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authorJonathan Wakely <jwakely@redhat.com>2018-07-24 22:09:55 +0100
committerJonathan Wakely <redi@gcc.gnu.org>2018-07-24 22:09:55 +0100
commitdfaa3c47cc0a5e858ff45e0f2ab4d686048f718e (patch)
tree2fa7f48a9def9b3dad9d767bd6a1148ed6d72af4 /libstdc++-v3/src
parente874029dd994ce1dd098a143aa06a0894da7b7de (diff)
Add initial version of C++17 <memory_resource> header
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. From-SVN: r262953
Diffstat (limited to 'libstdc++-v3/src')
-rw-r--r--libstdc++-v3/src/Makefile.am13
-rw-r--r--libstdc++-v3/src/Makefile.in15
-rw-r--r--libstdc++-v3/src/c++11/Makefile.am2
-rw-r--r--libstdc++-v3/src/c++17/Makefile.am111
-rw-r--r--libstdc++-v3/src/c++17/Makefile.in654
-rw-r--r--libstdc++-v3/src/c++17/memory_resource.cc111
6 files changed, 894 insertions, 12 deletions
diff --git a/libstdc++-v3/src/Makefile.am b/libstdc++-v3/src/Makefile.am
index ba30dde8fec..09edcdbc471 100644
--- a/libstdc++-v3/src/Makefile.am
+++ b/libstdc++-v3/src/Makefile.am
@@ -28,7 +28,7 @@ else
filesystem_dir =
endif
-SUBDIRS = c++98 c++11 $(filesystem_dir)
+SUBDIRS = c++98 c++11 c++17 $(filesystem_dir)
# Cross compiler support.
if VTV_CYGMIN
@@ -58,6 +58,7 @@ endif
vpath % $(top_srcdir)/src/c++98
vpath % $(top_srcdir)/src/c++11
+vpath % $(top_srcdir)/src/c++17
if ENABLE_FILESYSTEM_TS
vpath % $(top_srcdir)/src/filesystem
endif
@@ -92,13 +93,15 @@ libstdc___la_LIBADD = \
$(GLIBCXX_LIBS) \
$(top_builddir)/libsupc++/libsupc++convenience.la \
$(top_builddir)/src/c++98/libc++98convenience.la \
- $(top_builddir)/src/c++11/libc++11convenience.la
+ $(top_builddir)/src/c++11/libc++11convenience.la \
+ $(top_builddir)/src/c++17/libc++17convenience.la
libstdc___la_DEPENDENCIES = \
${version_dep} \
$(top_builddir)/libsupc++/libsupc++convenience.la \
$(top_builddir)/src/c++98/libc++98convenience.la \
- $(top_builddir)/src/c++11/libc++11convenience.la
+ $(top_builddir)/src/c++11/libc++11convenience.la \
+ $(top_builddir)/src/c++17/libc++17convenience.la
libstdc___la_LDFLAGS = \
-version-info $(libtool_VERSION) ${version_arg} -lm
@@ -148,8 +151,8 @@ compatibility-condvar.o: compatibility-condvar.cc
# Thus, the shared libs have more compat symbols, which can be found
# segregated in the sources with -D_GLIBCXX_SHARED.
#
-# In the sub-directories of libsupc++, src/c++98, src/c++11, only
-# -prefer-pic objects are generated for the convenience libraries.
+# In the sub-directories of libsupc++, src/c++98, src/c++11, src/c++17,
+# only -prefer-pic objects are generated for the convenience libraries.
#
# In the main src directory, make shared and static objects just for
# the compat libraries. Shared objects are compiled with -prefer-pic
diff --git a/libstdc++-v3/src/Makefile.in b/libstdc++-v3/src/Makefile.in
index d427ed539da..901533e528b 100644
--- a/libstdc++-v3/src/Makefile.in
+++ b/libstdc++-v3/src/Makefile.in
@@ -152,7 +152,7 @@ AM_RECURSIVE_TARGETS = $(RECURSIVE_TARGETS:-recursive=) \
$(RECURSIVE_CLEAN_TARGETS:-recursive=) tags TAGS ctags CTAGS
ETAGS = etags
CTAGS = ctags
-DIST_SUBDIRS = c++98 c++11 filesystem
+DIST_SUBDIRS = c++98 c++11 c++17 filesystem
ABI_TWEAKS_SRCDIR = @ABI_TWEAKS_SRCDIR@
ACLOCAL = @ACLOCAL@
ALLOCATOR_H = @ALLOCATOR_H@
@@ -379,7 +379,7 @@ WARN_CXXFLAGS = \
AM_CPPFLAGS = $(GLIBCXX_INCLUDES) $(CPPFLAGS)
@ENABLE_FILESYSTEM_TS_FALSE@filesystem_dir =
@ENABLE_FILESYSTEM_TS_TRUE@filesystem_dir = filesystem
-SUBDIRS = c++98 c++11 $(filesystem_dir)
+SUBDIRS = c++98 c++11 c++17 $(filesystem_dir)
