update stats APIs to use TimePoint vs Duration correctly

[folly.git] / folly / Exception.h

diff --git a/folly/Exception.h b/folly/Exception.h
index fad0b691b969990bc8c4a5aa34b6ad5ef8349968..85bbeda47164dba61174a6cecf005b49a99d8bcb 100644 (file)
--- a/folly/Exception.h
+++ b/folly/Exception.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 Facebook, Inc.
+ * Copyright 2016 Facebook, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef FOLLY_EXCEPTION_H_
-#define FOLLY_EXCEPTION_H_
+#pragma once
 
 #include <errno.h>
 
@@ -23,10 +22,10 @@
 #include <stdexcept>
 #include <system_error>
 
-#include "folly/Conv.h"
-#include "folly/FBString.h"
-#include "folly/Likely.h"
-#include "folly/Portability.h"
+#include <folly/Conv.h>
+#include <folly/FBString.h>
+#include <folly/Likely.h>
+#include <folly/Portability.h>
 
 namespace folly {
 
@@ -37,24 +36,19 @@ namespace folly {
 // The *Explicit functions take an explicit value for errno.
 
 // Helper to throw std::system_error
-void throwSystemErrorExplicit(int err, const char*) FOLLY_NORETURN;
-inline void throwSystemErrorExplicit(int err, const char* msg) {
+[[noreturn]] inline void throwSystemErrorExplicit(int err, const char* msg) {
   throw std::system_error(err, std::system_category(), msg);
 }
 
 template <class... Args>
-void throwSystemErrorExplicit(int, Args&&... args) FOLLY_NORETURN;
-template <class... Args>
-void throwSystemErrorExplicit(int err, Args&&... args) {
+[[noreturn]] void throwSystemErrorExplicit(int err, Args&&... args) {
   throwSystemErrorExplicit(
       err, to<fbstring>(std::forward<Args>(args)...).c_str());
 }
 
 // Helper to throw std::system_error from errno and components of a string
 template <class... Args>
-void throwSystemError(Args&&... args) FOLLY_NORETURN;
-template <class... Args>
-void throwSystemError(Args&&... args) {
+[[noreturn]] void throwSystemError(Args&&... args) {
   throwSystemErrorExplicit(errno, std::forward<Args>(args)...);
 }
 
@@ -109,7 +103,18 @@ void checkFopenErrorExplicit(FILE* fp, int savedErrno, Args&&... args) {
   }
 }
 
-}  // namespace folly
+template <typename E, typename V, typename... Args>
+void throwOnFail(V&& value, Args&&... args) {
+  if (!value) {
+    throw E(std::forward<Args>(args)...);
+  }
+}
 
-#endif /* FOLLY_EXCEPTION_H_ */
+/**
+ * If cond is not true, raise an exception of type E.  E must have a ctor that
+ * works with const char* (a description of the failure).
+ */
+#define CHECK_THROW(cond, E) \
+  ::folly::throwOnFail<E>((cond), "Check failed: " #cond)
 
+}  // namespace folly