diff options
Diffstat (limited to 'contrib/ntp/lib/isc/pthreads/include/isc/once.h')
-rw-r--r-- | contrib/ntp/lib/isc/pthreads/include/isc/once.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/contrib/ntp/lib/isc/pthreads/include/isc/once.h b/contrib/ntp/lib/isc/pthreads/include/isc/once.h new file mode 100644 index 000000000000..31d76fb6f2b7 --- /dev/null +++ b/contrib/ntp/lib/isc/pthreads/include/isc/once.h @@ -0,0 +1,50 @@ +/* + * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 1999-2001 Internet Software Consortium. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH + * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, + * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +/* $Id: once.h,v 1.13 2007/06/19 23:47:18 tbox Exp $ */ + +#ifndef ISC_ONCE_H +#define ISC_ONCE_H 1 + +/*! \file */ + +#include <pthread.h> + +#include <isc/platform.h> +#include <isc/result.h> + +typedef pthread_once_t isc_once_t; + +#ifdef ISC_PLATFORM_BRACEPTHREADONCEINIT +/*! + * This accomodates systems that define PTHRAD_ONCE_INIT improperly. + */ +#define ISC_ONCE_INIT { PTHREAD_ONCE_INIT } +#else +/*! + * This is the usual case. + */ +#define ISC_ONCE_INIT PTHREAD_ONCE_INIT +#endif + +/* XXX We could do fancier error handling... */ + +#define isc_once_do(op, f) \ + ((pthread_once((op), (f)) == 0) ? \ + ISC_R_SUCCESS : ISC_R_UNEXPECTED) + +#endif /* ISC_ONCE_H */ |