4 files changed, 36 insertions, 31 deletions
diff --git a/src/Common/Backends/SystemBackendPosix.cpp b/src/Common/Backends/SystemBackendPosix.cpp
index b1e088d..3ddf67d 100644
--- a/src/Common/Backends/SystemBackendPosix.cpp
+++ b/src/Common/Backends/SystemBackendPosix.cpp
@@ -69,7 +69,7 @@ void SystemBackendPosix::childHandler(int) {
   setChildHandler();
 }
 
-bool SystemBackendPosix::exec(sigc::slot<void, int> resultHandler, const std::string &filename, const std::vector<std::string> &argv, const std::vector<std::string> &env) {
+bool SystemBackendPosix::exec(const sigc::slot<void, int>& resultHandler, const std::string &filename, const std::vector<std::string> &argv, const std::vector<std::string> &env) {
   pid_t pid;
   char **argvp, **envp;
 
diff --git a/src/Common/Backends/SystemBackendPosix.h b/src/Common/Backends/SystemBackendPosix.h
index 9efd59f..4a2c572 100644
--- a/src/Common/Backends/SystemBackendPosix.h
+++ b/src/Common/Backends/SystemBackendPosix.h
@@ -28,6 +28,7 @@
 
 #include <sys/types.h>
 #include <sigc++/signal.h>
+#include <sigc++/hide.h>
 
 namespace Mad {
 namespace Common {
@@ -47,8 +48,8 @@ class SystemBackendPosix : public SystemBackend {
     }
 
   protected:
-    virtual bool doShutdown() {return exec(sigc::slot<void, int>(), "/sbin/halt");}
-    virtual bool doReboot() {return exec(sigc::slot<void, int>(), "/sbin/reboot");}
+    virtual bool doShutdown(const sigc::slot<void> &callback) {return exec(sigc::hide(callback), "/sbin/halt");}
+    virtual bool doReboot(const sigc::slot<void> &callback) {return exec(sigc::hide(callback), "/sbin/reboot");}
 
   public:
     ~SystemBackendPosix();
@@ -61,7 +62,7 @@ class SystemBackendPosix : public SystemBackend {
       SystemBackend::unregisterBackend(&backend);
     }
 
-    static bool exec(sigc::slot<void, int> resultHandler, const std::string &filename, const std::vector<std::string> &argv = std::vector<std::string>(),
+    static bool exec(const sigc::slot<void, int> &resultHandler, const std::string &filename, const std::vector<std::string> &argv = std::vector<std::string>(),
         const std::vector<std::string> &env = std::vector<std::string>());
 };
 
diff --git a/src/Common/Backends/SystemBackendProc.cpp b/src/Common/Backends/SystemBackendProc.cpp
index 37bfaf3..134998f 100644
--- a/src/Common/Backends/SystemBackendProc.cpp
+++ b/src/Common/Backends/SystemBackendProc.cpp
@@ -28,37 +28,37 @@ namespace Backends {
 
 SystemBackendProc SystemBackendProc::backend;
 
-SystemBackend::UptimeInfo SystemBackendProc::uptimeInfo() {
-  UptimeInfo uptime = {0, 0};
+bool SystemBackendProc::uptimeInfo(const sigc::slot<void, unsigned long, unsigned long> &callback) {
+  unsigned long uptime = 0, idleTime = 0;
 
   uptimeFile.seekg(0, std::ios::beg);
 
   if(!uptimeFile.good())
-    return uptime;
+    return false;
 
   float f;
   uptimeFile >> f;
   if(!uptimeFile.good())
-    return uptime;
+    return false;
 
-  uptime.uptime = (unsigned long)f;
+  uptime = (unsigned long)f;
 
   uptimeFile >> f;
-  if(!uptimeFile.good())
-    return uptime;
+  if(uptimeFile.good())
+    idleTime = (unsigned long)f;
 
-  uptime.idleTime = (unsigned long)f;
+  callback(uptime, idleTime);
 
