Fixed examples

Added clear_traceback method which clears the error stack in a thread safe way.

README.md

@@ -70,7 +70,6 @@ int main(int argc, const char **argv) {
         curlcpp_traceback errors = error.get_traceback();
         // Otherwise we could print the stack like this:
         error.print_traceback();
-        // Note that the printing the stack will erase it
     }
     return 0;
 }
@@ -108,7 +107,6 @@ int main(int argc, const char **argv) {
         curlcpp_traceback errors = error.get_traceback();
         // Otherwise we could print the stack like this:
         error.print_traceback();
-        // Note that the printing the stack will erase it
     }
     
     // Retrieve information about curl current session.
@@ -162,7 +160,6 @@ int main(int argc, const char * argv[]) {
         curlcpp_traceback errors = error.get_traceback();
         // Otherwise we could print the stack like this:
         error.print_traceback();
-        // Note that the printing the stack will erase it
     }
     return 0;
 }
@@ -210,7 +207,6 @@ int main(int argc, const char * argv[]) {
         curlcpp_traceback errors = error.get_traceback();
         // Otherwise we could print the stack like this:
         error.print_traceback();
-        // Note that the printing the stack will erase it
     }
     myfile.close();
     return 0;
@@ -256,7 +252,6 @@ int main() {
         curlcpp_traceback errors = error.get_traceback();
         // Otherwise we could print the stack like this:
         error.print_traceback();
-        // Note that the printing the stack will erase it
     }
     // Let's print the stream content.
     cout<<str.str()<<endl;
@@ -305,7 +300,6 @@ int main(int argc, const char * argv[]) {
         curlcpp_traceback errors = error.get_traceback();
         // Otherwise we could print the stack like this:
         error.print_traceback();
-        // Note that the printing the stack will erase it
     }
 
     // Creation of a sender. You should wait here using select to check if socket is ready to send.

include/curl_exception.h

@@ -69,6 +69,10 @@ namespace curl {
          * Simple method which prints the entire error stack.
          */
         void print_traceback() const;
+        /**
+         * Simple method which clears the entire error stack.
+         */
+        void clear_traceback() const;
     private:
         /**
          * The error container must be static or will be cleared
@@ -88,6 +92,13 @@ namespace curl {
             std::cout<<"ERROR: "<<value.first<<" ::::: FUNCTION: "<<value.second<<std::endl;
         });
     }
+
+    // Implementation of clear method.
+    inline void curl_exception::clear_traceback() const {
+        curl_exception::tracebackLocker.lock();
+        curl_exception::traceback.clear();
+        curl_exception::tracebackLocker.unlock();
+    }
 
     // Implementation of get_traceback.
     inline curlcpp_traceback curl_exception::get_traceback() const {

src/curl_exception.cpp

@@ -8,17 +8,15 @@
 using curl::curl_exception;
 using curl::curlcpp_traceback;
 
-// Need to define the traceback here to separate declaration from definition, or we'll get a linker error.
+// Need to define the traceback here to separate declaration from definition, or we'll get a linker error...
 curlcpp_traceback curl::curl_exception::traceback;
-
+// .. same for the traceback mutexe.
 std::mutex curl::curl_exception::tracebackLocker;
 
 // Constructor implementation. Every call will push into the calls stack the function name and the error occurred.
 curl_exception::curl_exception(const std::string &error, const std::string &fun_name) {
     curl_exception::tracebackLocker.lock();
-
     curl_exception::traceback.insert(curl_exception::traceback.begin(),curlcpp_traceback_object(error,fun_name));
-
     curl_exception::tracebackLocker.unlock();
 }
 

test/easy.cpp

@@ -4,8 +4,7 @@ using curl::curl_easy;
 using curl::curl_easy_exception;
 
 /*
- * This example shows how to make a simple request with
- * curl.
+ * This example shows how to make a simple request with curl.
  */
 
 int main() {
@@ -22,7 +21,6 @@ int main() {
         auto errors = error.what();
         // Otherwise we could print the stack like this:
         error.print_traceback();
-        // Note that the printing the stack will erase it
     }
     return 0;
 }

test/easy_info.cpp

@@ -27,7 +27,6 @@ int main(int argc, const char **argv) {
         curlcpp_traceback errors = error.get_traceback();
         // Otherwise we could print the stack like this:
         error.print_traceback();
-        // Note that the printing the stack will erase it
     }
     // Retrieve information about curl current session.
     auto x = easy.get_info<char>(CURLINFO_CONTENT_TYPE);