Reduce the number of times `unix_time_update` is called.

Reduced by, e.g.:
* `file_transfer_test`: 33% of the `clock_gettime` calls.
* `tox_many_test`: 53% of the `clock_gettime` calls.

Other tests will see similar improvements. Real world applications will
be closer to 40-50% improvement, since tox_many_test has 100 nodes, while
file_transfer_test has 2 nodes.

7 files changed, 5 insertions, 20 deletions

diff --git a/toxcore/DHT.c b/toxcore/DHT.c
index 37dd9385..94928b75 100644
--- a/toxcore/DHT.c
+++ b/toxcore/DHT.c
@@ -2690,9 +2690,6 @@ static int cryptopacket_handle(void *object, IP_Port source, const uint8_t *pack
 
 DHT *new_dht(const Logger *log, Networking_Core *net, bool holepunching_enabled)
 {
-    /* init time */
-    unix_time_update();
-
     if (net == nullptr) {
         return nullptr;
     }
@@ -2741,8 +2738,6 @@ DHT *new_dht(const Logger *log, Networking_Core *net, bool holepunching_enabled)
 
 void do_dht(DHT *dht)
 {
-    unix_time_update();
-
     if (dht->last_run == unix_time()) {
         return;
     }
@@ -2963,8 +2958,6 @@ int dht_load(DHT *dht, const uint8_t *data, uint32_t length)
  */
 bool dht_isconnected(const DHT *dht)
 {
-    unix_time_update();
-
     for (uint32_t i = 0; i < LCLIENT_LIST; ++i) {
         const Client_data *const client = &dht->close_clientlist[i];
 
@@ -2982,8 +2975,6 @@ bool dht_isconnected(const DHT *dht)
  */
 bool dht_non_lan_connected(const DHT *dht)
 {
-    unix_time_update();
-
     for (uint32_t i = 0; i < LCLIENT_LIST; ++i) {
         const Client_data *const client = &dht->close_clientlist[i];
 
diff --git a/toxcore/Messenger.c b/toxcore/Messenger.c
index acf9f806..ab341e61 100644
--- a/toxcore/Messenger.c
+++ b/toxcore/Messenger.c
@@ -2603,8 +2603,6 @@ void do_messenger(Messenger *m, void *userdata)
         }
     }
 
-    unix_time_update();
-
     if (!m->options.udp_disabled) {
         networking_poll(m->net, userdata);
         do_dht(m->dht);
diff --git a/toxcore/TCP_client.c b/toxcore/TCP_client.c
index 381d9b80..d6a27c95 100644
--- a/toxcore/TCP_client.c
+++ b/toxcore/TCP_client.c
@@ -985,8 +985,6 @@ static int do_confirmed_TCP(TCP_Client_Connection *conn, void *userdata)
  */
 void do_TCP_connection(TCP_Client_Connection *tcp_connection, void *userdata)
 {
-    unix_time_update();
-
     if (tcp_connection->status == TCP_CLIENT_DISCONNECTED) {
         return;
     }
diff --git a/toxcore/TCP_server.c b/toxcore/TCP_server.c
index cc59d088..207a5107 100644
--- a/toxcore/TCP_server.c
+++ b/toxcore/TCP_server.c
@@ -1424,8 +1424,6 @@ static void do_TCP_epoll(TCP_Server *tcp_server)
 
 void do_TCP_server(TCP_Server *tcp_server)
 {
-    unix_time_update();
-
 #ifdef TCP_SERVER_USE_EPOLL
     do_TCP_epoll(tcp_server);
 
diff --git a/toxcore/net_crypto.c b/toxcore/net_crypto.c
index 8f5fd507..bd214b91 100644
--- a/toxcore/net_crypto.c
+++ b/toxcore/net_crypto.c
@@ -2925,8 +2925,6 @@ void load_secret_key(Net_Crypto *c, const uint8_t *sk)
  */
 Net_Crypto *new_net_crypto(const Logger *log, DHT *dht, TCP_Proxy_Info *proxy_info)
 {
-    unix_time_update();
-
     if (dht == nullptr) {
         return nullptr;
     }
@@ -3016,7 +3014,6 @@ uint32_t crypto_run_interval(const Net_Crypto *c)
 /* Main loop. */
 void do_net_crypto(Net_Crypto *c, void *userdata)
 {
-    unix_time_update();
     kill_timedout(c, userdata);
     do_tcp(c, userdata);
     send_crypto_packets(c);
diff --git a/toxcore/network.c b/toxcore/network.c
index 68ca43e5..08bec13a 100644
--- a/toxcore/network.c
+++ b/toxcore/network.c
@@ -641,8 +641,6 @@ void networking_poll(Networking_Core *net, void *userdata)
         return;
     }
 
-    unix_time_update();
-
     IP_Port ip_port;
     uint8_t data[MAX_UDP_PACKET_SIZE];
     uint32_t length;
diff --git a/toxcore/tox.c b/toxcore/tox.c
index cd1b71f0..879b5c09 100644
--- a/toxcore/tox.c
+++ b/toxcore/tox.c
@@ -38,6 +38,7 @@
 #include "Messenger.h"
 #include "group.h"
 #include "logger.h"
+#include "mono_time.h"
 
 #include "../toxencryptsave/defines.h"
 
@@ -335,6 +336,8 @@ Tox *tox_new(const struct Tox_Options *options, Tox_Err_New *error)
         return nullptr;
     }
 
+    unix_time_update();
+
     Messenger_Options m_options = {0};
 
     bool load_savedata_sk = false, load_savedata_tox = false;
@@ -653,6 +656,8 @@ uint32_t tox_iteration_interval(const Tox *tox)
 
 void tox_iterate(Tox *tox, void *user_data)
 {
+    unix_time_update();
+
     Messenger *m = tox->m;
     struct Tox_Userdata tox_data = { tox, user_data };
     do_messenger(m, &tox_data);