Move every alloc over 256 bytes into PSRAM

sdkconfig.common

@@ -49,7 +49,7 @@ CONFIG_ESP32_REV_MIN_3=y
 CONFIG_ESP_PHY_REDUCE_TX_POWER=y
 CONFIG_PM_ENABLE=y
 CONFIG_SPIRAM=y
-CONFIG_SPIRAM_MALLOC_ALWAYSINTERNAL=8192
+CONFIG_SPIRAM_MALLOC_ALWAYSINTERNAL=256
 CONFIG_SPIRAM_TRY_ALLOCATE_WIFI_LWIP=y
 CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY=y
 CONFIG_SPIRAM_ALLOW_NOINIT_SEG_EXTERNAL_MEMORY=y

src/memory/CMakeLists.txt

@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
 idf_component_register(
-  SRCS "memory_resource.cpp" "allocator.cpp"
+  SRCS "memory_resource.cpp"
   INCLUDE_DIRS "include"
   REQUIRES "esp_psram")
 target_compile_options(${COMPONENT_LIB} PRIVATE ${EXTRA_WARNINGS})

src/memory/allocator.cpp

@@ -1,29 +0,0 @@
-/*
- * Copyright 2023 jacqueline <me@jacqueline.id.au>
- *
- * SPDX-License-Identifier: GPL-3.0-only
- */
-
-#include <cstdint>
-
-#include "esp_heap_caps.h"
-
-void* operator new[](std::size_t sz) {
-  if (sz == 0) {
-    ++sz;  // avoid std::malloc(0) which may return nullptr on success
-  }
-
-  if (sz > 512) {
-    return heap_caps_malloc(sz, MALLOC_CAP_SPIRAM);
-  }
-
-  return heap_caps_malloc(sz, MALLOC_CAP_DEFAULT);
-}
-
-void operator delete[](void* ptr) noexcept {
-  heap_caps_free(ptr);
-}
-
-void operator delete[](void* ptr, std::size_t size) noexcept {
-  heap_caps_free(ptr);
-}