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Buffer config fixes from Arkady. 

git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@863 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman 2004-04-10 22:48:26 +00:00
parent 6ad8b415dd
commit ca11edc6fd
1 changed files with 35 additions and 33 deletions
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68
kernel/config.c
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@ -908,12 +908,8 @@ STATIC void Config_Buffers(BYTE * pLine)
COUNT nBuffers;
/* Get the argument */
if (GetNumArg(pLine, &nBuffers) == (BYTE *) 0)
return;
/* Got the value, assign either default or new value */
Config.cfgBuffers =
(nBuffers < 0 ? nBuffers : max(Config.cfgBuffers, nBuffers));
if (GetNumArg(pLine, &nBuffers))
Config.cfgBuffers = nBuffers;
}
/**
@ -1697,43 +1693,45 @@ STATIC COUNT strcasecmp(REG BYTE * d, REG BYTE * s)
that saves some relocation problems
*/
STATIC void config_init_buffers(int anzBuffers)
STATIC void config_init_buffers(int wantedbuffers)
{
REG WORD i;
struct buffer FAR *pbuffer;
unsigned wantedbuffers = anzBuffers;
unsigned buffers = 0;
if (anzBuffers < 0)
{
wantedbuffers = anzBuffers = -anzBuffers;
}
/* fill HMA with buffers if BUFFERS count >=0 and DOS in HMA */
if (wantedbuffers < 0)
wantedbuffers = -wantedbuffers;
else if (HMAState == HMA_DONE)
{
anzBuffers = (0xfff0 - HMAFree) / sizeof(struct buffer);
}
buffers = (0xfff0 - HMAFree) / sizeof(struct buffer);
anzBuffers = max(anzBuffers, 6);
if (anzBuffers > 99)
if (wantedbuffers < 6) /* min 6 buffers */
wantedbuffers = 6;
if (wantedbuffers > 99) /* max 99 buffers */
{
printf("BUFFERS=%u not supported, reducing to 99\n", anzBuffers);
anzBuffers = 99;
printf("BUFFERS=%u not supported, reducing to 99\n", wantedbuffers);
wantedbuffers = 99;
}
LoL->nbuffers = anzBuffers;
if (wantedbuffers > buffers) /* more specified than available -> get em */
buffers = wantedbuffers;
LoL->nbuffers = buffers;
LoL->inforecptr = &LoL->firstbuf;
{
size_t bytes = sizeof(struct buffer) * anzBuffers;
size_t bytes = sizeof(struct buffer) * buffers;
pbuffer = HMAalloc(bytes);
if (pbuffer == NULL)
{
pbuffer = KernelAlloc(bytes, 'B', 0);
if (HMAState == HMA_DONE)
firstAvailableBuf = MK_FP(0xffff, HMAFree);
}
else
{
LoL->bufloc = LOC_HMA;
LoL->deblock_buf = KernelAlloc(SEC_SIZE, 'B', 0);
/* space in HMA beyond requested buffers available as user space */
firstAvailableBuf = pbuffer + wantedbuffers;
}
}
@ -1742,18 +1740,19 @@ STATIC void config_init_buffers(int anzBuffers)
DebugPrintf(("init_buffers (size %u) at", sizeof(struct buffer)));
DebugPrintf((" (%p)", LoL->firstbuf));
pbuffer->b_prev = FP_OFF(pbuffer + (anzBuffers-1));
for (i = 1; i < anzBuffers; ++i)
buffers--;
pbuffer->b_prev = FP_OFF(pbuffer + buffers);
{
if (i == wantedbuffers)
int i = buffers;
do
{
firstAvailableBuf = pbuffer;
}
pbuffer->b_next = FP_OFF(pbuffer + 1);
pbuffer++;
pbuffer->b_prev = FP_OFF(pbuffer - 1);
pbuffer->b_next = FP_OFF(pbuffer + 1);
pbuffer++;
pbuffer->b_prev = FP_OFF(pbuffer - 1);
}
while (--i);
}
pbuffer->b_next = FP_OFF(pbuffer - (anzBuffers-1));
pbuffer->b_next = FP_OFF(pbuffer - buffers);
/* now, we can have quite some buffers in HMA
-- up to 50 for KE38616.
@ -1764,8 +1763,11 @@ STATIC void config_init_buffers(int anzBuffers)
DebugPrintf((" done\n"));
if (FP_SEG(pbuffer) == 0xffff)
{
buffers++;
printf("Kernel: allocated %d Diskbuffers = %u Bytes in HMA\n",
anzBuffers, anzBuffers * sizeof(struct buffer));
buffers, buffers * sizeof(struct buffer));
}
}
STATIC void config_init_fnodes(int f_nodes_cnt)