1 /**
2 *
3 * Copyright: Copyright Digital Mars 2011 - 2012.
4 * License: $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
5 * Authors: Martin Nowak
6 * Source: $(DRUNTIMESRC rt/tlsgc.d)
7 */
8
9 /* Copyright Digital Mars 2011.
10 * Distributed under the Boost Software License, Version 1.0.
11 * (See accompanying file LICENSE or copy at
12 * http://www.boost.org/LICENSE_1_0.txt)
13 */
14 module rt.tlsgc;
15
16 import core.stdc.stdlib;
17
18 static import rt.lifetime, rt.sections;
19
20 /**
21 * Per thread record to store thread associated data for garbage collection.
22 */
23 struct Data
24 {
25 typeof(rt.sections.initTLSRanges()) tlsRanges;
26 rt.lifetime.BlkInfo** blockInfoCache;
27 }
28
29 /**
30 * Initialization hook, called FROM each thread. No assumptions about
31 * module initialization state should be made.
32 */
init()33 void* init() nothrow @nogc
34 {
35 auto data = cast(Data*).malloc(Data.sizeof);
36 import core.exception;
37 if ( data is null ) core.exception.onOutOfMemoryError();
38 *data = Data.init;
39
40 // do module specific initialization
41 data.tlsRanges = rt.sections.initTLSRanges();
42 data.blockInfoCache = &rt.lifetime.__blkcache_storage;
43
44 return data;
45 }
46
47 /**
48 * Finalization hook, called FOR each thread. No assumptions about
49 * module initialization state should be made.
50 */
destroy(void * data)51 void destroy(void* data) nothrow @nogc
52 {
53 // do module specific finalization
54 rt.sections.finiTLSRanges((cast(Data*)data).tlsRanges);
55
56 .free(data);
57 }
58
59 alias void delegate(void* pstart, void* pend) nothrow ScanDg;
60
61 /**
62 * GC scan hook, called FOR each thread. Can be used to scan
63 * additional thread local memory.
64 */
scan(void * data,scope ScanDg dg)65 void scan(void* data, scope ScanDg dg) nothrow
66 {
67 // do module specific marking
68 rt.sections.scanTLSRanges((cast(Data*)data).tlsRanges, dg);
69 }
70
71 alias int delegate(void* addr) nothrow IsMarkedDg;
72
73 /**
74 * GC sweep hook, called FOR each thread. Can be used to free
75 * additional thread local memory or associated data structures. Note
76 * that only memory allocated from the GC can have marks.
77 */
processGCMarks(void * data,scope IsMarkedDg dg)78 void processGCMarks(void* data, scope IsMarkedDg dg) nothrow
79 {
80 // do module specific sweeping
81 rt.lifetime.processGCMarks(*(cast(Data*)data).blockInfoCache, dg);
82 }
83