Example
#include <stdio.h>
#include <threads.h>
#include <stdlib.h>
struct my_thread_data {
double factor;
};
int my_thread_func(void* a) {
struct my_thread_data* d = a;
// do something with d
printf("we found %g\n", d->factor);
// return an success or error code
return d->factor > 1.0;
}
int main(int argc, char* argv[argc+1]) {
unsigned n = 4;
if (argc > 1) n = strtoull(argv[1], 0, 0);
// reserve space for the arguments for the threads
struct my_thread_data D[n]; // can't be initialized
for (unsigned i = 0; i < n; ++i) {
D[i] = (struct my_thread_data){ .factor = 0.5*i, };
}
// reserve space for the ID's of the threads
thrd_t id[4];
// launch the threads
for (unsigned i = 0; i < n; ++i) {
thrd_create(&id[i], my_thread_func, &D[i]);
}
// Wait that all threads have finished, but throw away their
// return values
for (unsigned i = 0; i < n; ++i) {
thrd_join(id[i], 0);
}
return EXIT_SUCCESS;
}
