Sleep function in C

Question

Is there a function like Sleep time   that pauses the program for X milliseconds  but in C     Which header should I add and what is the function s signature

User · Answer

For Windows    include  windows h   Sleep 10     For Unix    include  lt unistd h gt  usleep 10

User · Answer

Prior to C  11  there was no portable way to do this   A portable way is to use Boost or Ace library  There is ACE OS  sleep    in ACE

User · Answer

You ll need at least C  11    include  lt thread gt   include  lt chrono gt        std  this thread  sleep for std  chrono  milliseconds 200

User · Answer

Recently I was learning about chrono library and thought of implementing a sleep function on my own  Here is the code   include  lt cmath gt   include  lt chrono gt   template  lt typename rep   std  chrono  seconds  rep             typename period   std  chrono  seconds  period gt  void sleep std  chrono  duration lt rep  period gt  sec        using sleep duration   std  chrono  duration lt long double  std  nano gt        std  chrono  steady clock  time point start   std  chrono  steady clock  now        std  chrono  steady clock  time point end   std  chrono  steady clock  now         long double elapsed time        std  chrono  duration cast lt sleep duration gt  end - start  count         long double sleep time        std  chrono  duration cast lt sleep duration gt  sec  count         while  std  isgreater sleep time  elapsed time             end   std  chrono  steady clock  now            elapsed time   std  chrono  duration cast lt sleep duration gt  end - start  count              We can use it with any std  chrono  duration type  By default it takes std  chrono  seconds as argument   For example   include  lt cmath gt   include  lt chrono gt   template  lt typename rep   std  chrono  seconds  rep             typename period   std  chrono  seconds  period gt  void sleep std  chrono  duration lt rep  period gt  sec        using sleep duration   std  chrono  duration lt long double  std  nano gt        std  chrono  steady clock  time point start   std  chrono  steady clock  now        std  chrono  steady clock  time point end   std  chrono  steady clock  now         long double elapsed time        std  chrono  duration cast lt sleep duration gt  end - start  count         long double sleep time        std  chrono  duration cast lt sleep duration gt  sec  count         while  std  isgreater sleep time  elapsed time             end   std  chrono  steady clock  now            elapsed time   std  chrono  duration cast lt sleep duration gt  end - start  count              using namespace std  chrono literals  int main  void        std  chrono  steady clock  time point start1   std  chrono  steady clock  now             sleep 5s       sleep for 5 seconds          std  chrono  steady clock  time point end1   std  chrono  steady clock  now             std  cout  lt  lt  std  setprecision 9   lt  lt  std  fixed      std  cout  lt  lt   quot Elapsed time was   quot   lt  lt  std  chrono  duration cast lt std  chrono  seconds gt  end1-start1  count    lt  lt   quot s n quot            std  chrono  steady clock  time point start2   std  chrono  steady clock  now         sleep 500000ns       sleep for 500000 nano seconds 500 micro seconds        same as writing  sleep 500us           std  chrono  steady clock  time point end2   std  chrono  steady clock  now             std  cout  lt  lt   quot Elapsed time was   quot   lt  lt  std  chrono  duration cast lt std  chrono  microseconds gt  end2-start2  count    lt  lt   quot us n quot       return 0     For more information  visit https   en cppreference com w cpp header chrono and see this cppcon talk of Howard Hinnant  https   www youtube com watch v P32hvk8b13M  He has two more talks on chrono library  And you can always use the library function  std  this thread  sleep for Note  Outputs may not be accurate  So  don t expect it to give exact timings

User · Answer

Just use it     Firstly include the unistd h header file   include lt unistd h gt   and use this function for pausing your program execution for desired number of seconds   sleep x     x can take any value in seconds   If you want to pause the program for 5 seconds it is like this   sleep 5     It is correct and I use it frequently   It is valid for C and C

User · Answer

On Unix  include  include  lt unistd h gt    The call you re interested in is usleep    Which takes microseconds  so you should multiply your millisecond value by 1000 and pass the result to usleep

User · Answer

The simplest way I found for C   11 was this    Your includes     include  lt chrono gt   include  lt thread gt    Your code  this is an example for sleep 1000 millisecond     std  chrono  duration lt int  std  milli gt  timespan 1000   std  this thread  sleep for timespan     The duration could be configured to any of the following   std  chrono  nanoseconds   duration lt   signed integer type of at least 64 bits    std  nano gt  std  chrono  microseconds  duration lt   signed integer type of at least 55 bits    std  micro gt  std  chrono  milliseconds  duration lt   signed integer type of at least 45 bits    std  milli gt  std  chrono  seconds       duration lt   signed integer type of at least 35 bits    std  ratio lt 1 gt  gt    std  chrono  minutes       duration lt   signed integer type of at least 29 bits    std  ratio lt 60 gt  gt  std  chrono  hours         duration lt   signed integer type of at least 23 bits    std  ratio lt 3600 gt  gt

User · Answer

Use std  this thread  sleep for   include  lt chrono gt   include  lt thread gt   std  chrono  milliseconds timespan 111605      or whatever  std  this thread  sleep for timespan    There is also the complementary std  this thread  sleep until   Prior to C  11  C   had no thread concept and no sleep capability  so your solution was necessarily platform dependent  Here s a snippet that defines a sleep function for Windows or Unix   ifdef  WIN32      include  lt windows h gt       void sleep unsigned milliseconds                Sleep milliseconds          else      include  lt unistd h gt           void sleep unsigned milliseconds                usleep milliseconds   1000      takes microseconds        endif  But a much simpler pre-C  11 method is to use boost  this thread  sleep

[c++] Sleep function in C++

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