C++ HFree函数代码示例

void
TFB_UninitInput (void)
{
	VControl_Uninit ();
	HFree (controls);
	HFree (kbdstate);
}

BOOLEAN
_ReleaseCelData (void *handle)
{
	DRAWABLE DrawablePtr;
	int cel_ct;
	FRAME FramePtr = NULL;

	if ((DrawablePtr = handle) == 0)
		return (FALSE);

	cel_ct = DrawablePtr->MaxIndex + 1;
	FramePtr = DrawablePtr->Frame;

	HFree (handle);
	if (FramePtr)
	{
		int i;
		for (i = 0; i < cel_ct; i++)
		{
			TFB_Image *img = FramePtr[i].image;
			if (img)
			{
				FramePtr[i].image = NULL;
				TFB_DrawScreen_DeleteImage (img);
			}
		}
		HFree (FramePtr);
	}

	return (TRUE);
}

void 
TFB_DrawImage_Delete (TFB_Image *image)
{
	if (image == 0)
	{
		log_add (log_Warning, "INTERNAL ERROR: Tried to delete a null image!");
		/* Should we die here? */
		return;
	}
	LockMutex (image->mutex);

	TFB_DrawCanvas_Delete (image->NormalImg);
			
	if (image->ScaledImg) {
		TFB_DrawCanvas_Delete (image->ScaledImg);
	}

	if (image->Palette)
		HFree (image->Palette);

	UnlockMutex (image->mutex);
	DestroyMutex (image->mutex);
			
	HFree (image);
}

void
VideoDecoder_Free (TFB_VideoDecoder *decoder)
{
	if (!decoder)
		return;
	
	decoder->funcs->Close (decoder);
	decoder->funcs->Term (decoder);

	HFree (decoder->filename);
	HFree (decoder);
}

Thread
CreateThread_SDL (ThreadFunction func, void *data, SDWORD stackSize
#ifdef NAMED_SYNCHRO
		  , const char *name
#endif
	)
{
	TrueThread thread;
	struct ThreadStartInfo *startInfo;
	
	thread = (struct _thread *) HMalloc (sizeof *thread);
#ifdef NAMED_SYNCHRO
	thread->name = name;
#endif
#ifdef PROFILE_THREADS
	thread->startTime = GetTimeCounter ();
#endif

	thread->localData = CreateThreadLocal ();

	startInfo = (struct ThreadStartInfo *) HMalloc (sizeof (*startInfo));
	startInfo->func = func;
	startInfo->data = data;
	startInfo->sem = SDL_CreateSemaphore (0);
	startInfo->thread = thread;
	
	thread->native = SDL_CreateThread (ThreadHelper, (void *) startInfo);
	if (!(thread->native))
	{
		DestroyThreadLocal (thread->localData);
		HFree (startInfo);
		HFree (thread);
		return NULL;
	}
	// The responsibility to free 'startInfo' and 'thread' is now by the new
	// thread.
	
	QueueThread (thread);

#ifdef DEBUG_THREADS
#if 0	
	log_add (log_Debug, "Thread '%s' created.", ThreadName (thread));
	fflush (stderr);
#endif
#endif

	// Signal to the new thread that the thread structure is ready
	// and it can begin to use it.
	SDL_SemPost (startInfo->sem);

	(void) stackSize;  /* Satisfying compiler (unused parameter) */
	return thread;
}

void DeleteCeosRecord(CeosRecord_t *record)
{
    if(record)
    {
	if(record->Buffer)
	{
	    HFree(record->Buffer);
	    record->Buffer = NULL;
	}
        HFree( record );
    }
}

void
destroy_SoundChunk_list (TFB_SoundChunk *chunk)
{
    TFB_SoundChunk *next = NULL;
    for ( ; chunk; chunk = next)
    {
        next = chunk->next;
        if (chunk->decoder)
            SoundDecoder_Free (chunk->decoder);
        HFree (chunk->text);
        HFree (chunk);
    }
}

static int
ThreadHelper (void *startInfo) {
	ThreadFunction func;
	void *data;
	SDL_sem *sem;
	TrueThread thread;
	int result;
	
	func = ((struct ThreadStartInfo *) startInfo)->func;
	data = ((struct ThreadStartInfo *) startInfo)->data;
	sem  = ((struct ThreadStartInfo *) startInfo)->sem;

	// Wait until the Thread structure is available.
	SDL_SemWait (sem);
	SDL_DestroySemaphore (sem);
	thread = ((struct ThreadStartInfo *) startInfo)->thread;
	HFree (startInfo);

	result = (*func) (data);

#ifdef DEBUG_THREADS
	log_add (log_Debug, "Thread '%s' done (returned %d).",
			thread->name, result);
	fflush (stderr);
#endif

	UnQueueThread (thread);
	DestroyThreadLocal (thread->localData);
	FinishThread (thread);
	/* Destroying the thread is the responsibility of ProcessThreadLifecycles() */
	return result;
}

void
mixSDL_Uninit (void)
{
	int i;

