diff --git a/trunk/src/utest/srs_utest_kernel.cpp b/trunk/src/utest/srs_utest_kernel.cpp
index ae27d5858..f246bd99d 100644
--- a/trunk/src/utest/srs_utest_kernel.cpp
+++ b/trunk/src/utest/srs_utest_kernel.cpp
@@ -2632,26 +2632,26 @@ VOID TEST(KernelUtility, StringSplitUtils)
 {
     if (true) {
         vector<string> ss = srs_string_split("ossrs", "r");
-        EXPECT_EQ(2, ss.size());
+        EXPECT_EQ(2, (int)ss.size());
         EXPECT_STREQ("oss", ss.at(0).c_str());
         EXPECT_STREQ("s", ss.at(1).c_str());
     }
 
     if (true) {
         vector<string> ss = srs_string_split("ossrs", "");
-        EXPECT_EQ(1, ss.size());
+        EXPECT_EQ(1, (int)ss.size());
         EXPECT_STREQ("ossrs", ss.at(0).c_str());
     }
 
     if (true) {
         vector<string> ss = srs_string_split("ossrs", "live");
-        EXPECT_EQ(1, ss.size());
+        EXPECT_EQ(1, (int)ss.size());
         EXPECT_STREQ("ossrs", ss.at(0).c_str());
     }
 
     if (true) {
         vector<string> ss = srs_string_split("srs,live,rtc", ",");
-        EXPECT_EQ(3, ss.size());
+        EXPECT_EQ(3, (int)ss.size());
         EXPECT_STREQ("srs", ss.at(0).c_str());
         EXPECT_STREQ("live", ss.at(1).c_str());
         EXPECT_STREQ("rtc", ss.at(2).c_str());
@@ -2659,7 +2659,7 @@ VOID TEST(KernelUtility, StringSplitUtils)
 
     if (true) {
         vector<string> ss = srs_string_split("srs,,rtc", ",");
-        EXPECT_EQ(3, ss.size());
+        EXPECT_EQ(3, (int)ss.size());
         EXPECT_STREQ("srs", ss.at(0).c_str());
         EXPECT_STREQ("", ss.at(1).c_str());
         EXPECT_STREQ("rtc", ss.at(2).c_str());
@@ -2667,7 +2667,7 @@ VOID TEST(KernelUtility, StringSplitUtils)
 
     if (true) {
         vector<string> ss = srs_string_split("srs,,,rtc", ",");
-        EXPECT_EQ(4, ss.size());
+        EXPECT_EQ(4, (int)ss.size());
         EXPECT_STREQ("srs", ss.at(0).c_str());
         EXPECT_STREQ("", ss.at(1).c_str());
         EXPECT_STREQ("", ss.at(2).c_str());
@@ -2676,7 +2676,7 @@ VOID TEST(KernelUtility, StringSplitUtils)
 
     if (true) {
         vector<string> ss = srs_string_split("srs,live,", ",");
-        EXPECT_EQ(3, ss.size());
+        EXPECT_EQ(3, (int)ss.size());
         EXPECT_STREQ("srs", ss.at(0).c_str());
         EXPECT_STREQ("live", ss.at(1).c_str());
         EXPECT_STREQ("", ss.at(2).c_str());
@@ -2684,7 +2684,7 @@ VOID TEST(KernelUtility, StringSplitUtils)
 
     if (true) {
         vector<string> ss = srs_string_split(",live,rtc", ",");
-        EXPECT_EQ(3, ss.size());
+        EXPECT_EQ(3, (int)ss.size());
         EXPECT_STREQ("", ss.at(0).c_str());
         EXPECT_STREQ("live", ss.at(1).c_str());
         EXPECT_STREQ("rtc", ss.at(2).c_str());
@@ -2698,7 +2698,7 @@ VOID TEST(KernelUtility, StringSplitUtils)
 
