Import the source code of mimalloc v2.2.3

Update to newer mimalloc versions like this:

  update_mimalloc ()
  {
      test $# = 1 || {
          echo "Need a mimalloc version" 1>&2;
          return 1
      };
      for oneline in 'mimalloc: adjust for building inside Git' 'Import the source code of mimalloc';
      do
          git revert -n HEAD^{/^"$oneline"} && git checkout HEAD -- Makefile && git commit -sm "Temporarily revert \"$oneline\"" -m 'In preparation for upgrading to a newer mimalloc version.' || return 1;
      done;
      for file in $(git show --format='%n' --name-only --diff-filter=A HEAD^{/^"Import the source code of mimalloc "}) compat/mimalloc/arena-abandon.c compat/mimalloc/free.c compat/mimalloc/libc.c compat/mimalloc/prim/prim.c compat/mimalloc/mimalloc-stats.h;
      do
          file2=${file#compat/mimalloc/};
          case "$file2" in
              segment-cache.c)
                  : no longer needed;
                  continue
              ;;
              bitmap.h | *.c)
                  file2=src/$file2
              ;;
              *.h)
                  file2=include/$file2
              ;;
          esac;
          mkdir -p "${file%/*}" && git -C /usr/src/mimalloc/ show "$1":$file2 > "$file" && git add "$file" || {
              echo "Failed: $file2 -> $file" 1>&2;
              return 1
          };
      done;
      conv_sed='sed -n "/^ *eval/d;/      /p"' && git commit -sm "Import the source code of mimalloc $1" -m "Update to newer mimalloc versions like this:" -m "$(set | sed -n '/^update_mimalloc *() *$/,/^}/{s/^./  &/;p}')" -m '  update_mimalloc $MIMALLOC_VERSION' -m 'For convenience, you can set `MIMALLOC_VERSION` and then run:' -m '  eval "$(git show -s <this-commit> | '"$conv_sed"')"' || return 1;
      git cherry-pick HEAD^{/^'mimalloc: adjust for building inside Git'} || return 1
  }

  update_mimalloc $MIMALLOC_VERSION

For convenience, you can set `MIMALLOC_VERSION` and then run:

  eval "$(git show -s <this-commit> | sed -n "/^ *eval/d;/      /p")"

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

Makefile

@@ -2198,6 +2198,7 @@ $(MIMALLOC_OBJS): COMPAT_CFLAGS += -DBANNED_H
 $(MIMALLOC_OBJS): COMPAT_CFLAGS += \
 	-Wno-attributes \
 	-Wno-unknown-pragmas \
+	-Wno-unused-function \
 	-Wno-array-bounds
 
 ifdef DEVELOPER

compat/mimalloc/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018-2025 Microsoft Corporation, Daan Leijen
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.