	UninitStreamDecoder ();

	for (i = 0; i < NUM_SOUNDSOURCES; ++i)
	{
		if (soundSource[i].sample && soundSource[i].sample->decoder)
		{
			StopStream (i);
		}
		if (soundSource[i].sbuffer)
		{
			void *sbuffer = soundSource[i].sbuffer;
			soundSource[i].sbuffer = NULL;
			HFree (sbuffer);
		}
		DestroyMutex (soundSource[i].stream_mutex);
		soundSource[i].stream_mutex = 0;

		mixSDL_DeleteSources (1, &soundSource[i].handle);
	}

	SDL_CloseAudio ();
	mixer_Uninit ();
	SoundDecoder_Uninit ();
	SDL_QuitSubSystem (SDL_INIT_AUDIO);
}

/*
 * Closes srcHandle if it's not -1.
 * Closes dstHandle if it's not -1.
 * Removes unlinkpath from the unlinkHandle dir if it's not NULL.
 * Frees 'buf' if not NULL.
 * Always returns -1.
 * errno is what was before the call.
 */
static int
copyError(uio_Handle *srcHandle, uio_Handle *dstHandle,
		uio_DirHandle *unlinkHandle, const char *unlinkPath, uint8 *buf)
{
	int savedErrno;

	savedErrno = errno;

	log_add (log_Debug, "Error while copying: %s", strerror (errno));

	if (srcHandle != NULL)
		uio_close (srcHandle);
	
	if (dstHandle != NULL)
		uio_close (dstHandle);
	
	if (unlinkPath != NULL)
		uio_unlink (unlinkHandle, unlinkPath);
	
	if (buf != NULL)
		HFree(buf);
	
	errno = savedErrno;
	return -1;
}

static inline TFB_ColorMap *
alloc_colormap (void)
		// returns an addrefed object
{
	TFB_ColorMap *map;

	if (poolhead)
	{	// have some spares
		map = poolhead;
		poolhead = map->next;
		--poolcount;
	}
	else
	{	// no spares, need a new one
		map = HMalloc (sizeof (*map));
		map->palette = AllocNativePalette ();
		if (!map->palette)
		{
			HFree (map);
			return NULL;
		}
	}
	map->next = NULL;
	map->index = -1;
	map->refcount = 1;
	map->version = 0;

	return map;
}

static void ExtractInt(CeosRecord_t *record, int type, unsigned int offset, unsigned int length, int *value)
{
    void *buffer;
    char format[32];

    buffer = HMalloc( length + 1 );

    switch(type)
    {
    case __CEOS_REC_TYP_A:
        sprintf( format, "A%u", length );
        GetCeosField( record, offset, format,  buffer );
        *value = atoi( buffer );
        break;
    case __CEOS_REC_TYP_B:
        sprintf( format, "B%u", length );
#ifdef notdef
        GetCeosField( record, offset, format, buffer );
        if( length <= 4 )
            CeosToNative( value, buffer, length, length );
        else
            *value = 0;
#else
        GetCeosField( record, offset, format, value );
#endif
        break;
    case __CEOS_REC_TYP_I:
        sprintf( format, "I%u", length );
        GetCeosField( record, offset, format, value );
        break;
    }

    HFree( buffer );

}

BOOLEAN
_ReleaseFontData (void *handle)
{
	FONT font = (FONT) handle;
	if (font == NULL)
		return FALSE;

	{
		FONT_PAGE *page;
		FONT_PAGE *nextPage;

		for (page = font->fontPages; page != NULL; page = nextPage)
		{
			size_t charI;
			for (charI = 0; charI < page->numChars; charI++)
			{
				TFB_Char *c = &page->charDesc[charI];
				
				if (c->data == NULL)
					continue;
				
				// XXX: fix this if fonts get per-page data
				//  rather than per-char
				TFB_DrawScreen_DeleteData (c->data);
			}
		
			nextPage = page->next;
			FreeFontPage (page);
		}
	}

	HFree (font);

	return TRUE;
}

static void
GetCodeResData (const char *ship_id, RESOURCE_DATA *resdata)
{
	BYTE which_res;
	void *hData;

	which_res = atoi (ship_id);
	hData = HMalloc (sizeof (CODERES_STRUCT));
	if (hData)
	{
		RaceDescInitFunc initFunc = CodeResToInitFunc (which_res);
		RACE_DESC *RDPtr = (initFunc == NULL) ? NULL : (*initFunc)();
		if (RDPtr == 0)
		{
			HFree (hData);
			hData = 0;
		}
		else
		{
			CODERES_STRUCT *cs;

			cs = (CODERES_STRUCT *) hData;
			cs->data = *RDPtr;  // Structure assignment.
		}
	}
	resdata->ptr = hData;
}

void
openAL_Uninit (void)
{
	int i;

	UninitStreamDecoder ();

	for (i = 0; i < NUM_SOUNDSOURCES; ++i)
	{
		if (soundSource[i].sample && soundSource[i].sample->decoder)
		{
			StopStream (i);
		}
		if (soundSource[i].sbuffer)
		{
			void *sbuffer = soundSource[i].sbuffer;
			soundSource[i].sbuffer = NULL;
			HFree (sbuffer);
		}
		DestroyMutex (soundSource[i].stream_mutex);
	}

	alcMakeContextCurrent (NULL);
	alcDestroyContext (alcContext);
	alcContext = NULL;
	alcCloseDevice (alcDevice);
	alcDevice = NULL;

	SoundDecoder_Uninit ();
}