84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
#ifndef ANDROID_DVR_PERFORMANCED_TASK_H_
|
|
#define ANDROID_DVR_PERFORMANCED_TASK_H_
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <array>
|
|
#include <cstdio>
|
|
#include <memory>
|
|
#include <string>
|
|
#include <unordered_map>
|
|
#include <vector>
|
|
|
|
#include <android-base/unique_fd.h>
|
|
|
|
#include "unique_file.h"
|
|
|
|
namespace android {
|
|
namespace dvr {
|
|
|
|
// Task provides access to task-related information from the procfs
|
|
// pseudo-filesystem.
|
|
class Task {
|
|
public:
|
|
explicit Task(pid_t task_id);
|
|
|
|
bool IsValid() const { return task_fd_.get() >= 0; }
|
|
explicit operator bool() const { return IsValid(); }
|
|
|
|
pid_t task_id() const { return task_id_; }
|
|
std::string name() const { return name_; }
|
|
pid_t thread_group_id() const { return thread_group_id_; }
|
|
pid_t parent_process_id() const { return parent_process_id_; }
|
|
size_t thread_count() const { return thread_count_; }
|
|
uint32_t cpus_allowed_mask() const { return cpus_allowed_mask_; }
|
|
const std::string& cpus_allowed_list() const { return cpus_allowed_list_; }
|
|
const std::array<int, 4>& user_id() const { return user_id_; }
|
|
const std::array<int, 4>& group_id() const { return group_id_; }
|
|
|
|
// Indices into user and group id arrays.
|
|
enum {
|
|
kUidReal = 0,
|
|
kUidEffective,
|
|
kUidSavedSet,
|
|
kUidFilesystem,
|
|
};
|
|
|
|
std::string GetCpuSetPath() const;
|
|
|
|
private:
|
|
pid_t task_id_;
|
|
base::unique_fd task_fd_;
|
|
|
|
// Fields read from /proc/<task_id_>/status.
|
|
std::string name_;
|
|
pid_t thread_group_id_;
|
|
pid_t parent_process_id_;
|
|
std::array<int, 4> user_id_;
|
|
std::array<int, 4> group_id_;
|
|
size_t thread_count_;
|
|
uint32_t cpus_allowed_mask_;
|
|
std::string cpus_allowed_list_;
|
|
|
|
// Opens the file /proc/<task_id_>/|name| and returns the open file
|
|
// descriptor.
|
|
base::unique_fd OpenTaskFile(const std::string& name) const;
|
|
|
|
// Similar to OpenTaskFile() but returns a file pointer.
|
|
UniqueFile OpenTaskFilePointer(const std::string& name) const;
|
|
|
|
// Reads the field named |field| from /proc/<task_id_>/status.
|
|
std::string GetStatusField(const std::string& field) const;
|
|
|
|
// Reads a subset of the fields in /proc/<task_id_>/status.
|
|
void ReadStatusFields();
|
|
|
|
Task(const Task&) = delete;
|
|
void operator=(const Task&) = delete;
|
|
};
|
|
|
|
} // namespace dvr
|
|
} // namespace android
|
|
|
|
#endif // ANDROID_DVR_PERFORMANCED_TASK_H_
|