pw_allocator: replacing malloc()
Add pw_malloc module to replace libc malloc with self defined methods.
Add pw_malloc_freelist backend to provide wrapper functions for freelist
malloc.
Change-Id: I7b645206655068d6c08063d7a520aca62d955052
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/12601
Commit-Queue: Chenghan Zhou <chenghanzh@google.com>
Reviewed-by: Chenghan Zhou <chenghanzh@google.com>
Reviewed-by: Alexei Frolov <frolv@google.com>
diff --git a/pw_malloc/backend.gni b/pw_malloc/backend.gni
new file mode 100644
index 0000000..e0d62a0
--- /dev/null
+++ b/pw_malloc/backend.gni
@@ -0,0 +1,18 @@
+# Copyright 2020 The Pigweed Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+declare_args() {
+ # Backends for the pw_malloc facade.
+ pw_malloc_BACKEND = ""
+}