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-rw-r--r--boost/pool/pool.hpp38
1 files changed, 26 insertions, 12 deletions
diff --git a/boost/pool/pool.hpp b/boost/pool/pool.hpp
index c47b11f..8fb1878 100644
--- a/boost/pool/pool.hpp
+++ b/boost/pool/pool.hpp
@@ -355,6 +355,15 @@ class pool: protected simple_segregated_storage < typename UserAllocator::size_t
return s;
}
+ size_type max_chunks() const
+ { //! Calculated maximum number of memory chunks that can be allocated in a single call by this Pool.
+ size_type partition_size = alloc_size();
+ size_type POD_size = math::static_lcm<sizeof(size_type), sizeof(void *)>::value + sizeof(size_type);
+ size_type max_chunks = (std::numeric_limits<size_type>::max() - POD_size) / alloc_size();
+
+ return max_chunks;
+ }
+
static void * & nextof(void * const ptr)
{ //! \returns Pointer dereferenced.
//! (Provided and used for the sake of code readability :)
@@ -375,6 +384,8 @@ class pool: protected simple_segregated_storage < typename UserAllocator::size_t
//! the first time that object needs to allocate system memory.
//! The default is 32. This parameter may not be 0.
//! \param nmax_size is the maximum number of chunks to allocate in one block.
+ set_next_size(nnext_size);
+ set_max_size(nmax_size);
}
~pool()
@@ -398,8 +409,8 @@ class pool: protected simple_segregated_storage < typename UserAllocator::size_t
}
void set_next_size(const size_type nnext_size)
{ //! Set number of chunks to request from the system the next time that object needs to allocate system memory. This value should never be set to 0.
- //! \returns nnext_size.
- next_size = start_size = nnext_size;
+ BOOST_USING_STD_MIN();
+ next_size = start_size = min BOOST_PREVENT_MACRO_SUBSTITUTION(nnext_size, max_chunks());
}
size_type get_max_size() const
{ //! \returns max_size.
@@ -407,7 +418,8 @@ class pool: protected simple_segregated_storage < typename UserAllocator::size_t
}
void set_max_size(const size_type nmax_size)
{ //! Set max_size.
- max_size = nmax_size;
+ BOOST_USING_STD_MIN();
+ max_size = min BOOST_PREVENT_MACRO_SUBSTITUTION(nmax_size, max_chunks());
}
size_type get_requested_size() const
{ //! \returns the requested size passed into the constructor.
@@ -708,9 +720,9 @@ void * pool<UserAllocator>::malloc_need_resize()
BOOST_USING_STD_MIN();
if(!max_size)
- next_size <<= 1;
- else if( next_size*partition_size/requested_size < max_size)
- next_size = min BOOST_PREVENT_MACRO_SUBSTITUTION(next_size << 1, max_size*requested_size/ partition_size);
+ set_next_size(next_size << 1);
+ else if(next_size < max_size * requested_size / partition_size)
+ set_next_size(min BOOST_PREVENT_MACRO_SUBSTITUTION(next_size << 1, max_size * requested_size / partition_size));
// initialize it,
store().add_block(node.begin(), node.element_size(), partition_size);
@@ -748,9 +760,9 @@ void * pool<UserAllocator>::ordered_malloc_need_resize()
BOOST_USING_STD_MIN();
if(!max_size)
- next_size <<= 1;
- else if( next_size*partition_size/requested_size < max_size)
- next_size = min BOOST_PREVENT_MACRO_SUBSTITUTION(next_size << 1, max_size*requested_size/ partition_size);
+ set_next_size(next_size << 1);
+ else if(next_size < max_size * requested_size / partition_size)
+ set_next_size(min BOOST_PREVENT_MACRO_SUBSTITUTION(next_size << 1, max_size * requested_size / partition_size));
// initialize it,
// (we can use "add_block" here because we know that
@@ -792,6 +804,8 @@ void * pool<UserAllocator>::ordered_malloc(const size_type n)
{ //! Gets address of a chunk n, allocating new memory if not already available.
//! \returns Address of chunk n if allocated ok.
//! \returns 0 if not enough memory for n chunks.
+ if (n > max_chunks())
+ return 0;
const size_type partition_size = alloc_size();
const size_type total_req_size = n * requested_size;
@@ -840,9 +854,9 @@ void * pool<UserAllocator>::ordered_malloc(const size_type n)
BOOST_USING_STD_MIN();
if(!max_size)
- next_size <<= 1;
- else if( next_size*partition_size/requested_size < max_size)
- next_size = min BOOST_PREVENT_MACRO_SUBSTITUTION(next_size << 1, max_size*requested_size/ partition_size);
+ set_next_size(next_size << 1);
+ else if(next_size < max_size * requested_size / partition_size)
+ set_next_size(min BOOST_PREVENT_MACRO_SUBSTITUTION(next_size << 1, max_size * requested_size / partition_size));
// insert it into the list,
// handle border case.