| // Copyright 2015 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_PROCESS_PORT_PROVIDER_MAC_H_ |
| #define BASE_PROCESS_PORT_PROVIDER_MAC_H_ |
| |
| #include <mach/mach.h> |
| |
| #include "base/base_export.h" |
| #include "base/memory/scoped_refptr.h" |
| #include "base/observer_list_threadsafe.h" |
| #include "base/process/process_handle.h" |
| |
| namespace base { |
| |
| // Abstract base class that provides a mapping from ProcessHandle (pid_t) to the |
| // Mach task port. This replicates task_for_pid(), which requires root |
| // privileges. |
| class BASE_EXPORT PortProvider { |
| public: |
| PortProvider(); |
| |
| PortProvider(const PortProvider&) = delete; |
| PortProvider& operator=(const PortProvider&) = delete; |
| |
| virtual ~PortProvider(); |
| |
| class Observer { |
| public: |
| virtual ~Observer() {} |
| // Called by the PortProvider to notify observers that the task port was |
| // received for a given process. |
| // This notification is guaranteed to be sent on the same task runner where |
| // the observer was added. |
| virtual void OnReceivedTaskPort(ProcessHandle process_handle) = 0; |
| }; |
| |
| // Returns the mach task port for `process_handle` if possible, or else |
| // `MACH_PORT_NULL`. |
| virtual mach_port_t TaskForHandle(ProcessHandle process_handle) const = 0; |
| |
| // Observer interface. |
| void AddObserver(Observer* observer); |
| void RemoveObserver(Observer* observer); |
| |
| protected: |
| // Called by subclasses to send a notification to observers. |
| void NotifyObservers(ProcessHandle process_handle); |
| |
| private: |
| scoped_refptr<base::ObserverListThreadSafe<Observer>> observer_list_; |
| }; |
| |
| // Port provider that returns the calling process's task port, ignoring its |
| // argument. |
| class BASE_EXPORT SelfPortProvider : public base::PortProvider { |
| mach_port_t TaskForHandle(base::ProcessHandle process_handle) const override; |
| }; |
| |
| } // namespace base |
| |
| #endif // BASE_PROCESS_PORT_PROVIDER_MAC_H_ |