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|
// $Id$
// ============================================================================
/**
* @file Proactor_Scatter_Gather_Test.cpp
*
* The test runs on a single thread, and involves a single Sender,
* two Receivers and a single Writer. The Sender async-reads
* (scattered) from a file into chunks of <page size>. It
* async-sends (gathered) the odd chunks to the first receiver over a
* stream, and the even chunks to the second receiver over a
* different stream. The receivers async-read (scattered) from the
* socket streams into chunks in size of <page size>, and convey the
* data to the Writer. The Writer reconstructs the file using
* async-write (gathered). Then, the reconstructed file is compared
* to the original file to determine test success. So, It covers both
* async scatter/gather stream I/O and async scatter/gather file I/O.
* The wire transfer protocol is very naive (and totally non
* reliable...) - when both connections are closed, EOF is assumed.
* The test can be also run in a seperated sender and receiver mode,
* to test real network influences.
*
* This test is based upon some building blocks taken from the
* Proactor_Test.cpp.
*
* @author Edan Ayal <edanayal@yahoo.com> */
// ============================================================================
#include "test_config.h"
#if defined (ACE_HAS_WIN32_OVERLAPPED_IO)
// This currently only works on Win32 platforms (NT SP2 and above).
// Support for Unix platforms supporting POSIX aio calls should be added in future.
#include "ace/Get_Opt.h"
#include "ace/Proactor.h"
#include "ace/Asynch_Acceptor.h"
#include "ace/Asynch_Connector.h"
#include "ace/Mem_Map.h"
#include "ace/Min_Max.h"
#include "ace/OS_NS_math.h"
#include "ace/OS_NS_sys_stat.h"
#include "ace/OS_NS_fcntl.h"
#include "ace/OS_NS_unistd.h"
#include "ace/SOCK_Connector.h"
// For the Acceptor/Connector handlers maintenance lists
static const int SENDERS = 1;
static const int RECEIVERS = 2;
// Port that we're receiving connections on.
static u_short port = ACE_DEFAULT_SERVER_PORT;
static const ACE_TCHAR *host = ACE_LOCALHOST;
// File that we're sending.
static const ACE_TCHAR *input_file = ACE_TEXT("Proactor_Scatter_Gather_Test.cpp");
// Name of the output file.
static const ACE_TCHAR *output_file = ACE_TEXT("output");
static int client_only = 0;
static int server_only = 0;
static size_t chunk_size = 0;
enum
{
ODD = 0,
EVEN
};
// *************************************************************
// Some chunks chain helper routines
// *************************************************************
static int allocate_chunks_chain (ACE_Message_Block *&head_mb,
size_t number_of_chunks)
{
ACE_Message_Block *pre_mb = 0;
for (size_t index = 0; index < number_of_chunks; ++index)
{
#if defined (ACE_WIN32)
void *addr = ::VirtualAlloc (0,
chunk_size,
MEM_COMMIT,
PAGE_READWRITE);
#else
void *addr = new char[chunk_size];
#endif /* ACE_WIN32 */
if (addr)
{
ACE_Message_Block *mb = new ACE_Message_Block (static_cast<char *> (addr),
chunk_size);
if (!head_mb)
head_mb = mb;
// chain them together
if (pre_mb)
pre_mb->cont (mb);
pre_mb = mb;
}
else
{
ACE_TEST_ASSERT (0);
return -1;
}
}
return 0;
}
static void
free_chunks_chain (ACE_Message_Block *&mb)
{
for (const ACE_Message_Block* msg = mb;
msg != 0;
msg = msg->cont ())
{
#if defined (ACE_WIN32)
::VirtualFree (msg->base (),
msg->size (),
MEM_DECOMMIT);
#else
delete [] msg->base ();
#endif /* ACE_WIN32 */
}
mb->release ();
mb = 0;
}
static int
last_chunk (ACE_Message_Block *chain,
ACE_Message_Block *&last)
{
if (!chain)
return 0;
int index = 1;
last = chain;
while (0 != last->cont ())
{
last = last->cont ();
++index;
}
return index;
}
static void
merge_odd_even_chains (ACE_Message_Block *odd_mb,
ACE_Message_Block *even_mb)
{
