clean up some time_t and srand() uses

include/libtorrent/resolver.hpp

@@ -41,6 +41,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/io_service.hpp"
 #include "libtorrent/resolver_interface.hpp"
 #include "libtorrent/address.hpp"
+#include "libtorrent/time.hpp"
 
 namespace libtorrent
 {
@@ -59,7 +60,7 @@ private:
 
 	struct dns_cache_entry
 	{
-		time_t last_seen;
+		ptime last_seen;
 		std::vector<address> addresses;
 	};
 
@@ -71,8 +72,8 @@ private:
 	// max number of cached entries
 	int m_max_size;
 
-	// timeout (in seconds) of cache entries
+	// timeout of cache entries
-	int m_timeout;
+	time_duration m_timeout;
 };
 
 }

src/kademlia/node_id.cpp

@@ -96,8 +96,6 @@ int distance_exp(node_id const& n1, node_id const& n2)
 	return 0;
 }
 
-struct static_ { static_() { std::srand((unsigned int)std::time(0)); } } static__;
-
 node_id generate_id_impl(address const& ip_, boost::uint32_t r)
 {
 	boost::uint8_t* ip = 0;

src/kademlia/rpc_manager.cpp

@@ -48,7 +48,6 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <libtorrent/hasher.hpp>
 #include <libtorrent/session_settings.hpp> // for dht_settings
 #include <libtorrent/time.hpp>
-#include <time.h> // time()
 
 #ifdef TORRENT_DHT_VERBOSE_LOGGING
 #include <fstream>
@@ -174,8 +173,6 @@ rpc_manager::rpc_manager(node_id const& our_id
 	, m_allocated_observers(0)
 	, m_destructing(false)
 {
-	std::srand((unsigned int)time(0));
-
 #ifdef TORRENT_DHT_VERBOSE_LOGGING
 	TORRENT_LOG(rpc) << "Constructing";
 

src/resolver.cpp

@@ -43,7 +43,7 @@ namespace libtorrent
 		: m_ios(ios)
 		, m_resolver(ios)
 		, m_max_size(700)
-		, m_timeout(1200)
+		, m_timeout(seconds(1200))
 	{}
 
 	void resolver::on_lookup(error_code const& ec, tcp::resolver::iterator i
@@ -60,7 +60,7 @@ namespace libtorrent
 		}
 	
 		dns_cache_entry& ce = m_cache[hostname];
-		time_t now = time(NULL);
+		ptime now = time_now();
 		ce.last_seen = now;
 		ce.addresses.clear();
 		while (i != tcp::resolver::iterator())
@@ -81,8 +81,8 @@ namespace libtorrent
 			{
 				cache_t::iterator e = i;
 				++i;
-				if (i->second.last_seen < oldest->second.last_seen)
+				if (e->second.last_seen < oldest->second.last_seen)
-					oldest = i;
+					oldest = e;
 			}
 
 			// remove the oldest entry
@@ -99,7 +99,7 @@ namespace libtorrent
 		{
 			// keep cache entries valid for m_timeout seconds
 			if ((flags & resolver_interface::prefer_cache)
-				|| i->second.last_seen + m_timeout >= time(NULL))
+				|| i->second.last_seen + m_timeout >= time_now())
 			{
 				error_code ec;
 				m_ios.post(boost::bind(h, ec, i->second.addresses));

src/ut_metadata.cpp

@@ -196,9 +196,9 @@ namespace libtorrent { namespace
 
 		struct metadata_piece
 		{
-			metadata_piece(): num_requests(0), last_request(0) {}
+			metadata_piece(): num_requests(0), last_request(min_time()) {}
 			int num_requests;
-			time_t last_request;
+			ptime last_request;
 			boost::weak_ptr<ut_metadata_peer_plugin> source;
 			bool operator<(metadata_piece const& rhs) const
 			{ return num_requests < rhs.num_requests; }
@@ -523,8 +523,10 @@ namespace libtorrent { namespace
 		int piece = i - m_requested_metadata.begin();
 
 		// don't request the same block more than once every 3 seconds
-		time_t now = time(0);
+		ptime now = time_now();
-		if (now - m_requested_metadata[piece].last_request < 3) return -1;
+		if (m_requested_metadata[piece].last_request != min_time()
+			&& total_seconds(now - m_requested_metadata[piece].last_request) < 3)
+			return -1;
 
 		++m_requested_metadata[piece].num_requests;