2 * Copyright 2011 Xamarin Inc (http://www.xamarin.com)
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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21 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 #ifndef __MONO_SGEN_GRAY_H__
24 #define __MONO_SGEN_GRAY_H__
26 #define SGEN_GRAY_QUEUE_SECTION_SIZE (128 - 3)
29 * This is a stack now instead of a queue, so the most recently added items are removed
30 * first, improving cache locality, and keeping the stack size manageable.
32 typedef struct _GrayQueueSection GrayQueueSection;
33 struct _GrayQueueSection {
35 GrayQueueSection *next;
36 char *objects [SGEN_GRAY_QUEUE_SECTION_SIZE];
39 typedef struct _SgenGrayQueue SgenGrayQueue;
41 typedef void (*GrayQueueAllocPrepareFunc) (SgenGrayQueue*);
43 struct _SgenGrayQueue {
44 GrayQueueSection *first;
45 GrayQueueSection *free_list;
47 GrayQueueAllocPrepareFunc alloc_prepare_func;
48 void *alloc_prepare_data;
51 void sgen_gray_object_enqueue (SgenGrayQueue *queue, char *obj) MONO_INTERNAL;
52 char* sgen_gray_object_dequeue (SgenGrayQueue *queue) MONO_INTERNAL;
53 GrayQueueSection* sgen_gray_object_dequeue_section (SgenGrayQueue *queue) MONO_INTERNAL;
54 void sgen_gray_object_enqueue_section (SgenGrayQueue *queue, GrayQueueSection *section) MONO_INTERNAL;
55 void sgen_gray_object_queue_init (SgenGrayQueue *queue) MONO_INTERNAL;
56 void sgen_gray_object_queue_init_with_alloc_prepare (SgenGrayQueue *queue, GrayQueueAllocPrepareFunc func, void *data) MONO_INTERNAL;
57 void sgen_gray_object_alloc_queue_section (SgenGrayQueue *queue) MONO_INTERNAL;
58 void sgen_gray_object_free_queue_section (GrayQueueSection *section) MONO_INTERNAL;
59 gboolean sgen_drain_gray_stack (SgenGrayQueue *queue, int max_objs) MONO_INTERNAL;
61 static inline gboolean
62 sgen_gray_object_queue_is_empty (SgenGrayQueue *queue)
64 return queue->first == NULL;