ACE_Message_Block *pre_pre_mb = odd_mb;
ACE_Message_Block *pre_mb = even_mb;
ACE_Message_Block *curr_mb = odd_mb->cont ();
if (even_mb)
{
for (; curr_mb != 0; curr_mb = pre_pre_mb->cont ())
{
pre_pre_mb->cont (pre_mb);
// increment history pointers
pre_pre_mb = pre_mb;
pre_mb = curr_mb;
}
pre_pre_mb->cont (pre_mb);
pre_mb->cont (0);
}
}
static void
split_odd_even_chains (ACE_Message_Block *odd_mb,
ACE_Message_Block *even_mb)
{
ACE_Message_Block *pre_pre_mb = odd_mb;
ACE_Message_Block *pre_mb = even_mb;
ACE_Message_Block *curr_mb = (even_mb ? even_mb->cont () : 0);
for (; curr_mb != 0; curr_mb = curr_mb->cont ())
{
pre_pre_mb->cont (curr_mb);
// increment history pointers
pre_pre_mb = pre_mb;
pre_mb = curr_mb;
}
pre_pre_mb->cont (0);
if (pre_mb)
pre_mb->cont (0);
}
static void
add_to_chunks_chain (ACE_Message_Block *&chunks_chain,
ACE_Message_Block *additional_chunks_chain)
{
if (0 == chunks_chain)
chunks_chain = additional_chunks_chain;
else
{
ACE_Message_Block *last = 0;
last_chunk (chunks_chain, last);
if (last)
last->cont (additional_chunks_chain);
}
}
static void
remove_empty_chunks (ACE_Message_Block *&chunks_chain)
{
if (0 == chunks_chain)
return;
ACE_Message_Block *first_empty = chunks_chain;
ACE_Message_Block *pre_mb = 0;
while (first_empty->length () > 0 &&
0 != first_empty->cont ())
{
pre_mb = first_empty;
first_empty = first_empty->cont ();
}
// break the chain there, and release the empty end (might be everything)
if (0 == first_empty->length ())
{
if (pre_mb) // might be 0, in case it's the entire chain
pre_mb->cont (0);
if (first_empty == chunks_chain)
chunks_chain = 0;
free_chunks_chain (first_empty);
}
}
// *************************************************************
// Acceptor, Receiver and Writer
// *************************************************************
class Receiver;
class Acceptor : public ACE_Asynch_Acceptor<Receiver>
{
friend class Receiver;
public:
Acceptor (void);
virtual ~Acceptor (void);
void stop (void);
// Virtual from ACE_Asynch_Acceptor
virtual Receiver *make_handler (void);
int get_number_sessions (void) { return this->sessions_; }
private:
void on_new_receiver (Receiver &rcvr);
void on_delete_receiver (Receiver &rcvr);
int sessions_;
Receiver *list_receivers_[RECEIVERS];
};
class Writer;
// The first instantiated take the role of the odd receiver
class Receiver : public ACE_Service_Handler
{
friend class Acceptor;
friend class Writer;
public:
Receiver (Acceptor *acceptor = 0, int index = -1);
virtual ~Receiver (void);
//FUZZ: disable check_for_lack_ACE_OS
/// This is called after the new connection has been accepted.
virtual void open (ACE_HANDLE handle,
ACE_Message_Block &message_block);
//FUZZ: enable check_for_lack_ACE_OS
protected:
/// This is called by the framework when asynchronous <read> operation from the
/// socket completes.
virtual void handle_read_stream (const ACE_Asynch_Read_Stream::Result &result);
private:
int initiate_read_stream (void);
void check_destroy (void);
Acceptor *acceptor_;
int index_;
// Socket input
ACE_Asynch_Read_Stream rs_;
ACE_HANDLE socket_handle_;
// Writer
static Writer* writer_;
long io_count_;
char odd_;
// if we get non-page-size reminder, we will not send it to the writer
// until it is full (unless at end)
ACE_Message_Block *partial_chunk_;
};
class Writer : public ACE_Handler
{
friend class Receiver;
public:
Writer (void);
virtual ~Writer (void);
//FUZZ: disable check_for_lack_ACE_OS
void open (void);
//FUZZ: enable check_for_lack_ACE_OS
// this is *not* a callback from the framework
int handle_read_chunks_chain (ACE_Message_Block *mb,
int type);
// for determining when last receiver dies
void on_new_receiver ();
void on_delete_receiver ();
protected:
/// This is called by the framework when an asynchronous <write> to the file
/// completes.
