posix.h

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#ifndef RBIMPL_INTERN_SELECT_POSIX_H                 /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_INTERN_SELECT_POSIX_H
#include "ruby/internal/config.h"
 
#ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>        /* for select(2) (modern POSIX) */
#endif
 
#ifdef HAVE_UNISTD_H
# include <unistd.h>            /* for select(2) (archaic UNIX) */
#endif
 
#include "ruby/internal/attr/const.h"
#include "ruby/internal/attr/noalias.h"
#include "ruby/internal/attr/nonnull.h"
#include "ruby/internal/attr/pure.h"
 
typedef fd_set rb_fdset_t;
 
#define rb_fd_zero   FD_ZERO
 
#define rb_fd_set    FD_SET
 
#define rb_fd_clr    FD_CLR
 
#define rb_fd_isset  FD_ISSET
 
#define rb_fd_init   FD_ZERO
 
#define rb_fd_select select
 
#define rb_fd_copy  rb_fd_copy
#define rb_fd_dup   rb_fd_dup
#define rb_fd_ptr   rb_fd_ptr
#define rb_fd_max   rb_fd_max
RBIMPL_ATTR_NONNULL(())
RBIMPL_ATTR_NOALIAS()
static inline void
rb_fd_copy(rb_fdset_t *dst, const fd_set *src, int n)
{
    *dst = *src;
}
 
RBIMPL_ATTR_NONNULL(())
RBIMPL_ATTR_NOALIAS()
static inline void
rb_fd_dup(rb_fdset_t *dst, const fd_set *src)
{
    *dst = *src;
}
 
RBIMPL_ATTR_PURE()
/* :TODO: can this function be __attribute__((returns_nonnull)) or not? */
static inline fd_set *
rb_fd_ptr(rb_fdset_t *f)
{
    return f;
}
 
RBIMPL_ATTR_CONST()
static inline int
rb_fd_max(const rb_fdset_t *f)
{
    return FD_SETSIZE;
}
 
/* :FIXME: What are these?  They don't exist for sibling implementations. */
#define rb_fd_init_copy(d, s) (*(d) = *(s))
#define rb_fd_term(f)   ((void)(f))
#endif /* RBIMPL_INTERN_SELECT_POSIX_H */