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