From 9f605830d29d3e26d466e6723212944be8f74802 Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Wed, 30 Sep 2020 23:55:04 +0800
Subject: [PATCH] feat: add load.c

---
 live-reload-rust/load.c            | 24 ++++++++++++++++++++++++
 live-reload-rust/load.c-compile.sh |  1 +
 2 files changed, 25 insertions(+)
 create mode 100644 live-reload-rust/load.c
 create mode 100755 live-reload-rust/load.c-compile.sh

diff --git a/live-reload-rust/load.c b/live-reload-rust/load.c
new file mode 100644
index 0000000..5258a0a
--- /dev/null
+++ b/live-reload-rust/load.c
@@ -0,0 +1,24 @@
+#include <dlfcn.h>
+#include <stdio.h>
+
+// C function pointer syntax is... something.
+// Let's typedef our way out of this one.
+typedef void (*greet_t)(const char *name);
+
+int main(void) {
+    // what do we want? symbols!
+    // when do we want them? at an implementation-defined time!
+    void *lib = dlopen("./main-greet", RTLD_LAZY);
+    if (!lib) {
+        fprintf(stderr, "failed to load library\n");
+        return 1;
+    }
+    greet_t greet = (greet_t) dlsym(lib, "greet");
+    if (!greet) {
+        fprintf(stderr, "could not look up symbol 'greet'\n");
+        return 1;
+    }
+    greet("venus");
+    dlclose(lib);
+    return 0;
+}
diff --git a/live-reload-rust/load.c-compile.sh b/live-reload-rust/load.c-compile.sh
new file mode 100755
index 0000000..2d0994d
--- /dev/null
+++ b/live-reload-rust/load.c-compile.sh
@@ -0,0 +1 @@
+gcc -Wall load.c -o load