| 1 | /********************************************************************** <BR>
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| 2 | This file is part of Crack dot Com's free source code release of
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| 3 | Golgotha. <a href="http://www.crack.com/golgotha_release"> <BR> for
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| 4 | information about compiling & licensing issues visit this URL</a>
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| 5 | <PRE> If that doesn't help, contact Jonathan Clark at
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| 6 | golgotha_source@usa.net (Subject should have "GOLG" in it)
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| 7 | ***********************************************************************/
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| 8 |
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| 9 | #include "tmanage.hh"
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| 10 | #include "threads/threads.hh"
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| 11 |
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| 12 | /*
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| 13 | static i4_critical_section_class r1_texture_alloc_lock;
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| 14 |
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| 15 | // Mmeory allocation might be called from a seperate thread so you should be aware
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| 16 | // of what the main program sees in memory at each stage of allocation.
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| 17 | // Since Garbage collection & free's will not occur while the texture loading thread
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| 18 | // (async_read) is active, this should not present any problems.
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| 19 |
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| 20 | r1_texture_node_struct *r1_texture_manager_class::free_node::alloc_some(sw32 alloc_size,
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| 21 | free_node *&last_ptr)
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| 22 | {
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| 23 | alloc_size=(alloc_size+3)&(~3);
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| 24 | r1_texture_node_struct *a=(r1_texture_node_struct *)this;
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| 25 |
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| 26 | // is there enough space to split the free node?
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| 27 | if (alloc_size+sizeof(r1_texture_node_struct)+4>size)
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| 28 | {
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| 29 | a->set_size((sw32)size+(sw32)sizeof(free_node)-(sw32)sizeof(r1_texture_node_struct));
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| 30 | last_ptr=next;
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| 31 |
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| 32 | }
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| 33 | else
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| 34 | {
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| 35 | // first setup the new free node
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| 36 | free_node *n=(free_node *)((w8 *)this+sizeof(r1_texture_node_struct)+alloc_size);
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| 37 | n->next=next;
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| 38 | n->size=(sw32)size-(sw32)sizeof(r1_texture_node_struct)-(sw32)alloc_size;
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| 39 |
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| 40 | a->set_size(alloc_size);
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| 41 |
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| 42 | // set the last pointer to the new me
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| 43 | last_ptr=n;
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| 44 | }
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| 45 |
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| 46 | return a;
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| 47 | }
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| 48 |
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| 49 |
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| 50 | r1_texture_node_struct *r1_texture_manager_class::alloc(sw32 size)
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| 51 | {
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| 52 | free_node *last=0, *next;
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| 53 | r1_texture_node_struct *ret;
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| 54 |
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| 55 | r1_texture_alloc_lock.lock();
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| 56 |
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| 57 | if (!first_free)
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| 58 | {
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| 59 | r1_texture_alloc_lock.unlock();
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| 60 | return 0;
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| 61 | }
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| 62 |
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| 63 | for (free_node *f=first_free; f!=end; f=f->next)
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| 64 | {
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| 65 | if (f->size>=size+(sw32)sizeof(r1_texture_node_struct)-(sw32)sizeof(free_node))
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| 66 | {
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| 67 | if (last)
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| 68 | ret=f->alloc_some(size, last->next);
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| 69 | else
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| 70 | ret=f->alloc_some(size, first_free);
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| 71 |
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| 72 | ret->vram_handle=0;
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| 73 |
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| 74 | r1_texture_alloc_lock.unlock();
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| 75 | return ret;
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| 76 | }
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| 77 | last=f;
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| 78 | }
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| 79 |
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| 80 | r1_texture_alloc_lock.unlock();
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| 81 | return 0;
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| 82 | }
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| 83 |
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| 84 | i4_bool r1_texture_manager_class::can_alloc(sw32 size)
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| 85 | {
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| 86 | if (!first_free)
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| 87 | return i4_F;
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| 88 |
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| 89 | for (free_node *f=first_free; f!=end; f=f->next)
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| 90 | if (f->size>=size+(sw32)sizeof(r1_texture_node_struct)-(sw32)sizeof(free_node))
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| 91 | return i4_T;
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| 92 | return i4_F;
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| 93 | }
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| 94 |
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| 95 | */
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