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// Handle_Set.cpp
// $Id$
#define ACE_BUILD_DLL
#include "ace/Handle_Set.h"
#if !defined (__ACE_INLINE__)
#include "ace/Handle_Set.i"
#endif /* __ACE_INLINE__ */
ACE_ALLOC_HOOK_DEFINE(ACE_Handle_Set)
void
ACE_Handle_Set::dump (void) const
{
ACE_TRACE ("ACE_Handle_Set::dump");
ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
ACE_DEBUG ((LM_DEBUG, "[ "));
ACE_DEBUG ((LM_DEBUG, "size_ = %d", this->size_));
ACE_DEBUG ((LM_DEBUG, "\nmax_handle_ = %d", this->max_handle_));
#if defined (ACE_WIN32)
for (size_t i = 0; i < this->mask_.fd_count + 1; i++)
ACE_DEBUG ((LM_DEBUG, " %x ", this->mask_.fd_array[i]));
#else /* !ACE_WIN32 */
for (ACE_HANDLE i = 0; i < this->max_handle_ + 1; i++)
if (this->is_set (i))
ACE_DEBUG ((LM_DEBUG, " %d ", i));
#endif /* ACE_WIN32 */
ACE_DEBUG ((LM_DEBUG, " ]"));
ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
}
#if defined (ACE_HAS_BROKEN_BITSHIFT)
static const ACE_UINT32 MSB_MASK = ~(ACE_UINT32 (1) << ACE_UINT32 (NFDBITS - 1));
#else
// This needs to go here to avoid overflow problems on some compilers.
static const ACE_UINT32 MSB_MASK = ~(1 << (NFDBITS - 1));
#endif /* ACE_HAS_BROKEN_BITSHIFT */
// Table that maps bytes to counts of the enabled bits.
const char ACE_Handle_Set::nbits_[256] =
{
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8,
};
// Constructor, initializes the bitmask to all 0s.
ACE_Handle_Set::ACE_Handle_Set (void)
{
ACE_TRACE ("ACE_Handle_Set::ACE_Handle_Set");
this->reset ();
}
ACE_Handle_Set::ACE_Handle_Set (const ACE_FD_SET_TYPE &fd_mask)
{
ACE_TRACE ("ACE_Handle_Set::ACE_Handle_Set");
this->reset ();
ACE_OS::memcpy ((void *) &this->mask_, (void *) &fd_mask, sizeof
this->mask_);
#if !defined(ACE_WIN32)
this->sync (ACE_Handle_Set::MAXSIZE);
#endif /* !ACE_WIN32 */
}
// Counts the number of bits enabled in N. Uses a table lookup to
// speed up the count.
int
ACE_Handle_Set::count_bits (unsigned long n) const
{
ACE_TRACE ("ACE_Handle_Set::count_bits");
return (ACE_Handle_Set::nbits_[n & 0xff] + ACE_Handle_Set::nbits_[(n >> 8) & 0xff] +
ACE_Handle_Set::nbits_[(n >> 16) & 0xff] + ACE_Handle_Set::nbits_[n >> 24]);
}
// Synchronize the underlying FD_SET with the MAX_FD and the SIZE.
void
ACE_Handle_Set::sync (ACE_HANDLE max)
{
ACE_TRACE ("ACE_Handle_Set::sync");
#if !defined(ACE_WIN32)
this->size_ = 0;
for (int i = (max - 1) / ACE_Handle_Set::WORDSIZE; i >= 0; i--)
this->size_ += count_bits (this->mask_.fds_bits[i]);
this->set_max (max);
#else
ACE_UNUSED_ARG(max);
#endif /* !ACE_WIN32 */
}
// Resets the MAX_FD after a clear of the original MAX_FD.
void
ACE_Handle_Set::set_max (ACE_HANDLE current_max)
{
ACE_TRACE ("ACE_Handle_Set::set_max");
#if !defined(ACE_WIN32)
if (this->size_ == 0)
this->max_handle_ = -1;
else
{
int i;
for (i = (current_max - 1) / ACE_Handle_Set::WORDSIZE;
this->mask_.fds_bits[i] == 0;
i--)
continue;
this->max_handle_ = i * ACE_Handle_Set::WORDSIZE;
for (fd_mask val = this->mask_.fds_bits[i];
(val & ~1) != 0;
val = (val >> 1) & MSB_MASK)
this->max_handle_++;
}
// Do some sanity checking...
if (this->max_handle_ >= ACE_Handle_Set::MAXSIZE)
this->max_handle_ = ACE_Handle_Set::MAXSIZE - 1;
#else
ACE_UNUSED_ARG(current_max);
#endif /* !ACE_WIN32 */
}
ACE_ALLOC_HOOK_DEFINE(ACE_Handle_Set_Iterator)
void
ACE_Handle_Set_Iterator::dump (void) const
{
ACE_TRACE ("ACE_Handle_Set_Iterator::dump");
ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
ACE_DEBUG ((LM_DEBUG, "num_ = %d", this->num_));
ACE_DEBUG ((LM_DEBUG, "\nindex_ = %d", this->index_));
ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
}
void
ACE_Handle_Set_Iterator::operator++ (void)
{
ACE_TRACE ("ACE_Handle_Set_Iterator::operator++");
#if defined(ACE_WIN32)
this->index_++;
#else /* !ACE_WIN32 */
this->val_ = (this->val_ >> 1) & MSB_MASK;
this->num_++;
if (this->val_ == 0)
{
for (this->index_++;
this->index_ < ACE_Handle_Set::NUM_WORDS
&& this->handles_.mask_.fds_bits[this->index_] == 0;
this->index_++)
continue;
if (this->index_ >= ACE_Handle_Set::NUM_WORDS)
{
this->num_ = this->handles_.max_handle_ + 1;
return;
}
else
{
this->val_ = this->handles_.mask_.fds_bits[this->index_];
this->num_ = this->index_ * ACE_Handle_Set::WORDSIZE;
}
}
for (; ACE_BIT_DISABLED (this->val_, 1); this->num_++)
this->val_ = (this->val_ >> 1) & MSB_MASK;
#endif /* !ACE_WIN32 */
}
ACE_Handle_Set_Iterator::ACE_Handle_Set_Iterator (const ACE_Handle_Set &f)
: handles_ (f),
num_ (0),
index_ (0)
{
ACE_TRACE ("ACE_Handle_Set_Iterator::ACE_Handle_Set_Iterator");
#if !defined(ACE_WIN32)
for (;
this->handles_.mask_.fds_bits[this->index_] == 0;
this->index_++)
this->num_ += ACE_Handle_Set::WORDSIZE;
for (this->val_ = this->handles_.mask_.fds_bits[this->index_];
(ACE_BIT_DISABLED (this->val_, 1)) && this->num_ < ACE_Handle_Set::MAXSIZE;
this->num_++)
this->val_ = (this->val_ >> 1) & MSB_MASK;
#endif /* !ACE_WIN32 */
}
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