mirror of https://github.com/hak5/openwrt.git
348 lines
12 KiB
C
348 lines
12 KiB
C
/******************************************************************************/
|
|
/* */
|
|
/* Broadcom BCM5700 Linux Network Driver, Copyright (c) 2000 - 2004 Broadcom */
|
|
/* Corporation. */
|
|
/* All rights reserved. */
|
|
/* */
|
|
/* This program is free software; you can redistribute it and/or modify */
|
|
/* it under the terms of the GNU General Public License as published by */
|
|
/* the Free Software Foundation, located in the file LICENSE. */
|
|
/* */
|
|
/* Queue functions. */
|
|
/* void QQ_InitQueue(PQQ_CONTAINER pQueue) */
|
|
/* char QQ_Full(PQQ_CONTAINER pQueue) */
|
|
/* char QQ_Empty(PQQ_CONTAINER pQueue) */
|
|
/* unsigned int QQ_GetSize(PQQ_CONTAINER pQueue) */
|
|
/* unsigned int QQ_GetEntryCnt(PQQ_CONTAINER pQueue) */
|
|
/* char QQ_PushHead(PQQ_CONTAINER pQueue, PQQ_ENTRY pEntry) */
|
|
/* char QQ_PushTail(PQQ_CONTAINER pQueue, PQQ_ENTRY pEntry) */
|
|
/* PQQ_ENTRY QQ_PopHead(PQQ_CONTAINER pQueue) */
|
|
/* PQQ_ENTRY QQ_PopTail(PQQ_CONTAINER pQueue) */
|
|
/* PQQ_ENTRY QQ_GetHead(PQQ_CONTAINER pQueue, unsigned int Idx) */
|
|
/* PQQ_ENTRY QQ_GetTail(PQQ_CONTAINER pQueue, unsigned int Idx) */
|
|
/* */
|
|
/* */
|
|
/* History: */
|
|
/* 02/25/00 Hav Khauv Initial version. */
|
|
/******************************************************************************/
|
|
|
|
#ifndef BCM_QUEUE_H
|
|
#define BCM_QUEUE_H
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Queue definitions. */
|
|
/******************************************************************************/
|
|
|
|
/* Entry for queueing. */
|
|
typedef void *PQQ_ENTRY;
|
|
|
|
|
|
/* Queue header -- base type. */
|
|
typedef struct {
|
|
unsigned int Head;
|
|
unsigned int Tail;
|
|
unsigned int Size;
|
|
MM_ATOMIC_T EntryCnt;
|
|
PQQ_ENTRY Array[1];
|
|
} QQ_CONTAINER, *PQQ_CONTAINER;
|
|
|
|
|
|
/* Declare queue type macro. */
|
|
#define DECLARE_QUEUE_TYPE(_QUEUE_TYPE, _QUEUE_SIZE) \
|
|
\
|
|
typedef struct { \
|
|
QQ_CONTAINER Container; \
|
|
PQQ_ENTRY EntryBuffer[_QUEUE_SIZE]; \
|
|
} _QUEUE_TYPE, *P##_QUEUE_TYPE
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Compilation switches. */
|
|
/******************************************************************************/
|
|
|
|
#if DBG
|
|
#undef QQ_NO_OVERFLOW_CHECK
|
|
#undef QQ_NO_UNDERFLOW_CHECK
|
|
#endif /* DBG */
|
|
|
|
#ifdef QQ_USE_MACROS
|
|
/* notdone */
|
|
#else
|
|
|
|
#ifdef QQ_NO_INLINE
|
|
#define __inline
|
|
#endif /* QQ_NO_INLINE */
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Description: */
|
|
/* */
|
|
/* Return: */
|
|
/******************************************************************************/
|
|
__inline static void
|
|
QQ_InitQueue(
|
|
PQQ_CONTAINER pQueue,
|
|
unsigned int QueueSize) {
|
|