@VTV_CYGMIN_FALSE@toolexeclib_LTLIBRARIES = libstdc++.la
# Cross compiler support.
@@ -419,13 +419,15 @@ libstdc___la_LIBADD = \
$(GLIBCXX_LIBS) \
$(top_builddir)/libsupc++/libsupc++convenience.la \
$(top_builddir)/src/c++98/libc++98convenience.la \
- $(top_builddir)/src/c++11/libc++11convenience.la
+ $(top_builddir)/src/c++11/libc++11convenience.la \
+ $(top_builddir)/src/c++17/libc++17convenience.la
libstdc___la_DEPENDENCIES = \
${version_dep} \
$(top_builddir)/libsupc++/libsupc++convenience.la \
$(top_builddir)/src/c++98/libc++98convenience.la \
- $(top_builddir)/src/c++11/libc++11convenience.la
+ $(top_builddir)/src/c++11/libc++11convenience.la \
+ $(top_builddir)/src/c++17/libc++17convenience.la
libstdc___la_LDFLAGS = \
-version-info $(libtool_VERSION) ${version_arg} -lm
@@ -440,8 +442,8 @@ libstdc___la_LINK = $(CXXLINK) $(libstdc___la_LDFLAGS)
# Thus, the shared libs have more compat symbols, which can be found
# segregated in the sources with -D_GLIBCXX_SHARED.
#
-# In the sub-directories of libsupc++, src/c++98, src/c++11, only
-# -prefer-pic objects are generated for the convenience libraries.
+# In the sub-directories of libsupc++, src/c++98, src/c++11, src/c++17,
+# only -prefer-pic objects are generated for the convenience libraries.
#
# In the main src directory, make shared and static objects just for
# the compat libraries. Shared objects are compiled with -prefer-pic
@@ -900,6 +902,7 @@ uninstall-am: uninstall-toolexeclibLTLIBRARIES
vpath % $(top_srcdir)/src/c++98
vpath % $(top_srcdir)/src/c++11
+vpath % $(top_srcdir)/src/c++17
@ENABLE_FILESYSTEM_TS_TRUE@vpath % $(top_srcdir)/src/filesystem
# Use special rules for compatibility-ldbl.cc compilation, as we need to
diff --git a/libstdc++-v3/src/c++11/Makefile.am b/libstdc++-v3/src/c++11/Makefile.am
index 91bf6f8d642..a22258782cb 100644
--- a/libstdc++-v3/src/c++11/Makefile.am
+++ b/libstdc++-v3/src/c++11/Makefile.am
@@ -1,4 +1,4 @@
-## Makefile for the C++03 sources of the GNU C++ Standard library.
+## Makefile for the C++11 sources of the GNU C++ Standard library.
##
## Copyright (C) 1997-2018 Free Software Foundation, Inc.
##
diff --git a/libstdc++-v3/src/c++17/Makefile.am b/libstdc++-v3/src/c++17/Makefile.am
new file mode 100644
index 00000000000..21b64b52dc2
--- /dev/null
+++ b/libstdc++-v3/src/c++17/Makefile.am
@@ -0,0 +1,111 @@
+## Makefile for the C++17 sources of the GNU C++ Standard library.
+##
+## Copyright (C) 1997-2018 Free Software Foundation, Inc.
+##
+## This file is part of the libstdc++ version 3 distribution.
+## Process this file with automake to produce Makefile.in.
+
+## This file is part of the GNU ISO C++ Library. This library is free
+## software; you can redistribute it and/or modify it under the
+## terms of the GNU General Public License as published by the
+## Free Software Foundation; either version 3, or (at your option)
+## any later version.
+
+## This library is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+
+## You should have received a copy of the GNU General Public License along
+## with this library; see the file COPYING3. If not see
+## <http://www.gnu.org/licenses/>.
+
+include $(top_srcdir)/fragment.am
+
+# Convenience library for C++17 runtime.