virtual void handle_write_file (const ACE_Asynch_Write_File::Result &result);
private:
int initiate_write_file (void);
private:
// Output file
ACE_Asynch_Write_File wf_;
ACE_HANDLE output_file_handle_;
u_long writing_file_offset_;
u_long reported_file_offset_;
ACE_Message_Block *odd_chain_;
ACE_Message_Block *even_chain_;
long io_count_;
char receiver_count_;
};
// *************************************************************
// Receiver Impl
// *************************************************************
Writer *Receiver::writer_ = 0;
Receiver::Receiver (Acceptor * acceptor, int index)
: acceptor_ (acceptor),
index_ (index),
socket_handle_ (ACE_INVALID_HANDLE),
io_count_ (0),
partial_chunk_ (0)
{
// the first one is the odd one
this->odd_ = ((0 == index) ? 1 : 0);
if (this->odd_)
{
Receiver::writer_ = new Writer;
if (!Receiver::writer_)
{
ACE_TEST_ASSERT (0);
return;
}
}
Receiver::writer_->on_new_receiver ();
if (this->acceptor_ != 0)
this->acceptor_->on_new_receiver (*this);
}
Receiver::~Receiver (void)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Receiver::~Receiver\n")));
if (this->acceptor_ != 0)
this->acceptor_->on_delete_receiver (*this);
if (this->socket_handle_ != ACE_INVALID_HANDLE)
ACE_OS::closesocket (this->socket_handle_);
Receiver::writer_->on_delete_receiver ();
if (this->partial_chunk_)
{
ACE_TEST_ASSERT (0); // should not be getting here
this->partial_chunk_->release ();
}
}
void
Receiver::check_destroy (void)
{
if (this->io_count_ <= 0)
delete this;
}
void
Receiver::open (ACE_HANDLE handle, ACE_Message_Block &)
{
this->socket_handle_ = handle;
// Open the ACE_Asynch_Read_Stream
if (this->rs_.open (*this, this->socket_handle_) == -1)
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Receiver::ACE_Asynch_Read_Stream::open")));
else
{
if (this->odd_)
Receiver::writer_->open ();
this->initiate_read_stream ();
}
this->check_destroy ();
}
int
Receiver::initiate_read_stream (void)
{
if (!Receiver::writer_)
return -1;
// how many chunks to allocate?
size_t number_of_new_chunks = (this->partial_chunk_ ?
(ACE_IOV_MAX / RECEIVERS) - 1
: ACE_IOV_MAX / RECEIVERS);
// allocate chunks chain
ACE_Message_Block *head_mb = 0;
if (-1 == allocate_chunks_chain (head_mb, number_of_new_chunks))
{
ACE_TEST_ASSERT (0);
return -1;
}
// calculate how many bytes to read
// head_mb could be 0 (no new chunks allocated)
size_t bytes_to_read = head_mb ? head_mb->total_size () : 0;
// add the partial chunk at the front if appropriate, and update
// the number of bytes to read
if (this->partial_chunk_)
{
bytes_to_read += this->partial_chunk_->space ();
this->partial_chunk_->cont (head_mb);
head_mb = this->partial_chunk_;
this->partial_chunk_ = 0;
}
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Receiver::initiate_read_stream - (%s) readv %d\n"),
this->odd_ ? ACE_TEXT ("ODD ") : ACE_TEXT ("EVEN"),
bytes_to_read));
// perform the actual scattered read
if (this->rs_.readv (*head_mb,
bytes_to_read) == -1)
{
free_chunks_chain (head_mb);
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Receiver::ACE_Asynch_Stream::read")),
-1);
}
++this->io_count_;
return 0;
}
void
Receiver::handle_read_stream (const ACE_Asynch_Read_Stream::Result &result)
{
ACE_Message_Block *mb = &result.message_block ();
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Receiver::handle_read_stream - (%s) read %d\n"),
this->odd_ ? ACE_TEXT ("ODD ") : ACE_TEXT ("EVEN"),
result.bytes_transferred ()));
// Transfer only complete chunks to the writer.
// Save last partial chunk for the next call.
// On disconnect (error or 0 transferred), transfer whatever we have.
// at this stage there should not be anything there
ACE_TEST_ASSERT (!this->partial_chunk_);
// first, remove the empty chunks
remove_empty_chunks (mb);
if (mb && Receiver::writer_)
{ // there's something to write, and who to write to
// write everything or only complete chunks?
// write everything - when no new bytes were transferred
int write_everything = 0;
if (!result.bytes_transferred ())
write_everything = 1;
if (write_everything)
Receiver::writer_->handle_read_chunks_chain (mb,
this->odd_ ? ODD : EVEN);
else
{ // filter out the partial chunk at the end (if present)
// and save it for later before writing the full chunks
// have this->partial_chunk_ point to the last chunk in the chain
size_t last_index = last_chunk (mb, this->partial_chunk_);
if (this->partial_chunk_ &&
this->partial_chunk_->length () < chunk_size)
{ // found partial chunk at end of chain
// detach it from the chain
if (last_index > 1) // chain bigger than 1
{
ACE_Message_Block *pre_last = mb;
for (size_t index = 1; index < last_index - 1; ++index)
pre_last = pre_last->cont ();
// detach partial chunk from chain
pre_last->cont (0);
}
else
// chain in length of 1 - so we need to zero mb
mb = 0;
}
else // last is a full chunk, so hand it over with the rest
this->partial_chunk_ = 0;
// transfer (if there's anything left)
if (mb && mb->total_length ())
Receiver::writer_->handle_read_chunks_chain (
mb,
this->odd_ ? ODD : EVEN);
// initiate more reads only if no error
if (!result.error ())
this->initiate_read_stream ();
else
ACE_TEST_ASSERT (0);
}
}
else if (mb && !Receiver::writer_)
// no one to write to
free_chunks_chain (mb);
--this->io_count_;
this->check_destroy ();
}
// *************************************************************
// Acceptor Impl
// *************************************************************
Acceptor::Acceptor (void)
: sessions_ (0)
{
for (int i = 0; i < RECEIVERS; ++i)
this->list_receivers_[i] = 0;
}
Acceptor::~Acceptor (void)
{
this->stop ();
}
void
Acceptor::stop (void)
{
// This method can be called only after proactor event loop is done
// in all threads.
