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Provide a specialization of _Alloc_traits, which allows the G++ runtime to avoid 

storing an instance of the allocator in each data structure it uses.  Yaay.

llvm-svn: 9795
This commit is contained in:
Chris Lattner 2003-11-07 23:20:56 +00:00
parent 9ef636c698
commit 59c3985777
1 changed files with 13 additions and 2 deletions
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15
llvm/include/Support/MallocAllocator.h
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@ -44,11 +44,11 @@ struct MallocAllocator {
const_pointer address(const_reference x) const { return &x; }
size_type max_size() const { return ~0 / sizeof(T); }
pointer allocate(size_t n, void* hint = 0) {
static pointer allocate(size_t n, void* hint = 0) {
return (pointer)malloc(n*sizeof(T));
}
void deallocate(pointer p, size_t n) {
static void deallocate(pointer p, size_t n) {
free((void*)p);
}
@ -69,4 +69,15 @@ inline bool operator!=(const MallocAllocator<T>&, const MallocAllocator<T>&) {
return false;
}
namespace std {
template<typename Type, typename Type2>
struct _Alloc_traits<Type, ::MallocAllocator<Type2> > {
static const bool _S_instanceless = true;
typedef ::MallocAllocator<Type> base_alloc_type;
typedef ::MallocAllocator<Type> _Alloc_type;
typedef ::MallocAllocator<Type> allocator_type;
};
}
#endif