CT_INT_TYPE CConn_Streambuf::underflow(void)
{
_ASSERT(gptr() >= egptr());
if (!m_Conn)
return CT_EOF;
// flush output buffer, if tied up to it
if (m_Tie && x_sync() != 0)
return CT_EOF;
#ifdef NCBI_COMPILER_MIPSPRO
if (m_MIPSPRO_ReadsomeGptrSetLevel && m_MIPSPRO_ReadsomeGptr != gptr())
return CT_EOF;
m_MIPSPRO_ReadsomeGptr = (CT_CHAR_TYPE*)(-1L);
#endif /*NCBI_COMPILER_MIPSPRO*/
// read from connection
size_t n_read;
m_Status = CONN_Read(m_Conn, m_ReadBuf, m_BufSize,
&n_read, eIO_ReadPlain);
_ASSERT(n_read <= m_BufSize);
if (!n_read) {
_ASSERT(m_Status != eIO_Success);
if (m_Status != eIO_Closed)
ERR_POST_X(8, x_Message("underflow(): CONN_Read() failed"));
return CT_EOF;
}
// update input buffer with the data just read
x_GPos += (CT_OFF_TYPE) n_read;
setg(m_ReadBuf, m_ReadBuf, m_ReadBuf + n_read);
return CT_TO_INT_TYPE(*m_ReadBuf);
}
void sync_speed_test(int connection_key)
{
x_endpoint_handle_t endpoint = x_get_endpoint(connection_key);
int i, j;
for (i = 0; i < 10000; i++) {
for (j = 0; j < 1000; j++) {
x_sync(endpoint);
x_sync(endpoint);
x_sync(endpoint);
x_sync(endpoint);
x_sync(endpoint);
x_sync(endpoint);
x_sync(endpoint);
x_sync(endpoint);
x_sync(endpoint);
x_sync(endpoint);
}
x_task_heartbeat();
}
}
void sync_test (int connection_key)
{
x_endpoint_handle_t endpoint = x_get_endpoint(connection_key);
if (connection_key == X_TO_LEFT) {
x_sleep(6);
x_set_task_status ("First sync to left %x",endpoint);
x_sync(endpoint);
x_set_task_status ("First sync done");
x_sleep(3);
x_set_task_status ("Second sync to left");
x_sync(endpoint);
x_set_task_status ("Second sync done");
}
else if (connection_key == X_FROM_RIGHT) {
x_sleep(3);
x_set_task_status ("First sync from right %x",endpoint);
x_sync(endpoint);
x_set_task_status ("First sync done");
x_sleep(6);
x_set_task_status ("Second from right");
x_sync(endpoint);
x_set_task_status ("Second sync done");
}
}
/* Output "page" */
static int
x_output_page(gx_device * dev, int num_copies, int flush)
{
gx_device_X *xdev = (gx_device_X *) dev;
x_sync(dev);
/* Send ghostview a "page" client event */
/* Wait for a "next" client event */
if (xdev->ghostview) {
XEvent event;
gdev_x_send_event(xdev, xdev->PAGE);
XNextEvent(xdev->dpy, &event);
while (event.type != ClientMessage ||
event.xclient.message_type != xdev->NEXT) {
XNextEvent(xdev->dpy, &event);
}
}
return gx_finish_output_page(dev, num_copies, flush);
}
CRWStreambuf::~CRWStreambuf()
{
try {
// Flush only if data pending and no error
if (!x_Err || x_ErrPos != x_GetPPos())
x_sync();
setg(0, 0, 0);
setp(0, 0);
IReaderWriter* rw = dynamic_cast<IReaderWriter*> (m_Reader);
if (rw && rw == dynamic_cast<IReaderWriter*> (m_Writer)) {
if ((m_Flags & fOwnAll) == fOwnAll)
delete rw;
} else {
if (m_Flags & fOwnWriter)
delete m_Writer;
if (m_Flags & fOwnReader)
delete m_Reader;
}
delete[] m_pBuf;
} NCBI_CATCH_ALL_X(2, "Exception in ~CRWStreambuf() [IGNORED]");
}
