event/DeferEvent: split the thread-safe version into new class InjectEvent

src/storage/plugins/CurlStorage.cxx

@@ -31,7 +31,7 @@
 #include "lib/curl/Escape.hxx"
 #include "lib/expat/ExpatParser.hxx"
 #include "fs/Traits.hxx"
-#include "event/DeferEvent.hxx"
+#include "event/InjectEvent.hxx"
 #include "thread/Mutex.hxx"
 #include "thread/Cond.hxx"
 #include "time/Parser.hxx"
@@ -84,7 +84,7 @@ CurlStorage::MapToRelativeUTF8(std::string_view uri_utf8) const noexcept
 }
 
 class BlockingHttpRequest : protected CurlResponseHandler {
-	DeferEvent defer_start;
+	InjectEvent defer_start;
 
 	std::exception_ptr postponed_error;
 
@@ -136,7 +136,7 @@ protected:
 	}
 
 private:
-	/* DeferEvent callback */
+	/* InjectEvent callback */
 	void OnDeferredStart() noexcept {
 		assert(!done);
 

src/storage/plugins/NfsStorage.cxx

@@ -32,7 +32,7 @@
 #include "thread/Cond.hxx"
 #include "event/Loop.hxx"
 #include "event/Call.hxx"
-#include "event/DeferEvent.hxx"
+#include "event/InjectEvent.hxx"
 #include "event/TimerEvent.hxx"
 #include "util/ASCII.hxx"
 #include "util/StringCompare.hxx"
@@ -61,7 +61,7 @@ class NfsStorage final
 
 	NfsConnection *connection;
 
-	DeferEvent defer_connect;
+	InjectEvent defer_connect;
 	TimerEvent reconnect_timer;
 
 	Mutex mutex;
@@ -115,7 +115,7 @@ public:
 		reconnect_timer.Schedule(std::chrono::seconds(5));
 	}
 
-	/* DeferEvent callback */
+	/* InjectEvent callback */
 	void OnDeferredConnect() noexcept {
 		if (state == State::INITIAL)
 			Connect();

src/storage/plugins/UdisksStorage.cxx

@@ -33,7 +33,7 @@
 #include "thread/Cond.hxx"
 #include "thread/SafeSingleton.hxx"
 #include "event/Call.hxx"
-#include "event/DeferEvent.hxx"
+#include "event/InjectEvent.hxx"
 #include "fs/AllocatedPath.hxx"
 #include "util/StringCompare.hxx"
 #include "util/RuntimeError.hxx"
@@ -62,7 +62,7 @@ class UdisksStorage final : public Storage {
 
 	std::exception_ptr mount_error;
 
-	DeferEvent defer_mount, defer_unmount;
+	InjectEvent defer_mount, defer_unmount;
 
 public:
 	template<typename B, typename I, typename IP>