Rewritten MountLibrary to work with non-blocking mount API calls in libcros....

chrome/browser/chromeos/cros/mount_library.h

Index: chrome/browser/chromeos/cros/mount_library.h
===================================================================
--- chrome/browser/chromeos/cros/mount_library.h	(revision 78562)
+++ chrome/browser/chromeos/cros/mount_library.h	(working copy)
@@ -7,7 +7,7 @@
 #pragma once
 
 #include <string>
-#include <vector>
+#include <map>
 
 #include "base/observer_list.h"
 #include "base/singleton.h"
@@ -16,52 +16,81 @@
 
 namespace chromeos {
 
+typedef enum MountLibraryEventType {
+  MOUNT_DISK_ADDED,
+  MOUNT_DISK_REMOVED,
+  MOUNT_DISK_CHANGED,
+  MOUNT_DISK_MOUNTED,
+  MOUNT_DISK_UNMOUNTED,
+  MOUNT_DEVICE_ADDED,
+  MOUNT_DEVICE_REMOVED,
+  MOUNT_DEVICE_SCANNED
+} MountLibraryEventType;
+
 // This class handles the interaction with the ChromeOS mount library APIs.
 // Classes can add themselves as observers. Users can get an instance of this
 // library class like this: chromeos::CrosLibrary::Get()->GetMountLibrary()
 class MountLibrary {
  public:
   // Used to house an instance of each found mount device.
-  struct Disk {
-    Disk() {}
-    Disk(const std::string& devicepath,
-         const std::string& mountpath,
-         const std::string& systempath,
-         bool isparent,
-         bool hasmedia)
-        : device_path(devicepath),
-          mount_path(mountpath),
-          system_path(systempath),
-          is_parent(isparent),
-          has_media(hasmedia) {}
+  class Disk {
+   public:
+    Disk(const std::string& device_path,
+         const std::string& mount_path,
+         const std::string& system_path,
+         bool is_parent,
+         bool has_media,
+         bool on_boot_device)
+        : device_path_(device_path),
+          mount_path_(mount_path),
+          system_path_(system_path),
+          is_parent_(is_parent),
+          has_media_(has_media),
+          on_boot_device_(on_boot_device) {}
     // The path of the device, used by devicekit-disks.
-    std::string device_path;
+    const std::string& device_path() const { return device_path_; }
     // The path to the mount point of this device. Will be empty if not mounted.
-    std::string mount_path;
+    const std::string&  mount_path() const { return mount_path_; }
     // The path of the device according to the udev system.
-    std::string system_path;
-    // if the device is a parent device (i.e. sdb rather than sdb1)
-    bool is_parent;
-    // if the device has media currently
-    bool has_media;
+    const std::string& system_path() const { return system_path_; }
+    // Is the device is a parent device (i.e. sdb rather than sdb1)
+    bool is_parent() const { return is_parent_; }
+    // Does the device contains media.
+    bool has_media() const { return has_media_; }
+    // Is the device ont
+    bool on_boot_device() const { return on_boot_device_; }
+
+    void set_mount_path(const char* mount_path) { mount_path_ = mount_path; }
+    void clear_mount_path() { mount_path_.clear(); }
+   private:
+    std::string device_path_;
+    std::string mount_path_;
+    std::string system_path_;
+    bool is_parent_;
+    bool has_media_;
+    bool on_boot_device_;
   };
-  typedef std::vector<Disk> DiskVector;
+  typedef std::map<std::string, Disk*> DiskMap;
 
   class Observer {
    public:
     virtual ~Observer() {}
-    virtual void MountChanged(MountLibrary* obj,
-                              MountEventType evt,
-                              const std::string& path) = 0;
+    // Async API events.
+    virtual void DiskChanged(MountLibraryEventType event,
+                             const Disk* disk) = 0;
+    virtual void DeviceChanged(MountLibraryEventType event,
+                               const std::string& device_path ) = 0;
   };
 
   virtual ~MountLibrary() {}
   virtual void AddObserver(Observer* observer) = 0;
   virtual void RemoveObserver(Observer* observer) = 0;
-  virtual const DiskVector& disks() const = 0;
-  virtual bool MountPath(const char* device_path) = 0;
-  virtual bool IsBootPath(const char* device_path) = 0;
+  virtual const DiskMap& disks() const = 0;
 
+  virtual void RequestMountInfoRefresh() = 0;
+  virtual void MountPath(const char* device_path) = 0;
+  virtual void UnmountPath(const char* device_path) = 0;
+
   // Factory function, creates a new instance and returns ownership.
   // For normal usage, access the singleton via CrosLibrary::Get().
   static MountLibrary* GetImpl(bool stub);