nearheap.c File Reference

Near-heap descriptor allocation and compaction carried over from DOS. More...

#include <process.h>
#include "wc1.h"

Go to the source code of this file.

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

Variables
int	nNearHeapSize
int	nNearHeapBase
int	nCurrentNearHeapFirstDescriptor
void *	pCurrentNearHeapAlloc
short	nNavMapMaximumPositionX
short	nNavigationMapMinimumCoordX
unsigned short	awMapNavObjectiveLabelIndex [16]
short	nNavMapMaximumPosY
short	nNavMapCentreX
short	nNavigationMapMinimumPositionY
TextContext	stCurrentNavMapTxtCtx
static short	nNearHeapActive = 0
short	nNearHeapMaxDescriptors = 0x80
static unsigned int	nNearHeapRelocationBytes = 0

Detailed Description

Near-heap descriptor allocation and compaction carried over from DOS.

Address range 40e890-40efdf.

Definition in file nearheap.c.

Function Documentation

AllocateNearHeapBlockByFlags()

void * AllocateNearHeapBlockByFlags	(	int	size,
		unsigned short	flags )

Definition at line 246 of file nearheap.c.

References NearHeapBlock::address, AllocateNearHeapBlockByFlags(), AllocateNearHeapBlockFromEnd(), DosNearPtrToFar(), nCurrentNearHeapFirstDescriptor, nNearHeapBase, nNearHeapMaxDescriptors, nNearHeapSize, and NearHeapBlock::sizeAndFlags.

Referenced by AllocateNearHeapBlockByFlags().

AllocateNearHeapBlockFromEnd()

void * AllocateNearHeapBlockFromEnd	(	int	size,
		unsigned short	flags )

Definition at line 153 of file nearheap.c.

References NearHeapBlock::address, AllocateNearHeapBlockFromEnd(), DosNearPtrToFar(), nCurrentNearHeapFirstDescriptor, nNearHeapBase, nNearHeapMaxDescriptors, nNearHeapSize, and NearHeapBlock::sizeAndFlags.

Referenced by AllocateNearHeapBlockByFlags(), and AllocateNearHeapBlockFromEnd().

FreeNearHeapBlock()

void FreeNearHeapBlock

(

void *

pointer

)

Definition at line 342 of file nearheap.c.

References NearHeapBlock::address, DosFarPtrToNear(), DosNearPtrToFar(), FreeNearHeapBlock(), nCurrentNearHeapFirstDescriptor, nNearHeapBase, nNearHeapSize, ReleaseNearHeapBlock(), and NearHeapBlock::sizeAndFlags.

Referenced by FreeNearHeapBlock().

GetNearHeapBlockSize()

int GetNearHeapBlockSize

(

void *

pointer

)

Definition at line 368 of file nearheap.c.

References NearHeapBlock::address, DosFarPtrToNear(), DosNearPtrToFar(), GetNearHeapBlockSize(), nCurrentNearHeapFirstDescriptor, nNearHeapBase, nNearHeapSize, and NearHeapBlock::sizeAndFlags.

Referenced by GetNearHeapBlockSize().

InitializeNearHeap()

unsigned short InitializeNearHeap

(

void

)

Definition at line 95 of file nearheap.c.

References AllocateTaggedMemory(), DosFarPtrToNear(), DosMemcpy(), DosNearPtrToFar(), FreeIfNotNull(), GetNavRangeSentinel(), InitializeNearHeap(), nNearHeapActive, nNearHeapBase, nNearHeapMaxDescriptors, nNearHeapRelocationBytes, nNearHeapSize, pCurrentNearHeapAlloc, and PurgeNearHeapBlocks().

Referenced by InitializeNearHeap().

MergeAdjacentNearHeapBlocks()

unsigned short MergeAdjacentNearHeapBlocks

(

int

descriptorAddress

)

Definition at line 25 of file nearheap.c.

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

Referenced by MergeAdjacentNearHeapBlocks(), and ReleaseNearHeapBlock().

PurgeNearHeapBlocks()

void PurgeNearHeapBlocks

(

unsigned short

flags

)

Definition at line 69 of file nearheap.c.

References NearHeapBlock::address, DosNearPtrToFar(), nCurrentNearHeapFirstDescriptor, nNearHeapActive, nNearHeapBase, nNearHeapMaxDescriptors, nNearHeapSize, PurgeNearHeapBlocks(), ReleaseNearHeapBlock(), and NearHeapBlock::sizeAndFlags.

