[PATCH] Add initial version of C++17 <memory_resource> header

[Jonathan Wakely]

On 25/07/18 12:01 +0100, Jonathan Wakely wrote:
>On 24/07/18 22:12 +0100, Jonathan Wakely wrote:
>>This is missing the synchronized_pool_resource and
>>unsynchronized_pool_resource classes but is otherwise complete.
>>
>>This is a new implementation, not based on the existing code in
>><experimental/memory_resource>, but memory_resource and
>>polymorphic_allocator ended up looking almost the same anyway.
>>
>>The constant_init kluge in src/c++17/memory_resource.cc is apparently
>>due to Richard Smith and ensures that the objects are constructed during
>>constant initialiation phase and not destroyed (because the
>>constant_init destructor doesn't destroy the union member and the
>>storage is not reused).
>>
>>	* config/abi/pre/gnu.ver: Export new symbols.
>>	* configure: Regenerate.
>>	* include/Makefile.am: Add new <memory_resource> header.
>>	* include/Makefile.in: Regenerate.
>>	* include/precompiled/stdc++.h: Include <memory_resource> for C++17.
>>	* include/std/memory_resource: New header.
>>	(memory_resource, polymorphic_allocator, new_delete_resource)
>>	(null_memory_resource, set_default_resource, get_default_resource)
>>	(pool_options, monotonic_buffer_resource): Define.
>>	* src/Makefile.am: Add c++17 directory.
>>	* src/Makefile.in: Regenerate.
>>	* src/c++11/Makefile.am: Fix comment.
>>	* src/c++17/Makefile.am: Add makefile for new sub-directory.
>>	* src/c++17/Makefile.in: Generate.
>>	* src/c++17/memory_resource.cc: New.
>>	(newdel_res_t, null_res_t, constant_init, newdel_res, null_res)
>>	(default_res, new_delete_resource, null_memory_resource)
>>	(set_default_resource, get_default_resource): Define.
>>	* testsuite/20_util/memory_resource/1.cc: New test.
>>	* testsuite/20_util/memory_resource/2.cc: New test.
>>	* testsuite/20_util/monotonic_buffer_resource/1.cc: New test.
>>	* testsuite/20_util/monotonic_buffer_resource/allocate.cc: New test.
>>	* testsuite/20_util/monotonic_buffer_resource/deallocate.cc: New test.
>>	* testsuite/20_util/monotonic_buffer_resource/release.cc: New test.
>>	* testsuite/20_util/monotonic_buffer_resource/upstream_resource.cc:
>>	New test.
>>	* testsuite/20_util/polymorphic_allocator/1.cc: New test.
>>	* testsuite/20_util/polymorphic_allocator/resource.cc: New test.
>>	* testsuite/20_util/polymorphic_allocator/select.cc: New test.
>>	* testsuite/util/testsuite_allocator.h (__gnu_test::memory_resource):
>>	Define concrete memory resource for testing.
>>	(__gnu_test::default_resource_mgr): Define RAII helper for changing
>>	default resource.
>>
>>Tested powerpc64le-linux, committed to trunk.
>
>I missed a change to acinclude.m4 that should have gone with this
>patch. Now also committed to trunk.

One of the tests also needs this fix.

Committed to trunk.


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