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#ifndef CPU_H
#define CPU_H
#include <string>
/** @brief class representing a generic CPU */
class CPU {
public:
/** @brief constructor
*
* @param id the CPU is starting from 0
*/
CPU(int id);
/** @brief set a CPU online
*
* CPU 0 can't be offlined
*
* @param cpu number of CPU starting from 1
*
* @retval < 0 error setting CPU online
* @retval 0 CPU CPU already online
* @retval > 0 successfully onlined CPU
*/
int enable();
/** @brief set a CPU offline
*
* CPU 0 can't be offlined
*
* @param cpu number of CPU starting from 1
*
* @retval < 0 error setting CPU offline
* @retval 0 CPU CPU already offline
* @retval > 0 successfully offlined CPU
*/
int disable();
/** @brief if the CPU is online
*
* @return true if CPU is online, false otherwise
*/
bool online();
/** @brief enables all CPUs in system
*
* @return number of hotpluggable CPUs
*/
static int enableAll();
/** @brief if the CPU can be offlined and onlined
*
* @return true if hotpluggable, false otherwise
*/
bool hotpluggable();
/** @brief read a line from a file
*
* @param filename the filename to read from
* @param line char pointer to store the read line
* @param len chars to read
*
* @return false on error
*/
bool read_line(const char *filename, char *line, unsigned len);
/** @brief write a line to a file
*
* @param filename the filename to read from
* @param fmt format to write
* @param ... variable argument list to write
*
* @return false on error
*/
bool write_line(const char *filename, const char *fmt, ...);
protected:
/** @brief Stores which CPU this object corresponds to */
int _cpu_base;
private:
/** @brief filename for CPU hotplugging */
std::string ONLINE_FILE;
};
#endif // CPU_HOTPLUG_H
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