Add experimental C-API for evaluation

Makefile

@@ -40,6 +40,12 @@ examples:
 	for FILE in $(THREADED_EXAMPLE_FILES); do $(CXX) -pthread -flto -O3 $(CXXFLAGS) examples/$$FILE.cpp -o $$FILE $(LDFLAGS) & done; \
 	wait
 
+.PHONY: capi
+capi:
+	$(MAKE) -C uSockets
+	$(CXX) -shared -fPIC -flto -O3 $(CXXFLAGS) capi/App.cpp -o capi.so $(LDFLAGS)
+	$(CXX) capi/example.c -O3 capi.so -o example
+
 install:
 	mkdir -p "$(DESTDIR)$(prefix)/include/uWebSockets/f2"
 	cp -r src/* "$(DESTDIR)$(prefix)/include/uWebSockets"

capi/App.cpp

@@ -0,0 +1,34 @@
+#include "libuwebsockets.h"
+#include "App.h"
+
+extern "C" {
+
+    uws_app_t *uws_create_app() {
+        return (uws_app_t *) new uWS::App();
+    }
+
+    void uws_app_get(uws_app_t *app, const char *pattern, void (*handler)(uws_res_t *, uws_req_t *)) {
+        uWS::App *uwsApp = (uWS::App *) app;
+        uwsApp->get(pattern, [handler](auto *res, auto *req) {
+            handler((uws_res_t *) res, (uws_req_t *) req);
+        });
+    }
+
+    void uws_app_run(uws_app_t *app) {
+        uWS::App *uwsApp = (uWS::App *) app;
+        uwsApp->run();
+    }
+
+    void uws_res_end(uws_res_t *res, const char *data, size_t length) {
+        uWS::HttpResponse<false> *uwsRes = (uWS::HttpResponse<false> *) res;
+        uwsRes->end(data, length);
+    }
+
+    void uws_app_listen(uws_app_t *app, int port, void (*handler)(void *)) {
+        uWS::App *uwsApp = (uWS::App *) app;
+        uwsApp->listen(port, [handler](struct us_listen_socket_t *listen_socket) {
+            handler((void *) listen_socket);
+        });
+    }
+
+}

capi/example.c

@@ -0,0 +1,19 @@
+#include "libuwebsockets.h"
+#include <stdio.h>
+
+void get_handler(uws_res_t *res, uws_req_t *req) {
+    uws_res_end(res, "Hello CAPI!", 11);
+}
+
+void listen_handler(void *listen_socket) {
+    if (listen_socket) {
+        printf("Listening on port now\n");
+    }
+}
+
+int main() {
+    uws_app_t *app = uws_create_app();
+    uws_app_get(app, "/*", get_handler);
+    uws_app_listen(app, 3000, listen_handler);
+    uws_app_run(app);
+}

capi/libuwebsockets.h

@@ -0,0 +1,29 @@
+#ifndef LIBUWS_CAPI_HEADER
+#define LIBUS_CAPI_HEADER
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct uws_app_s;
+struct uws_req_s;
+struct uws_res_s;
+typedef struct uws_app_s uws_app_t;
+typedef struct uws_req_s uws_req_t;
+typedef struct uws_res_s uws_res_t;
+
+uws_app_t *uws_create_app();
+void uws_app_get(uws_app_t *app, const char *pattern, void (*handler)(uws_res_t *, uws_req_t *));
+void uws_app_run(uws_app_t *);
+
+void uws_app_listen(uws_app_t *app, int port, void (*handler)(void *));
+
+void uws_res_end(uws_res_t *res, const char *data, size_t length);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif