Made the Error object thread safe.

3 files changed, 21 insertions, 4 deletions

diff --git a/src/error.cc b/src/error.cc
index b166042..4e3f045 100644
--- a/src/error.cc
+++ b/src/error.cc
@@ -30,12 +30,21 @@ Error::Error()
 {
   // Initialize
   lastError = NULL;
+
+  pthread_mutex_init (&mutex, NULL);
 }
 
 Error::~Error()
 {
 }
 
+/*
+      pthread_mutex_lock(&mutex);
+      // ... do something
+      pthread_mutex_unlock(&mutex);
+
+ */
+
 bool Error::hasError()
 {
   return lastError != NULL;
@@ -52,17 +61,20 @@ string Error::popAllErrorStrings()
 
 string Error::popErrorString()
 {
+  pthread_mutex_lock(&mutex);
   if(lastError == NULL) return string("");
 
   _err_entry *err = lastError;
   string le = err->errstr;
   lastError = err->prev;
   delete err;
+  pthread_mutex_unlock(&mutex);
   return le;
 }
 
 void Error::pushError(char* errstr)
 {
+  pthread_mutex_lock(&mutex);
   printf("New Error: [%s]\n", errstr);
 
   _err_entry *err = new _err_entry;
@@ -70,19 +82,21 @@ void Error::pushError(char* errstr)
   err->errstr = errstr;
   err->prev = lastError;
   lastError = err;
+  pthread_mutex_unlock(&mutex);
 }
 
 void Error::pushError(string &errstr)
 {
+  pthread_mutex_lock(&mutex);
   _err_entry *err = new _err_entry;
 
   err->errstr = errstr;
   err->prev = lastError;
   lastError = err;
+  pthread_mutex_unlock(&mutex);
 }
 
 void Error::removeAllErrors()
 {
   while(lastError) popErrorString();
-  
 }
diff --git a/src/error.h b/src/error.h
index 8b26471..a7e6b29 100644
--- a/src/error.h
+++ b/src/error.h
@@ -30,6 +30,9 @@
 #include <string>
 using namespace std;
 
+#include <pthread.h>
+#include <semaphore.h>
+
 /**
  * This struct contains one error, and a pointer to the previous one.
  */
@@ -54,8 +57,9 @@ public:
   void removeAllErrors();
 
 private:
-  // Used to save the state of the network and camera connections.
-  bool error;
+  pthread_mutex_t mutex;
+
+  // A pointer to the last error.
   _err_entry *lastError;
 };
 
diff --git a/src/mainwindow.cc b/src/mainwindow.cc
index e779c19..8164981 100644
--- a/src/mainwindow.cc
+++ b/src/mainwindow.cc
@@ -95,7 +95,6 @@ MainWindow::MainWindow( QWidget* parent, const char* name )
                   cfg.readInt("server_port"));
 
   cam_error = camera->errorObject();
-  cam_error->pushError("fisk");
   while(cam_error->hasError()) {
     MessageBox(this, "", cam_error->popErrorString().c_str(), TYPE_OK, ICON_ERROR).exec();
   }