Do "Sleep()" exists in C Language?

This is a discussion on Do "Sleep()" exists in C Language? within the C Programming forums, part of the General Programming Boards category; Hi, Perhaps I am asking a silly question, but I really don't know about it. Can anyone tell me the ...

  1. #1
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    Do "Sleep()" exists in C Language?

    Hi,
    Perhaps I am asking a silly question, but I really don't know about it. Can anyone tell me the function for "sleep" kind of functionality in C language for Unix. I don't think any function with the name of sleep() exits in Unix's C language. or perhaps I am not known with the header file required for this. Can anyone guide me about the correct function to halt the program execution for a specified time? Do tell me the header file required for the function as well.

    Regards,

  2. #2
    Guest Sebastiani's Avatar
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    I don't think there is (correct me if I'm wrong). The usual hack is:


    Code:
    #include <time.h>
    
    void wait(unsigned timeout)
    {
     timeout += clock(); 
     while(clock() < timeout)
      continue;
    }
    Code:
    bool fun(bool value)
    {
        return std::pow(std::exp(1), std::complex<float>(0, 1) 
        * std::complex<float>(std::atan(1)*(1 << (value + 2))))
        .real() > 0;
    }

  3. #3
    ....
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    There is no sleep function in standard C, but your OS may provide such a function. What OS are you using? In case of a Unix-like OS there is function sleep(), it's part of the POSIX standard, you need to include unistd.h for that.

    http://www.opengroup.org/onlinepubs/.../unistd.h.html

  4. #4
    End Of Line Hammer's Avatar
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    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

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