67 lines
1.3 KiB
C++
67 lines
1.3 KiB
C++
// Copyright (c) 1994 James Clark
|
|
// See the file COPYING for copying permission.
|
|
|
|
#ifndef Allocator_INCLUDED
|
|
#define Allocator_INCLUDED 1
|
|
|
|
#include <stddef.h>
|
|
|
|
#ifdef SP_NAMESPACE
|
|
namespace SP_NAMESPACE {
|
|
#endif
|
|
|
|
class SP_API Allocator {
|
|
public:
|
|
Allocator(size_t maxSize, unsigned blocksPerSegment);
|
|
~Allocator();
|
|
void *alloc(size_t);
|
|
static void *allocSimple(size_t);
|
|
static void free(void *);
|
|
|
|
// It would be nice to make these private, but some compilers have problems.
|
|
union ForceAlign {
|
|
unsigned long n;
|
|
struct SP_API {
|
|
char c;
|
|
} s;
|
|
char *cp;
|
|
long *lp;
|
|
};
|
|
struct SegmentHeader;
|
|
union BlockHeader;
|
|
friend union BlockHeader;
|
|
union BlockHeader {
|
|
SegmentHeader *seg;
|
|
ForceAlign align;
|
|
};
|
|
struct Block;
|
|
friend struct Block;
|
|
struct SP_API Block {
|
|
BlockHeader header;
|
|
Block *next;
|
|
};
|
|
friend struct SegmentHeader;
|
|
struct SP_API SegmentHeader {
|
|
union {
|
|
Block **freeList;
|
|
ForceAlign align;
|
|
};
|
|
unsigned liveCount;
|
|
SegmentHeader *next;
|
|
};
|
|
private:
|
|
Allocator(const Allocator &); // undefined
|
|
Allocator &operator=(const Allocator &); // undefined
|
|
Block *freeList_;
|
|
size_t objectSize_;
|
|
unsigned blocksPerSegment_;
|
|
SegmentHeader *segments_;
|
|
void *alloc1();
|
|
void tooBig(size_t);
|
|
};
|
|
|
|
#ifdef SP_NAMESPACE
|
|
}
|
|
#endif
|
|
|
|
#endif /* not Allocator_INCLUDED */
|