pQueue->Head = 0;
|
|
pQueue->Tail = 0;
|
|
pQueue->Size = QueueSize+1;
|
|
MM_ATOMIC_SET(&pQueue->EntryCnt, 0);
|
|
} /* QQ_InitQueue */
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Description: */
|
|
/* */
|
|
/* Return: */
|
|
/******************************************************************************/
|
|
__inline static char
|
|
QQ_Full(
|
|
PQQ_CONTAINER pQueue) {
|
|
unsigned int NewHead;
|
|
|
|
NewHead = (pQueue->Head + 1) % pQueue->Size;
|
|
|
|
return(NewHead == pQueue->Tail);
|
|
} /* QQ_Full */
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Description: */
|
|
/* */
|
|
/* Return: */
|
|
/******************************************************************************/
|
|
__inline static char
|
|
QQ_Empty(
|
|
PQQ_CONTAINER pQueue) {
|
|
return(pQueue->Head == pQueue->Tail);
|
|
} /* QQ_Empty */
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Description: */
|
|
/* */
|
|
/* Return: */
|
|
/******************************************************************************/
|
|
__inline static unsigned int
|
|
QQ_GetSize(
|
|
PQQ_CONTAINER pQueue) {
|
|
return pQueue->Size;
|
|
} /* QQ_GetSize */
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Description: */
|
|
/* */
|
|
/* Return: */
|
|
/******************************************************************************/
|
|
__inline static unsigned int
|
|
QQ_GetEntryCnt(
|
|
PQQ_CONTAINER pQueue) {
|
|
return MM_ATOMIC_READ(&pQueue->EntryCnt);
|
|
} /* QQ_GetEntryCnt */
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Description: */
|
|
/* */
|
|
/* Return: */
|
|
/* TRUE entry was added successfully. */
|
|
/* FALSE queue is full. */
|
|
/******************************************************************************/
|
|
__inline static char
|
|
QQ_PushHead(
|
|
PQQ_CONTAINER pQueue,
|
|
PQQ_ENTRY pEntry) {
|
|
unsigned int Head;
|
|
|
|
Head = (pQueue->Head + 1) % pQueue->Size;
|
|
|
|
#if !defined(QQ_NO_OVERFLOW_CHECK)
|
|
if(Head == pQueue->Tail) {
|
|
return 0;
|
|
} /* if */
|
|
#endif /* QQ_NO_OVERFLOW_CHECK */
|
|
|
|
pQueue->Array[pQueue->Head] = pEntry;
|
|
MM_WMB();
|
|
pQueue->Head = Head;
|
|
MM_ATOMIC_INC(&pQueue->EntryCnt);
|
|
|
|
return -1;
|
|
} /* QQ_PushHead */
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Description: */
|
|
/* */
|
|
/* Return: */
|
|
/* TRUE entry was added successfully. */
|
|
/* FALSE queue is full. */
|
|
/******************************************************************************/
|
|
__inline static char
|
|
QQ_PushTail(
|
|
PQQ_CONTAINER pQueue,
|
|
PQQ_ENTRY pEntry) {
|
|
unsigned int Tail;
|
|
|
|
Tail = pQueue->Tail;
|
|
if(Tail == 0) {
|
|
Tail = pQueue->Size;
|
|
} /* if */
|
|
Tail--;
|
|
|
|
#if !defined(QQ_NO_OVERFLOW_CHECK)
|
|
if(Tail == pQueue->Head) {
|
|
return 0;
|
|
} /* if */
|
|
#endif /* QQ_NO_OVERFLOW_CHECK */
