Mercurial > projects > ldc
view druntime/src/gc/stub/gc.d @ 759:d3eb054172f9
Added copy of druntime from DMD 2.020 modified for LDC.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
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date | Tue, 11 Nov 2008 01:52:37 +0100 |
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/** * This module contains a minimal garbage collector implementation according to * published requirements. This library is mostly intended to serve as an * example, but it is usable in applications which do not rely on a garbage * collector to clean up memory (ie. when dynamic array resizing is not used, * and all memory allocated with 'new' is freed deterministically with * 'delete'). * * Please note that block attribute data must be tracked, or at a minimum, the * FINALIZE bit must be tracked for any allocated memory block because calling * rt_finalize on a non-object block can result in an access violation. In the * allocator below, this tracking is done via a leading uint bitmask. A real * allocator may do better to store this data separately, similar to the basic * GC. * * Copyright: Public Domain * License: Public Domain * Authors: Sean Kelly */ module gc.gc; private import stdc.stdlib; private { enum BlkAttr : uint { FINALIZE = 0b0000_0001, NO_SCAN = 0b0000_0010, NO_MOVE = 0b0000_0100, ALL_BITS = 0b1111_1111 } struct BlkInfo { void* base; size_t size; uint attr; } extern (C) void thread_init(); extern (C) void onOutOfMemoryError(); } extern (C) void gc_init() { // NOTE: The GC must initialize the thread library before its first // collection, and always before returning from gc_init(). thread_init(); } extern (C) void gc_term() { } extern (C) void gc_enable() { } extern (C) void gc_disable() { } extern (C) void gc_collect() { } extern (C) void gc_minimize() { } extern (C) uint gc_getAttr( void* p ) { return 0; } extern (C) uint gc_setAttr( void* p, uint a ) { return 0; } extern (C) uint gc_clrAttr( void* p, uint a ) { return 0; } extern (C) void* gc_malloc( size_t sz, uint ba = 0 ) { void* p = malloc( sz ); if( sz && p is null ) onOutOfMemoryError(); return p; } extern (C) void* gc_calloc( size_t sz, uint ba = 0 ) { void* p = calloc( 1, sz ); if( sz && p is null ) onOutOfMemoryError(); return p; } extern (C) void* gc_realloc( void* p, size_t sz, uint ba = 0 ) { p = realloc( p, sz ); if( sz && p is null ) onOutOfMemoryError(); return p; } extern (C) size_t gc_extend( void* p, size_t mx, size_t sz ) { return 0; } extern (C) size_t gc_reserve( size_t sz ) { return 0; } extern (C) void gc_free( void* p ) { free( p ); } extern (C) void* gc_addrOf( void* p ) { return null; } extern (C) size_t gc_sizeOf( void* p ) { return 0; } extern (C) BlkInfo gc_query( void* p ) { return BlkInfo.init; } extern (C) void gc_addRoot( void* p ) { } extern (C) void gc_addRange( void* p, size_t sz ) { } extern (C) void gc_removeRoot( void *p ) { } extern (C) void gc_removeRange( void *p ) { } extern (C) void* gc_getHandle() { return null; } extern (C) void gc_setHandle(void* p) { } extern (C) void gc_endHandle() { }