nearheap.c File Reference

Near heap allocator. More...

#include "game.h"
#include <float.h>

Go to the source code of this file.

Macros
#define	NEARHEAP_C

Functions
short	MergeAdjacentNearHeapBlocks (int descriptorAddress)
int	ReleaseNearHeapBlock (int descriptorAddress)
void	PurgeNearHeapBlocks (short flags)
unsigned short	InitializeNearHeap (void)
void	ShutdownNearHeap (void)
void *	AllocateNearHeapBlockFromEnd (int size, short flags)
void *	AllocateNearHeapBlockByFlags (int size, short flags)
void	FreeNearHeapBlock (void *pointer)
int	GetNearHeapBlockSize (void *pointer)

Variables
volatile short	g_nNearHeapActive = 0
volatile short	g_nNearHeapMaxDescriptors = 0x80
volatile int	g_nNearHeapRelocationBytes = 0
volatile int	g_nNearArenaSize
volatile int	g_1_nNearHeapBase
int	g_nNearHeapFirstDescriptor
void *volatile	g_1_pNearHeapAllocationPtr

Detailed Description

Near heap allocator.

Definition in file nearheap.c.

Macro Definition Documentation

NEARHEAP_C

#define NEARHEAP_C

Definition at line 6 of file nearheap.c.

Function Documentation

AllocateNearHeapBlockByFlags()

void * AllocateNearHeapBlockByFlags	(	int	size,
		short	flags )

Definition at line 229 of file nearheap.c.

References NearHeapBlock::address, AllocateNearHeapBlockByFlags(), AllocateNearHeapBlockFromEnd(), DosNearPtrToFar(), g_1_nNearHeapBase, g_nNearArenaSize, g_nNearHeapFirstDescriptor, g_nNearHeapMaxDescriptors, and NearHeapBlock::sizeAndFlags.

Referenced by AllocateNearHeapBlockByFlags().

AllocateNearHeapBlockFromEnd()

void * AllocateNearHeapBlockFromEnd	(	int	size,
		short	flags )

Definition at line 144 of file nearheap.c.

References NearHeapBlock::address, AllocateNearHeapBlockFromEnd(), DosNearPtrToFar(), g_1_nNearHeapBase, g_nNearArenaSize, g_nNearHeapFirstDescriptor, g_nNearHeapMaxDescriptors, and NearHeapBlock::sizeAndFlags.

Referenced by AllocateNearHeapBlockByFlags(), and AllocateNearHeapBlockFromEnd().

FreeNearHeapBlock()

void FreeNearHeapBlock

(

void *

pointer

)

Definition at line 319 of file nearheap.c.

References NearHeapBlock::address, DosFarPtrToNear(), DosNearPtrToFar(), FreeNearHeapBlock(), g_1_nNearHeapBase, g_nNearArenaSize, g_nNearHeapFirstDescriptor, ReleaseNearHeapBlock(), and NearHeapBlock::sizeAndFlags.

Referenced by FreeNearHeapBlock(), and UpdateShipTurretGuns().

GetNearHeapBlockSize()

int GetNearHeapBlockSize

(

void *

pointer

)

Definition at line 341 of file nearheap.c.

References NearHeapBlock::address, DosFarPtrToNear(), DosNearPtrToFar(), g_1_nNearHeapBase, g_nNearArenaSize, g_nNearHeapFirstDescriptor, GetNearHeapBlockSize(), and NearHeapBlock::sizeAndFlags.

Referenced by GetNearHeapBlockSize(), and UpdateShipTurretGuns().

InitializeNearHeap()

unsigned short InitializeNearHeap

(

void

)

Definition at line 86 of file nearheap.c.

References AllocateTaggedMemory(), DosFarPtrToNear(), DosMemmove(), DosNearPtrToFar(), FreeIfNotNull(), g_1_nNearHeapBase, g_1_pNearHeapAllocationPtr, g_nNearArenaSize, g_nNearHeapActive, g_nNearHeapMaxDescriptors, g_nNearHeapRelocationBytes, GetNavRangeSentinel(), InitializeNearHeap(), and PurgeNearHeapBlocks().

Referenced by InitializeNearHeap().

MergeAdjacentNearHeapBlocks()

short MergeAdjacentNearHeapBlocks

(

int

descriptorAddress

)

Definition at line 15 of file nearheap.c.