for (int i = 0; i < RECEIVERS; ++i)
{
delete this->list_receivers_[i];
this->list_receivers_[i] = 0;
}
}
void
Acceptor::on_new_receiver (Receiver & rcvr)
{
++this->sessions_;
this->list_receivers_[rcvr.index_] = &rcvr;
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Receiver::CTOR sessions_ = %d\n"),
this->sessions_));
}
void
Acceptor::on_delete_receiver (Receiver & rcvr)
{
--this->sessions_;
if (rcvr.index_ >= 0
&& rcvr.index_ < RECEIVERS
&& this->list_receivers_[rcvr.index_] == &rcvr)
this->list_receivers_[rcvr.index_] = 0;
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Receiver::~DTOR sessions_ = %d\n"),
this->sessions_));
}
Receiver *
Acceptor::make_handler (void)
{
if (this->sessions_ >= RECEIVERS)
return 0;
for (int i = 0; i < RECEIVERS; ++i)
{
if (this->list_receivers_[i] == 0)
{
ACE_NEW_RETURN (this->list_receivers_[i],
Receiver (this, i),
0);
return this->list_receivers_[i];
}
}
return 0;
}
// *************************************************************
// Writer Impl
// *************************************************************
Writer::Writer (void)
: output_file_handle_ (ACE_INVALID_HANDLE),
writing_file_offset_ (0),
reported_file_offset_ (0),
odd_chain_ (0),
even_chain_ (0),
io_count_ (0),
receiver_count_ (0)
{
}
Writer::~Writer (void)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Writer::~Writer\n")));
if (this->output_file_handle_ != ACE_INVALID_HANDLE)
ACE_OS::close (this->output_file_handle_);
Receiver::writer_ = 0;
}
void
Writer::on_new_receiver ()
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Writer::on_new_receiver\n")));
++this->receiver_count_;
}
void
Writer::on_delete_receiver ()
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Writer::on_delete_receiver\n")));
--this->receiver_count_;
if (0 == this->receiver_count_)
{
if (this->io_count_ <= 0)
// no pending io, so do the work oursleves
// (if pending io, they'll see the zero receiver count)
this->initiate_write_file ();
}
}
void
Writer::open (void)
{
// Open the file for output
if (ACE_INVALID_HANDLE == (this->output_file_handle_ = ACE_OS::open (output_file,
O_CREAT | _O_TRUNC | _O_WRONLY |\
FILE_FLAG_OVERLAPPED |\
FILE_FLAG_NO_BUFFERING,
ACE_DEFAULT_FILE_PERMS)))
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Writer::open::ACE_OS::open")));
// Open the ACE_Asynch_Write_File
else if (this->wf_.open (*this, this->output_file_handle_) == -1)
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Writer::open::ACE_Asynch_Write_File::open")));
}
int
Writer::handle_read_chunks_chain (ACE_Message_Block *mb,
int type)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Writer::handle_read_chunks_chain - (%s) %d bytes\n"),
(type == ODD) ? ACE_TEXT ("ODD ") : ACE_TEXT ("EVEN"),
mb->total_length ()));
add_to_chunks_chain (ODD == type ? this->odd_chain_ : this->even_chain_, mb);
this->initiate_write_file ();
return 0;
}
int
Writer::initiate_write_file (void)
{
// find out how much can we merge
ACE_Message_Block *dummy_last = 0;
size_t odd_count = last_chunk (this->odd_chain_, dummy_last);
size_t even_count = last_chunk (this->even_chain_, dummy_last);
size_t merge_size = ACE_MIN (ACE_MIN (odd_count, even_count),
(size_t) ACE_IOV_MAX);
// the options here are as follows:
// io_count_ can be zero or greater.
// merge_size can be zero or not.
