MCLOCK (The GNU Fortran Compiler)

### 8.199 `MCLOCK` — Time function ¶

Synopsis:

  `RESULT = MCLOCK()`

Description:

  Returns the number of clock ticks since the start of the process, based on the function `clock(3)` in the C standard library.

  This intrinsic is not fully portable, such as to systems with 32-bit `INTEGER` types but supporting times wider than 32 bits. Therefore, the values returned by this intrinsic might be, or become, negative, or numerically less than previous values, during a single run of the compiled program.

Class:

  Function

Return value:

  The return value is a scalar of type `INTEGER(4)`, equal to the number of clock ticks since the start of the process, or `-1` if the system does not support `clock(3)`.

Standard:

  GNU extension

See also:

  `CTIME` — Convert a time into a string,
  `GMTIME` — Convert time to GMT info,
  `LTIME` — Convert time to local time info,
  `MCLOCK` — Time function,
  `TIME` — Time function