summaryrefslogtreecommitdiffstats
path: root/memory/mozjemalloc/qr.h
diff options
context:
space:
mode:
Diffstat (limited to 'memory/mozjemalloc/qr.h')
-rw-r--r--memory/mozjemalloc/qr.h98
1 files changed, 98 insertions, 0 deletions
diff --git a/memory/mozjemalloc/qr.h b/memory/mozjemalloc/qr.h
new file mode 100644
index 000000000..ee60491d7
--- /dev/null
+++ b/memory/mozjemalloc/qr.h
@@ -0,0 +1,98 @@
+/******************************************************************************
+ *
+ * Copyright (C) 2002 Jason Evans <jasone@canonware.com>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice(s), this list of conditions and the following disclaimer
+ * unmodified other than the allowable addition of one or more
+ * copyright notices.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice(s), this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************/
+
+/* Ring definitions. */
+#define qr(a_type) \
+struct { \
+ a_type *qre_next; \
+ a_type *qre_prev; \
+}
+
+/* Ring functions. */
+#define qr_new(a_qr, a_field) do { \
+ (a_qr)->a_field.qre_next = (a_qr); \
+ (a_qr)->a_field.qre_prev = (a_qr); \
+} while (0)
+
+#define qr_next(a_qr, a_field) ((a_qr)->a_field.qre_next)
+
+#define qr_prev(a_qr, a_field) ((a_qr)->a_field.qre_prev)
+
+#define qr_before_insert(a_qrelm, a_qr, a_field) do { \
+ (a_qr)->a_field.qre_prev = (a_qrelm)->a_field.qre_prev; \
+ (a_qr)->a_field.qre_next = (a_qrelm); \
+ (a_qr)->a_field.qre_prev->a_field.qre_next = (a_qr); \
+ (a_qrelm)->a_field.qre_prev = (a_qr); \
+} while (0)
+
+#define qr_after_insert(a_qrelm, a_qr, a_field) \
+ do \
+ { \
+ (a_qr)->a_field.qre_next = (a_qrelm)->a_field.qre_next; \
+ (a_qr)->a_field.qre_prev = (a_qrelm); \
+ (a_qr)->a_field.qre_next->a_field.qre_prev = (a_qr); \
+ (a_qrelm)->a_field.qre_next = (a_qr); \
+ } while (0)
+
+#define qr_meld(a_qr_a, a_qr_b, a_field) do { \
+ void *t; \
+ (a_qr_a)->a_field.qre_prev->a_field.qre_next = (a_qr_b); \
+ (a_qr_b)->a_field.qre_prev->a_field.qre_next = (a_qr_a); \
+ t = (a_qr_a)->a_field.qre_prev; \
+ (a_qr_a)->a_field.qre_prev = (a_qr_b)->a_field.qre_prev; \
+ (a_qr_b)->a_field.qre_prev = t; \
+} while (0)
+
+/* qr_meld() and qr_split() are functionally equivalent, so there's no need to
+ * have two copies of the code. */
+#define qr_split(a_qr_a, a_qr_b, a_field) \
+ qr_meld((a_qr_a), (a_qr_b), a_field)
+
+#define qr_remove(a_qr, a_field) do { \
+ (a_qr)->a_field.qre_prev->a_field.qre_next \
+ = (a_qr)->a_field.qre_next; \
+ (a_qr)->a_field.qre_next->a_field.qre_prev \
+ = (a_qr)->a_field.qre_prev; \
+ (a_qr)->a_field.qre_next = (a_qr); \
+ (a_qr)->a_field.qre_prev = (a_qr); \
+} while (0)
+
+#define qr_foreach(var, a_qr, a_field) \
+ for ((var) = (a_qr); \
+ (var) != NULL; \
+ (var) = (((var)->a_field.qre_next != (a_qr)) \
+ ? (var)->a_field.qre_next : NULL))
+
+#define qr_reverse_foreach(var, a_qr, a_field) \
+ for ((var) = ((a_qr) != NULL) ? qr_prev(a_qr, a_field) : NULL; \
+ (var) != NULL; \
+ (var) = (((var) != (a_qr)) \
+ ? (var)->a_field.qre_prev : NULL))