This PR provides a templated parameter to the allocation routines. This can be used to add special behaviour in
both the successful allocation behaviour, and in the failing
to allocate cases.
The intent of this is two enable two future features
* set_new_handler - so that the failure case doesn't just set ENOMEM, and return nullptr. But can handle both the Windows and C++ versions of (_)set_new_handler.
* The success handler can be used to add checking, zeroing and in the future storing precise size information in metadata for each allocation.
* Factor out explicit Config type
Instead of using snmalloc::Alloc::Config, expose snmalloc::Config, which is then used to derive the allocator type.
* Move globalalloc to front end.
* Remove unneed template parameter from global snmalloc functions.
* Remove SNMALLOC_PASS_THROUGH
VeronaRT now has an abstraction layer which can easily replace the allocator.
Having such a complex integration still in snmalloc does not make sense.
* Take some global functions off of local alloc.
* Drop comparison overloads on atomic Capptr.
Performing a comparison on two atomic ptr is a complex operation, and should not be implicit. The memory model order and such things needs to be considered by the caller.
* Remove function_ref and use templates
The implementation prefers to use templates over the function_ref. This now only exists in the Pal for a currently unused feature.
* Removing function_ref reduces stl needs.
* Remove use of __is_convertible to support older g++
* Inline function that is only used once.
* Remove unused function
* Restrict ThreadAlloc usage to globalalloc
This commit introduces various inline functions on snmalloc:: that perform allocation/deallocation using the thread local allocator.
They remove all usage from a particular test.
* Move cheri checks to own file.
* Refactor is_owned checks.
* Move alloc_size and check_size to globalalloc.
* Minor simplification of dealloc path
* Fix up is_owned to take a config
* Improve usage of scoped allocator.
* Handle Config_ in globalalloc.