     if (true) {
         vector<string> ss = srs_string_split("/xxx/yyy", "/");
-        EXPECT_EQ(3, ss.size());
+        EXPECT_EQ(3, (int)ss.size());
         EXPECT_STREQ("", ss.at(0).c_str());
         EXPECT_STREQ("xxx", ss.at(1).c_str());
         EXPECT_STREQ("yyy", ss.at(2).c_str());
diff --git a/trunk/src/utest/srs_utest_mp4.cpp b/trunk/src/utest/srs_utest_mp4.cpp
index bf32ccb67..a2537416b 100644
--- a/trunk/src/utest/srs_utest_mp4.cpp
+++ b/trunk/src/utest/srs_utest_mp4.cpp
@@ -464,7 +464,7 @@ VOID TEST(KernelMp4Test, UUIDBoxEncode)
         SrsMp4Box box;
         box.type = SrsMp4BoxTypeFREE;
         box.usertype.resize(8);
-        ASSERT_EQ(8, box.nb_bytes());
+        ASSERT_EQ(8, (int)box.nb_bytes());
         HELPER_ASSERT_SUCCESS(box.encode(&b));
     }
 
@@ -475,7 +475,7 @@ VOID TEST(KernelMp4Test, UUIDBoxEncode)
         SrsMp4Box box;
         box.type = SrsMp4BoxTypeUUID;
         box.usertype.resize(16);
-        ASSERT_EQ(24, box.nb_bytes());
+        ASSERT_EQ(24, (int)box.nb_bytes());
         HELPER_ASSERT_SUCCESS(box.encode(&b));
     }
 }
@@ -596,7 +596,7 @@ VOID TEST(KernelMp4Test, TFHDBox)
         if (true) {
             SrsMp4TrackFragmentHeaderBox box;
             box.track_id = 100;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -631,7 +631,7 @@ VOID TEST(KernelMp4Test, TFHDBox)
             box.default_sample_duration = 12;
             box.default_sample_size = 13;
             box.default_sample_flags = 14;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -667,7 +667,7 @@ VOID TEST(KernelMp4Test, TFDTBox)
         if (true) {
             SrsMp4TrackFragmentDecodeTimeBox box;
             box.base_media_decode_time = 100;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -694,7 +694,7 @@ VOID TEST(KernelMp4Test, TFDTBox)
             SrsMp4TrackFragmentDecodeTimeBox box;
             box.version = 1;
             box.base_media_decode_time = 100;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -724,7 +724,7 @@ VOID TEST(KernelMp4Test, TRUNBox)
 
         if (true) {
             SrsMp4TrackFragmentRunBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -754,7 +754,7 @@ VOID TEST(KernelMp4Test, TRUNBox)
             entry->sample_duration = 1000;
             box.entries.push_back(entry);
 
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -788,7 +788,7 @@ VOID TEST(KernelMp4Test, FreeBox)
         if (true) {
             SrsMp4FreeSpaceBox box(SrsMp4BoxTypeFREE);
             box.data.resize(4);
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -818,7 +818,7 @@ VOID TEST(KernelMp4Test, MOOVBox)
 
         if (true) {
             SrsMp4MovieBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -891,7 +891,7 @@ VOID TEST(KernelMp4Test, TREXBox)
             SrsMp4TrackExtendsBox box;
             box.track_ID = 1; box.default_sample_description_index = 2; box.default_sample_size = 3;
             box.default_sample_duration = 4; box.default_sample_flags = 5;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -933,7 +933,7 @@ VOID TEST(KernelMp4Test, TKHDBox)
         if (true) {
             SrsMp4TrackHeaderBox box;
             box.track_ID = 1;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -960,7 +960,7 @@ VOID TEST(KernelMp4Test, TKHDBox)
             SrsMp4TrackHeaderBox box;
             box.version = 1;
             box.track_ID = 1;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -990,7 +990,7 @@ VOID TEST(KernelMp4Test, ELSTBox)
 
         if (true) {
             SrsMp4EditListBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1018,7 +1018,7 @@ VOID TEST(KernelMp4Test, ELSTBox)
                 SrsMp4ElstEntry entry;
                 box.entries.push_back(entry);
             }
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1054,7 +1054,7 @@ VOID TEST(KernelMp4Test, MDHDBox)
 
