mgb_phys said:It depends on your operating system.
On windows QueryPerformanceCounter() will tell you the number of ticks since the last call, PerformanceCounterFrequency() tells you the frequency of the ticks ( it's about 10Mhz IIRC). Also take a look at 'multimedia timers'.
mgb_phys said:gettimeofday() contains microseconds since start of day,
I don't know what frequency it is updated at.
But if you google for QueryPerformanceCounter() alternatives under linux you should find something.
To calculate the time difference in milliseconds, you will need to use the clock() function from the time.h library. This function returns the number of clock ticks since the program started. You can convert this number to milliseconds by dividing it by the value of CLOCKS_PER_SEC, which represents the number of clock ticks per second. This will give you the time difference in milliseconds.
Yes, you can calculate the time difference in milliseconds between two specific times by using the difftime() function from the time.h library. This function takes two time values as parameters and returns the difference between them in seconds. You can then convert this value to milliseconds using the method mentioned in the previous answer.
The accuracy of the time difference calculation in milliseconds using time.h depends on the underlying hardware and operating system. Generally, it is accurate up to the millisecond level, but this may vary. It is best to consult the documentation for your specific hardware and operating system to determine the accuracy.
Yes, you can calculate the time difference in milliseconds for a specific process or function in your program by using the clock() function at the start and end of the process or function. You can then calculate the difference between these two values to get the time difference in milliseconds.
The maximum time difference that can be calculated in milliseconds using time.h is dependent on the data type used to store the time value. For example, if you are using the clock_t data type, the maximum value that can be stored is different for different systems. It is best to consult the documentation for your specific data type to determine the maximum time difference that can be calculated.