This class accumulates system, user, and wall times of the current process.
Declared in <bsls_stopwatch.h>
class Stopwatch;A stopwatch can be in either the STOPPED (initial) state or the RUNNING state. It potentially tracks three values: the accumulated system time, the accumulated user time, and the accumulated wall time (all in seconds and all initially set to zero). Whether or not system and user times are accumulated is conditional on how the stopwatch is started (see the start method). While in the RUNNING state, a stopwatch accumulates the above values and it retains the values if put into the STOPPED state (unless reset is called). The accumulated times can be accessed at any time and in either state (RUNNING or STOPPED).
| Name | Description |
|---|---|
Stopwatch [constructor] | Constructors |
~Stopwatch [destructor] | Destroy this stopwatch. Note that this method's definition is compiler generated. |
accumulatedSystemTime | Return accumulated system CPU time in seconds. |
accumulatedTimes | Load the accumulated system, user, and wall times in seconds. |
accumulatedUserTime | Return accumulated user CPU time in seconds. |
accumulatedWallTime | Return accumulated wall time in seconds. |
elapsedTime | Return the accumulated elapsed wall time in seconds. |
isRunning | Return true if this stopwatch is in the RUNNING state, and false otherwise. |
reset | Place this stopwatch in the STOPPED state, unconditionally stopping the accumulation of elapsed times, and set the quiescent elapsed times to 0.0. |
start | Start this stopwatch if it is not already running. |
stop | Stop this stopwatch and cease accumulating elapsed times. |
| Name | Description |
|---|---|
k_COLLECT_WALL_AND_CPU_TIMES | For readability/ease of understanding of code that calls the start(bool) method use these constants as arguments. |
k_COLLECT_WALL_TIME_ONLY | Collect wall time only (not CPU time). |