#include <rudiments/file.h>
#include <rudiments/permissions.h>
#include <rudiments/semaphoreset.h>
#include <rudiments/error.h>
#include <rudiments/stdio.h>
int main(int argc, const char **argv) {
// create a file named "sem"
file::createFile("sem",permissions::evalPermString("rw-------"));
// generate a unique semaphore id based on the file
key_t semid=file::generateKey("sem",1);
// Create a semaphore set, containing 2 semaphores.
// Initialize them to 0 and 1 respectively.
int32_t vals[2]={0,1};
semaphoreset sem;
if (sem.create(semid,permissions::evalPermString("rw-------"),2,vals)) {
// loop 10 times, printing 2 and 4, using the
// semaphores to synchronize with another process
for (int i=0; i<10; i++) {
sem.wait(0);
stdoutput.printf("2\n");
sem.signal(1);
sem.wait(0);
stdoutput.printf("4\n");
sem.signal(1);
}
} else {
// an error must have occurred
char *err=error::getErrorString();
stdoutput.printf("error: %s\n",err);
delete[] err;
}
// remove the file "sem"
file::remove("sem");
}