References NearHeapBlock::address, DosNearPtrToFar(), g_nNearHeapFirstDescriptor, MergeAdjacentNearHeapBlocks(), and NearHeapBlock::sizeAndFlags.

Referenced by MergeAdjacentNearHeapBlocks(), and ReleaseNearHeapBlock().

PurgeNearHeapBlocks()

void PurgeNearHeapBlocks

(

short

flags

)

Definition at line 57 of file nearheap.c.

References NearHeapBlock::address, DosNearPtrToFar(), g_1_nNearHeapBase, g_nNearArenaSize, g_nNearHeapActive, g_nNearHeapFirstDescriptor, g_nNearHeapMaxDescriptors, PurgeNearHeapBlocks(), ReleaseNearHeapBlock(), and NearHeapBlock::sizeAndFlags.

Referenced by InitializeNearHeap(), and PurgeNearHeapBlocks().

ReleaseNearHeapBlock()

int ReleaseNearHeapBlock

(

int

descriptorAddress

)

Definition at line 39 of file nearheap.c.

References DosNearPtrToFar(), g_1_nNearHeapBase, g_nNearArenaSize, g_nNearHeapFirstDescriptor, MergeAdjacentNearHeapBlocks(), ReleaseNearHeapBlock(), and NearHeapBlock::sizeAndFlags.

Referenced by FreeNearHeapBlock(), PurgeNearHeapBlocks(), and ReleaseNearHeapBlock().

ShutdownNearHeap()

void ShutdownNearHeap

(

void

)

Definition at line 127 of file nearheap.c.

References DosMemmove(), DosNearPtrToFar(), FreeIfNotNull(), g_1_nNearHeapBase, g_1_pNearHeapAllocationPtr, g_nNearArenaSize, g_nNearHeapActive, g_nNearHeapRelocationBytes, and ShutdownNearHeap().

Referenced by DrawTextAt(), and ShutdownNearHeap().

Variable Documentation

g_1_nNearHeapBase

volatile int g_1_nNearHeapBase

Definition at line 374 of file nearheap.c.

Referenced by AllocateNearHeapBlockByFlags(), AllocateNearHeapBlockFromEnd(), FreeNearHeapBlock(), GetAvailableMainMemory(), GetLargestMainMemoryBlock(), GetNearHeapBlockSize(), InitializeNearHeap(), PurgeNearHeapBlocks(), ReleaseNearHeapBlock(), and ShutdownNearHeap().

g_1_pNearHeapAllocationPtr

void* volatile g_1_pNearHeapAllocationPtr

Definition at line 376 of file nearheap.c.

Referenced by InitializeNearHeap(), and ShutdownNearHeap().

g_nNearArenaSize

volatile int g_nNearArenaSize

Definition at line 373 of file nearheap.c.

Referenced by AllocateNearHeapBlockByFlags(), AllocateNearHeapBlockFromEnd(), FreeNearHeapBlock(), GetAvailableMainMemory(), GetLargestMainMemoryBlock(), GetNearHeapBlockSize(), InitializeNearHeap(), PurgeNearHeapBlocks(), ReleaseNearHeapBlock(), and ShutdownNearHeap().

g_nNearHeapActive

volatile short g_nNearHeapActive = 0

Definition at line 9 of file nearheap.c.

Referenced by InitializeNearHeap(), PurgeNearHeapBlocks(), and ShutdownNearHeap().

g_nNearHeapFirstDescriptor

int g_nNearHeapFirstDescriptor

Definition at line 375 of file nearheap.c.

Referenced by AllocateNearHeapBlockByFlags(), AllocateNearHeapBlockFromEnd(), FreeNearHeapBlock(), GetAvailableMainMemory(), GetLargestMainMemoryBlock(), GetNearHeapBlockSize(), MergeAdjacentNearHeapBlocks(), PurgeNearHeapBlocks(), and ReleaseNearHeapBlock().

g_nNearHeapMaxDescriptors

volatile short g_nNearHeapMaxDescriptors = 0x80

Definition at line 10 of file nearheap.c.

Referenced by AllocateNearHeapBlockByFlags(), AllocateNearHeapBlockFromEnd(), InitializeNearHeap(), LoadOriginFxDrivers(), and PurgeNearHeapBlocks().

g_nNearHeapRelocationBytes

volatile int g_nNearHeapRelocationBytes = 0

Definition at line 11 of file nearheap.c.

Referenced by InitializeNearHeap(), and ShutdownNearHeap().