整理目录结构，编写CMakeLists.txt文件

platform/src/future.cpp

@@ -0,0 +1,70 @@
+#include "future.h"
+struct promise
+{
+    struct future f;
+    void * ctx;
+	promise_ctx_destroy_cb* cb_ctx_destroy;
+};
+struct future
+{
+    void * user;
+    future_success_cb * cb_success;
+    future_failed_cb * cb_failed;
+};
+
+inline struct future* promise_to_future(struct promise* p)
+{
+	return p->f;
+}
+inline struct promise* future_to_promise(struct future* f)
+{
+	return (struct promise*)f;
+}
+struct future* future_create(future_success_cb * cb_success, future_failed_cb * cb_failed,  void * user)
+{
+	struct promise* p=ALLOC(struct promise, 1);
+	p->f.user=user;
+	p->f.cb_success=cb_success;
+	p->f.cb_failed=cb_failed;
+	return p->f;
+}
+void future_destroy(struct future * f)
+{
+	struct promise* promise=future_to_promise(f);
+	if(promise->cb_ctx_destroy!=NULL)
+	{
+		promise->cb_ctx_destroy(promise);
+	}
+	memset(promise,0,sizeof(struct promise));
+	free(promise);
+    return;
+}
+
+void promise_failed(struct promise* p, enum e_future_error error, const char* what)
+{
+	p->f.cb_failed(error, what,p->f.user);
+	return;
+}
+void promise_success(struct promise* p, void *result)
+{
+	p->f.cb_success(result, p->f.user);
+	return;
+}
+void promise_set_ctx(struct promise* p,void* ctx, promise_ctx_destroy_cb* cb)
+{
+	p->ctx=ctx;
+	p->cb_ctx_destroy=cb;
+	return;
+}
+void* promise_get_ctx(struct promise* p)
+{
+	return p->ctx;
+}
+void* promise_dettach_ctx(struct promise* p)
+{
+	void* ctx=p->ctx;
+	p->ctx=NULL;
+	p->cb_ctx_destroy=NULL;
+	return ctx;
+}
+