Referenced by InitializeNearHeap(), and PurgeNearHeapBlocks().

ReleaseNearHeapBlock()

int ReleaseNearHeapBlock

(

int

descriptorAddress

)

Definition at line 49 of file nearheap.c.

References DosNearPtrToFar(), MergeAdjacentNearHeapBlocks(), nCurrentNearHeapFirstDescriptor, nNearHeapBase, nNearHeapSize, ReleaseNearHeapBlock(), and NearHeapBlock::sizeAndFlags.

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

ShutdownNearHeap()

void ShutdownNearHeap

(

void

)

Definition at line 138 of file nearheap.c.

References DosMemcpy(), DosNearPtrToFar(), FreeIfNotNull(), nNearHeapActive, nNearHeapBase, nNearHeapRelocationBytes, nNearHeapSize, pCurrentNearHeapAlloc, and ShutdownNearHeap().

Referenced by ShutdownNearHeap().

Variable Documentation

awMapNavObjectiveLabelIndex

unsigned short awMapNavObjectiveLabelIndex[16]

Definition at line 18 of file nearheap.c.

Referenced by BuildMap(), and SelectNavObjectiveAtPoint().

nCurrentNearHeapFirstDescriptor

int nCurrentNearHeapFirstDescriptor

Definition at line 14 of file nearheap.c.

Referenced by AllocateNearHeapBlockByFlags(), AllocateNearHeapBlockFromEnd(), FreeNearHeapBlock(), GetFreeNearHeapBytes(), GetLargestFreeNearHeapBlock(), GetNearHeapBlockSize(), MergeAdjacentNearHeapBlocks(), PurgeNearHeapBlocks(), and ReleaseNearHeapBlock().

nNavigationMapMinimumCoordX

short nNavigationMapMinimumCoordX

Definition at line 17 of file nearheap.c.

Referenced by CheckPoint(), and SetScale().

nNavigationMapMinimumPositionY

short nNavigationMapMinimumPositionY

Definition at line 21 of file nearheap.c.

Referenced by CheckPoint(), and SetScale().

nNavMapCentreX

short nNavMapCentreX

Definition at line 20 of file nearheap.c.

Referenced by ScaleNavMapCoordinates(), and SetScale().

nNavMapMaximumPositionX

short nNavMapMaximumPositionX

Definition at line 16 of file nearheap.c.

Referenced by CheckPoint(), and SetScale().

nNavMapMaximumPosY

short nNavMapMaximumPosY

Definition at line 19 of file nearheap.c.

Referenced by CheckPoint(), and SetScale().

nNearHeapActive

short nNearHeapActive = 0

static

Definition at line 64 of file nearheap.c.

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

nNearHeapBase

int nNearHeapBase

Definition at line 13 of file nearheap.c.

Referenced by AllocateNearHeapBlockByFlags(), AllocateNearHeapBlockFromEnd(), FreeNearHeapBlock(), GetFreeNearHeapBytes(), GetLargestFreeNearHeapBlock(), GetNearHeapBlockSize(), InitializeNearHeap(), PurgeNearHeapBlocks(), ReleaseNearHeapBlock(), and ShutdownNearHeap().

nNearHeapMaxDescriptors

short nNearHeapMaxDescriptors = 0x80

Definition at line 65 of file nearheap.c.

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

nNearHeapRelocationBytes

unsigned int nNearHeapRelocationBytes = 0

static

Definition at line 66 of file nearheap.c.

Referenced by InitializeNearHeap(), and ShutdownNearHeap().

nNearHeapSize

int nNearHeapSize

Definition at line 12 of file nearheap.c.

Referenced by AllocateNearHeapBlockByFlags(), AllocateNearHeapBlockFromEnd(), FreeNearHeapBlock(), GetFreeNearHeapBytes(), GetLargestFreeNearHeapBlock(), GetNearHeapBlockSize(), InitializeNearHeap(), PurgeNearHeapBlocks(), ReleaseNearHeapBlock(), and ShutdownNearHeap().

pCurrentNearHeapAlloc

void* pCurrentNearHeapAlloc

Definition at line 15 of file nearheap.c.

Referenced by InitializeNearHeap(), and ShutdownNearHeap().

stCurrentNavMapTxtCtx

TextContext stCurrentNavMapTxtCtx

Definition at line 22 of file nearheap.c.

Referenced by DrawNavLocationReadout(), InflightComputer(), and UpdateInflightNavText().