diff options
Diffstat (limited to 'newlib/libc/include/sys/select.h')
-rw-r--r-- | newlib/libc/include/sys/select.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/newlib/libc/include/sys/select.h b/newlib/libc/include/sys/select.h new file mode 100644 index 000000000..ffe890049 --- /dev/null +++ b/newlib/libc/include/sys/select.h @@ -0,0 +1,87 @@ +/* select.h + Copyright 1998, 1999, 2000, 2001, 2005, 2009 Red Hat, Inc. + + Written by Geoffrey Noer <noer@cygnus.com> + +This file is part of Cygwin. + +This software is a copyrighted work licensed under the terms of the +Cygwin license. Please consult the file "CYGWIN_LICENSE" for +details. */ + +#ifndef _SYS_SELECT_H +#define _SYS_SELECT_H + +/* We don't define fd_set and friends if we are compiling POSIX + source, or if we have included (or may include as indicated + by __USE_W32_SOCKETS) the W32api winsock[2].h header which + defines Windows versions of them. Note that a program which + includes the W32api winsock[2].h header must know what it is doing; + it must not call the Cygwin select function. +*/ +# if !(defined (_POSIX_SOURCE) || defined (_WINSOCK_H) || defined (_WINSOCKAPI_) || defined (__USE_W32_SOCKETS)) + +#include <sys/cdefs.h> + +/* Get fd_set, and macros like FD_SET */ +#include <sys/types.h> + +/* Get definition of timeval. */ +#include <sys/time.h> +#include <time.h> + +/* Get definition of sigset_t. */ +#include <signal.h> + +# define _SYS_TYPES_FD_SET +/* + * Select uses bit masks of file descriptors in longs. + * These macros manipulate such bit fields (the filesystem macros use chars). + * FD_SETSIZE may be defined by the user, but the default here + * should be >= NOFILE (param.h). + */ +# ifndef FD_SETSIZE +# define FD_SETSIZE 64 +# endif + +typedef unsigned long fd_mask; +# define NFDBITS (sizeof (fd_mask) * 8) /* bits per mask */ +# ifndef _howmany +# define _howmany(x,y) (((x)+((y)-1))/(y)) +# endif + +/* We use a macro for fd_set so that including Sockets.h afterwards + can work. */ +typedef struct _types_fd_set { + fd_mask fds_bits[_howmany(FD_SETSIZE, NFDBITS)]; +} _types_fd_set; + +#define fd_set _types_fd_set + +# define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1L << ((n) % NFDBITS))) +# define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1L << ((n) % NFDBITS))) +# define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1L << ((n) % NFDBITS))) +# define FD_ZERO(p) (__extension__ (void)({ \ + size_t __i; \ + char *__tmp = (char *)p; \ + for (__i = 0; __i < sizeof (*(p)); ++__i) \ + *__tmp++ = 0; \ +})) + +#if !defined (__INSIDE_CYGWIN_NET__) + +__BEGIN_DECLS + +int select __P ((int __n, fd_set *__readfds, fd_set *__writefds, + fd_set *__exceptfds, struct timeval *__timeout)); +int pselect __P ((int __n, fd_set *__readfds, fd_set *__writefds, + fd_set *__exceptfds, const struct timespec *__timeout, + const sigset_t *__set)); + +__END_DECLS + +#endif + +#endif /* !_POSIX_SOURCE, !__INSIDE_CYGWIN_NET__ */ + +#endif /* sys/select.h */ |