Add libhv and test http client

vendor/libhv/include/hv/Status.h

@@ -0,0 +1,56 @@
+#ifndef HV_STATUS_HPP_
+#define HV_STATUS_HPP_
+
+#include <atomic>
+
+namespace hv {
+
+class Status {
+public:
+    enum KStatus {
+        kNull           = 0,
+        kInitializing   = 1,
+        kInitialized    = 2,
+        kStarting       = 3,
+        kStarted        = 4,
+        kRunning        = 5,
+        kPause          = 6,
+        kStopping       = 7,
+        kStopped        = 8,
+        kDestroyed      = 9,
+    };
+
+    Status() {
+        status_ = kNull;
+    }
+    ~Status() {
+        status_ = kDestroyed;
+    }
+
+    KStatus status() {
+        return status_;
+    }
+
+    void setStatus(KStatus status) {
+        status_ = status;
+    }
+
+    bool isRunning() {
+        return status_ == kRunning;
+    }
+
+    bool isPause() {
+        return status_ == kPause;
+    }
+
+    bool isStopped() {
+        return status_ == kStopped;
+    }
+
+private:
+    std::atomic<KStatus> status_;
+};
+
+}
+
+#endif // HV_STATUS_HPP_