-  return uptime;
+  return true;
 }
 
-SystemBackend::MemoryInfo SystemBackendProc::memoryInfo() {
-  MemoryInfo memInfo = {0, 0, 0, 0};
+bool SystemBackendProc::memoryInfo(const sigc::slot<void, unsigned long, unsigned long, unsigned long, unsigned long> &callback) {
+  unsigned long totalMem = 0, freeMem = 0, totalSwap = 0, freeSwap = 0;
 
   meminfoFile.seekg(0, std::ios::beg);
 
   if(!meminfoFile.good())
-    return memInfo;
+    return false;
 
   while(!meminfoFile.eof() && meminfoFile.good()) {
     std::string line;
@@ -69,42 +69,46 @@ SystemBackend::MemoryInfo SystemBackendProc::memoryInfo() {
 
     if(std::sscanf(line.c_str(), "%s %lu", name, &value) == 2) {
       if(std::strcmp(name, "MemTotal:") == 0)
-        memInfo.totalMem = value;
+        totalMem = value;
       else if(std::strcmp(name, "MemFree:") == 0)
-        memInfo.freeMem = value;
+        freeMem = value;
       else if(std::strcmp(name, "SwapTotal:") == 0)
-        memInfo.totalSwap = value;
+        totalSwap = value;
       else if(std::strcmp(name, "SwapFree:") == 0)
-        memInfo.freeSwap = value;
+        freeSwap = value;
     }
 
     delete [] name;
 
-    if(memInfo.totalMem && memInfo.freeMem && memInfo.totalSwap && memInfo.freeSwap)
+    if(totalMem && freeMem && totalSwap && freeSwap)
       break;
   }
 
+  callback(totalMem, freeMem, totalSwap, freeSwap);
 
-  return memInfo;
+  return true;
 }
 
-SystemBackend::LoadInfo SystemBackendProc::loadInfo() {
-  LoadInfo loadInfo = {0, 0, 0, 0, 0};
+bool SystemBackendProc::loadInfo(const sigc::slot<void, unsigned long, unsigned long, float, float, float> &callback) {
+  unsigned long currentLoad = 0, nProcesses = 0;
+  float loadAvg1 = 0, loadAvg5 = 0, loadAvg15 = 0;
 
   loadFile.seekg(0, std::ios::beg);
 
   if(!loadFile.good())
-    return loadInfo;
+    return false;
 
   std::string line;
   std::getline(loadFile, line);
 
   if(line.empty())
-    return loadInfo;
+    return false;
+
+  std::sscanf(line.c_str(), "%f %f %f %lu/%lu", &loadAvg1, &loadAvg5, &loadAvg15, &currentLoad, &nProcesses);
 
-  std::sscanf(line.c_str(), "%f %f %f %lu/%lu", &loadInfo.loadAvg1, &loadInfo.loadAvg5, &loadInfo.loadAvg15, &loadInfo.currentLoad, &loadInfo.nProcesses);
+  callback(currentLoad, nProcesses, loadAvg1, loadAvg5, loadAvg15);
 
-  return loadInfo;
+  return true;
 }
 
 }
diff --git a/src/Common/Backends/SystemBackendProc.h b/src/Common/Backends/SystemBackendProc.h
index 619c996..79ff6c5 100644
--- a/src/Common/Backends/SystemBackendProc.h
+++ b/src/Common/Backends/SystemBackendProc.h
@@ -47,9 +47,9 @@ class SystemBackendProc : public SystemBackend {
       SystemBackend::unregisterBackend(&backend);
     }
 
-    virtual UptimeInfo uptimeInfo();
-    virtual MemoryInfo memoryInfo();
-    virtual LoadInfo loadInfo();
+    virtual bool uptimeInfo(const sigc::slot<void, unsigned long, unsigned long> &callback);
+    virtual bool memoryInfo(const sigc::slot<void, unsigned long, unsigned long, unsigned long, unsigned long> &callback);
+    virtual bool loadInfo(const sigc::slot<void, unsigned long, unsigned long, float, float, float> &callback);
 };
 
 }