fix osx build (#804)

fix osx build with asserts enabled

include/libtorrent/assert.hpp

@@ -64,10 +64,6 @@ TORRENT_EXPORT void print_backtrace(char* out, int len, int max_depth = 0);
 TORRENT_EXPORT void assert_print(char const* fmt, ...) TORRENT_FORMAT(1,2);
 
 // internal
-#if (TORRENT_USE_ASSERTS || defined TORRENT_ASIO_DEBUGGING) \
-	&& !defined TORRENT_PRODUCTION_ASSERTS
-TORRENT_NO_RETURN
-#endif
 TORRENT_EXPORT void assert_fail(const char* expr, int line
 	, char const* file, char const* function, char const* val, int kind = 0);
 

src/assert.cpp

@@ -245,9 +245,13 @@ TORRENT_EXPORT void assert_print(char const* fmt, ...)
 #endif
 }
 
-#ifndef TORRENT_PRODUCTION_ASSERTS
-TORRENT_NO_RETURN
+// we deliberately don't want asserts to be marked as no-return, since that
+// would trigger warnings in debug builds of any code coming after the assert
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmissing-noreturn"
 #endif
+
 TORRENT_EXPORT void assert_fail(char const* expr, int line
 	, char const* file, char const* function, char const* value, int kind)
 {
@@ -300,6 +304,10 @@ TORRENT_EXPORT void assert_fail(char const* expr, int line
 #endif
 }
 
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
 #elif !TORRENT_USE_ASSERTS
 
 // these are just here to make it possible for a client that built with debug

src/block_cache.cpp

@@ -1341,7 +1341,7 @@ void block_cache::insert_blocks(cached_piece_entry* pe, int block, file::iovec_t
 		TORRENT_ASSERT(iov[i].iov_base);
 
 #ifdef TORRENT_DEBUG_BUFFERS
-		TORRENT_PIECE_ASSERT(is_disk_buffer((char*)iov[i].iov_base), pe);
+		TORRENT_PIECE_ASSERT(is_disk_buffer(static_cast<char*>(iov[i].iov_base)), pe);
 #endif
 
 		if (pe->blocks[block].buf && (flags & blocks_inc_refcount))

src/choker.cpp

@@ -359,7 +359,7 @@ namespace libtorrent
 				, end(peers.end()); i != end; ++i)
 			{
 				peer_connection const& p = **i;
-				int rate = int(p.uploaded_in_last_round()
+				int const rate = int(p.uploaded_in_last_round()
 					* 1000 / total_milliseconds(unchoke_interval));
 
 				if (rate < rate_threshold) break;
@@ -383,7 +383,7 @@ namespace libtorrent
 		if (sett.get_int(settings_pack::seed_choking_algorithm)
 			== settings_pack::round_robin)
 		{
-			int pieces = sett.get_int(settings_pack::seeding_piece_quota);
+			int const pieces = sett.get_int(settings_pack::seeding_piece_quota);
 
 			std::partial_sort(peers.begin(), peers.begin()
 				+ (std::min)(upload_slots, int(peers.size())), peers.end()
@@ -405,12 +405,12 @@ namespace libtorrent
 		}
 		else
 		{
-			TORRENT_ASSERT(false);
-
-			int pieces = sett.get_int(settings_pack::seeding_piece_quota);
+			int const pieces = sett.get_int(settings_pack::seeding_piece_quota);
 			std::partial_sort(peers.begin(), peers.begin()
 				+ (std::min)(upload_slots, int(peers.size())), peers.end()
 				, boost::bind(&unchoke_compare_rr, _1, _2, pieces));
+
+			TORRENT_ASSERT(false);
 		}
 
 		return upload_slots;

src/kademlia/traversal_algorithm.cpp

@@ -282,7 +282,7 @@ void traversal_algorithm::traverse(node_id const& id, udp::endpoint addr)
 
 void traversal_algorithm::finished(observer_ptr o)
 {
-#ifdef TORRENT_DEBUG
+#if TORRENT_USE_ASSERTS
 	std::vector<observer_ptr>::iterator i = std::find(
 		m_results.begin(), m_results.end(), o);
 

src/part_file.cpp

@@ -296,7 +296,8 @@ namespace libtorrent
 		TORRENT_UNUSED(ec);
 
 		// not implemented
-		TORRENT_ASSERT(false);
+		ec.assign(boost::system::errc::operation_not_supported
+			, boost::system::generic_category());
 	}
 
 	void part_file::export_file(file& f, boost::int64_t offset, boost::int64_t size, error_code& ec)

src/peer_connection.cpp

@@ -3043,10 +3043,11 @@ namespace libtorrent
 		TORRENT_ASSERT(p.start == j->d.io.offset);
 		TORRENT_ASSERT(picker.num_peers(block_finished) == 0);
 
-		if (j->ret == -1 && j->error.ec == boost::system::errc::operation_canceled)
+		if (j->ret == -1
+			&& j->error.ec == boost::system::errc::operation_canceled)
 		{
-			TORRENT_ASSERT(false); // how do we get here?
 			picker.mark_as_canceled(block_finished, peer_info_struct());
+			TORRENT_ASSERT(false); // how do we get here?
 			return;
 		}
 //		fprintf(stderr, "peer_connection mark_as_finished peer: %p piece: %d block: %d\n"

src/peer_list.cpp

@@ -85,7 +85,7 @@ namespace
 		tcp::endpoint const& m_ep;
 	};
 
-#if TORRENT_USE_ASSERTS
+#ifndef TORRENT_DISABLE_INVARIANT_CHECKS
 	struct match_peer_connection
 	{
 		match_peer_connection(peer_connection_interface const& c) : m_conn(c) {}
@@ -98,7 +98,9 @@ namespace
 
 		peer_connection_interface const& m_conn;
 	};
+#endif
 
+#if TORRENT_USE_ASSERTS
 	struct match_peer_connection_or_endpoint
 	{
 		match_peer_connection_or_endpoint(peer_connection_interface const& c) : m_conn(c) {}

test/test_piece_picker.cpp

@@ -182,7 +182,7 @@ boost::shared_ptr<piece_picker> setup_picker(
 		TEST_CHECK(avail == availability_vec[i]);
 	}
 
-#if defined TORRENT_DEBUG && !defined TORRENT_DISABLE_INVARIANT_CHECKS
+#if TORRENT_USE_INVARIANT_CHECKS
 	p->check_invariant();
 #endif
 	return p;
@@ -191,7 +191,7 @@ boost::shared_ptr<piece_picker> setup_picker(
 bool verify_pick(boost::shared_ptr<piece_picker> p
 	, std::vector<piece_block> const& picked, bool allow_multi_blocks = false)
 {
-#if defined TORRENT_DEBUG && !defined TORRENT_DISABLE_INVARIANT_CHECKS
+#if TORRENT_USE_INVARIANT_CHECKS
 	p->check_invariant();
 #endif
 	if (!allow_multi_blocks)