feat(tlsf): add memory pool expansion support (#3757)

Co-authored-by: pengyiqiang <pengyiqiang@xiaomi.com>

Kconfig

@@ -58,13 +58,18 @@ menu "LVGL configuration"
 
 	menu "Memory settings"
 		config LV_MEM_CUSTOM
-			bool "If true use custom malloc/free, otherwise use the built-in `lv_mem_alloc()` and `lv_mem_free()`"
+			bool "If true use custom malloc/free, otherwise use the built-in `lv_malloc()` and `lv_free()`"
 
 		config LV_MEM_SIZE_KILOBYTES
-			int "Size of the memory used by `lv_mem_alloc` in kilobytes (>= 2kB)"
+			int "Size of the memory used by `lv_malloc()` in kilobytes (>= 2kB)"
 			default 32
 			depends on !LV_MEM_CUSTOM
 
+		config LV_MEM_POOL_EXPAND_SIZE_KILOBYTES
+			int "Size of the memory expand for `lv_malloc()` in kilobytes"
+			default 0
+			depends on !LV_MEM_CUSTOM
+
 		config LV_MEM_ADDR
 			hex "Address for the memory pool instead of allocating it as a normal array"
 			default 0x0

lv_conf_template.h

@@ -38,6 +38,9 @@
     /*Size of the memory available for `lv_malloc()` in bytes (>= 2kB)*/
     #define LV_MEM_SIZE (128U * 1024U)          /*[bytes]*/
 
+    /*Size of the memory expand for `lv_malloc()` in bytes*/
+    #define LV_MEM_POOL_EXPAND_SIZE 0
+
     /*Set an address for the memory pool instead of allocating it as a normal array. Can be in external SRAM too.*/
     #define LV_MEM_ADR 0     /*0: unused*/
     /*Instead of an address give a memory allocator that will be called to get a memory pool for LVGL. E.g. my_malloc*/

src/lv_conf_internal.h

@@ -104,6 +104,15 @@
         #endif
     #endif
 
+    /*Size of the memory expand for `lv_malloc()` in bytes*/
+    #ifndef LV_MEM_POOL_EXPAND_SIZE
+        #ifdef CONFIG_LV_MEM_POOL_EXPAND_SIZE
+            #define LV_MEM_POOL_EXPAND_SIZE CONFIG_LV_MEM_POOL_EXPAND_SIZE
+        #else
+            #define LV_MEM_POOL_EXPAND_SIZE 0
+        #endif
+    #endif
+
     /*Set an address for the memory pool instead of allocating it as a normal array. Can be in external SRAM too.*/
     #ifndef LV_MEM_ADR
         #ifdef CONFIG_LV_MEM_ADR

src/lv_conf_kconfig.h

@@ -45,6 +45,10 @@ extern "C" {
 #  define CONFIG_LV_MEM_SIZE (CONFIG_LV_MEM_SIZE_KILOBYTES * 1024U)
 #endif
 
+#ifdef CONFIG_LV_MEM_POOL_EXPAND_SIZE_KILOBYTES
+#  define CONFIG_LV_MEM_POOL_EXPAND_SIZE (CONFIG_LV_MEM_POOL_EXPAND_SIZE_KILOBYTES * 1024U)
+#endif
+
 /*------------------
  * MONITOR POSITION
  *-----------------*/

src/misc/lv_malloc_builtin.c

@@ -94,6 +94,16 @@ void lv_mem_deinit_builtin(void)
     lv_mem_init_builtin();
 }
 
+lv_mem_builtin_pool_t * lv_mem_builtin_add_pool(void * mem, size_t bytes)
+{
+    return lv_tlsf_add_pool(tlsf, mem, bytes);
+}
+
+void lv_mem_builtin_remove_pool(lv_mem_builtin_pool_t * pool)
+{
+    lv_tlsf_remove_pool(tlsf, pool);
+}
+
 void lv_mem_monitor_builtin(lv_mem_monitor_t * mon_p)
 {
     /*Init the data*/

src/misc/lv_malloc_builtin.h

@@ -24,6 +24,8 @@ extern "C" {
  *      TYPEDEFS
  **********************/
 
+typedef void * lv_mem_builtin_pool_t;
+
 /**********************
  * GLOBAL PROTOTYPES
  **********************/
@@ -38,6 +40,20 @@ void lv_mem_init_builtin(void);
  */
 void lv_mem_deinit_builtin(void);
 
+/**
+ * Add a new memory block to the builtin memory pool.
+ * @param mem pointer to a new block of memory
+ * @param bytes memory block size
+ * @return pointer to lv_mem_builtin_pool handle
+ */
+lv_mem_builtin_pool_t * lv_mem_builtin_add_pool(void * mem, size_t bytes);
+
+/**
+ * Remove the memory pool.
+ * @param lv_mem_builtin_pool_t pointer to lv_mem_builtin_pool handle
+ */
+void lv_mem_builtin_remove_pool(lv_mem_builtin_pool_t * pool);
+
 void * lv_malloc_builtin(size_t size);
 void * lv_realloc_builtin(void * p, size_t new_size);
 void lv_free_builtin(void * p);

src/misc/lv_tlsf.c

@@ -10,7 +10,7 @@
 #undef  printf
 #define printf LV_LOG_ERROR
 
-#define TLSF_MAX_POOL_SIZE LV_MEM_SIZE
+#define TLSF_MAX_POOL_SIZE (LV_MEM_SIZE + LV_MEM_POOL_EXPAND_SIZE)
 
 #if !defined(_DEBUG)
     #define _DEBUG 0