         if (true) {
             SrsMp4MediaHeaderBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1081,7 +1081,7 @@ VOID TEST(KernelMp4Test, MDHDBox)
             box.set_language0('C');
             box.set_language1('N');
             box.set_language2('E');
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1136,7 +1136,7 @@ VOID TEST(KernelMp4Test, HDLRBox)
         if (true) {
             SrsMp4HandlerReferenceBox box;
             box.handler_type = SrsMp4HandlerTypeSOUN;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1162,7 +1162,7 @@ VOID TEST(KernelMp4Test, HDLRBox)
         if (true) {
             SrsMp4HandlerReferenceBox box;
             box.handler_type = SrsMp4HandlerTypeVIDE;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1189,7 +1189,7 @@ VOID TEST(KernelMp4Test, HDLRBox)
             SrsMp4HandlerReferenceBox box;
             box.handler_type = SrsMp4HandlerTypeVIDE;
             box.name = "srs";
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1247,7 +1247,7 @@ VOID TEST(KernelMp4Test, URLBox)
 
         if (true) {
             SrsMp4DataEntryUrlBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1271,7 +1271,7 @@ VOID TEST(KernelMp4Test, URLBox)
 
         if (true) {
             SrsMp4DataEntryUrnBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1304,7 +1304,7 @@ VOID TEST(KernelMp4Test, URLBox)
             SrsMp4DataReferenceBox box;
             SrsMp4DataEntryUrnBox* urn = new SrsMp4DataEntryUrnBox();
             box.append(urn);
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1341,7 +1341,7 @@ VOID TEST(KernelMp4Test, SampleDescBox)
         if (true) {
             SrsMp4VisualSampleEntry box;
             box.data_reference_index = 1;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1365,7 +1365,7 @@ VOID TEST(KernelMp4Test, SampleDescBox)
 
         if (true) {
             SrsMp4AvccBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1390,7 +1390,7 @@ VOID TEST(KernelMp4Test, SampleDescBox)
         if (true) {
             SrsMp4AudioSampleEntry box;
             box.data_reference_index = 1;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1420,7 +1420,7 @@ VOID TEST(KernelMp4Test, SpecificInfoBox)
         if (true) {
             SrsMp4DecoderSpecificInfo box;
             box.asc.resize(2);
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1444,7 +1444,7 @@ VOID TEST(KernelMp4Test, SpecificInfoBox)
 
         if (true) {
             SrsMp4DecoderConfigDescriptor box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1468,7 +1468,7 @@ VOID TEST(KernelMp4Test, SpecificInfoBox)
 
         if (true) {
             SrsMp4ES_Descriptor box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1498,7 +1498,7 @@ VOID TEST(KernelMp4Test, STSDBox)
         if (true) {
             SrsMp4SampleDescriptionBox box;
             box.entries.push_back(new SrsMp4SampleEntry());
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1523,7 +1523,7 @@ VOID TEST(KernelMp4Test, STSDBox)
         if (true) {
             SrsMp4DecodingTime2SampleBox box;
             box.entries.push_back(SrsMp4SttsEntry());
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1548,7 +1548,7 @@ VOID TEST(KernelMp4Test, STSDBox)
         if (true) {
             SrsMp4CompositionTime2SampleBox box;
             box.entries.push_back(SrsMp4CttsEntry());
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1572,7 +1572,7 @@ VOID TEST(KernelMp4Test, STSDBox)
 
         if (true) {
             SrsMp4SyncSampleBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1596,7 +1596,7 @@ VOID TEST(KernelMp4Test, STSDBox)
 
         if (true) {
             SrsMp4Sample2ChunkBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1620,7 +1620,7 @@ VOID TEST(KernelMp4Test, STSDBox)
 
         if (true) {
             SrsMp4ChunkOffsetBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1644,7 +1644,7 @@ VOID TEST(KernelMp4Test, STSDBox)
 
         if (true) {
             SrsMp4ChunkLargeOffsetBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1668,7 +1668,7 @@ VOID TEST(KernelMp4Test, STSDBox)
 
         if (true) {
             SrsMp4SampleSizeBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1693,7 +1693,7 @@ VOID TEST(KernelMp4Test, STSDBox)
         if (true) {
             SrsMp4UserDataBox box;
             box.data.resize(2);
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1717,7 +1717,7 @@ VOID TEST(KernelMp4Test, STSDBox)
 
         if (true) {
             SrsMp4SegmentIndexBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1741,7 +1741,7 @@ VOID TEST(KernelMp4Test, STSDBox)
 
