static jint
doAttach(SharedMemoryTransport *transport)
{
transport->shared->attachingPID = sysProcessGetID();
CHECK_ERROR(sysEventSignal(transport->attachEvent));
CHECK_ERROR(sysEventWait(NULL, transport->acceptEvent));
return SYS_OK;
}
/*
* Enter/exit with stream mutex held.
* On error, does not hold the stream mutex.
*/
static jint
waitForData(SharedMemoryConnection *connection, Stream *stream)
{
jint error = SYS_OK;
/* Assumes mutex is held on call */
while ((error == SYS_OK) && EMPTY(stream)) {
CHECK_ERROR(leaveMutex(stream));
error = sysEventWait(connection->otherProcess, stream->hasData);
if (error == SYS_OK) {
CHECK_ERROR(enterMutex(stream, connection->shutdown));
}
}
return error;
}
/*
* Enter/exit with stream mutex held.
* On error, does not hold the stream mutex.
*/
static jint
waitForSpace(SharedMemoryConnection *connection, Stream *stream)
{
jint error = SYS_OK;
/* Assumes mutex is held on call */
while ((error == SYS_OK) && FULL(stream)) {
CHECK_ERROR(leaveMutex(stream));
error = sysEventWait(connection->otherProcess, stream->hasSpace, 0);
if (error == SYS_OK) {
CHECK_ERROR(enterMutex(stream, connection->shutdown));
} else {
setLastError(error);
}
}
return error;
}
jint
shmemBase_accept(SharedMemoryTransport *transport,
long timeout,
SharedMemoryConnection **connectionPtr)
{
jint error;
SharedMemoryConnection *connection;
clearLastError();
CHECK_ERROR(sysEventWait(NULL, transport->attachEvent, timeout));
error = createConnection(transport, transport->shared->attachingPID,
&connection);
if (error != SYS_OK) {
/*
* Reject the attacher
*/
transport->shared->isAccepted = JNI_FALSE;
sysEventSignal(transport->acceptEvent);
freeConnection(connection);
return error;
}
transport->shared->isAccepted = JNI_TRUE;
error = sysEventSignal(transport->acceptEvent);
if (error != SYS_OK) {
/*
* No real point trying to reject it.
*/
closeConnection(connection);
return error;
}
*connectionPtr = connection;
return SYS_OK;
}
