You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
52 lines
1.2 KiB
52 lines
1.2 KiB
19 years ago
|
/*
|
||
|
|
* alloc.c - specialized allocator for internal objects
|
||
|
|
*
|
||
|
|
* Copyright (C) 2006 Linus Torvalds
|
||
|
|
*
|
||
|
|
* The standard malloc/free wastes too much space for objects, partly because
|
||
|
|
* it maintains all the allocation infrastructure (which isn't needed, since
|
||
|
|
* we never free an object descriptor anyway), but even more because it ends
|
||
|
|
* up with maximal alignment because it doesn't know what the object alignment
|
||
|
|
* for the new allocation is.
|
||
|
|
*/
|
||
|
|
#include "cache.h"
|
||
|
|
#include "object.h"
|
||
|
|
#include "blob.h"
|
||
|
|
#include "tree.h"
|
||
|
|
#include "commit.h"
|
||
|
|
#include "tag.h"
|
||
|
|
|
||
|
|
#define BLOCKING 1024
|
||
|
|
|
||
|
|
#define DEFINE_ALLOCATOR(name) \
|
||
|
|
static unsigned int name##_allocs; \
|
||
|
|
struct name *alloc_##name##_node(void) \
|
||
|
|
{ \
|
||
|
|
static int nr; \
|
||
|
|
static struct name *block; \
|
||
|
|
\
|
||
|
|
if (!nr) { \
|
||
|
|
nr = BLOCKING; \
|
||
|
|
block = xcalloc(BLOCKING, sizeof(struct name)); \
|
||
|
|
} \
|
||
|
|
nr--; \
|
||
|
|
name##_allocs++; \
|
||
|
|
return block++; \
|
||
|
|
}
|
||
|
|
|
||
|
|
DEFINE_ALLOCATOR(blob)
|
||
|
|
DEFINE_ALLOCATOR(tree)
|
||
|
|
DEFINE_ALLOCATOR(commit)
|
||
|
|
DEFINE_ALLOCATOR(tag)
|
||
|
|
|
||
|
|
#define REPORT(name) \
|
||
|
|
fprintf(stderr, "%10s: %8u (%zu kB)\n", #name, name##_allocs, name##_allocs*sizeof(struct name) >> 10)
|
||
|
|
|
||
|
|
void alloc_report(void)
|
||
|
|
{
|
||
|
|
REPORT(blob);
|
||
|
|
REPORT(tree);
|
||
|
|
REPORT(commit);
|
||
|
|
REPORT(tag);
|
||
|
|
}
|