// if non zero merge, write the merge. ASSERT receiver_count_ is non zero too.
// if zero merge:
// if receiver_count_ is non zero, NOOP.
// if zero receiver_count_, we should write whatever is left,
// and terminate the writer at completion.
// if nothing to write, and io_count_ is zero too, terminate here.
if (0 == merge_size &&
0 != this->receiver_count_)
return 0;
if (0 == merge_size &&
0 == this->receiver_count_ &&
0 == odd_count &&
0 == even_count &&
0 == this->io_count_)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Writer::initiate_write_file")
ACE_TEXT (" - ending proactor event loop\n")));
ACE_Proactor::instance ()->end_event_loop ();
delete this;
return 0;
}
// if we reached nere and merge_size is zero, we should write whatever is
// in the queues (1 to 2 chunks together), so let's force the merge size to 1.
if (0 == merge_size)
{
ACE_TEST_ASSERT (1 == odd_count && 1 >= even_count);
merge_size = 1;
}
// Now that we found out what we want to do, prepare the chain
// that will be written, and update the remainders
ACE_Message_Block *new_odd_chain_head = this->odd_chain_;
ACE_Message_Block *new_even_chain_head = this->even_chain_;
// locate the place for detachment in the chains
ACE_Message_Block *pre_odd = 0;
ACE_Message_Block *pre_even = 0;
for (size_t index = 0; index < merge_size; ++index)
{
pre_odd = new_odd_chain_head;
if (new_odd_chain_head)
new_odd_chain_head = new_odd_chain_head->cont ();
pre_even = new_even_chain_head;
if (new_even_chain_head)
new_even_chain_head = new_even_chain_head->cont ();
}
// now detach the chain
if (pre_odd)
pre_odd->cont (0);
if (pre_even)
pre_even->cont (0);
// perform merge between the two chains
merge_odd_even_chains (this->odd_chain_, this->even_chain_);
// and now finally perform the write
ACE_Message_Block *united_mb = this->odd_chain_;
// update the remainders of the chains
this->odd_chain_ = new_odd_chain_head;
this->even_chain_ = new_even_chain_head;
size_t increment_writing_file_offset = united_mb->total_length ();
// Reconstruct the file
// Write the size, not the length, because we must write in chunks
// of <page size>
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Writer::initiate_write_file: write %d bytes at %d\n"),
united_mb->total_size (),
this->writing_file_offset_));
if (this->wf_.writev (*united_mb,
united_mb->total_size (),
this->writing_file_offset_) == -1)
{
free_chunks_chain (united_mb);
ACE_ERROR_RETURN((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Writer::initiate_write_file::ACE_Asynch_Write_Stream::writev")),
-1);
}
// we update now because otherwise, we'd have error when performing
// pipelined writing (that is, mulitple calls to write before the callbacks
// to handle_x)
this->writing_file_offset_ +=
static_cast<u_long> (increment_writing_file_offset);
++this->io_count_;
return 0;
}
void
Writer::handle_write_file (const ACE_Asynch_Write_File::Result &result)
{
ACE_Message_Block *mb = &result.message_block ();
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Writer::handle_write_file at offset %d wrote %d\n"),
this->reported_file_offset_,
result.bytes_transferred ()));
this->reported_file_offset_ +=
static_cast<u_long> (result.bytes_transferred ());
// Always truncate as required,
// because partial will always be the last write to a file
ACE_Message_Block *last_mb = mb;
last_chunk (mb, last_mb);
if (last_mb->space ())
ACE_OS::truncate (output_file,
this->reported_file_offset_ -
static_cast<u_long> (last_mb->space ()));
free_chunks_chain (mb);
--this->io_count_;
// end of process?
if (0 == this->receiver_count_ &&
0 == this->io_count_)
{
ACE_TEST_ASSERT (0 == this->odd_chain_ && 0 == this->even_chain_);
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Writer::handle_write_file")
ACE_TEXT (" - ending proactor event loop\n")));
ACE_Proactor::instance ()->end_event_loop ();
delete this;
}
}
// *************************************************************
// Connector and Sender
// *************************************************************
class Sender;
class Connector : public ACE_Asynch_Connector<Sender>
{
friend class Sender;
public:
Connector (void);
virtual ~Connector (void);
// Address to pass to Sender for secondary connect.
void set_address (const ACE_INET_Addr &addr);
const ACE_INET_Addr &get_address (void);
void stop (void);
// Virtual from ACE_Asynch_Connector
virtual Sender *make_handler (void);
private:
void on_new_sender (Sender &rcvr);
void on_delete_sender (Sender &rcvr);
int sessions_;
ACE_INET_Addr addr_;
Sender *list_senders_[SENDERS];
};
class Sender : public ACE_Service_Handler
{
friend class Connector;
public:
Sender (Connector *connector = 0, int index = -1);
virtual ~Sender (void);
//FUZZ: disable check_for_lack_ACE_OS
/// This is called after the new connection has been established.
