Merge remote-tracking branch 'origin/timers' into refactor

.gitignore

@@ -1 +1,2 @@
 test/test
+test/*.txt

.vscode/settings.json

@@ -27,6 +27,7 @@
         "bitset": "cpp",
         "algorithm": "cpp",
         "string": "cpp",
-        "string_view": "cpp"
+        "string_view": "cpp",
+        "fstream": "cpp"
     }
 }

README.md

@@ -14,6 +14,7 @@ A C++ library for event-driven asynchronous multi-threaded programming.
 - Typed events (on, emit, off)
 - Event loops
 - Multiple parallel execution loops
+- Asynchronous file IO
 ## Installation
 
 Just download the latest release and unzip it into your project. 
@@ -25,6 +26,8 @@ Just download the latest release and unzip it into your project.
 #include "asynco/lib/event.hpp"     // event
 #include "asynco/lib/rotor.hpp"     // interval, timeout
 #include "asynco/lib/runner.hpp"    // for own loop
+#include "asynco/lib/filesystem.hpp"// for async read and write files
+
 using namespace marcelb;
 
 ```
@@ -224,6 +227,31 @@ myclass.on("constructed", [] (int i) {
 });
 
 ```
+
+Asynchronous file IO
+
+```c++
+string data_;
+
+asynco_read("test.txt", [&data_] (string data, exception* error) {
+    if (error) {
+        cout << "Error " << error->what() << endl;
+    } else {
+        cout << "Data " << endl << data << endl;
+        data_ = data;
+        cout << "Data_" << data_ << endl;
+    }
+});
+
+asynco_write("test1.txt", "Hello night", [] (exception* error) {
+    if (error) {
+        cout << "Error " << error->what() << endl;
+    } else {
+        cout << "Write successfuly" << endl;
+    }
+});
+```
+
 ## License
 
 [APACHE 2.0](http://www.apache.org/licenses/LICENSE-2.0/)

lib/filesystem.hpp

@@ -0,0 +1,111 @@
+#ifndef _ASYNCO_FS_
+#define _ASYNCO_FS_
+
+#include "asynco.hpp"
+
+
+#include <fstream>
+#include <iostream>
+
+using namespace std;
+
+namespace marcelb {
+
+/**
+ * Asynchronous file reading with callback after read complete
+*/
+template<typename Callback>
+void asynco_read(string path, Callback&& callback) {
+    asynco( [&path, callback] () {
+        string content;
+        try {
+            string line;
+            ifstream file (path);
+            if (file.is_open()) {
+                line.clear();
+                while ( getline (file,line) ) {
+                    content += line + "\n";
+                }
+                file.close();
+            }
+
+            else {
+                throw runtime_error("Unable to open file"); 
+            }
+
+            callback(content, nullptr);
+        } catch(exception& error) {
+            callback(content, &error);
+        }
+    });
+}
+
+
+/**
+ * Asynchronous file reading
+*/
+future<string> asynco_read(string path) {
+    return asynco( [&path] () {
+        string content;
+        string line;
+        ifstream file (path);
+        if (file.is_open()) {
+            line.clear();
+            while ( getline (file,line) ) {
+                content += line + "\n";
+            }
+            file.close();
+            return content;
+        }
+
+        else {
+            throw runtime_error("Unable to open file"); 
+        }
+    });
+}
+
+/**
+ * Asynchronous file writing with callback after write complete
+*/
+template<typename Callback>
+void asynco_write(string path, string content, Callback&& callback) {
+    asynco( [&path, &content, callback] () {
+        try {
+            ofstream file (path);
+            if (file.is_open()) {
+                file << content;
+                file.close();
+            }
+            else {
+                throw runtime_error("Unable to open file"); 
+            }
+
+            callback(nullptr);
+        } catch(exception& error) {
+            callback(&error);
+        }
+    });
+}
+
+
+/**
+ * Asynchronous file writing with callback after write complete
+*/
+future<void> asynco_write(string path, string content) {
+    return asynco( [&path, &content] () {
+        ofstream file (path);
+        if (file.is_open()) {
+            file << content;
+            file.close();
+            return;
+        }
+        else {
+            throw runtime_error("Unable to open file"); 
+        }
+    });
+}
+
+
+}
+
+#endif

lib/rotor.hpp

@@ -22,6 +22,12 @@ int64_t rtime_ms() {
         .count();
 }
 
+int64_t rtime_us() {
+    return chrono::duration_cast<chrono::microseconds>(chrono::system_clock::now()
+        .time_since_epoch())
+        .count();
+}
+
 /**
  * Intern class for timer async loop
 */
@@ -38,7 +44,7 @@ class timer_core {
      * Timer constructor, receives a callback function and time
     */
     timer_core( function<void()> _callback, int64_t _time, bool _repeat):
-        callback(_callback), init(rtime_ms()), time(_time), repeat(_repeat), stop(false) {
+        callback(_callback), init(rtime_us()), time(_time*1000), repeat(_repeat), stop(false) {
     }
 
     /**
@@ -83,7 +89,7 @@ class rotor {
                 else if (expired(tcores[i])) {
                     _asyncon.put_task(tcores[i]->callback);
                     if (tcores[i]->repeat) {
-                        tcores[i]->init = rtime_ms();
+                        tcores[i]->init = rtime_us();
                     }
                     else {
                         remove(i);
@@ -91,7 +97,7 @@ class rotor {
                     }
                 }
             }
-            this_thread::sleep_for(chrono::milliseconds(sampling));
+            this_thread::sleep_for(chrono::microseconds(sampling));
         } 
     }
 
