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#include "ace/FILE_Addr.h"
#include "ace/Auto_Ptr.h"
#include "ace/Truncate.h"
#include "Options.h"
#include "Mem_Map_Stream.h"
ACE_SOCK_Stream &
Mem_Map_Stream::stream (void)
{
return svc_handler_->peer ();
}
ssize_t
Mem_Map_Stream::send_n (const void *buf, size_t size, ACE_Time_Value *tv)
{
return svc_handler_->peer ().send_n (buf, size, 0, tv);
}
int
Mem_Map_Stream::eof (void) const
{
return this->get_pos_ >= this->end_of_mapping_plus1_;
}
int
Mem_Map_Stream::get_char (void)
{
if (this->eof () && this->grow_file_and_remap () == -1)
return EOF;
return *this->get_pos_++;
}
int
Mem_Map_Stream::rewind (void)
{
this->recv_pos_ =
reinterpret_cast<char *> (this->mem_map_.addr ());
this->get_pos_ = this->recv_pos_;
this->end_of_mapping_plus1_ =
this->recv_pos_ + this->mem_map_.size ();
return 0;
}
int
Mem_Map_Stream::peek_char (size_t offset)
{
// We may need to iterate if the size of <n> is large.
while (this->get_pos_ + offset >= this->end_of_mapping_plus1_)
if (this->grow_file_and_remap () == -1)
return EOF;
return this->get_pos_[offset];
}
const char *
Mem_Map_Stream::recv (void) const
{
return this->recv_pos_;
}
const char *
Mem_Map_Stream::recv (size_t &len)
{
if (this->eof () && this->grow_file_and_remap () == -1)
return 0;
const char *s = this->recv_pos_;
ACE_OFF_T olen = static_cast <ACE_OFF_T> (len);
this->seek (olen, SEEK_CUR);
len = this->get_pos_ - s;
return s;
}
size_t
Mem_Map_Stream::recv_len (void) const
{
return this->get_pos_ - this->recv_pos_;
}
const char *
Mem_Map_Stream::peek_str (size_t offset,
size_t size)
{
// We will iterate if the size of <offset> is large.
while (this->get_pos_ + (offset + size) > this->end_of_mapping_plus1_)
if (this->grow_file_and_remap () == -1)
return 0;
return &this->get_pos_[offset];
}
ACE_OFF_T
Mem_Map_Stream::seek (ACE_OFF_T offset, int whence)
{
switch (whence)
{
case SEEK_SET:
this->get_pos_ =
reinterpret_cast<char *> (this->mem_map_.addr ())
+ offset;
break;
case SEEK_CUR:
this->get_pos_ += offset;
break;
case SEEK_END:
this->get_pos_ =
this->end_of_mapping_plus1_ + offset;
// @@ Not sure how to implement this (yet).
ACE_NOTSUP_RETURN (-1);
}
// Make sure that the backing store will cover this.
while (this->get_pos_ > this->end_of_mapping_plus1_)
if (this->grow_file_and_remap () == -1)
return (ACE_OFF_T) -1;
this->recv_pos_ = this->get_pos_;
return
ACE_Utils::truncate_cast<ACE_OFF_T> (
this->recv_pos_ - reinterpret_cast<char *> (this->mem_map_.addr ()));
}
Mem_Map_Stream::Svc_Handler *
Mem_Map_Stream::svc_handler (void)
{
return this->svc_handler_;
}
int
Mem_Map_Stream::open (STRAT_CONNECTOR *connector,
const ACE_INET_Addr &addr)
{
svc_handler_ = 0;
// Connect to the server at <addr>. If the handler has to be
// connected to the server again, the Caching strategy takes care
// and uses the same connection.
if (connector->connect (svc_handler_,
addr) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"%p %s %d\n",
"Connect failed",
addr.get_host_name (),
addr.get_port_number ()),
-1);
}
// Create a temporary filename.
ACE_FILE_Addr file (ACE_sap_any_cast (ACE_FILE_Addr &));
// Create the temporary file via the <ACE_Mem_Map> class API.
if (this->mem_map_.open (file.get_path_name (),
O_RDWR | O_CREAT | O_APPEND,
ACE_DEFAULT_FILE_PERMS) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"open"),
-1);
// Make sure to unlink this right away so that if this process
// crashes these files will be removed automatically.
#if 0
else if (ACE_OS::unlink (file.get_path_name ()) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"unlink"),
-1);
else
#endif
// Initialize all the position pointers to 0.
this->rewind ();
return 0;
}
int
Mem_Map_Stream::grow_file_and_remap (void)
{
char buf[BUFSIZ + 1];
// Copy the next chunk of bytes from the socket into the temporary
// file.
ACE_Time_Value tv (*OPTIONS::instance ()->timeout ());
ssize_t n = this->svc_handler_->peer ().recv_n (buf,
sizeof buf,
0,
&tv);
if (n == -1)
{
if (OPTIONS::instance ()->debug ())
ACE_ERROR ((LM_ERROR,
"%p\n",
"recv"));
return -1;
}
else if (n == 0)
return -1;
else if (ACE::write_n (this->mem_map_.handle (), buf, n) != n)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"write_n"),
-1);
// Grow the memory-mapping to encompass the entire temporary file.
if (this->mem_map_.map (static_cast<size_t> (-1),
PROT_RDWR,
ACE_MAP_PRIVATE | ACE_MAP_FIXED,
ACE_DEFAULT_BASE_ADDR) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"map"),
-1);
// MAP_FAILED is used as a "first time in" flag.
if (this->recv_pos_ == MAP_FAILED)
{
this->recv_pos_ = reinterpret_cast<char *> (this->mem_map_.addr ());
this->get_pos_ = this->recv_pos_;
}
this->end_of_mapping_plus1_ =
reinterpret_cast<char *> (this->mem_map_.addr ())
+ this->mem_map_.size ();
return 0;
}
Mem_Map_Stream::~Mem_Map_Stream (void)
{
// Remove the mapping and the file.
this->mem_map_.remove ();
}
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