Add temp arena support

tests/allocator/test_allocator.c

@@ -2,6 +2,13 @@
 #include "wapp.h"
 #include <stdlib.h>
 
+// NOTE (Abdelrahman): Cannot query size of Arena here so it's hardcoded. Similarly, since arena
+// allocation are aligned to power of 2 boundaries, the number of i32 values needed is hardcoded.
+#define TEMP_BUF_SIZE (40 + sizeof(i32) * 8)
+
+wapp_intern u8 temp_buf[TEMP_BUF_SIZE] = {0};
+wapp_intern Allocator temp_allocator       = {0};
+
 TestFuncResult test_arena_allocator(void) {
 	Allocator allocator = wapp_mem_arena_allocator_init(4096);
 	b8 result           = allocator.obj != NULL && allocator.alloc != NULL &&
@@ -31,3 +38,30 @@ TestFuncResult test_arena_allocator_with_buffer(void) {
 
 	return wapp_tester_result(result);
 }
+
+TestFuncResult test_arena_allocator_temp_begin(void) {
+	temp_allocator = wapp_mem_arena_allocator_init_with_buffer(temp_buf, TEMP_BUF_SIZE);
+
+	i32 *num1 = (i32 *)wapp_mem_allocator_alloc(&temp_allocator, sizeof(i32));
+	b8 result = num1 != NULL;
+
+	wapp_mem_arena_allocator_temp_begin(&temp_allocator);
+	i32 *num2 = (i32 *)wapp_mem_allocator_alloc(&temp_allocator, sizeof(i32));
+	result    = result && num2 != NULL;
+	i32 *num3 = (i32 *)wapp_mem_allocator_alloc(&temp_allocator, sizeof(i32));
+	result    = result && num3 == NULL;
+
+	return wapp_tester_result(result);
+}
+
+TestFuncResult test_arena_allocator_temp_end(void) {
+	wapp_mem_arena_allocator_temp_end(&temp_allocator);
+	i32 *num1 = (i32 *)wapp_mem_allocator_alloc(&temp_allocator, sizeof(i32));
+	b8 result = num1 != NULL;
+	i32 *num2 = (i32 *)wapp_mem_allocator_alloc(&temp_allocator, sizeof(i32));
+	result    = result && num2 == NULL;
+
+	wapp_mem_arena_allocator_destroy(&temp_allocator);
+
+	return wapp_tester_result(result);
+}