[eclipse-iceoryx#210] Create simple playground example

Cargo.toml

@@ -12,6 +12,8 @@ members = [
     "iceoryx2-bb/testing",
     "iceoryx2-bb/trait-tests",
 
+    "iceoryx2-lang/c",
+
     "iceoryx2-cal",
     "iceoryx2",
     "iceoryx2-pal/concurrency-sync",
@@ -54,10 +56,13 @@ iceoryx2-pal-configuration = { version = "0.3.0", path = "iceoryx2-pal/configura
 
 iceoryx2-cal = { version = "0.3.0", path = "iceoryx2-cal" }
 
+iceoryx2-lang-c = { version = "0.3.0", path = "iceoryx2-lang-c" }
+
 iceoryx2 = { version = "0.3.0", path = "iceoryx2/" }
 
 bindgen = { version = "0.65.1" }
 bitflags = { version = "1.3.2" }
+cbindgen = { version = "0.26.0" }
 cc = { version = "1.0" }
 cdr = { version = "0.2.4" }
 clap = { version = "3.2.25", features = ["derive"] }

iceoryx2-lang/c/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "iceoryx2-lang-c"
+categories.workspace = true
+description.workspace = true
+edition.workspace = true
+homepage.workspace = true
+keywords.workspace = true
+license.workspace = true
+readme.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+version.workspace = true
+build = "build.rs"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+path = "src/lib.rs"
+name = "iceoryx2_lang_c"
+crate-type = ["cdylib", "staticlib"]
+
+[build-dependencies]
+cbindgen = { workspace = true }
+
+[dependencies]
+iceoryx2 = { workspace = true }

iceoryx2-lang/c/README.md

@@ -0,0 +1,4 @@
+ * compile: `gcc example.c -Ltarget/debug -liceoryx2_lang_c`
+ * set library path: `set -gx LD_LIBRARY_PATH $HOME/Development/iceoryx2/target/debug/`
+
+ * see: https://github.com/corrosion-rs/corrosion

iceoryx2-lang/c/build.rs

@@ -0,0 +1,19 @@
+extern crate cbindgen;
+
+use std::env;
+
+use cbindgen::Config;
+
+fn main() {
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+
+    let mut config = Config::default();
+    config.language = cbindgen::Language::C;
+
+    cbindgen::Builder::new()
+        .with_crate(crate_dir)
+        .with_config(config)
+        .generate()
+        .expect("Unable to generate c bindings")
+        .write_to_file("iceoryx2.h");
+}

iceoryx2-lang/c/iceoryx2.h

@@ -0,0 +1,6 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+void zero_copy_service_list(void);

iceoryx2-lang/c/src/lib.rs

@@ -0,0 +1,4 @@
+#[no_mangle]
+pub extern "C" fn zero_copy_service_list() {
+    println!("hello world");
+}