70 lines
1.3 KiB
C
70 lines
1.3 KiB
C
/*++
|
|
|
|
Copyright (c) 1997 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
BUFMGR.H
|
|
|
|
Abstract:
|
|
|
|
Buffer Descriptor and Memory Manager for ARPD
|
|
|
|
Author:
|
|
|
|
Aaron Ogus (aarono)
|
|
|
|
Environment:
|
|
|
|
Win32/COM
|
|
|
|
Revision History:
|
|
|
|
Date Author Description
|
|
======= ====== ============================================================
|
|
1/13/97 aarono Original
|
|
|
|
--*/
|
|
|
|
#ifndef _BUFMGR_H_
|
|
#define _BUFMGR_H_
|
|
|
|
#include "buffer.h"
|
|
#include "bufpool.h"
|
|
|
|
typedef struct _DoubleBuffer{
|
|
union {
|
|
BUFFER Buffer;
|
|
struct {
|
|
struct _DoubleBuffer *pNext;
|
|
PVOID PAD;
|
|
PCHAR pData;
|
|
UINT len; // length of data area used
|
|
DWORD dwFlags; // Packet flags, ownership and type of packet.
|
|
};
|
|
};
|
|
UINT totlen; // total length of data area
|
|
UINT tLastUsed; // last tick count this was used
|
|
CHAR data[1]; // variable length data
|
|
} DOUBLEBUFFER, *PDOUBLEBUFFER;
|
|
|
|
|
|
VOID InitBufferManager(VOID);
|
|
VOID FiniBuffermanager(VOID);
|
|
|
|
PBUFFER GetDoubleBufferAndCopy(PMEMDESC, UINT);
|
|
VOID FreeDoubleBuffer(PBUFFER);
|
|
PBUFFER BuildBufferChain(PMEMDESC, UINT);
|
|
|
|
VOID FreeBufferChainAndMemory(PBUFFER); //works for either type
|
|
UINT BufferChainTotalSize(PBUFFER);
|
|
|
|
#define GBF_ALLOC_MEM 0x00000001
|
|
|
|
// Don't pool more than 64K per channel.
|
|
#define MAX_CHANNEL_DATA 65536
|
|
// Don't hold more than 3 free buffers per channel.
|
|
#define MAX_CHANNEL_BUFFERS 3
|
|
|
|
#endif
|