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BOOST_NO_EXCEPTIONS support added.

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[SVN r14835]
This commit is contained in:
Peter Dimov
2002-08-14 12:27:22 +00:00
parent e650c7ff16
commit a09c2e556f
4 changed files with 73 additions and 23 deletions
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44
include/boost/detail/shared_array_nmt.hpp
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@@ -17,11 +17,13 @@
#include <boost/assert.hpp>
#include <boost/checked_delete.hpp>
#include <boost/throw_exception.hpp>
#include <boost/detail/atomic_count.hpp>
#include <cstddef> // for std::ptrdiff_t
#include <algorithm> // for std::swap
#include <functional> // for std::less
#include <cstddef> // for std::ptrdiff_t
#include <algorithm> // for std::swap
#include <functional> // for std::less
#include <new> // for std::bad_alloc
namespace boost
{
@@ -38,22 +40,36 @@ public:
explicit shared_array(T * p = 0): px(p)
{
#ifndef BOOST_NO_EXCEPTIONS
try // prevent leak if new throws
{
pn = new count_type(1);
}
catch(...)
{
checked_array_delete(p);
boost::checked_array_delete(p);
throw;
}
}
#else
pn = new count_type(1);
if(pn == 0)
{
boost::checked_array_delete(p);
boost::throw_exception(std::bad_alloc());
}
#endif
}
~shared_array()
{
if(--*pn == 0)
{
checked_array_delete(px);
boost::checked_array_delete(px);
delete pn;
}
}
@@ -63,19 +79,19 @@ public:
pn = r.pn;
++*pn;
}
shared_array & operator=(shared_array const & r)
{
shared_array(r).swap(*this);
return *this;
}
void reset(T * p = 0)
{
BOOST_ASSERT(p == 0 || p != px);
shared_array(p).swap(*this);
}
T * get() const // never throws
{
return px;
@@ -87,7 +103,7 @@ public:
BOOST_ASSERT(i >= 0);
return px[i];
}
long use_count() const // never throws
{
return *pn;
@@ -97,15 +113,15 @@ public:
{
return *pn == 1;
}
void swap(shared_array<T> & other) // never throws
{
std::swap(px, other.px);
std::swap(pn, other.pn);
}
private:
T * px; // contained pointer
count_type * pn; // ptr to reference counter