virtual void open (ACE_HANDLE handle,
ACE_Message_Block &message_block);
//FUZZ: enable check_for_lack_ACE_OS
// This is called by the framework when asynchronous reads from the
// file complete.
virtual void handle_read_file (const ACE_Asynch_Read_File::Result &result);
// This is called by the framework when asynchronous writes from the
// socket complete.
virtual void handle_write_stream (const ACE_Asynch_Write_Stream::Result &result);
private:
void check_destroy (void);
int initiate_read_file (void);
int initiate_write_stream (ACE_Message_Block &mb);
int index_;
Connector * connector_;
// File to read from
ACE_Asynch_Read_File rf_;
ACE_HANDLE input_file_handle_;
u_long file_offset_;
// Sockets to send to
// odd and even socket output streams
ACE_Asynch_Write_Stream ws_[RECEIVERS];
ACE_HANDLE socket_handle_[RECEIVERS];
long io_count_;
};
// *************************************************************
// Connector Impl
// *************************************************************
Connector::Connector (void)
: sessions_ (0)
{
for (int i = 0; i < SENDERS; ++i)
this->list_senders_[i] = 0;
}
Connector::~Connector (void)
{
this->stop ();
}
// Address to pass to Sender for secondary connect.
void
Connector::set_address (const ACE_INET_Addr &addr)
{
this->addr_ = addr;
}
const ACE_INET_Addr &
Connector::get_address (void)
{
return this->addr_;
}
void
Connector::stop (void)
{
// This method can be called only after proactor event loop is done
// in all threads.
for (int i = 0; i < SENDERS; ++i)
{
delete this->list_senders_[i];
this->list_senders_[i] = 0;
}
}
void
Connector::on_new_sender (Sender &sndr)
{
++this->sessions_;
this->list_senders_[sndr.index_] = &sndr;
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Sender::CTOR sessions_ = %d\n"),
this->sessions_));
}
void
Connector::on_delete_sender (Sender &sndr)
{
--this->sessions_;
if (sndr.index_ >= 0
&& sndr.index_ < SENDERS
&& this->list_senders_[sndr.index_] == &sndr)
this->list_senders_[sndr.index_] = 0;
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Sender::~DTOR sessions_ = %d\n"),
this->sessions_));
}
Sender *
Connector::make_handler (void)
{
if (this->sessions_ >= SENDERS)
return 0;
for (int i = 0; i < SENDERS; ++i)
{
if (this->list_senders_ [i] == 0)
{
ACE_NEW_RETURN (this->list_senders_[i],
Sender (this, i),
0);
return this->list_senders_[i];
}
}
return 0;
}
// *************************************************************
// Sender Impl
// *************************************************************
Sender::Sender (Connector * connector, int index)
: index_ (index),
connector_ (connector),
input_file_handle_ (ACE_INVALID_HANDLE),
file_offset_ (0),
io_count_ (0)
{
socket_handle_[ODD] = socket_handle_[EVEN] = ACE_INVALID_HANDLE;
if (this->connector_ != 0)
this->connector_->on_new_sender (*this);
}
Sender::~Sender (void)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Sender::~Sender\n")));
if (this->connector_ != 0)
this->connector_->on_delete_sender (*this);
if (this->socket_handle_[ODD] != ACE_INVALID_HANDLE)
ACE_OS::closesocket (this->socket_handle_[ODD]);
if (this->socket_handle_[EVEN] != ACE_INVALID_HANDLE)
ACE_OS::closesocket (this->socket_handle_[EVEN]);
if (this->input_file_handle_ != ACE_INVALID_HANDLE)
ACE_OS::close (this->input_file_handle_);
if (client_only)
ACE_Proactor::instance ()->end_event_loop ();
}
// return true if we alive, false we commited suicide
void
Sender::check_destroy (void)
{
if (this->io_count_ <= 0)
delete this;
}
void
Sender::open (ACE_HANDLE handle, ACE_Message_Block &)
{
this->socket_handle_[ODD] = handle;
// Open the input file
if (ACE_INVALID_HANDLE == (this->input_file_handle_ =
ACE_OS::open (input_file,
_O_RDONLY |\
FILE_FLAG_OVERLAPPED |\
FILE_FLAG_NO_BUFFERING,
ACE_DEFAULT_FILE_PERMS)))
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Sender::open::ACE_OS::open")));
}
else
{
// Now connect (w/o the connector factory) to the even (=second)
// receiver. We don't connect thru the factory in order not to
// instantiate another Sender.