@@ -99,7 +105,7 @@ class rotor {
      * The method checks whether the time event has expired
     */
     bool expired(shared_ptr<timer_core> tcore) {
-        return rtime_ms() - tcore->init >= tcore->time;
+        return rtime_us() - tcore->init >= tcore->time;
     }
 
     /**

test/test.cpp

@@ -1,8 +1,9 @@
 #define NUM_OF_RUNNERS 2
 
-#include "../lib/asynco.hpp"
-#include "../lib/event.hpp"
-#include "../lib/rotor.hpp"
+// #include "../lib/asynco.hpp"
+// #include "../lib/event.hpp"
+// #include "../lib/rotor.hpp"
+#include "../lib/filesystem.hpp"
 
 #include <iostream>
 #include <unistd.h>
@@ -11,29 +12,29 @@ using namespace std;
 using namespace marcelb;
 using namespace this_thread;
 
-void sleep_to (int _time) {
-    promise<void> _promise;
-    timeout t( [&]() {
-        _promise.set_value();
-    }, _time);
+// void sleep_to (int _time) {
+//     promise<void> _promise;
+//     timeout t( [&]() {
+//         _promise.set_value();
+//     }, _time);
 
-    return _promise.get_future().get();
-}
+//     return _promise.get_future().get();
+// }
 
-void promise_reject (int _time) {
-    promise<void> _promise;
-    timeout t( [&]() {
-        try {
-            // simulate except
-            throw runtime_error("Error simulation");
-            _promise.set_value();
-        } catch (...) {
-            _promise.set_exception(current_exception());
-        }
-    }, _time);
+// void promise_reject (int _time) {
+//     promise<void> _promise;
+//     timeout t( [&]() {
+//         try {
+//             // simulate except
+//             throw runtime_error("Error simulation");
+//             _promise.set_value();
+//         } catch (...) {
+//             _promise.set_exception(current_exception());
+//         }
+//     }, _time);
 
-    return _promise.get_future().get();
-}
+//     return _promise.get_future().get();
+// }
 
 void notLambdaFunction() {
     cout << "Call to not lambda function" << endl;
@@ -48,15 +49,15 @@ class clm {
 
 // ------------------ EXTEND OWN CLASS WITH EVENTS -------------------
 
-class myOwnClass : public event<int> {
-    public:
-    myOwnClass() : event() {};
-};
+// class myOwnClass : public event<int> {
+//     public:
+//     myOwnClass() : event() {};
+// };
 
 
 int main () {
 
-    auto start = rtime_ms();
+    // auto start = rtime_ms();
 
     // --------------- TIME ASYNCHRONOUS FUNCTIONS --------------
 
@@ -65,21 +66,25 @@ int main () {
     */
 
     interval( [&] () {
-        cout << "interval "  << rtime_ms() - start << endl;
+        cout << "interval 1: "  << rtime_ms() - start << endl;
+    }, 50);
+
+    interval( [&] () {
+        cout << "interval 1: "  << rtime_ms() - start << endl;
+    }, 100);
+
+    interval( [&] () {
+        cout << "interval 2: " << rtime_ms() - start << endl;
     }, 200);
 
     interval( [&] () {
-        cout << "interval " << rtime_ms() - start << endl;
-    }, 200);
-
-    interval( [&] () {
-        cout << "interval " << rtime_ms() - start << endl;
-    }, 200);
+        cout << "interval 3: " << rtime_ms() - start << endl;
+    }, 300);
 
 
     interval( [&] () {
-        cout << "interval "  << rtime_ms() - start << endl;
-    }, 200);
+        cout << "interval 4: "  << rtime_ms() - start << endl;
+    }, 400);
 
     // interval inter1 ([&]() {
     //     cout << "interval prvi " << rtime_ms() - start << endl;
@@ -274,6 +279,45 @@ int main () {
     //     cout << "Constructed " << i  << endl;
     // });
 
+    string data_;
+
+    // asynco_read("test.txt", [&data_] (string data, exception* error) {
+    //     if (error) {
+    //         cout << "Error " << error->what() << endl;
+    //     } else {
+    //         cout << "Data " << endl << data << endl;
+    //         data_ = data;
+    //         cout << "Data_" << data_ << endl;
+    //     }
+    // });
+
+    // auto data = asynco_read("test4.txt");
+
+    // try {
+    //     data_ = wait(data);
+    //     cout << "data" << data_ << endl;
+    // } catch (exception& err) {
+    //     cout << err.what() << endl;
+    // }
+
+    // asynco_write("test1.txt", "Hello night", [] (exception* error) {
+    //     if (error) {
+    //         cout << "Error " << error->what() << endl;
+    //     } else {
+    //         cout << "Write successfuly" << endl;
+    //     }
+    // });
+
+    auto status = asynco_write("test1.txt", "Hello night");
+
+
+    // try {
+    //     wait(status);
+    // } catch (exception& err) {
+    //     cout << err.what() << endl;
+    // }
+
+    cout << "Sleep" << endl;
     sleep(100000); // only for testing
 
     return 0;