+noinst_LTLIBRARIES = libc++17convenience.la
+
+headers =
+
+sources = \
+ memory_resource.cc
+
+if ENABLE_DUAL_ABI
+extra_string_inst_sources =
+else
+extra_string_inst_sources =
+endif
+
+if ENABLE_EXTERN_TEMPLATE
+# XTEMPLATE_FLAGS = -fno-implicit-templates
+inst_sources = \
+ $(extra_string_inst_sources)
+else
+# XTEMPLATE_FLAGS =
+inst_sources =
+endif
+
+vpath % $(top_srcdir)/src/c++17
+
+libc__17convenience_la_SOURCES = $(sources) $(inst_sources)
+
+# AM_CXXFLAGS needs to be in each subdirectory so that it can be
+# modified in a per-library or per-sub-library way. Need to manually
+# set this option because CONFIG_CXXFLAGS has to be after
+# OPTIMIZE_CXXFLAGS on the compile line so that -O2 can be overridden
+# as the occasion calls for it.
+AM_CXXFLAGS = \
+ -std=gnu++17 \
+ $(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
+ $(XTEMPLATE_FLAGS) $(VTV_CXXFLAGS) \
+ $(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS)
+
+AM_MAKEFLAGS = \
+ "gxx_include_dir=$(gxx_include_dir)"
+
+# Libtool notes
+
+# 1) In general, libtool expects an argument such as `--tag=CXX' when
+# using the C++ compiler, because that will enable the settings
+# detected when C++ support was being configured. However, when no
+# such flag is given in the command line, libtool attempts to figure
+# it out by matching the compiler name in each configuration section
+# against a prefix of the command line. The problem is that, if the
+# compiler name and its initial flags stored in the libtool
+# configuration file don't match those in the command line, libtool
+# can't decide which configuration to use, and it gives up. The
+# correct solution is to add `--tag CXX' to LTCXXCOMPILE and maybe
+# CXXLINK, just after $(LIBTOOL), so that libtool doesn't have to
+# attempt to infer which configuration to use.
+#
+# The second tag argument, `--tag disable-shared` means that libtool
+# only compiles each source once, for static objects. In actuality,
+# glibcxx_lt_pic_flag and glibcxx_compiler_shared_flag are added to
+# the libtool command that is used create the object, which is
+# suitable for shared libraries. The `--tag disable-shared` must be
+# placed after --tag CXX lest things CXX undo the affect of
+# disable-shared.
+
+# 2) Need to explicitly set LTCXXCOMPILE so that EXTRA_CXX_FLAGS is
+# last. (That way, things like -O2 passed down from the toplevel can
+# be overridden by --enable-debug.)
+LTCXXCOMPILE = \
+ $(LIBTOOL) --tag CXX --tag disable-shared \
+ $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
+ --mode=compile $(CXX) $(TOPLEVEL_INCLUDES) \
+ $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) $(EXTRA_CXX_FLAGS)
+
+LTLDFLAGS = $(shell $(SHELL) $(top_srcdir)/../libtool-ldflags $(LDFLAGS))
+
+# 3) We'd have a problem when building the shared libstdc++ object if
+# the rules automake generates would be used. We cannot allow g++ to
+# be used since this would add -lstdc++ to the link line which of
+# course is problematic at this point. So, we get the top-level
+# directory to configure libstdc++-v3 to use gcc as the C++
+# compilation driver.
