int bbcp_File::Read_Vector(bbcp_BuffPool *iBP, bbcp_BuffPool *oBP, int vNum)
{
bbcp_Buffer *ioBuff[IOV_MAX];
struct iovec ioVec [IOV_MAX];
ssize_t blen, rlen;
int rdsz = iBP->DataSize(), numV = (vNum > IOV_MAX ? IOV_MAX : vNum);
int i, ivN, eof = 0;
// Initialize transfer rate limiting if so desired
//
if (bbcp_Config.Xrate) Read_Wait(rdsz*numV);
// Simply read one buffer at a time, that's the fastest way to do this
//
// cerr <<"VECTOR READ SIZE=" <<rdsz <<" v=" <<numV <<endl;
while(!eof)
{
// Obtain buffers
//
for (ivN = 0; ivN < numV && bytesLeft > 0; ivN++)
{if (!(ioBuff[ivN] = iBP->getEmptyBuff())) return -ENOBUFS;
ioVec[ivN].iov_base = (caddr_t)(ioBuff[ivN]->data);
ioVec[ivN].iov_len = (rdsz < bytesLeft ? rdsz : bytesLeft);
bytesLeft -= rdsz;
}
// Read data into the buffer
//
if ((rlen = IOB->Read((const struct iovec *)&ioVec, ivN)) <= 0)
{for (i = 0; i < ivN; i++) iBP->putEmptyBuff(ioBuff[i]);
eof = !rlen; break;
}
// Queue a filled buffers for further processing
//
for (i = 0; i < ivN && rlen; i++)
{blen = (rlen >= rdsz ? rdsz : rlen);
ioBuff[i]->boff = nextoffset; nextoffset += blen;
ioBuff[i]->blen = blen; rlen -= blen;
oBP->putFullBuff(ioBuff[i]);
}
// Return any empty buffers
//
eof = i < ivN || bytesLeft <= 0;
while(i < ivN) iBP->putEmptyBuff(ioBuff[i++]);
// Limit Transfer rate if need be
//
if (PaceTime && !eof) Read_Wait();
}
// All done
//
if (!eof) return (rlen ? static_cast<int>(rlen) : -ENODATA);
return 0;
}
int bbcp_File::Read_Normal(bbcp_BuffPool* iBP, bbcp_BuffPool* oBP)
{
bbcp_Buffer* bP;
ssize_t rlen;
int rdsz = iBP->DataSize();
// Initialize transfer rate limiting if so desired
//
if (bbcp_Config.Xrate)
Read_Wait(rdsz);
// Simply read one buffer at a time, that's the fastest way to do this
//
// cerr <<"NORMAL READ SIZE=" <<rdsz <<endl;
do
{
// Do real-time copy if need be
//
if (rtCopy && (bytesLeft = bbcp_RTCopy.Prep(nextoffset, rdsz, rlen)) <= 0)
break;
// Obtain buffer
//
if (!(bP = iBP->getEmptyBuff()))
return -ENOBUFS;
// Read data into the buffer
//
if ((rlen = IOB->Read(bP->data, rdsz)) <= 0)
{
iBP->putEmptyBuff(bP);
break;
}
// Queue a filled buffer for further processing
//
bytesLeft -= rlen;
bP->boff = nextoffset;
nextoffset += rlen;
bP->blen = rlen;
oBP->putFullBuff(bP);
// Limit Transfer rate if need be
//
if (PaceTime && rlen == rdsz && bytesLeft > 0)
Read_Wait();
} while (rlen == rdsz && bytesLeft > 0);
// All done
//
if (bytesLeft)
return (rlen ? static_cast<int>(rlen) : -ENODATA);
return 0;
}
int bbcp_File::Read_Direct(bbcp_BuffPool *iBP, bbcp_BuffPool *oBP)
{
bbcp_Buffer *bP;
ssize_t rlen;
int Trunc = 0, rdsz = iBP->DataSize();
// Initialize transfer rate limiting if so desired
//
if (bbcp_Config.Xrate) Read_Wait(rdsz);
// Simply read one buffer at a time, that's the fastest way to do this
//
// cerr <<"DIRECT READ SIZE=" <<rdsz <<endl;
while(bytesLeft > 0)
{
// Obtain buffer
//
if (!(bP = iBP->getEmptyBuff())) return -ENOBUFS;
// Check if we are reading the last segment. Inflate it to the block
// size value (we have room in the buffer) and indicate trunc() needed.
// Otherwise, do a normal full-sized read.
//
if (bytesLeft < rdsz)
{rdsz = bytesLeft + (blockSize - 1) & ~(blockSize - 1);
if ((rlen = IOB->Read(bP->data, rdsz)) < bytesLeft)
{iBP->putEmptyBuff(bP); break;}
Trunc = 1; rlen = bytesLeft;
} else {
if ((rlen = IOB->Read(bP->data, rdsz)) <= 0)
{iBP->putEmptyBuff(bP); break;}
}
// Queue a filled buffer for further processing
//
bytesLeft -= rlen;
bP->boff = nextoffset; nextoffset += rlen;
bP->blen = rlen;
oBP->putFullBuff(bP);
// Limit Transfer rate if need be
//
if (PaceTime && bytesLeft > 0) Read_Wait();
}
// All done
//
if (bytesLeft) return (rlen ? static_cast<int>(rlen) : -ENODATA);
return 0;
}
int bbcp_File::Read_Pipe(bbcp_BuffPool* iBP, bbcp_BuffPool* oBP)
{
bbcp_Buffer* bP;
ssize_t rlen;
int rdsz = iBP->DataSize();
// Initialize transfer rate limiting if so desired
//
if (bbcp_Config.Xrate)
Read_Wait(rdsz);
// Simply read one buffer at a time, that's the fastest way to do this
//
// cerr <<"PIPE READ SIZE=" <<rdsz <<endl;
do
{
// Obtain buffer
//
if (!(bP = iBP->getEmptyBuff()))
return -ENOBUFS;
// Read data into the buffer
//
if ((rlen = IOB->Read(bP->data, rdsz)) <= 0)
{
iBP->putEmptyBuff(bP);
break;
}
// Queue a filled buffer for further processing
//
bP->boff = nextoffset;
nextoffset += rlen;
bP->blen = rlen;
oBP->putFullBuff(bP);
// Limit Transfer rate if need be
//
if (PaceTime && rlen == rdsz)
Read_Wait();
} while (rlen == rdsz);
// All done
//
return 0;
}