ACE_SOCK_Connector sock_connector;
ACE_SOCK_Stream sock_stream;
if (-1 == sock_connector.connect (sock_stream,
this->connector_->get_address ()))
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Sender::open::ACE_SOCK_Connector::connect")));
else
{
this->socket_handle_[EVEN] = sock_stream.get_handle ();
// Open odd ACE_Asynch_Write_Stream
if (this->ws_[ODD].open (*this, this->socket_handle_[ODD]) == -1)
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Sender::open::ACE_Asynch_Write_Stream::open")));
// Open even ACE_Asynch_Write_Stream
else if (this->ws_[EVEN].open (*this, this->socket_handle_[EVEN]) == -1)
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Sender::open::ACE_Asynch_Write_Stream::open")));
// Open ACE_Asynch_Read_File
else if (this->rf_.open (*this, this->input_file_handle_) == -1)
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Sender::open::ACE_Asynch_Read_File::open")));
else
// Start an asynchronous read
this->initiate_read_file ();
}
}
this->check_destroy ();
}
int
Sender::initiate_read_file (void)
{
ACE_TEST_ASSERT (0 == this->file_offset_ % chunk_size);
static const size_t file_size = ACE_OS::filesize (input_file);
static const size_t number_of_chunks_needed_for_file =
static_cast<size_t> (ACE_OS::ceil ((double) file_size / chunk_size));
size_t relevant_number_of_chunks =
ACE_MIN ((size_t)ACE_IOV_MAX,
number_of_chunks_needed_for_file
- (size_t)(this->file_offset_ / chunk_size));
if (!relevant_number_of_chunks)
{
ACE_TEST_ASSERT (0); // Just 2 C it coming
return 0;
}
ACE_Message_Block *head_mb = 0;
if (-1 == allocate_chunks_chain (head_mb, relevant_number_of_chunks))
{
ACE_TEST_ASSERT (0);
return -1;
}
// Inititiate read
if (this->rf_.readv (*head_mb,
head_mb->total_size (),
this->file_offset_) == -1)
{
free_chunks_chain (head_mb);
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Sender::initiate_read_file::")
ACE_TEXT ("ACE_Asynch_Read_Stream::readv")),
-1);
}
++this->io_count_;
return 0;
}
int
Sender::initiate_write_stream (ACE_Message_Block &mb)
{
// send the odd to the first connection, and the even to the second
// connection.
ACE_Message_Block *odd_mb = &mb;
ACE_Message_Block *even_mb = mb.cont ();
split_odd_even_chains (odd_mb, even_mb);
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Sender::initiate_write_stream - (ODD ) writev %d\n"),
odd_mb->total_length ()));
if (this->ws_[ODD].writev (*odd_mb, odd_mb->total_length ()) == -1)
{
free_chunks_chain (odd_mb);
if (even_mb)
free_chunks_chain (even_mb);
ACE_ERROR_RETURN((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Sender::ACE_Asynch_Stream::writev")),
-1);
}
++this->io_count_;
if (even_mb)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Sender::initiate_write_stream - (EVEN) writev %d\n"),
even_mb->total_length ()));
if (this->ws_[EVEN].writev (*even_mb, even_mb->total_length ()) == -1)
{
free_chunks_chain (even_mb);
ACE_ERROR_RETURN((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("Sender::ACE_Asynch_Stream::writev")),
-1);
}
++this->io_count_;
}
return 0;
}
void
Sender::handle_read_file (const ACE_Asynch_Read_File::Result &result)
{
ACE_Message_Block *mb = &result.message_block ();
if (result.error () == 0 && result.bytes_transferred () != 0)
{
size_t bytes_transferred = result.bytes_transferred ();
size_t chunks_chain_size = mb->total_size ();
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Sender::handle_read_file, read %d, ")
ACE_TEXT ("chain total %d\n"),
bytes_transferred,
chunks_chain_size));
this->file_offset_ += static_cast<u_long> (bytes_transferred);
this->initiate_write_stream (*mb);
// and read more if required
if (bytes_transferred == chunks_chain_size)
this->initiate_read_file ();
}
else
free_chunks_chain (mb);
--this->io_count_;
this->check_destroy ();
}
void
Sender::handle_write_stream (const ACE_Asynch_Write_Stream::Result &result)
{
ACE_Message_Block *mb = &result.message_block ();
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Sender::handle_write_stream - wrote %d bytes\n"),
