/*
* Constructs a _Tt_arg where the mode and type are known.
* No valid data is yet known.
*
*/
_Tt_arg::
_Tt_arg(Tt_mode m, _Tt_string &t)
{
constructor_common();
_mode = m;
_type = t;
}
_Tt_arg::
_Tt_arg(const char *t)
{
_Tt_string ts(t);
constructor_common();
_type = ts;
}
/*
* Constructs a _Tt_arg where the mode and type are known.
* No valid data is yet known.
*
*/
_Tt_arg::
_Tt_arg(Tt_mode m, const char *t)
{
_Tt_string ts(t);
constructor_common();
_mode = m;
_type = ts;
}
FileDescriptor::FileDescriptor (const std::string& fname,
bool sync_)
throw (gu::Exception)
: value (open (fname.c_str(), OPEN_FLAGS, S_IRUSR | S_IWUSR)),
name (fname),
size (lseek (value, 0, SEEK_END)),
sync (sync_)
{
constructor_common();
}
FileDescriptor::FileDescriptor (const std::string& fname,
size_t length,
bool allocate,
bool sync_)
throw (gu::Exception)
: value (open (fname.c_str(), CREATE_FLAGS, S_IRUSR | S_IWUSR)),
name (fname),
size (length),
sync (sync_)
{
constructor_common();
off_t const current_size(lseek (value, 0, SEEK_END));
if (current_size < size)
{
if (allocate)
{
// reserve space that hasn't been reserved
prealloc (current_size);
}
else
{
write_byte (size - 1); // reserve size
}
}
else if (current_size > size)
{
log_info << "Truncating '" << name << "' to " << size << " bytes.";
if (ftruncate(value, size))
{
gu_throw_error(errno) << "Failed to truncate '" << name
<< "' to " << size << " bytes.";
}
}
else
{
log_info << "Reusing existing '" << name << "'.";
}
}
RingBuffer::RingBuffer (const std::string& name, ssize_t size,
std::map<int64_t, const void*> & seqno2ptr)
:
fd_ (name, check_size(size)),
mmap_ (fd_),
open_ (true),
preamble_ (static_cast<char*>(mmap_.ptr)),
header_ (reinterpret_cast<int64_t*>(preamble_ + PREAMBLE_LEN)),
start_ (reinterpret_cast<uint8_t*>(header_ + HEADER_LEN)),
end_ (reinterpret_cast<uint8_t*>(preamble_ + mmap_.size)),
first_ (start_),
next_ (first_),
size_cache_(end_ - start_ - sizeof(BufferHeader)),
size_free_ (size_cache_),
size_used_ (0),
size_trail_(0),
// mallocs_ (0),
// reallocs_ (0),
seqno2ptr_ (seqno2ptr)
{
constructor_common ();
BH_clear (BH_cast(next_));
}
_Tt_arg::
_Tt_arg(const _Tt_string &t)
{
constructor_common();
_type = t;
}
/*
* Construct a _Tt_arg with everything zeroed out
*/
_Tt_arg::
_Tt_arg()
{
constructor_common();
}
