Intel® oneAPI Threading Building Blocks Developer Guide and API Reference
tick_count class
[timing.tick_count]
A tick_count is an absolute wall clock timestamp. Two tick_count objects can be subtracted to compute wall clock duration tick_count::interval_t, which can be converted to seconds.
namespace oneapi {
namespace tbb {
class tick_count {
public:
class interval_t;
tick_count();
tick_count( const tick_count& );
~tick_count();
tick_count& operator=( const tick_count& );
static tick_count now();
static double resolution();
};
} // namespace tbb
} // namespace oneapi- tick_count()
-
Constructs tick_count with an unspecified wall clock timestamp.
- tick_count( const tick_count& )
-
Constructs tick_count with the timestamp of the given tick_count.
- ~tick_count()
-
Destructor.
- tick_count& operator=( const tick_count& )
-
Assigns the timestamp of one tick_count to another.
- static tick_count now()
-
Returns a tick_count object that represents the current wall clock timestamp.
- static double resolution()
-
Returns the resolution of the clock used by tick_count, in seconds.
[timing.tick_count.interval_t]
A tick_count::interval_t represents wall clock duration.
namespace oneapi {
namespace tbb {
class tick_count::interval_t {
public:
interval_t();
explicit interval_t( double );
~interval_t();
interval_t& operator=( const interval_t& );
interval_t& operator+=( const interval_t& );
interval_t& operator-=( const interval_t& );
double seconds() const;
};
} // namespace tbb
} // namespace oneapi- interval_t()
-
Constructs interval_t representing zero time duration.
- explicit interval_t( double )
-
Constructs interval_t representing the specified number of seconds.
- ~interval_t()
-
Destructor.
- interval_t& operator=( const interval_t& )
-
Assigns the wall clock duration of one interval_t to another.
- interval_t& operator+=( const interval_t& )
-
Increases the duration to the given interval_t, and returns *this.
- interval_t& operator-=( const interval_t& )
-
Decreases the duration to the given interval_t, and returns *this.
- double seconds() const
-
Returns the duration measured in seconds.
[timing.tick_count.nonmember]
These functions provide arithmetic binary operations with wall clock timestamps and durations.
oneapi::tbb::tick_count::interval_t operator-( const oneapi::tbb::tick_count&, const oneapi::tbb::tick_count& );
oneapi::tbb::tick_count::interval_t operator+( const oneapi::tbb::tick_count::interval_t&, const oneapi::tbb::tick_count::interval_t& );
oneapi::tbb::tick_count::interval_t operator-( const oneapi::tbb::tick_count::interval_t&, const oneapi::tbb::tick_count::interval_t& );The namespace where these functions are defined is unspecified as long as they may be used in respective binary operation expressions on tick_count and tick_count::interval_t objects. For example, an implementation may define the classes and functions in the same unspecified internal namespace, and define oneapi::tbb::tick_count as a type alias for which the non-member functions are reachable only via argument-dependent lookup.
- oneapi::tbb::tick_count::interval_t operator-( const oneapi::tbb::tick_count&, const oneapi::tbb::tick_count& )
-
Returns interval_t representing the duration between two given wall clock timestamps.
- oneapi::tbb::tick_count::interval_t operator+( const oneapi::tbb::tick_count::interval_t&, const oneapi::tbb::tick_count::interval_t& )
-
Returns interval_t representing the sum of two given intervals.
- oneapi::tbb::tick_count::interval_t operator-( const oneapi::tbb::tick_count::interval_t&, const oneapi::tbb::tick_count::interval_t& )
-
Returns interval_t representing the difference of two given intervals.