[memory] First step towards a new FlushableMemory type

src/memory.c

@@ -199,3 +199,21 @@ bool cxMemoryIsFreed(void *pointer) {
 void cxFreeUntil(void *pointer) {
     memoryFreeUntil(&cxMemory, pointer);
 }
+
+/***********************************************************************/
+/* New FlushableMemory */
+
+void initFlushableMemory(FlushableMemory *memory) {
+    memory->size = 0;
+    memory->top = 0;
+    memory->blocks = NULL;
+}
+
+void *allocateFlushableMemory(FlushableMemory *memory, size_t size) {
+    if (memory->blocks == NULL) {
+        memory->blocks = malloc(100*sizeof(void *));
+    }
+    memory->blocks[memory->top] = malloc(size);
+    memory->top++;
+    return memory->blocks[memory->top-1];
+}

src/memory.h

@@ -36,6 +36,19 @@ extern bool memoryIsBetween(Memory *memory, void *pointer, int low, int high);
 extern void memoryFreeUntil(Memory *memory, void *pointer);
 
 
+/***********************************************************************/
+/* New, so far, unused new Memory handling */
+
+typedef struct {
+    int size;
+    int top;
+    void **blocks;
+} FlushableMemory;
+
+extern void initFlushableMemory(FlushableMemory *memory);
+extern void *allocateFlushableMemory(FlushableMemory *memory, size_t size);
+
+
 /***********************************************************************/
 
 extern jmp_buf memoryResizeJumpTarget;

src/memory_tests.c

@@ -160,3 +160,24 @@ Ensure(Memory, will_fatal_if_reallocing_not_last_allocated) {
 
     assert_that(internalCheckFailCalled);
 }
+
+Ensure(Memory, can_allocate_single_block_in_flushable_memory) {
+    FlushableMemory memory;
+
+    initFlushableMemory(&memory);
+
+    void *block = allocateFlushableMemory(&memory, 4);
+    assert_that(block, is_not_null);
+}
+
+Ensure(Memory, can_reallocate_block_array_for_overflow) {
+    FlushableMemory memory;
+
+    initFlushableMemory(&memory);
+
+    for (int i=0; i < 10000; i++) {
+        allocateFlushableMemory(&memory, 4);
+    }
+    void *block = allocateFlushableMemory(&memory, 4);
+    assert_that(block, is_not_null);
+}