Add mmap allocator

src/main.c

@@ -22,9 +22,9 @@ static void arena_test_1(void)
 {
     ArenaParams arena_params = {};
     arena_params.size = 1024+ARENA_HEADER_SZ;
-    Arena *arena = arena_alloc_(&arena_params);
+    Arena *arena = arena_alloc(&arena_params);
     arena_dump(arena);
-    char *ptr = arena_push(arena, 512, 1);
+    void *ptr = arena_push(arena, 512, 1);
     MemoryZero(ptr, 512);
     printf("Allocated ptr %p\n", ptr);
     arena_dump(arena);
@@ -43,27 +43,35 @@ static void arena_test_2(void)
 {
     ArenaParams arena_params = {};
     arena_params.size = 1024+ARENA_HEADER_SZ;
-    Arena *arena = arena_alloc_(&arena_params);
+    arena_params.flags = ArenaFlag_UseMalloc;
+    Arena *arena = arena_alloc(&arena_params);
 
     void *ptr;
     ptr = arena_push(arena, 1024, 8);
+    MemoryZero(ptr, 1024);
     printf("Allocated ptr %p\n", ptr);
 
     arena_dump(arena);
     ArenaCheckPoint checkpoint = arena_temp_begin(arena);
     ptr = arena_push(arena, 4096, 8);
+    MemoryZero(ptr, 4096);
+
     ptr = arena_push(arena, 4096, 8);
+    MemoryZero(ptr, 4096);
 
     ArenaCheckPoint checkpoint2 = arena_temp_begin(arena);
     ptr = arena_push(arena, 64, 8);
+    MemoryZero(ptr, 64);
+
     arena_temp_end(&checkpoint2);
 
     arena_temp_end(&checkpoint);
     arena_pop_to(arena, 1088);
     arena_dump(arena);
     ptr = arena_push(arena, 1, 1);
-    ((U8*)ptr)[1] =1; //OOB
+    ((U8*)ptr)[0] = 0x37;
     ptr = arena_push(arena, 1, 1);
+    ((U8*)ptr)[0] = 0x73;
     arena_pop_to(arena, 1089);
     arena_dump(arena);