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authormarha <marha@users.sourceforge.net>2013-03-04 08:18:40 +0100
committermarha <marha@users.sourceforge.net>2013-03-04 08:18:40 +0100
commitd4d629b77742e60caac3d120ff40e9f386380af2 (patch)
treeed3eacb0fdcf29da0a24e03c4330ce8e3bb66718 /mesalib/src/gallium/auxiliary/util/u_range.h
parentc74ef795c7282681616decc36a9a81cd1b1b6ec7 (diff)
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fontconfig libX11 mesalib pixman xserver xkeyboard-config git update 4 Mar 2013
xserver commit 8f4640bdb9d3988148e09a08d2c7e3bab1d538d6 xkeyboard-config commit fa2f330df22511c3846cb1cb0760551c6e244a81 libX11 commit c23d61d1b84dca3740bf4786978c7908d0065fb9 pixman commit 5feda20fc39407879993ed4a6d861ef7f78d9432 fontconfig commit 612ee2a5c91b8929b2cc5abce4af84d8d7e66bd0 mesa commit e29124717eae4f8d329bb6a9707b802c0ff4bdd9
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diff --git a/mesalib/src/gallium/auxiliary/util/u_range.h b/mesalib/src/gallium/auxiliary/util/u_range.h
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+/*
+ * Copyright 2013 Marek Olšák <maraeo@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE. */
+
+/**
+ * @file
+ * 1D integer range, capable of the union and intersection operations.
+ *
+ * It only maintains a single interval which is extended when the union is
+ * done. This implementation is partially thread-safe (readers are not
+ * protected by a lock).
+ *
+ * @author Marek Olšák
+ */
+
+#ifndef U_RANGE_H
+#define U_RANGE_H
+
+#include "os/os_thread.h"
+
+struct util_range {
+ unsigned start; /* inclusive */
+ unsigned end; /* exclusive */
+
+ /* for the range to be consistent with multiple contexts: */
+ pipe_mutex write_mutex;
+};
+
+
+static INLINE void
+util_range_set_empty(struct util_range *range)
+{
+ range->start = ~0;
+ range->end = 0;
+}
+
+/* This is like a union of two sets. */
+static INLINE void
+util_range_add(struct util_range *range, unsigned start, unsigned end)
+{
+ if (start < range->start || end > range->end) {
+ pipe_mutex_lock(range->write_mutex);
+ range->start = MIN2(start, range->start);
+ range->end = MAX2(end, range->end);
+ pipe_mutex_unlock(range->write_mutex);
+ }
+}
+
+static INLINE boolean
+util_ranges_intersect(struct util_range *range, unsigned start, unsigned end)
+{
+ return MAX2(start, range->start) < MIN2(end, range->end);
+}
+
+
+/* Init/deinit */
+
+static INLINE void
+util_range_init(struct util_range *range)
+{
+ pipe_mutex_init(range->write_mutex);
+ util_range_set_empty(range);
+}
+
+static INLINE void
+util_range_destroy(struct util_range *range)
+{
+ pipe_mutex_destroy(range->write_mutex);
+}
+
+#endif