rename async example to tokio

To reduce some confusion. Since this example was introduced, we
introduced a smaller nginx-native async executor directly to ngx

Author: pchickey

.github/workflows/nginx.yaml

@@ -49,7 +49,7 @@ env:
 
   NGX_TEST_FILES: examples/t
   NGX_TEST_GLOBALS_DYNAMIC: >-
-    load_module ${{ github.workspace }}/nginx/objs/ngx_http_async_module.so;
+    load_module ${{ github.workspace }}/nginx/objs/ngx_http_tokio_module.so;
     load_module ${{ github.workspace }}/nginx/objs/ngx_http_awssigv4_module.so;
     load_module ${{ github.workspace }}/nginx/objs/ngx_http_curl_module.so;
     load_module ${{ github.workspace }}/nginx/objs/ngx_http_shared_dict_module.so;

examples/Cargo.toml

@@ -47,8 +47,8 @@ path = "upstream.rs"
 crate-type = ["cdylib"]
 
 [[example]]
-name = "async"
-path = "async.rs"
+name = "tokio"
+path = "tokio.rs"
 crate-type = ["cdylib"]
 
 [[example]]

examples/config

@@ -16,9 +16,9 @@ if [ $HTTP = YES ]; then
     ngx_rust_target_features=
 
     if :; then
-        ngx_module_name=ngx_http_async_module
+        ngx_module_name=ngx_http_tokio_module
         ngx_module_libs="-lm"
-        ngx_rust_target_name=async
+        ngx_rust_target_name=tokio
 
         ngx_rust_module
     fi

examples/t/async.t renamed to examples/t/tokio.t

@@ -39,7 +39,7 @@ http {
         server_name  localhost;
 
         location / {
-            async on;
+            tokio on;
         }
     }
 }

examples/async.conf renamed to examples/tokio.conf

@@ -2,7 +2,7 @@ daemon off;
 master_process off;
 # worker_processes  1;
 
-load_module modules/libasync.so;
+load_module modules/libtokio.so;
 error_log error.log debug;
 
 events { }
@@ -14,7 +14,7 @@ http {
         location / {
             root   html;
             index  index.html index.htm;
-            async on;
+            tokio on;
         }
         error_page   500 502 503 504  /50x.html;
         location = /50x.html {

examples/async.rs renamed to examples/tokio.rs

@@ -20,7 +20,7 @@ struct Module;
 
 impl http::HttpModule for Module {
     fn module() -> &'static ngx_module_t {
-        unsafe { &*::core::ptr::addr_of!(ngx_http_async_module) }
+        unsafe { &*::core::ptr::addr_of!(ngx_http_tokio_module) }
     }
 
     unsafe extern "C" fn postconfiguration(cf: *mut ngx_conf_t) -> ngx_int_t {
@@ -51,7 +51,7 @@ unsafe impl HttpModuleLocationConf for Module {
 
 static mut NGX_HTTP_ASYNC_COMMANDS: [ngx_command_t; 2] = [
     ngx_command_t {
-        name: ngx_string!("async"),
+        name: ngx_string!("tokio"),
         type_: (NGX_HTTP_LOC_CONF | NGX_CONF_TAKE1) as ngx_uint_t,
         set: Some(ngx_http_async_commands_set_enable),
         conf: NGX_HTTP_LOC_CONF_OFFSET,
@@ -75,12 +75,12 @@ static NGX_HTTP_ASYNC_MODULE_CTX: ngx_http_module_t = ngx_http_module_t {
 // Generate the `ngx_modules` table with exported modules.
 // This feature is required to build a 'cdylib' dynamic module outside of the NGINX buildsystem.
 #[cfg(feature = "export-modules")]
-ngx::ngx_modules!(ngx_http_async_module);
+ngx::ngx_modules!(ngx_http_tokio_module);
 
 #[used]
 #[allow(non_upper_case_globals)]
 #[cfg_attr(not(feature = "export-modules"), no_mangle)]
-pub static mut ngx_http_async_module: ngx_module_t = ngx_module_t {
+pub static mut ngx_http_tokio_module: ngx_module_t = ngx_module_t {
     ctx: std::ptr::addr_of!(NGX_HTTP_ASYNC_MODULE_CTX) as _,
     commands: unsafe { &NGX_HTTP_ASYNC_COMMANDS[0] as *const _ as *mut _ },
     type_: NGX_HTTP_MODULE as _,
@@ -149,7 +149,7 @@ http_request_handler!(async_access_handler, |request: &mut http::Request| {
     }
 
     if let Some(ctx) =
-        unsafe { request.get_module_ctx::<RequestCTX>(&*addr_of!(ngx_http_async_module)) }
+        unsafe { request.get_module_ctx::<RequestCTX>(&*addr_of!(ngx_http_tokio_module)) }
     {
         if !ctx.done.load(Ordering::Relaxed) {
             return core::Status::NGX_AGAIN;
@@ -162,7 +162,7 @@ http_request_handler!(async_access_handler, |request: &mut http::Request| {
     if ctx.is_null() {
         return core::Status::NGX_ERROR;
     }
-    request.set_module_ctx(ctx.cast(), unsafe { &*addr_of!(ngx_http_async_module) });
+    request.set_module_ctx(ctx.cast(), unsafe { &*addr_of!(ngx_http_tokio_module) });
 
     let ctx = unsafe { &mut *ctx };
     ctx.event.handler = Some(check_async_work_done);