bd: Adopted the block device api in the SDBlockDevice

Author: geky

features/TESTS/filesystem/heap_block_device/main.cpp

@@ -0,0 +1,60 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+
+#include "HeapBlockDevice.h"
+#include <stdlib.h>
+
+using namespace utest::v1;
+
+#define BLOCK_SIZE 512
+uint8_t write_block[BLOCK_SIZE];
+uint8_t read_block[BLOCK_SIZE];
+
+
+void test_read_write() {
+    HeapBlockDevice bd(16*BLOCK_SIZE, BLOCK_SIZE);
+
+    int err = bd.init();
+    TEST_ASSERT_EQUAL(0, err);
+
+    // Fill with random sequence
+    srand(1);
+    for (int i = 0; i < BLOCK_SIZE; i++) {
+        write_block[i] = 0xff & rand();
+    }
+
+    // Write, sync, and read the block
+    err = bd.write(write_block, 0, BLOCK_SIZE);
+    TEST_ASSERT_EQUAL(0, err);
+
+    err = bd.read(read_block, 0, BLOCK_SIZE);
+    TEST_ASSERT_EQUAL(0, err);
+
+    // Check that the data was unmodified
+    srand(1);
+    for (int i = 0; i < BLOCK_SIZE; i++) {
+        TEST_ASSERT_EQUAL(0xff & rand(), read_block[i]);
+    }
+    
+    err = bd.deinit();
+    TEST_ASSERT_EQUAL(0, err);
+}
+
+
+// Test setup
+utest::v1::status_t test_setup(const size_t number_of_cases) {
+    GREENTEA_SETUP(10, "default_auto");
+    return verbose_test_setup_handler(number_of_cases);
+}
+
+Case cases[] = {
+    Case("Testing read write of a block", test_read_write),
+};
+
+Specification specification(test_setup, cases);
+
+int main() {
+    return !Harness::run(specification);
+}

features/filesystem/bd/HeapBlockDevice.h

@@ -58,13 +58,13 @@ class HeapBlockDevice : public BlockDevice {
      *
      *  @return         0 on success or a negative error code on failure
      */
-    virtual bd_error_t init() = 0;
+    virtual bd_error_t init();
 
     /** Deinitialize a block device
      *
      *  @return         0 on success or a negative error code on failure
      */
-    virtual bd_error_t deinit() = 0;
+    virtual bd_error_t deinit();
 
     /** Read blocks from a block device
      *
@@ -73,7 +73,7 @@ class HeapBlockDevice : public BlockDevice {
      *  @param size     Size to read in bytes, must be a multiple of read block size
      *  @return         0 on success, negative error code on failure
      */
-    virtual bd_error_t read(void *buffer, bd_addr_t addr, bd_size_t size) = 0;
+    virtual bd_error_t read(void *buffer, bd_addr_t addr, bd_size_t size);
 
     /** Program blocks to a block device
      *