         if (true) {
             SrsMp4MovieHeaderBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
@@ -1772,7 +1772,7 @@ VOID TEST(KernelMp4Test, STSDBox)
 
         if (true) {
             SrsMp4CompositionTime2SampleBox box;
-            EXPECT_EQ((int)sizeof(buf), box.nb_bytes());
+            EXPECT_EQ((int)sizeof(buf), (int)box.nb_bytes());
             HELPER_EXPECT_SUCCESS(box.encode(&b));
 
             stringstream ss;
diff --git a/trunk/src/utest/srs_utest_rtc.cpp b/trunk/src/utest/srs_utest_rtc.cpp
index 9c676d84b..962fca807 100644
--- a/trunk/src/utest/srs_utest_rtc.cpp
+++ b/trunk/src/utest/srs_utest_rtc.cpp
@@ -192,7 +192,7 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
     if (true) {
         SrsResourceManager manager("mgr");
         HELPER_EXPECT_SUCCESS(manager.start());
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
 
         MockResourceUnsubscribe* conn0 = new MockResourceUnsubscribe(&manager);
         conn0->unsubscribe_in_disposing = true;
@@ -208,7 +208,7 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
         // which should not cause the conn1 lost event.
         manager.remove(conn0);
         srs_usleep(0);
-        ASSERT_EQ(2, manager.size());
+        ASSERT_EQ(2, (int)manager.size());
 
         EXPECT_EQ(1, conn1->nn_before_dispose);
         EXPECT_EQ(1, conn1->nn_disposing); // Should get event.
@@ -221,7 +221,7 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
     if (true) {
         SrsResourceManager manager("mgr");
         HELPER_EXPECT_SUCCESS(manager.start());
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
 
         MockResourceUnsubscribe* conn0 = new MockResourceUnsubscribe(&manager);
         conn0->unsubscribe_in_before_dispose = true;
@@ -237,7 +237,7 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
         // which should not cause the conn1 lost event.
         manager.remove(conn0);
         srs_usleep(0);
-        ASSERT_EQ(2, manager.size());
+        ASSERT_EQ(2, (int)manager.size());
 
         EXPECT_EQ(1, conn1->nn_before_dispose); // Should get event.
         EXPECT_EQ(1, conn1->nn_disposing);
@@ -250,7 +250,7 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
     if (true) {
         SrsResourceManager manager("mgr");
         HELPER_EXPECT_SUCCESS(manager.start());
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
 
         MockResourceUnsubscribe* resource = new MockResourceUnsubscribe(&manager);
         resource->unsubscribe_in_before_dispose = true;
@@ -261,7 +261,7 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
 
         manager.remove(resource);
         srs_usleep(0);
-        ASSERT_EQ(0, manager.size());
+        ASSERT_EQ(0, (int)manager.size());
 
         EXPECT_EQ(1, result.nn_before_dispose);
         EXPECT_EQ(0, result.nn_disposing); // No disposing event, because we unsubscribe in before-dispose.
@@ -271,7 +271,7 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
     if (true) {
         SrsResourceManager manager("mgr");
         HELPER_EXPECT_SUCCESS(manager.start());
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
 
         MockResourceUnsubscribe* resource = new MockResourceUnsubscribe(&manager);
         manager.add(resource);
@@ -281,7 +281,7 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
 
         manager.remove(resource);
         srs_usleep(0);
-        ASSERT_EQ(0, manager.size());
+        ASSERT_EQ(0, (int)manager.size());
 
         EXPECT_EQ(1, result.nn_before_dispose);
         EXPECT_EQ(1, result.nn_disposing);
@@ -291,102 +291,102 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
     if (true) {
         SrsResourceManager manager("mgr");
         HELPER_EXPECT_SUCCESS(manager.start());
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
 
         MockResourceSelf* resource = new MockResourceSelf(&manager);
         resource->remove_in_disposing = true;
         manager.add(resource);
-        EXPECT_EQ(1, manager.size());
+        EXPECT_EQ(1, (int)manager.size());
 
         manager.remove(resource);
         srs_usleep(0);
-        ASSERT_EQ(0, manager.size());
+        ASSERT_EQ(0, (int)manager.size());
     }
 
