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Diffstat (limited to 'lib/isc/nothreads/include/isc/condition.h')
-rw-r--r-- | lib/isc/nothreads/include/isc/condition.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/lib/isc/nothreads/include/isc/condition.h b/lib/isc/nothreads/include/isc/condition.h new file mode 100644 index 000000000000..b269f82fc0ba --- /dev/null +++ b/lib/isc/nothreads/include/isc/condition.h @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2004, 2007 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 2000, 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: condition.h,v 1.6 2007/06/19 23:47:18 tbox Exp $ */ + +/* + * This provides a limited subset of the isc_condition_t + * functionality for use by single-threaded programs that + * need to block waiting for events. Only a single + * call to isc_condition_wait() may be blocked at any given + * time, and the _waituntil and _broadcast functions are not + * supported. This is intended primarily for use by the omapi + * library, and may go away once omapi goes away. Use for + * other purposes is strongly discouraged. + */ + +#ifndef ISC_CONDITION_H +#define ISC_CONDITION_H 1 + +#include <isc/mutex.h> + +typedef int isc_condition_t; + +isc_result_t isc__nothread_wait_hack(isc_condition_t *cp, isc_mutex_t *mp); +isc_result_t isc__nothread_signal_hack(isc_condition_t *cp); + +#define isc_condition_init(cp) \ + (*(cp) = 0, ISC_R_SUCCESS) + +#define isc_condition_wait(cp, mp) \ + isc__nothread_wait_hack(cp, mp) + +#define isc_condition_waituntil(cp, mp, tp) \ + ((void)(cp), (void)(mp), (void)(tp), ISC_R_NOTIMPLEMENTED) + +#define isc_condition_signal(cp) \ + isc__nothread_signal_hack(cp) + +#define isc_condition_broadcast(cp) \ + ((void)(cp), ISC_R_NOTIMPLEMENTED) + +#define isc_condition_destroy(cp) \ + (*(cp) == 0 ? (*(cp) = -1, ISC_R_SUCCESS) : ISC_R_UNEXPECTED) + +#endif /* ISC_CONDITION_H */ |