int write (const char* sourceBuffer, int numBytesToWrite, int timeOutMilliseconds)
{
int bytesWritten = -1;
const uint32 timeoutEnd = getTimeoutEnd (timeOutMilliseconds);
if (pipeOut == -1)
{
pipeOut = openPipe (createdPipe ? pipeOutName : pipeInName, O_WRONLY, timeoutEnd);
if (pipeOut == -1)
return -1;
}
bytesWritten = 0;
while (bytesWritten < numBytesToWrite && ! hasExpired (timeoutEnd))
{
const int bytesThisTime = numBytesToWrite - bytesWritten;
const int numWritten = (int) ::write (pipeOut, sourceBuffer, bytesThisTime);
if (numWritten <= 0)
{
bytesWritten = -1;
break;
}
bytesWritten += numWritten;
sourceBuffer += numWritten;
}
return bytesWritten;
}
int write (const char* sourceBuffer, int numBytesToWrite, int timeOutMilliseconds)
{
const uint32 timeoutEnd = getTimeoutEnd (timeOutMilliseconds);
if (pipeOut == -1)
{
//bob: added O_NONBLOCK to prevent deadlocks when no client is connected for reading before we kill the PIPE
pipeOut = openPipe (createdPipe ? pipeOutName : pipeInName, O_WRONLY|O_NONBLOCK, timeoutEnd);
if (pipeOut == -1)
return -1;
}
int bytesWritten = 0;
while (bytesWritten < numBytesToWrite && ! hasExpired (timeoutEnd))
{
const int bytesThisTime = numBytesToWrite - bytesWritten;
const int numWritten = (int) ::write (pipeOut, sourceBuffer, (size_t) bytesThisTime);
if (numWritten <= 0)
return -1;
bytesWritten += numWritten;
sourceBuffer += numWritten;
}
return bytesWritten;
}
int read (char* destBuffer, int maxBytesToRead, int timeOutMilliseconds)
{
int bytesRead = -1;
blocked = true;
const uint32 timeoutEnd = getTimeoutEnd (timeOutMilliseconds);
if (pipeIn == -1)
{
pipeIn = openPipe (createdPipe ? pipeInName : pipeOutName, O_RDWR | O_NONBLOCK, timeoutEnd);
if (pipeIn == -1)
{
blocked = false;
return -1;
}
}
bytesRead = 0;
while (bytesRead < maxBytesToRead)
{
const int bytesThisTime = maxBytesToRead - bytesRead;
const int numRead = (int) ::read (pipeIn, destBuffer, bytesThisTime);
if (numRead <= 0)
{
if (errno != EWOULDBLOCK || stopReadOperation || hasExpired (timeoutEnd))
{
bytesRead = -1;
break;
}
const int maxWaitingTime = 30;
waitForInput (pipeIn, timeoutEnd == 0 ? maxWaitingTime
: jmin (maxWaitingTime,
(int) (timeoutEnd - Time::getMillisecondCounter())));
continue;
}
bytesRead += numRead;
destBuffer += numRead;
}
blocked = false;
return bytesRead;
}
