pthread_mutexattr_setpshared.c\thread\src - musl - musl - an implementation of the standard library for Linux-based systems

#include "pthread_impl.h"
int pthread_mutexattr_setpshared(pthread_mutexattr_t *a, int pshared)
{
	if (pshared > 1U) return EINVAL;
	a->__attr &= ~128U;
	a->__attr |= pshared<<7;
	return 0;
}