     // When hooks before-dispose, remove itself again.
     if (true) {
         SrsResourceManager manager("mgr");
         HELPER_EXPECT_SUCCESS(manager.start());
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
 
         MockResourceSelf* resource = new MockResourceSelf(&manager);
         resource->remove_in_before_dispose = true;
         manager.add(resource);
-        EXPECT_EQ(1, manager.size());
+        EXPECT_EQ(1, (int)manager.size());
 
         manager.remove(resource);
         srs_usleep(0);
-        ASSERT_EQ(0, manager.size());
+        ASSERT_EQ(0, (int)manager.size());
     }
 
     // Cover all normal scenarios.
     if (true) {
         SrsResourceManager manager("mgr", true);
         HELPER_EXPECT_SUCCESS(manager.start());
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
 
         // Resource without id or name.
         manager.add_with_id("100", new MockSrsConnection());
         manager.add_with_id("101", new MockSrsConnection());
         manager.add_with_name("srs", new MockSrsConnection());
         manager.add_with_name("av", new MockSrsConnection());
-        ASSERT_EQ(4, manager.size());
+        ASSERT_EQ(4, (int)manager.size());
 
         manager.remove(manager.at(3));
         manager.remove(manager.at(2));
         manager.remove(manager.at(1));
         manager.remove(manager.at(0));
         srs_usleep(0);
-        ASSERT_EQ(0, manager.size());
+        ASSERT_EQ(0, (int)manager.size());
     }
 
     // Callback: Remove worker when its master is disposing.
     if (true) {
         SrsResourceManager manager("mgr");
         HELPER_EXPECT_SUCCESS(manager.start());
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
 
         MockResourceHookOwner* master = new MockResourceHookOwner(&manager);
         manager.add(master);
-        EXPECT_EQ(1, manager.size());
+        EXPECT_EQ(1, (int)manager.size());
 
         MockResourceHookOwner* worker = new MockResourceHookOwner(&manager);
         worker->owner_ = master; // When disposing master, worker will hook the event and remove itself.
         manager.add(worker);
-        EXPECT_EQ(2, manager.size());
+        EXPECT_EQ(2, (int)manager.size());
 
         manager.remove(master);
         srs_usleep(0); // Trigger the disposing.
 
         // Both master and worker should be disposed.
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
     }
 
     // Normal scenario, free object by manager.
     if (true) {
         SrsResourceManager manager("mgr");
         HELPER_EXPECT_SUCCESS(manager.start());
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
 
         MockSrsConnection* conn = new MockSrsConnection();
         manager.add(conn);
-        EXPECT_EQ(1, manager.size()); EXPECT_FALSE(manager.empty());
+        EXPECT_EQ(1, (int)manager.size()); EXPECT_FALSE(manager.empty());
 
         manager.remove(conn);
         srs_usleep(0); // Switch context for manager to dispose connections.
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
     }
 
     // Resource with id or name.
     if (true) {
         SrsResourceManager manager("mgr");
         HELPER_EXPECT_SUCCESS(manager.start());
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
 
         // Resource without id or name.
         MockSrsConnection* conn = new MockSrsConnection();
         manager.add(conn);
-        ASSERT_EQ(1, manager.size());
+        ASSERT_EQ(1, (int)manager.size());
         EXPECT_TRUE(manager.at(0));
         EXPECT_TRUE(!manager.at(1));
         EXPECT_TRUE(!manager.find_by_id("100"));
@@ -394,34 +394,34 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
 
         manager.remove(conn);
         srs_usleep(0);
-        ASSERT_EQ(0, manager.size());
+        ASSERT_EQ(0, (int)manager.size());
 
         // Resource with id.
         if (true) {
             MockSrsConnection* id = new MockSrsConnection();
             manager.add_with_id("100", id);
-            EXPECT_EQ(1, manager.size());
+            EXPECT_EQ(1, (int)manager.size());
             EXPECT_TRUE(manager.find_by_id("100"));
             EXPECT_TRUE(!manager.find_by_id("101"));
             EXPECT_TRUE(!manager.find_by_name("100"));
 
             manager.remove(id);
             srs_usleep(0);
-            ASSERT_EQ(0, manager.size());
+            ASSERT_EQ(0, (int)manager.size());
         }
 