result.bytes_transferred ()));
if (result.error () == 0 && result.bytes_transferred () != 0)
// verify sent all
ACE_TEST_ASSERT (0 == mb->total_length ());
else
ACE_TEST_ASSERT (0);
free_chunks_chain (mb);
--this->io_count_;
this->check_destroy ();
}
// *************************************************************
// Configuration helpers
// *************************************************************
int
print_usage (int /* argc */, ACE_TCHAR *argv[])
{
ACE_ERROR
((LM_ERROR,
ACE_TEXT ("\nusage: %s")
ACE_TEXT ("\n-f <input file>\n")
ACE_TEXT ("\n-c client only (reader-sender)")
ACE_TEXT ("\n-s server only (receiver-writer)")
ACE_TEXT ("\n-h host to connect to")
ACE_TEXT ("\n-p port")
ACE_TEXT ("\n-u show this message")
ACE_TEXT ("\n"),
argv[0]
));
return -1;
}
static int
parse_args (int argc, ACE_TCHAR *argv[])
{
if (argc == 1) // no arguments , so one button test
return 0;
ACE_Get_Opt get_opt (argc, argv, ACE_TEXT ("f:csh:p:u"));
int c;
while ((c = get_opt ()) != EOF)
{
switch (c)
{
case 'f':
input_file = get_opt.opt_arg ();
break;
case 'c':
client_only = 1;
server_only = 0;
break;
case 's':
server_only = 1;
client_only = 0;
break;
case 'h':
host = get_opt.opt_arg ();
break;
case 'p':
port = ACE_OS::atoi (get_opt.opt_arg ());
break;
case 'u':
default:
return print_usage (argc, argv);
} // switch
} // while
return 0;
}
int
run_main (int argc, ACE_TCHAR *argv[])
{
ACE_START_TEST (ACE_TEXT ("Proactor_Scatter_Gather_Test"));
if (::parse_args (argc, argv) == -1)
return -1;
chunk_size = ACE_OS::getpagesize ();
if (client_only)
ACE_DEBUG ((LM_INFO,
ACE_TEXT ("Running as client only, page size %d\n"),
chunk_size));
else if (server_only)
ACE_DEBUG ((LM_INFO,
ACE_TEXT ("Running as server only, page size %d\n"),
chunk_size));
else
ACE_DEBUG ((LM_INFO,
ACE_TEXT ("Running as server and client, page size %d\n"),
chunk_size));
Acceptor acceptor;
Connector connector;
ACE_INET_Addr addr (port);
if (!client_only)
{
// Simplify, initial read with zero size
if (-1 == acceptor.open (addr, 0, 1))
{
ACE_TEST_ASSERT (0);
return -1;
}
}
if (!server_only)
{
if (-1 == connector.open (1, ACE_Proactor::instance ()))
{
ACE_TEST_ASSERT (0);
return -1;
}
// connect to first destination
if (addr.set (port, host, 1, addr.get_type ()) == -1)
ACE_ERROR_RETURN ((LM_ERROR, ACE_TEXT ("%p\n"), host), -1);
connector.set_address (addr);
if (-1 == connector.connect (addr))
{
ACE_TEST_ASSERT (0);
return -1;
}
}
ACE_Proactor::instance ()->run_event_loop ();
// As Proactor event loop now is inactive it is safe to destroy all
// senders
connector.stop ();
acceptor.stop ();
ACE_Proactor::instance()->close_singleton ();
// now compare the files - available only when on same machine
int success = 0;
if (!client_only && !server_only)
{
ACE_DEBUG ((LM_INFO,
ACE_TEXT ("Comparing the input file and the output file...\n")));
success = -1;
// map the two files, then perform memcmp
{
ACE_Mem_Map original_file (input_file);
ACE_Mem_Map reconstructed_file (output_file);
if (original_file.addr () &&
original_file.addr () != MAP_FAILED &&
reconstructed_file.addr () &&
reconstructed_file.addr () != MAP_FAILED)
{
// compare lengths
if ((original_file.size () == reconstructed_file.size ()) &&
// and if same size, compare file data
(0 == ACE_OS::memcmp (original_file.addr (),
reconstructed_file.addr (),
original_file.size ())))
success = 0;
}
}
if (0 == success)
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("input file and the output file identical!\n")));
else
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("input file and the output file are different!\n")));
}
if (!client_only)
ACE_OS::unlink (output_file);
ACE_END_TEST;
return success;
}
#else
int
run_main (int, ACE_TCHAR *[])
{
ACE_START_TEST (ACE_TEXT ("Proactor_Scatter_Gather_Test"));
ACE_DEBUG ((LM_INFO,
ACE_TEXT ("Asynchronous Scatter/Gather IO is unsupported.\n")
ACE_TEXT ("Proactor_Scatter_Gather_Test will not be run.\n")));
ACE_END_TEST;
return 0;
}
#endif /* ACE_HAS_WIN32_OVERLAPPED_IO */
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