The name is Zygisk

native/jni/zygisk/memory.hpp

@@ -0,0 +1,40 @@
+#pragma once
+
+#include <map>
+#include <parallel_hashmap/phmap.h>
+
+#include <utils.hpp>
+
+namespace jni_hook {
+
+struct memory_block {
+    static void *allocate(size_t sz);
+    static void deallocate(void *, size_t) { /* Monotonic increase */ }
+    static void release();
+};
+
+template<class T>
+using allocator = stateless_allocator<T, memory_block>;
+
+using string = std::basic_string<char, std::char_traits<char>, allocator<char>>;
+
+// Use node_hash_map since it will use less memory because we are using a monotonic allocator
+template<class K, class V>
+using hash_map = phmap::node_hash_map<K, V,
+    phmap::priv::hash_default_hash<K>,
+    phmap::priv::hash_default_eq<K>,
+    allocator<std::pair<const K, V>>
+>;
+
+template<class K, class V>
+using tree_map = std::map<K, V,
+    std::less<K>,
+    allocator<std::pair<const K, V>>
+>;
+
+} // namespace jni_hook
+
+// Provide heterogeneous lookup for jni_hook::string
+namespace phmap::priv {
+template <> struct HashEq<jni_hook::string> : StringHashEqT<char> {};
+} // namespace phmap::priv