|
|
|
|
pQueue->Array[Tail] = pEntry;
|
|
MM_WMB();
|
|
pQueue->Tail = Tail;
|
|
MM_ATOMIC_INC(&pQueue->EntryCnt);
|
|
|
|
return -1;
|
|
} /* QQ_PushTail */
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Description: */
|
|
/* */
|
|
/* Return: */
|
|
/******************************************************************************/
|
|
__inline static PQQ_ENTRY
|
|
QQ_PopHead(
|
|
PQQ_CONTAINER pQueue) {
|
|
unsigned int Head;
|
|
unsigned int Tail;
|
|
PQQ_ENTRY Entry;
|
|
|
|
Head = pQueue->Head;
|
|
Tail = pQueue->Tail;
|
|
|
|
MM_MB();
|
|
#if !defined(QQ_NO_UNDERFLOW_CHECK)
|
|
if(Head == Tail) {
|
|
return (PQQ_ENTRY) 0;
|
|
} /* if */
|
|
#endif /* QQ_NO_UNDERFLOW_CHECK */
|
|
|
|
if(Head == 0) {
|
|
Head = pQueue->Size;
|
|
} /* if */
|
|
Head--;
|
|
|
|
Entry = pQueue->Array[Head];
|
|
MM_MB();
|
|
pQueue->Head = Head;
|
|
MM_ATOMIC_DEC(&pQueue->EntryCnt);
|
|
|
|
return Entry;
|
|
} /* QQ_PopHead */
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Description: */
|
|
/* */
|
|
/* Return: */
|
|
/******************************************************************************/
|
|
__inline static PQQ_ENTRY
|
|
QQ_PopTail(
|
|
PQQ_CONTAINER pQueue) {
|
|
unsigned int Head;
|
|
unsigned int Tail;
|
|
PQQ_ENTRY Entry;
|
|
|
|
Head = pQueue->Head;
|
|
Tail = pQueue->Tail;
|
|
|
|
MM_MB();
|
|
#if !defined(QQ_NO_UNDERFLOW_CHECK)
|
|
if(Tail == Head) {
|
|
return (PQQ_ENTRY) 0;
|
|
} /* if */
|
|
#endif /* QQ_NO_UNDERFLOW_CHECK */
|
|
|
|
Entry = pQueue->Array[Tail];
|
|
MM_MB();
|
|
pQueue->Tail = (Tail + 1) % pQueue->Size;
|
|
MM_ATOMIC_DEC(&pQueue->EntryCnt);
|
|
|
|
return Entry;
|
|
} /* QQ_PopTail */
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Description: */
|
|
/* */
|
|
/* Return: */
|
|
/******************************************************************************/
|
|
__inline static PQQ_ENTRY
|
|
QQ_GetHead(
|
|
PQQ_CONTAINER pQueue,
|
|
unsigned int Idx)
|
|
{
|
|
if(Idx >= (unsigned int) MM_ATOMIC_READ(&pQueue->EntryCnt))
|
|
{
|
|
return (PQQ_ENTRY) 0;
|
|
}
|
|
|
|
if(pQueue->Head > Idx)
|
|
{
|
|
Idx = pQueue->Head - Idx;
|
|
}
|
|
else
|
|
{
|
|
Idx = pQueue->Size - (Idx - pQueue->Head);
|
|
}
|
|
Idx--;
|
|
|
|
return pQueue->Array[Idx];
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/* Description: */
|
|
/* */
|
|
/* Return: */
|
|
/******************************************************************************/
|
|
__inline static PQQ_ENTRY
|
|
QQ_GetTail(
|
|
PQQ_CONTAINER pQueue,
|
|
unsigned int Idx)
|
|
{
|
|
if(Idx >= (unsigned int) MM_ATOMIC_READ(&pQueue->EntryCnt))
|
|
{
|
|
return (PQQ_ENTRY) 0;
|
|
}
|
|
|
|
Idx += pQueue->Tail;
|
|
if(Idx >= pQueue->Size)
|
|
{
|
|
Idx = Idx - pQueue->Size;
|
|
}
|
|
|
|
return pQueue->Array[Idx];
|
|
}
|
|
|
|
#endif /* QQ_USE_MACROS */
|
|
|
|
|
|
|
|
#endif /* QUEUE_H */
|