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51 lines
1.2 KiB
51 lines
1.2 KiB
/* |
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* alloc.c - specialized allocator for internal objects |
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* |
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* Copyright (C) 2006 Linus Torvalds |
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* |
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* The standard malloc/free wastes too much space for objects, partly because |
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* it maintains all the allocation infrastructure (which isn't needed, since |
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* we never free an object descriptor anyway), but even more because it ends |
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* up with maximal alignment because it doesn't know what the object alignment |
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* for the new allocation is. |
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*/ |
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#include "cache.h" |
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#include "object.h" |
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#include "blob.h" |
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#include "tree.h" |
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#include "commit.h" |
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#include "tag.h" |
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#define BLOCKING 1024 |
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#define DEFINE_ALLOCATOR(name) \ |
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static unsigned int name##_allocs; \ |
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struct name *alloc_##name##_node(void) \ |
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{ \ |
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static int nr; \ |
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static struct name *block; \ |
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\ |
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if (!nr) { \ |
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nr = BLOCKING; \ |
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block = xcalloc(BLOCKING, sizeof(struct name)); \ |
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} \ |
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nr--; \ |
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name##_allocs++; \ |
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return block++; \ |
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} |
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DEFINE_ALLOCATOR(blob) |
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DEFINE_ALLOCATOR(tree) |
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DEFINE_ALLOCATOR(commit) |
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DEFINE_ALLOCATOR(tag) |
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#define REPORT(name) \ |
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fprintf(stderr, "%10s: %8u (%zu kB)\n", #name, name##_allocs, name##_allocs*sizeof(struct name) >> 10) |
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void alloc_report(void) |
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{ |
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REPORT(blob); |
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REPORT(tree); |
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REPORT(commit); |
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REPORT(tag); |
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}
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