/// Returns the timestamp expressed in time_t.
/// time_t base time is midnight, January 1, 1970.
/// Resolution is one second.
UtcTimeva l utcTime() const;
/// Returns the timestamp expressed in UTC-based
/// time. UTC base time is midnight, October 15, 1582.
/// Resolution is 100 nanoseconds.
Timeva l epochMicroseconds() const;
/// Returns the timestamp expressed in microseconds
/// since the Unix epoch, midnight, January 1, 1970.
TimeDiff elapsed() const;
/// Returns the time elapsed since the time denoted by
/// the timestamp. Equivalent to Timestamp() - *this.
bool isElapsed(TimeDiff interval) const;
/// Returns true iff the given interval has passed
/// since the time denoted by the timestamp.
static Timestamp fromEpochTime(std::time_t t);
/// Creates a timestamp from a std::time_t.
static Timestamp fromUtcTime(UtcTimeva l val);
/// Creates a timestamp from a UTC time value.
static Timeva l resolution();
/// Returns the resolution in units per second.
/// Since the timestamp has microsecond resolution,
/// the returned value is always 1000000.
private:
Timeva l _ts;
};
class Foundation_API Timestamp
{
public:
typedef Int64 Timeva l; /// monotonic UTC time value in microsecond resolution
typedef Int64 UtcTimeva l; /// monotonic UTC time value in 100 nanosecond resolution
typedef Int64 TimeDiff; /// difference between two timestamps in microseconds
Timestamp();
/// Creates a timestamp with the current time.
Timestamp(Timeva l tv);
/// Creates a timestamp from the given time value.
Timestamp(const Timestamp& other);
/// Copy constructor.
~Timestamp();
Timestamp& operator = (const Timestamp& other);
Timestamp& operator = (Timeva l tv);
void swap(Timestamp& timestamp);
/// Swaps the Timestamp with another one.
void update();
/// Updates the Timestamp with the current time.
bool operator == (const Timestamp& ts) const;
bool operator != (const Timestamp& ts) const;
bool operator > (const Timestamp& ts) const;
bool operator >= (const Timestamp& ts) const;
bool operator < (const Timestamp& ts) const;
bool operator <= (const Timestamp& ts) const;
Timestamp operator + (TimeDiff d) const;
Timestamp operator - (TimeDiff d) const;
TimeDiff operator - (const Timestamp& ts) const;
Timestamp& operator += (TimeDiff d);
Timestamp& operator -= (TimeDiff d);
std::time_t epochTime() const;
/// Returns the timestamp expressed in time_t.
/// time_t base time is midnight, January 1, 1970.
/// Resolution is one second.
UtcTimeva l utcTime() const;
/// Returns the timestamp expressed in UTC-based
/// time. UTC base time is midnight, October 15, 1582.
/// Resolution is 100 nanoseconds.
Timeva l epochMicroseconds() const;
/// Returns the timestamp expressed in microseconds
/// since the Unix epoch, midnight, January 1, 1970.
TimeDiff elapsed() const;
/// Returns the time elapsed since the time denoted by
/// the timestamp. Equivalent to Timestamp() - *this.
bool isElapsed(TimeDiff interval) const;
/// Returns true iff the given interval has passed
/// since the time denoted by the timestamp.
static Timestamp fromEpochTime(std::time_t t);
/// Creates a timestamp from a std::time_t.
static Timestamp fromUtcTime