boostorg/container
1
0
Fork 1
mirror of https://github.com/boostorg/container.git synced 2025-08-02 14:04:26 +02:00
Code Issues Packages Projects Releases Wiki Activity

Remove allocation overflow warnings in some gcc versions in release mode

Browse Source
This commit is contained in:
Ion Gaztañaga
2019-04-30 18:03:40 +02:00
parent 24e420abe9
commit 4c6bea0bc7
3 changed files with 9 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/boost/container/adaptive_pool.hpp
View File

@@ -146,13 +146,13 @@ class adaptive_pool
//!Returns the number of elements that could be allocated.
//!Never throws
size_type max_size() const BOOST_NOEXCEPT_OR_NOTHROW
{ return size_type(-1)/sizeof(T); }
{ return size_type(-1)/(2u*sizeof(T)); }
//!Allocate memory for an array of count elements.
//!Throws std::bad_alloc if there is no enough memory
pointer allocate(size_type count, const void * = 0)
{
if(BOOST_UNLIKELY(count > this->max_size()))
if(BOOST_UNLIKELY(count > size_type(-1)/(2u*sizeof(T))))
boost::container::throw_bad_alloc();
if(Version == 1 && count == 1){
@@ -456,13 +456,13 @@ class private_adaptive_pool
//!Returns the number of elements that could be allocated.
//!Never throws
size_type max_size() const BOOST_NOEXCEPT_OR_NOTHROW
{ return size_type(-1)/sizeof(T); }
{ return size_type(-1)/(2u*sizeof(T)); }
//!Allocate memory for an array of count elements.
//!Throws std::bad_alloc if there is no enough memory
pointer allocate(size_type count, const void * = 0)
{
if(BOOST_UNLIKELY(count > this->max_size()))
if(BOOST_UNLIKELY(count > size_type(-1)/(2u*sizeof(T))))
boost::container::throw_bad_alloc();
if(Version == 1 && count == 1){

4
include/boost/container/allocator.hpp
View File

@@ -180,7 +180,7 @@ class allocator
pointer allocate(size_type count, const void * hint= 0)
{
(void)hint;
if(count > this->max_size())
if(count > size_type(-1)/(2u*sizeof(T)))
boost::container::throw_bad_alloc();
void *ret = dlmalloc_malloc(count*sizeof(T));
if(!ret)
@@ -196,7 +196,7 @@ class allocator
//!Returns the maximum number of elements that could be allocated.
//!Never throws
BOOST_CONTAINER_FORCEINLINE size_type max_size() const BOOST_NOEXCEPT_OR_NOTHROW
{ return size_type(-1)/sizeof(T); }
{ return size_type(-1)/(2u*sizeof(T)); }
//!Swaps two allocators, does nothing
//!because this allocator is stateless

5
include/boost/container/new_allocator.hpp
View File

@@ -154,7 +154,8 @@ class new_allocator
//!Throws std::bad_alloc if there is no enough memory
pointer allocate(size_type count)
{
if(BOOST_UNLIKELY(count > this->max_size()))
const std::size_t max_count = std::size_t(-1)/(2*sizeof(T));
if(BOOST_UNLIKELY(count > max_count))
throw_bad_alloc();
return static_cast<T*>(::operator new(count*sizeof(T)));
}
@@ -167,7 +168,7 @@ class new_allocator
//!Returns the maximum number of elements that could be allocated.
//!Never throws
size_type max_size() const BOOST_NOEXCEPT_OR_NOTHROW
{ return size_type(-1)/sizeof(T); }
{ return std::size_t(-1)/(2*sizeof(T)); }
//!Swaps two allocators, does nothing
//!because this new_allocator is stateless