event/PollGroup: check _WIN32 instead of USE_WINSELECT

meson.build

@@ -172,12 +172,8 @@ conf.set('HAVE_PRCTL', is_linux)
 conf.set('USE_EVENTFD', is_linux and get_option('eventfd'))
 conf.set('USE_SIGNALFD', is_linux and get_option('signalfd'))
 
-if is_windows
-  conf.set('USE_WINSELECT', true)
-elif is_linux and get_option('epoll')
+if is_linux and get_option('epoll')
   conf.set('USE_EPOLL', true)
-else
-  conf.set('USE_POLL', true)
 endif
 
 if not get_option('syslog').disabled()

src/event/PollGroup.hxx

@@ -22,22 +22,24 @@
 
 #include "config.h"
 
-#ifdef USE_EPOLL
-#include "PollGroupEpoll.hxx"
-typedef PollResultEpoll PollResult;
-typedef PollGroupEpoll PollGroup;
-#endif
+#ifdef _WIN32
 
-#ifdef USE_WINSELECT
 #include "PollGroupWinSelect.hxx"
 typedef PollResultGeneric  PollResult;
 typedef PollGroupWinSelect PollGroup;
-#endif
 
-#ifdef USE_POLL
+#elif defined(USE_EPOLL)
+
+#include "PollGroupEpoll.hxx"
+typedef PollResultEpoll PollResult;
+typedef PollGroupEpoll PollGroup;
+
+#else
+
 #include "PollGroupPoll.hxx"
 typedef PollResultGeneric PollResult;
 typedef PollGroupPoll     PollGroup;
+
 #endif
 
 #endif

src/event/PollGroupPoll.cxx

@@ -17,10 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h"
-
-#ifdef USE_POLL
-
 #include "PollGroupPoll.hxx"
 
 #include <cassert>
@@ -89,5 +85,3 @@ PollGroupPoll::ReadEvents(PollResultGeneric &result, int timeout_ms) noexcept
 		}
 	}
 }
-
-#endif

src/event/PollGroupWinSelect.cxx

@@ -17,10 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h"
-
-#ifdef USE_WINSELECT
-
 #include "PollGroupWinSelect.hxx"
 
 static constexpr int EVENT_READ = 0;
@@ -165,5 +161,3 @@ PollGroupWinSelect::ReadEvents(PollResultGeneric &result,
 			i.second.events = 0;
 		}
 }
-
-#endif

src/event/meson.build

@@ -4,10 +4,16 @@ if uring_dep.found()
   event_sources += 'UringManager.cxx'
 endif
 
+if is_windows
+  event_sources += 'PollGroupWinSelect.cxx'
+elif is_linux and get_option('epoll')
+  # epoll support is header-only
+else
+  event_sources += 'PollGroupPoll.cxx'
+endif
+
 event = static_library(
   'event',
-  'PollGroupPoll.cxx',
-  'PollGroupWinSelect.cxx',
   'SignalMonitor.cxx',
   'TimerEvent.cxx',
   'IdleMonitor.cxx',