+CXXLINK = \
+ $(LIBTOOL) --tag CXX --tag disable-shared \
+ $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
+ --mode=link $(CXX) \
+ $(VTV_CXXLINKFLAGS) \
+ $(OPT_LDFLAGS) $(SECTION_LDFLAGS) $(AM_CXXFLAGS) $(LTLDFLAGS) -o $@
diff --git a/libstdc++-v3/src/c++17/Makefile.in b/libstdc++-v3/src/c++17/Makefile.in
new file mode 100644
index 00000000000..40b186e0a77
--- /dev/null
+++ b/libstdc++-v3/src/c++17/Makefile.in
@@ -0,0 +1,654 @@
+# Makefile.in generated by automake 1.11.6 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software
+# Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+am__make_dryrun = \
+ { \
+ am__dry=no; \
+ case $$MAKEFLAGS in \
+ *\\[\ \ ]*) \
+ echo 'am--echo: ; @echo "AM" OK' | $(MAKE) -f - 2>/dev/null \
+ | grep '^AM OK$$' >/dev/null || am__dry=yes;; \
+ *) \
+ for am__flg in $$MAKEFLAGS; do \
+ case $$am__flg in \
+ *=*|--*) ;; \
+ *n*) am__dry=yes; break;; \
+ esac; \
+ done;; \
+ esac; \
+ test $$am__dry = yes; \
+ }
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+target_triplet = @target@
+DIST_COMMON = $(top_srcdir)/fragment.am $(srcdir)/Makefile.in \
+ $(srcdir)/Makefile.am
+subdir = src/c++17
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/../config/acx.m4 \
+ $(top_srcdir)/../config/enable.m4 \
+ $(top_srcdir)/../config/futex.m4 \
+ $(top_srcdir)/../config/hwcaps.m4 \
+ $(top_srcdir)/../config/iconv.m4 \
+ $(top_srcdir)/../config/lead-dot.m4 \
+ $(top_srcdir)/../config/lib-ld.m4 \
+ $(top_srcdir)/../config/lib-link.m4 \
+ $(top_srcdir)/../config/lib-prefix.m4 \
+ $(top_srcdir)/../config/lthostflags.m4 \
+ $(top_srcdir)/../config/multi.m4 \
+ $(top_srcdir)/../config/no-executables.m4 \
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+ $(top_srcdir)/../config/stdint.m4 \
+ $(top_srcdir)/../config/unwind_ipinfo.m4 \
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+ $(top_srcdir)/../config/cet.m4 $(top_srcdir)/configure.ac
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+ $(ACLOCAL_M4)
+CONFIG_HEADER = $(top_builddir)/config.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+LTLIBRARIES = $(noinst_LTLIBRARIES)
+libc__17convenience_la_LIBADD =
+am__objects_1 = memory_resource.lo
+am__objects_2 =
+@ENABLE_EXTERN_TEMPLATE_TRUE@am__objects_3 = $(am__objects_2)
+am_libc__17convenience_la_OBJECTS = $(am__objects_1) $(am__objects_3)
+libc__17convenience_la_OBJECTS = $(am_libc__17convenience_la_OBJECTS)
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+depcomp =
+am__depfiles_maybe =
+CXXCOMPILE = $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) \
+ $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS)
+CXXLD = $(CXX)
+SOURCES = $(libc__17convenience_la_SOURCES)
+am__can_run_installinfo = \
+ case $$AM_UPDATE_INFO_DIR in \
+ n|no|NO) false;; \
+ *) (install-info --version) >/dev/null 2>&1;; \
+ esac
+ETAGS = etags
+CTAGS = ctags
+ABI_TWEAKS_SRCDIR = @ABI_TWEAKS_SRCDIR@
+ACLOCAL = @ACLOCAL@
+ALLOCATOR_H = @ALLOCATOR_H@
+ALLOCATOR_NAME = @ALLOCATOR_NAME@
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+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+LD = @LD@
+LDFLAGS = @LDFLAGS@
+LIBICONV = @LIBICONV@
+LIBOBJS = @LIBOBJS@
+LIBS = @LIBS@
+LIBTOOL = @LIBTOOL@
+LIPO = @LIPO@
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+MAKEINFO = @MAKEINFO@
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+# May be used by various substitution variables.
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+# These bits are all figured out from configure. Look in acinclude.m4
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+ $(SECTION_FLAGS) $(HWCAP_CFLAGS) -frandom-seed=$@
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+ $(WARN_FLAGS) $(WERROR_FLAG) -fdiagnostics-show-location=once
+
+
+# -I/-D flags to pass when compiling.
+AM_CPPFLAGS = $(GLIBCXX_INCLUDES) $(CPPFLAGS)
+
+# Convenience library for C++17 runtime.
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+headers =
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+ memory_resource.cc
+
+@ENABLE_DUAL_ABI_FALSE@extra_string_inst_sources =
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+
+# XTEMPLATE_FLAGS = -fno-implicit-templates
+@ENABLE_EXTERN_TEMPLATE_TRUE@inst_sources = \
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+
+libc__17convenience_la_SOURCES = $(sources) $(inst_sources)
+
+# AM_CXXFLAGS needs to be in each subdirectory so that it can be
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+# OPTIMIZE_CXXFLAGS on the compile line so that -O2 can be overridden
+# as the occasion calls for it.
