add

lib/isc/util.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 1998  Internet Software Consortium.
+ * 
+ * Permission to use, copy, modify, and 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+ * CONSORTIUM 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.
+ */
+
+#ifndef ISC_UTIL_H
+#define ISC_UTIL_H 1
+
+/***
+ *** General Macros.
+ ***/
+
+/*
+ * We use macros instead of calling the routines directly because
+ * the capital letters make the locking stand out.
+ *
+ * We INSIST that they succeed since there's no way for us to continue
+ * if they fail.
+ */
+
+#define LOCK(lp) \
+	INSIST(isc_mutex_lock((lp)) == ISC_R_SUCCESS);
+#define UNLOCK(lp) \
+	INSIST(isc_mutex_unlock((lp)) == ISC_R_SUCCESS);
+#define BROADCAST(cvp) \
+	INSIST(isc_condition_broadcast((cvp)) == ISC_R_SUCCESS);
+#define SIGNAL(cvp) \
+	INSIST(isc_condition_signal((cvp)) == ISC_R_SUCCESS);
+#define WAIT(cvp, lp) \
+	INSIST(isc_condition_wait((cvp), (lp)) == ISC_R_SUCCESS);
+
+/*
+ * isc_condition_waituntil can return ISC_R_TIMEDOUT, so we
+ * don't INSIST the result is ISC_R_SUCCESS.
+ */
+
+#define WAITUNTIL(cvp, lp, tp) \
+	isc_condition_waituntil((cvp), (lp), (tp))
+
+#endif /* ISC_UTIL_H */