         // Resource with name.
         if (true) {
             MockSrsConnection* name = new MockSrsConnection();
             manager.add_with_name("srs", name);
-            EXPECT_EQ(1, manager.size());
+            EXPECT_EQ(1, (int)manager.size());
             EXPECT_TRUE(manager.find_by_name("srs"));
             EXPECT_TRUE(!manager.find_by_name("srs0"));
             EXPECT_TRUE(!manager.find_by_id("srs"));
 
             manager.remove(name);
             srs_usleep(0);
-            ASSERT_EQ(0, manager.size());
+            ASSERT_EQ(0, (int)manager.size());
         }
 
         // Resource with id and name.
@@ -431,7 +431,7 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
             manager.add_with_id("200", id_name);
             manager.add_with_name("srs", id_name);
             manager.add_with_name("av", id_name);
-            EXPECT_EQ(1, manager.size());
+            EXPECT_EQ(1, (int)manager.size());
             EXPECT_TRUE(manager.find_by_name("srs"));
             EXPECT_TRUE(manager.find_by_name("av"));
             EXPECT_TRUE(manager.find_by_id("100"));
@@ -441,7 +441,7 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
 
             manager.remove(id_name);
             srs_usleep(0);
-            ASSERT_EQ(0, manager.size());
+            ASSERT_EQ(0, (int)manager.size());
         }
 
         // Resource with same id or name.
@@ -456,11 +456,11 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
 
             manager.remove(conn0);
             srs_usleep(0);
-            ASSERT_EQ(1, manager.size());
+            ASSERT_EQ(1, (int)manager.size());
 
             manager.remove(conn1);
             srs_usleep(0);
-            ASSERT_EQ(0, manager.size());
+            ASSERT_EQ(0, (int)manager.size());
         }
     }
 
@@ -468,31 +468,31 @@ VOID TEST(KernelRTCTest, ConnectionManagerTest)
     if (true) {
         SrsResourceManager manager("mgr");
         HELPER_EXPECT_SUCCESS(manager.start());
-        EXPECT_EQ(0, manager.size()); EXPECT_TRUE(manager.empty());
+        EXPECT_EQ(0, (int)manager.size()); EXPECT_TRUE(manager.empty());
 
         if (true) { // First connection, which will switch context when deleting.
             MockSrsConnection* conn = new MockSrsConnection();
             conn->do_switch = true;
             manager.add(conn);
-            EXPECT_EQ(1, manager.size()); EXPECT_EQ(0, manager.zombies_.size());
+            EXPECT_EQ(1, (int)manager.size()); EXPECT_EQ(0, manager.zombies_.size());
 
             manager.remove(conn); // Remove conn to zombies.
-            EXPECT_EQ(1, manager.size()); EXPECT_EQ(1, manager.zombies_.size());
+            EXPECT_EQ(1, (int)manager.size()); EXPECT_EQ(1, manager.zombies_.size());
 
             srs_usleep(0); // Switch to manager coroutine to try to free zombies.
-            EXPECT_EQ(0, manager.size()); EXPECT_EQ(0, manager.zombies_.size());
+            EXPECT_EQ(0, (int)manager.size()); EXPECT_EQ(0, manager.zombies_.size());
         }
 
         if (true) { // Now the previous conn switch back to here, and lost the signal.
             MockSrsConnection* conn = new MockSrsConnection();
             manager.add(conn);
-            EXPECT_EQ(1, manager.size()); EXPECT_EQ(0, manager.zombies_.size());
+            EXPECT_EQ(1, (int)manager.size()); EXPECT_EQ(0, manager.zombies_.size());
 
             manager.remove(conn); // Remove conn to zombies, signal is lost.
-            EXPECT_EQ(1, manager.size()); EXPECT_EQ(1, manager.zombies_.size());
+            EXPECT_EQ(1, (int)manager.size()); EXPECT_EQ(1, manager.zombies_.size());
 
             srs_usleep(0); // Switch to manager, but no signal is triggered before, so conn will be freed by loop.
-            EXPECT_EQ(0, manager.size()); EXPECT_EQ(0, manager.zombies_.size());
+            EXPECT_EQ(0, (int)manager.size()); EXPECT_EQ(0, manager.zombies_.size());
         }
     }
 }