github.com/afumu/libc@v0.0.6/musl/src/thread/pthread_mutexattr_setpshared.c (about)

     1  #include "pthread_impl.h"
     2  
     3  int pthread_mutexattr_setpshared(pthread_mutexattr_t *a, int pshared)
     4  {
     5  	if (pshared > 1U) return EINVAL;
     6  	a->__attr &= ~128U;
     7  	a->__attr |= pshared<<7;
     8  	return 0;
     9  }