code for chapter12 pd added

chapter11/tcpudp/target/rls/debug/deps/save-analysis/tcpudp-97cca98b69045fb9.json

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chapter12/ffi/Cargo.lock

@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "ffi"
+version = "0.1.0"

chapter12/ffi/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "ffi"
+version = "0.1.0"
+authors = ["peshwar9"]
+edition = "2018"
+
+
+[lib] 
+name = "ffitest" 
+crate-type = ["dylib"] 
+
+[dependencies]

chapter12/ffi/rustffi.c

@@ -0,0 +1,5 @@
+#include "rustffi.h"
+int main(void)
+{
+    see_ffi_in_action();
+}

chapter12/ffi/rustffi.h

@@ -0,0 +1 @@
+void see_ffi_in_action();

chapter12/ffi/src/lib.rs

@@ -0,0 +1,4 @@
+#[no_mangle]
+pub extern "C" fn see_ffi_in_action() {
+    println!("Congrats! You have successfully invoked Rust shared library from a C program");
+}

chapter12/ffi/target/rls/.rustc_info.json

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chapter12/ffi/target/rls/debug/.fingerprint/ffi-19d6d678a2f77aa3/invoked.timestamp

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+This file has an mtime of when this was started.

chapter12/ffi/target/rls/debug/.fingerprint/ffi-19d6d678a2f77aa3/test-lib-ffitest-19d6d678a2f77aa3

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chapter12/ffi/target/rls/debug/.fingerprint/ffi-19d6d678a2f77aa3/test-lib-ffitest-19d6d678a2f77aa3.json

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chapter12/ffi/target/rls/debug/.fingerprint/ffi-273a3790abc26d1b/invoked.timestamp

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+This file has an mtime of when this was started.

chapter12/ffi/target/rls/debug/.fingerprint/ffi-273a3790abc26d1b/lib-ffitest-273a3790abc26d1b

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+6a5b87701bbe103b

chapter12/ffi/target/rls/debug/.fingerprint/ffi-273a3790abc26d1b/lib-ffitest-273a3790abc26d1b.json

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chapter12/ffi/target/rls/debug/deps/ffitest-19d6d678a2f77aa3.d

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+
+/Users/prabhueshwarla/rust/author/packt/prod/chapter12/ffi/target/rls/debug/deps/ffitest-19d6d678a2f77aa3.d: src/lib.rs
+
+src/lib.rs:

chapter12/ffi/target/rls/debug/deps/ffitest-273a3790abc26d1b.d

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+/Users/prabhueshwarla/rust/author/packt/prod/chapter12/ffi/target/rls/debug/deps/ffitest-273a3790abc26d1b.rmeta: src/lib.rs
+
+/Users/prabhueshwarla/rust/author/packt/prod/chapter12/ffi/target/rls/debug/deps/ffitest-273a3790abc26d1b.d: src/lib.rs
+
+src/lib.rs:

chapter12/ffi/target/rls/debug/deps/save-analysis/libffitest-273a3790abc26d1b.json

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