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+
+AM_MAKEFLAGS = \
+ "gxx_include_dir=$(gxx_include_dir)"
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+
+# Libtool notes
+
+# 1) In general, libtool expects an argument such as `--tag=CXX' when
+# using the C++ compiler, because that will enable the settings
+# detected when C++ support was being configured. However, when no
+# such flag is given in the command line, libtool attempts to figure
+# it out by matching the compiler name in each configuration section
+# against a prefix of the command line. The problem is that, if the
+# compiler name and its initial flags stored in the libtool
+# configuration file don't match those in the command line, libtool
+# can't decide which configuration to use, and it gives up. The
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+# CXXLINK, just after $(LIBTOOL), so that libtool doesn't have to
+# attempt to infer which configuration to use.
+#
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+# suitable for shared libraries. The `--tag disable-shared` must be
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+
+# 2) Need to explicitly set LTCXXCOMPILE so that EXTRA_CXX_FLAGS is
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+# 3) We'd have a problem when building the shared libstdc++ object if
+# the rules automake generates would be used. We cannot allow g++ to
+# be used since this would add -lstdc++ to the link line which of
+# course is problematic at this point. So, we get the top-level
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+ test "$$dir" != "$$p" || dir=.; \
+ echo "rm -f \"$${dir}/so_locations\""; \
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+
+mostlyclean-compile:
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+
+distclean-compile:
+ -rm -f *.tab.c
+
+.cc.o:
+ $(CXXCOMPILE) -c -o $@ $<
+
+.cc.obj:
+ $(CXXCOMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
+
+.cc.lo:
+ $(LTCXXCOMPILE) -c -o $@ $<
+
+mostlyclean-libtool:
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+
+clean-libtool:
+ -rm -rf .libs _libs
+
+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
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+ if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+ done | \
+ $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+ END { if (nonempty) { for (i in files) print i; }; }'`; \
+ mkid -fID $$unique
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+
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+ set x; \
+ here=`pwd`; \
+ list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
+ unique=`for i in $$list; do \
+ if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
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+ -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
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+ pdf pdf-am ps ps-am tags uninstall uninstall-am
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+
+vpath % $(top_srcdir)/src/c++17
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/libstdc++-v3/src/c++17/memory_resource.cc b/libstdc++-v3/src/c++17/memory_resource.cc
new file mode 100644
index 00000000000..dd418c1b1aa
--- /dev/null
+++ b/libstdc++-v3/src/c++17/memory_resource.cc
@@ -0,0 +1,111 @@
+// <memory_resource> implementation -*- C++ -*-
+
+// Copyright (C) 2018 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+#include <memory_resource>
+#include <atomic>
+#include <new>
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+namespace pmr
+{
+ namespace
+ {
+ class newdel_res_t final : public memory_resource
+ {
+ void*
+ do_allocate(size_t __bytes, size_t __alignment) override
+ { return ::operator new(__bytes, std::align_val_t(__alignment)); }
+
+ void
+ do_deallocate(void* __p, size_t __bytes, size_t __alignment) noexcept
+ override
+ { ::operator delete(__p, __bytes, std::align_val_t(__alignment)); }
+
+ bool
+ do_is_equal(const memory_resource& __other) const noexcept override
+ { return &__other == this; }
+ };
+
+ class null_res_t final : public memory_resource
+ {
+ void*
+ do_allocate(size_t, size_t) override
+ { std::__throw_bad_alloc(); }
+
+ void
+ do_deallocate(void*, size_t, size_t) noexcept override
+ { }
+
+ bool
+ do_is_equal(const memory_resource& __other) const noexcept override
+ { return &__other == this; }
+ };
+
+ template<typename T>
+ struct constant_init
+ {
+ union {
+ unsigned char unused;
+ T obj;
+ };
+ constexpr constant_init() : obj() { }
+
+ template<typename U>
+ explicit constexpr constant_init(U arg) : obj(arg) { }
+
+ ~constant_init() { /* do nothing, union member is not destroyed */ }
+ };
+
+ constant_init<newdel_res_t> newdel_res{};
+ constant_init<null_res_t> null_res{};
+ constant_init<atomic<memory_resource*>> default_res{&newdel_res.obj};
+ } // namespace
+
+ memory_resource*
+ new_delete_resource() noexcept
+ { return &newdel_res.obj; }
+
+ memory_resource*
+ null_memory_resource() noexcept
+ { return &null_res.obj; }
+
+ memory_resource*
+ set_default_resource(memory_resource* r) noexcept
+ {
+ if (r == nullptr)
+ r = new_delete_resource();
+ return default_res.obj.exchange(r);
+ }
+
+ memory_resource*
+ get_default_resource() noexcept
+ { return default_res.obj.load(); }
+
+} // namespace pmr
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace std
+
+