Add semaphore for work wit multithread

.vscode/settings.json

@@ -4,6 +4,7 @@
         "iosfwd": "cpp",
         "fstream": "cpp",
         "*.tcc": "cpp",
-        "ostream": "cpp"
+        "ostream": "cpp",
+        "mutex": "cpp"
     }
 }

example/2023-07-27.log

@@ -0,0 +1,3 @@
+18:29:30 [EVENT] Start loging
+18:29:44 [EVENT] Start loging
+18:29:47 [EVENT] Start loging

lib/log.hpp

@@ -7,6 +7,7 @@
 #include <fstream>
 #include <time.h>
 #include <sys/stat.h>
+#include <mutex>
 
 using namespace std;
 
@@ -19,6 +20,7 @@ class log {
     struct tm * moment;
     uint day;
     string path;
+    mutex io;
 
     log (string _dir, bool _isKeepOpen = true, bool _printInConsole = false);
 

src/log.cpp

@@ -43,6 +43,7 @@ void log::setMoment() {
 }
 
 void log::put(string logline) {
+   io.lock();
    if (printInConsole) {
       cout << logline << endl;
    }
@@ -74,6 +75,7 @@ void log::put(string logline) {
    if (!isKeepOpen && logfile.is_open()) {
       loose();
    }
+   io.unlock();
 
 }