X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=serverpool.cpp;h=68281996847fa5686158d50e33b588f198d330d6;hb=534764f026b82b144e974882c8e53c4cd8d21b68;hp=60a913d56146ecf58f7f9b72b82af0bb7adeb1f5;hpb=3b8ad87137cff7522ed12f4675d5ff26933bc94a;p=cubemap

diff --git a/serverpool.cpp b/serverpool.cpp
index 60a913d..6828199 100644
--- a/serverpool.cpp
+++ b/serverpool.cpp
@@ -1,9 +1,12 @@
-#include <google/protobuf/repeated_field.h>
+#include <unistd.h>
+#include <errno.h>
 
 #include "client.h"
+#include "log.h"
 #include "server.h"
 #include "serverpool.h"
 #include "state.pb.h"
+#include "util.h"
 
 using namespace std;
 
@@ -26,9 +29,16 @@ CubemapStateProto ServerPool::serialize()
 	for (int i = 0; i < num_servers; ++i) {
                 CubemapStateProto local_state = servers[i].serialize();
 
-		// The stream state should be identical between the servers, so we only store it once.
+		// The stream state should be identical between the servers, so we only store it once,
+		// save for the fds, which we keep around to distribute to the servers after re-exec.
 		if (i == 0) {
 			state.mutable_streams()->MergeFrom(local_state.streams());
+		} else {
+			assert(state.streams_size() == local_state.streams_size());
+			for (int j = 0; j < local_state.streams_size(); ++j) {
+				assert(local_state.streams(j).data_fds_size() == 1);
+				state.mutable_streams(j)->add_data_fds(local_state.streams(j).data_fds(0));
+			}
 		}
 		for (int j = 0; j < local_state.clients_size(); ++j) {
 			state.add_clients()->MergeFrom(local_state.clients(j));
@@ -55,10 +65,39 @@ void ServerPool::add_stream(const string &stream_id, size_t backlog_size, Stream
 	}
 }
 
-void ServerPool::add_stream_from_serialized(const StreamProto &stream)
+void ServerPool::add_stream_from_serialized(const StreamProto &stream, const vector<int> &data_fds)
 {
+	assert(!data_fds.empty());
+	string contents;
 	for (int i = 0; i < num_servers; ++i) {
-		servers[i].add_stream_from_serialized(stream);
+		int data_fd;
+		if (i < int(data_fds.size())) {
+			// Reuse one of the existing file descriptors.
+			data_fd = data_fds[i];
+		} else {
+			// Clone the first one.
+			if (contents.empty()) {
+				if (!read_tempfile(data_fds[0], &contents)) {
+					exit(1);
+				}
+			}
+			data_fd = make_tempfile(contents);
+		}
+
+		servers[i].add_stream_from_serialized(stream, data_fd);
+	}
+
+	// Close and delete any leftovers, if the number of servers was reduced.
+	for (size_t i = num_servers; i < data_fds.size(); ++i) {
+		int ret;
+		do {
+			ret = close(data_fds[i]);  // Implicitly deletes the file.
+		} while (ret == -1 && errno == EINTR);
+
+		if (ret == -1) {
+			log_perror("close");
+			// Can still continue.
+		}
 	}
 }