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// -*- C++ -*-
#include "tao/Synch_Queued_Message.h"
#include "tao/debug.h"
#include "tao/ORB_Core.h"
#include "ace/Malloc_T.h"
#include "ace/Message_Block.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
TAO_Synch_Queued_Message::TAO_Synch_Queued_Message (
const ACE_Message_Block *contents,
TAO_ORB_Core *oc,
ACE_Allocator *alloc,
bool is_heap_allocated)
: TAO_Queued_Message (oc, alloc, is_heap_allocated)
, contents_ (const_cast<ACE_Message_Block*> (contents))
, current_block_ (contents_)
, own_contents_ (is_heap_allocated)
{
}
TAO_Synch_Queued_Message::~TAO_Synch_Queued_Message ()
{
if (this->own_contents_ && this->contents_ != nullptr)
{
ACE_Message_Block::release (this->contents_);
}
}
const ACE_Message_Block *
TAO_Synch_Queued_Message::current_block () const
{
return this->current_block_;
}
size_t
TAO_Synch_Queued_Message::message_length () const
{
if (this->current_block_ == nullptr)
{
return 0;
}
return this->current_block_->total_length ();
}
int
TAO_Synch_Queued_Message::all_data_sent () const
{
return this->current_block_ == nullptr;
}
void
TAO_Synch_Queued_Message::fill_iov (int iovcnt_max,
int &iovcnt,
iovec iov[]) const
{
ACE_ASSERT (iovcnt_max > iovcnt);
for (const ACE_Message_Block *message_block = this->current_block_;
message_block != nullptr && iovcnt < iovcnt_max;
message_block = message_block->cont ())
{
size_t const message_block_length = message_block->length ();
// Check if this block has any data to be sent.
if (message_block_length > 0)
{
// Collect the data in the iovec.
iov[iovcnt].iov_base = message_block->rd_ptr ();
iov[iovcnt].iov_len = static_cast<u_long> (message_block_length);
// Increment iovec counter.
++iovcnt;
}
}
}
void
TAO_Synch_Queued_Message::bytes_transferred (size_t &byte_count)
{
this->state_changed_i (TAO_LF_Event::LFS_ACTIVE);
while (this->current_block_ != nullptr && byte_count > 0)
{
size_t const l = this->current_block_->length ();
if (byte_count < l)
{
this->current_block_->rd_ptr (byte_count);
byte_count = 0;
return;
}
byte_count -= l;
this->current_block_->rd_ptr (l);
this->current_block_ = this->current_block_->cont ();
while (this->current_block_ != nullptr
&& this->current_block_->length () == 0)
{
this->current_block_ = this->current_block_->cont ();
}
}
if (this->current_block_ == nullptr)
this->state_changed (TAO_LF_Event::LFS_SUCCESS,
this->orb_core_->leader_follower ());
}
TAO_Queued_Message *
TAO_Synch_Queued_Message::clone (ACE_Allocator *alloc)
{
TAO_Synch_Queued_Message *qm = nullptr;
// Clone the message block.
// NOTE: We wantedly do the cloning from <current_block_> instead of
// starting from <contents_> since we dont want to clone blocks that
// have already been sent on the wire. Waste of memory and
// associated copying.
ACE_Message_Block *mb = this->current_block_->clone ();
if (alloc)
{
ACE_NEW_MALLOC_RETURN (qm,
static_cast<TAO_Synch_Queued_Message *> (
alloc->malloc (sizeof (TAO_Synch_Queued_Message))),
TAO_Synch_Queued_Message (mb,
this->orb_core_,
alloc,
true),
nullptr);
}
else
{
ACE_NEW_RETURN (qm,
TAO_Synch_Queued_Message (mb, this->orb_core_, nullptr, true),
nullptr);
}
return qm;
}
void
TAO_Synch_Queued_Message::destroy ()
{
if (this->own_contents_)
{
ACE_Message_Block::release (this->contents_);
this->current_block_ = nullptr;
this->contents_ = nullptr;
}
if (this->is_heap_created_)
{
// If we have an allocator release the memory to the allocator
// pool.
if (this->allocator_)
{
ACE_DES_FREE_THIS (this->allocator_->free,
TAO_Synch_Queued_Message);
}
else // global release..
{
delete this;
}
}
}
void
TAO_Synch_Queued_Message::copy_if_necessary (const ACE_Message_Block* chain)
{
if (!this->own_contents_)
{
// Go through the message block chain looking for the message block
// that matches our "current" message block.
for (const ACE_Message_Block* mb = chain; mb != nullptr; mb = mb->cont ())
{
if (mb == this->current_block_)
{
// Once we have found the message block, we need to
// clone the current block so that if another thread comes
// in and calls reset() on the output stream (via another
// invocation on the transport), it doesn't cause the rest
// of our message to be released.
this->own_contents_ = true;
this->contents_ = this->current_block_->clone ();
this->current_block_ = this->contents_;
break;
}
}
}
}
TAO_END_VERSIONED_NAMESPACE_DECL
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