sem.h Problem

I am trying to program with semaphores and was told that I should use sem.h. When I compile, I get the error: "sys/sem.h: No such file or directory". How can I fix my problem?

Code:

#include <stdio.h>
#include <sys/sem.h>


int main() {
    printf("I am alive \n");
    getchar();
    return 0;
}

 

Removing that line would get rid of the error, but I still would like to use semaphores.

 

How would I get that file onto my computer?

I found sem.h, downloaded it, and placed it in the directory (C:\Program Files (x86)\CodeBlocks\MinGW\include). When I ran my program, the compiler said there were lots of problems with sem.h. After doing some research, I found out that I can't just add sem.h as this is just a 'pointer' file which is suppose to point to the actual code behind this function. I am trying to find how to get the actual code on my computer.

Sorry, I am very new to programming in C.

 

Semaphores are done differently on Windows than on Unix/Linux. sem.h and the related libraries are Unix. If you're programming Windows then you'll need to know about MSDN. Here's a demo program for semaphores on MSDN:

http://msdn.microsoft.com/en-us/library/ms686946(VS.85).aspx