int8 RingBuffer::read(uint8 *dat)
{
uint32 bufsize = 0;
uint32 tmprp = 0;
if (g_wcounter <= (g_rcounter+1))
{
tmprp = 0;
}
if (checkReadData() < 0)
{
return -1;
}
g_rcounter++;
tmprp = readBuffer(sizeof(bufsize), this->m_rp, (uint8 *)&bufsize);
//没到结尾处，直接取
if (bufsize + this->m_rp < this->m_size)
{
std::string ret = std::string(this->m_buffer[tmprp], bufsize);
dat = (uint8 *)ret.c_str();
tmprp = (tmprp + bufsize) % this->m_size;
}
else
tmprp = readBuffer(bufsize, tmprp, dat);
setReadPoint(tmprp);
return 0;
}
virtual void readDone(unsigned int tag) {
if ( verbose ) {
//printf( "%s received read page buffer: %d %d\n", log_prefix, rbuf, curReadsInFlight );
printf( "LOG: pagedone: tag=%d; inflight=%d\n", tag, curReadsInFlight );
fflush(stdout);
}
//check
checkReadData(tag);
pthread_mutex_lock(&flashReqMutex);
curReadsInFlight --;
if ( curReadsInFlight < 0 ) {
fprintf(stderr, "LOG: **ERROR: Read requests in flight cannot be negative %d\n", curReadsInFlight );
curReadsInFlight = 0;
}
if ( readTagTable[tag].busy == false ) {
fprintf(stderr, "LOG: **ERROR: received unused buffer read done %d\n", tag);
testPass = 0;
}
readTagTable[tag].busy = false;
//pthread_cond_broadcast(&flashFreeTagCond);
pthread_mutex_unlock(&flashReqMutex);
}
virtual void readDone(unsigned int tag, unsigned int status) {
bool tempPassed = true;
printf("LOG: readdone: tag=%d inflight=%d\n", tag, curReadsInFlight );
fflush(stdout);
//check
tempPassed = checkReadData(tag);
pthread_mutex_lock(&flashReqMutex);
curReadsInFlight --;
if ( tempPassed == false ) {
testPassed = false;
printf("LOG: **ERROR: check read data failed @ tag=%d\n",tag);
}
if ( curReadsInFlight < 0 ) {
fprintf(stderr, "LOG: **ERROR: Read requests in flight cannot be negative %d\n", curReadsInFlight );
curReadsInFlight = 0;
}
if ( readTagTable[tag].busy == false ) {
fprintf(stderr, "LOG: **ERROR: received unused buffer read done %d\n", tag);
testPassed = false;
}
readTagTable[tag].busy = false;
pthread_mutex_unlock(&flashReqMutex);
}
