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g_unix_set_fd_nonblocking: New API to control file descriptor blocking state

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And use it in relevant places in GLib.

https://bugzilla.gnome.org/show_bug.cgi?id=649225
This commit is contained in:
Colin Walters
2011-05-03 09:52:10 -04:00
parent e08e70e08d
commit ed37970a04
6 changed files with 69 additions and 32 deletions
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50
glib/glib-unix.c
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@ -135,6 +135,56 @@ g_unix_pipe_flags (int *fds,
return TRUE;
}
/**
* g_unix_set_fd_nonblocking:
* @fd: A file descriptor
* @nonblock: If %TRUE, set the descriptor to be non-blocking
* @error: a #GError
*
* Control the non-blocking state of the given file descriptor,
* according to @nonblock. On most systems this uses %O_NONBLOCK, but
* on some older ones may use %O_NDELAY.
*
* Returns: %TRUE if successful
*/
gboolean
g_unix_set_fd_nonblocking (gint fd,
gboolean nonblock,
GError **error)
{
#ifdef F_GETFL
glong fcntl_flags;
fcntl_flags = fcntl (fd, F_GETFL);
if (fcntl_flags == -1)
return g_unix_set_error_from_errno (error);
if (nonblock)
{
#ifdef O_NONBLOCK
fcntl_flags |= O_NONBLOCK;
#else
fcntl_flags |= O_NDELAY;
#endif
}
else
{
#ifdef O_NONBLOCK
fcntl_flags &= ~O_NONBLOCK;
#else
fcntl_flags &= ~O_NDELAY;
#endif
}
if (fcntl (fd, F_SETFL, fcntl_flags) == -1)
return g_unix_set_error_from_errno (error);
return TRUE;
#else
return g_unix_set_error_from_errno_saved (error, EINVAL);
#endif
}
/**
* g_unix_signal_source_new:
* @signum: A signal number