system/Event{FD,Pipe}: throw exception on error

src/event/Loop.hxx

@@ -116,7 +116,11 @@ class EventLoop final : SocketMonitor
 	ThreadId thread = ThreadId::Null();
 
 public:
+	/**
+	 * Throws on error.
+	 */
 	explicit EventLoop(ThreadId _thread);
+
 	EventLoop():EventLoop(ThreadId::GetCurrent()) {}
 
 	~EventLoop() noexcept;

src/system/EventFD.cxx

@@ -20,7 +20,7 @@
 #include "config.h"
 #ifdef USE_EVENTFD
 #include "EventFD.hxx"
-#include "system/FatalError.hxx"
+#include "system/Error.hxx"
 #include "Compiler.h"
 
 #include <assert.h>
@@ -29,7 +29,7 @@
 EventFD::EventFD()
 {
 	if (!fd.CreateEventFD(0))
-		FatalSystemError("eventfd() failed");
+		throw MakeErrno("eventfd() failed");
 }
 
 bool

src/system/EventFD.hxx

@@ -25,13 +25,14 @@
 
 /**
  * A class that wraps eventfd().
- *
- * Errors in the constructor are fatal.
  */
 class EventFD {
 	UniqueFileDescriptor fd;
 
 public:
+	/**
+	 * Throws on error.
+	 */
 	EventFD();
 
 	int Get() const {

src/system/EventPipe.hxx

@@ -31,7 +31,11 @@ class EventPipe {
 	int fds[2];
 
 public:
+	/**
+	 * Throws on error.
+	 */
 	EventPipe();
+
 	~EventPipe();
 
 	EventPipe(const EventPipe &other) = delete;