streamsize CConn_Streambuf::showmanyc(void)
{
static const STimeout kZeroTmo = {0, 0};
_ASSERT(gptr() >= egptr());
if (!m_Conn)
return -1L;
// flush output buffer, if tied up to it
if (m_Tie)
x_sync();
const STimeout* tmo;
const STimeout* timeout = CONN_GetTimeout(m_Conn, eIO_Read);
if (timeout == kDefaultTimeout) {
// HACK * HACK * HACK
tmo = ((SMetaConnector*) m_Conn)->default_timeout;
} else
tmo = timeout;
size_t x_read;
bool backup = false;
if (m_BufSize > 1) {
if (eback() < gptr()) {
x_Buf = gptr()[-1];
backup = true;
}
if (!tmo)
_VERIFY(CONN_SetTimeout(m_Conn, eIO_Read, &kZeroTmo)==eIO_Success);
m_Status = CONN_Read(m_Conn, m_ReadBuf + 1, m_BufSize - 1,
&x_read, eIO_ReadPlain);
if (!tmo)
_VERIFY(CONN_SetTimeout(m_Conn, eIO_Read, timeout) ==eIO_Success);
_ASSERT(x_read > 0 || m_Status != eIO_Success);
} else {
m_Status = CONN_Wait(m_Conn, eIO_Read, tmo ? tmo : &kZeroTmo);
x_read = 0;
}
if (!x_read) {
switch (m_Status) {
case eIO_Success:
_ASSERT(m_BufSize <= 1);
return 1L; // can read at least 1 byte
case eIO_Timeout:
if (!tmo || !(tmo->sec | tmo->usec))
break;
/*FALLTHRU*/
case eIO_Closed:
return -1L; // EOF
default:
break;
}
return 0; // no data available immediately
}
m_ReadBuf[0] = x_Buf;
_ASSERT(m_BufSize > 1);
setg(m_ReadBuf + !backup, m_ReadBuf + 1, m_ReadBuf + 1 + x_read);
x_GPos += x_read;
return x_read;
}
streamsize CConn_Streambuf::xsgetn(CT_CHAR_TYPE* buf, streamsize m)
{
if (!m_Conn)
return 0;
// flush output buffer, if tied up to it
if (m_Tie && x_sync() != 0)
return 0;
if (m < 0)
return 0;
_ASSERT((Uint8) m < numeric_limits<size_t>::max());
size_t n = (size_t) m;
size_t n_read;
if (n) {
// first, read from the memory buffer
n_read = (size_t)(egptr() - gptr());
if (n_read > n)
n_read = n;
memcpy(buf, gptr(), n_read);
gbump(int(n_read));
n -= n_read;
if (!n)
return (streamsize) n_read;
buf += n_read;
} else
n_read = 0;
do {
// next, read from the connection
size_t x_toread = n && n < m_BufSize ? m_BufSize : n;
CT_CHAR_TYPE* x_buf = n < m_BufSize ? m_ReadBuf : buf;
size_t x_read;
m_Status = CONN_Read(m_Conn, x_buf, x_toread,
&x_read, eIO_ReadPlain);
_ASSERT(x_read <= x_toread);
if (!x_read) {
_ASSERT(!x_toread || m_Status != eIO_Success);
if (m_Status != eIO_Success && m_Status != eIO_Closed)
ERR_POST_X(10, x_Message("xsgetn(): CONN_Read() failed"));
break;
}
x_GPos += (CT_OFF_TYPE) x_read;
// satisfy "usual backup condition", see standard: 27.5.2.4.3.13
if (x_buf == m_ReadBuf) {
size_t xx_read = x_read;
if (x_read > n)
x_read = n;
memcpy(buf, m_ReadBuf, x_read);
setg(m_ReadBuf, m_ReadBuf + x_read, m_ReadBuf + xx_read);
} else {
_ASSERT(x_read <= n);
size_t xx_read = x_read > m_BufSize ? m_BufSize : x_read;
memcpy(m_ReadBuf, buf + x_read - xx_read, xx_read);
setg(m_ReadBuf, m_ReadBuf + xx_read, m_ReadBuf + xx_read);
}
n_read += x_read;
if (m_Status != eIO_Success)
break;
buf += x_read;
n -= x_read;
} while (n);
return (streamsize) n_read;
}