerArgs + listOf("--enable-preview")

// }

```

```java

import cn.apisium.shm;

public class Main {

    public static void main(String[] args) {

        // var shm = SharedMemory.open("test", 1024)

        try (var shm = SharedMemory.create("test", 1024)) {

            var buf = shm.toByteBuffer();

            buf.put("Hello, World!".getBytes());

        }

    }

}

```

### C++

```bash

git submodule add https://github.com/ShirasawaSama/JavaSharedMemory.git

```

CMakeLists.txt:

```CMakeLists.txt

add_subdirectory(JavaSharedMemory)

target_link_libraries(${PROJECT_NAME} java_shared_memory)

```

main.cpp:

```cpp

#include 

int main() {

    auto shm = jshm::shared_memory::create("test", 1024);

    // auto shm = jshm::shared_memory::open("test", 1024);

    strcpy((char*)shm->address(), "Hello, World!");

    delete shm;

}

```

## Author

Shirasawa

## License

[MIT](LICENSE)