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/*
//
// suballoc.h
//
// Memory suballocation ... rather than go out to heap for all the memory,
// htp maintains a small cache of recently allocated memory for speedier
// requests
//
// Copyright (c) 1995-96 Jim Nelson. Permission to distribute
// granted by the author. No warranties are made on the fitness of this
// source code.
//
*/
#ifndef SUBALLOC_H
#define SUBALLOC_H
/*
// performance counters
*/
#if DEBUG
extern uint totalAllocations;
extern uint freePoolHits;
#endif
/*
// suballoc has several features that can be controlled via #defines
// most features are turned off for release versions of the software to
// speed up execution
//
// These features are:
//
// SUBALLOC_WARNING prints warning to stdout when problems are
// detected
//
// SUBALLOC_CLEARMEM all memory is cleared with a special bit
// pattern (not all zero or all one) when
// allocated and freed
//
// SUBALLOC_DEBLOG will print all allocs and frees to a debug
// log
//
// SUBALLOC_MINALLOCSIZE size (in bytes) of minimum allocation ...
// helps prevent heap thrashing when lots of
// small allocations occur ... if set to 0
// then allocation sizes match requested size
//
// SUBALLOC_FIRSTFIT if set, suballoc pulls the first properly sized
// block out of its free pool, rather than the
// one with the best fit ... faster, but may lead
// to unnecessary allocs from the system heap
//
// SUBALLOC_MAXFREEPOOLSIZE if set, suballoc will keep the free pool
// size equal to or less than this amount
// ... too small a size will lead to excessive
// heap allocations, too large could cause the
// program to keep vital memory from the operating
// system
//
*/
#define SUBALLOC_MINALLOCSIZE (64)
#define SUBALLOC_FIRSTFIT (1)
#if DEBUG
#define SUBALLOC_WARNING (1)
#define SUBALLOC_CLEARMEM (1)
#define SUBALLOC_DEBLOG (0)
#else
#define SUBALLOC_WARNING (0)
#define SUBALLOC_CLEARMEM (0)
#define SUBALLOC_DEBLOG (0)
#endif
#if __MSDOS__
#define SUBALLOC_MAXFREEPOOLSIZE (60 * KBYTE)
#else
#define SUBALLOC_MAXFREEPOOLSIZE (512 * KBYTE)
#endif
/*
// Initialize and terminate functions ... should be called before and
// after using following functions
*/
void InitializeMemory(void);
void TerminateMemory(void);
/*
// AllocMemory
//
// malloc() look-alike
*/
void *_AllocMemory(uint size, const char *file, uint line);
#define AllocMemory(size) _AllocMemory(size, __FILE__, __LINE__)
/*
// FreeMemory
//
// free() look-alike
*/
void _FreeMemory(void *ptr, const char *file, uint line);
#define FreeMemory(ptr) _FreeMemory(ptr, __FILE__, __LINE__);
/*
// ResizeMemory
//
// realloc() look-alike
*/
void *_ResizeMemory(void *ptr, uint newSize, const char *file, uint line);
#define ResizeMemory(ptr, newSize) \
_ResizeMemory(ptr, newSize, __FILE__, __LINE__)
/*
// MemorySize
//
// Returns available size of buffer
*/
uint MemorySize(void *ptr);
#endif
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