heap: Add new multi_heap heap implementation to replace FreeRTOS-based tagged heaps

components/heap/multi_heap_platform.h

@@ -0,0 +1,50 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// 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
+
+//     http://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.
+#pragma once
+
+#ifdef ESP_PLATFORM
+
+#include <freertos/FreeRTOS.h>
+#include <freertos/task.h>
+#include <rom/ets_sys.h>
+
+/* Because malloc/free can happen inside an ISR context,
+   we need to use portmux spinlocks here not RTOS mutexes */
+#define MULTI_HEAP_LOCK(PLOCK) do {               \
+        if((PLOCK) != NULL) {                               \
+            taskENTER_CRITICAL((portMUX_TYPE *)(PLOCK));    \
+        }                                                   \
+    } while(0)
+
+
+#define MULTI_HEAP_UNLOCK(PLOCK) do {                \
+        if ((PLOCK) != NULL) {                              \
+            taskEXIT_CRITICAL((portMUX_TYPE *)(PLOCK));     \
+        }                                                   \
+    } while(0)
+
+/* Not safe to use std i/o while in a portmux critical section,
+   can deadlock, so we use the ROM equivalent functions. */
+
+#define MULTI_HEAP_PRINTF ets_printf
+#define MULTI_HEAP_STDERR_PRINTF(MSG, ...) ets_printf(MSG, __VA_ARGS__)
+
+#else
+
+#define MULTI_HEAP_PRINTF printf
+#define MULTI_HEAP_STDERR_PRINTF(MSG, ...) fprintf(stderr, MSG, __VA_ARGS__)
+#define MULTI_HEAP_LOCK(PLOCK)
+#define MULTI_HEAP_UNLOCK(PLOCK)
+
+#endif